/**
 * @license
 * Copyright 2025 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
import { describe, it, expect, vi, beforeEach } from 'vitest';
import { act } from 'react';
import { renderHook } from '../../test-utils/render.js';
import { waitFor } from '../../test-utils/async.js';
import { useGeminiStream } from './useGeminiStream.js';
import { useKeypress } from './useKeypress.js';
import * as atCommandProcessor from './atCommandProcessor.js';
import { useReactToolScheduler } from './useReactToolScheduler.js';
import { ApprovalMode, AuthType, GeminiEventType as ServerGeminiEventType, ToolErrorType, ToolConfirmationOutcome, tokenLimit, debugLogger, coreEvents, CoreEvent, } from '@google/gemini-cli-core';
import { MessageType, StreamingState } from '../types.js';
// --- MOCKS ---
const mockSendMessageStream = vi
    .fn()
    .mockReturnValue((async function* () { })());
const mockStartChat = vi.fn();
const MockedGeminiClientClass = vi.hoisted(() => vi.fn().mockImplementation(function (_config) {
    // _config
    this.startChat = mockStartChat;
    this.sendMessageStream = mockSendMessageStream;
    this.addHistory = vi.fn();
    this.getChat = vi.fn().mockReturnValue({
        recordCompletedToolCalls: vi.fn(),
    });
    this.getChatRecordingService = vi.fn().mockReturnValue({
        recordThought: vi.fn(),
        initialize: vi.fn(),
        recordMessage: vi.fn(),
        recordMessageTokens: vi.fn(),
        recordToolCalls: vi.fn(),
        getConversationFile: vi.fn(),
    });
}));
const MockedUserPromptEvent = vi.hoisted(() => vi.fn().mockImplementation(() => { }));
const mockParseAndFormatApiError = vi.hoisted(() => vi.fn());
vi.mock('@google/gemini-cli-core', async (importOriginal) => {
    const actualCoreModule = (await importOriginal());
    return {
        ...actualCoreModule,
        GitService: vi.fn(),
        GeminiClient: MockedGeminiClientClass,
        UserPromptEvent: MockedUserPromptEvent,
        parseAndFormatApiError: mockParseAndFormatApiError,
        tokenLimit: vi.fn().mockReturnValue(100), // Mock tokenLimit
    };
});
const mockUseReactToolScheduler = useReactToolScheduler;
vi.mock('./useReactToolScheduler.js', async (importOriginal) => {
    const actualSchedulerModule = (await importOriginal());
    return {
        ...(actualSchedulerModule || {}),
        useReactToolScheduler: vi.fn(),
    };
});
vi.mock('./useKeypress.js', () => ({
    useKeypress: vi.fn(),
}));
vi.mock('./shellCommandProcessor.js', () => ({
    useShellCommandProcessor: vi.fn().mockReturnValue({
        handleShellCommand: vi.fn(),
        activeShellPtyId: null,
        lastShellOutputTime: 0,
    }),
}));
vi.mock('./atCommandProcessor.js');
vi.mock('../utils/markdownUtilities.js', () => ({
    findLastSafeSplitPoint: vi.fn((s) => s.length),
}));
vi.mock('./useStateAndRef.js', () => ({
    useStateAndRef: vi.fn((initial) => {
        let val = initial;
        const ref = { current: val };
        const setVal = vi.fn((updater) => {
            if (typeof updater === 'function') {
                val = updater(val);
            }
            else {
                val = updater;
            }
            ref.current = val;
        });
        return [val, ref, setVal];
    }),
}));
vi.mock('./useLogger.js', () => ({
    useLogger: vi.fn().mockReturnValue({
        logMessage: vi.fn().mockResolvedValue(undefined),
    }),
}));
const mockStartNewPrompt = vi.fn();
const mockAddUsage = vi.fn();
vi.mock('../contexts/SessionContext.js', () => ({
    useSessionStats: vi.fn(() => ({
        startNewPrompt: mockStartNewPrompt,
        addUsage: mockAddUsage,
        getPromptCount: vi.fn(() => 5),
    })),
}));
vi.mock('./slashCommandProcessor.js', () => ({
    handleSlashCommand: vi.fn().mockReturnValue(false),
}));
vi.mock('./useAlternateBuffer.js', () => ({
    useAlternateBuffer: vi.fn(() => false),
}));
// --- END MOCKS ---
// --- Tests for useGeminiStream Hook ---
describe('useGeminiStream', () => {
    let mockAddItem;
    let mockConfig;
    let mockOnDebugMessage;
    let mockHandleSlashCommand;
    let mockScheduleToolCalls;
    let mockCancelAllToolCalls;
    let mockMarkToolsAsSubmitted;
    let handleAtCommandSpy;
    beforeEach(() => {
        vi.clearAllMocks(); // Clear mocks before each test
        mockAddItem = vi.fn();
        // Define the mock for getGeminiClient
        const mockGetGeminiClient = vi.fn().mockImplementation(() => {
            // MockedGeminiClientClass is defined in the module scope by the previous change.
            // It will use the mockStartChat and mockSendMessageStream that are managed within beforeEach.
            const clientInstance = new MockedGeminiClientClass(mockConfig);
            return clientInstance;
        });
        const contentGeneratorConfig = {
            model: 'test-model',
            apiKey: 'test-key',
            vertexai: false,
            authType: AuthType.USE_GEMINI,
        };
        mockConfig = {
            apiKey: 'test-api-key',
            model: 'gemini-pro',
            sandbox: false,
            targetDir: '/test/dir',
            debugMode: false,
            question: undefined,
            coreTools: [],
            toolDiscoveryCommand: undefined,
            toolCallCommand: undefined,
            mcpServerCommand: undefined,
            mcpServers: undefined,
            userAgent: 'test-agent',
            userMemory: '',
            geminiMdFileCount: 0,
            alwaysSkipModificationConfirmation: false,
            vertexai: false,
            showMemoryUsage: false,
            contextFileName: undefined,
            getToolRegistry: vi.fn(() => ({ getToolSchemaList: vi.fn(() => []) })),
            getProjectRoot: vi.fn(() => '/test/dir'),
            getCheckpointingEnabled: vi.fn(() => false),
            getGeminiClient: mockGetGeminiClient,
            getApprovalMode: () => ApprovalMode.DEFAULT,
            getUsageStatisticsEnabled: () => true,
            getDebugMode: () => false,
            addHistory: vi.fn(),
            getSessionId() {
                return 'test-session-id';
            },
            setQuotaErrorOccurred: vi.fn(),
            getQuotaErrorOccurred: vi.fn(() => false),
            getModel: vi.fn(() => 'gemini-2.5-pro'),
            getContentGeneratorConfig: vi
                .fn()
                .mockReturnValue(contentGeneratorConfig),
            isInteractive: () => false,
            getExperiments: () => { },
        };
        mockOnDebugMessage = vi.fn();
        mockHandleSlashCommand = vi.fn().mockResolvedValue(false);
        // Mock return value for useReactToolScheduler
        mockScheduleToolCalls = vi.fn();
        mockCancelAllToolCalls = vi.fn();
        mockMarkToolsAsSubmitted = vi.fn();
        // Default mock for useReactToolScheduler to prevent toolCalls being undefined initially
        mockUseReactToolScheduler.mockReturnValue([
            [], // Default to empty array for toolCalls
            mockScheduleToolCalls,
            mockMarkToolsAsSubmitted,
            vi.fn(), // setToolCallsForDisplay
            mockCancelAllToolCalls,
            0, // lastToolOutputTime
        ]);
        // Reset mocks for GeminiClient instance methods (startChat and sendMessageStream)
        // The GeminiClient constructor itself is mocked at the module level.
        mockStartChat.mockClear().mockResolvedValue({
            sendMessageStream: mockSendMessageStream,
        }); // GeminiChat -> any
        mockSendMessageStream
            .mockClear()
            .mockReturnValue((async function* () { })());
        handleAtCommandSpy = vi.spyOn(atCommandProcessor, 'handleAtCommand');
    });
    const mockLoadedSettings = {
        merged: { preferredEditor: 'vscode' },
        user: { path: '/user/settings.json', settings: {} },
        workspace: { path: '/workspace/.gemini/settings.json', settings: {} },
        errors: [],
        forScope: vi.fn(),
        setValue: vi.fn(),
    };
    const renderTestHook = (initialToolCalls = [], geminiClient) => {
        const client = geminiClient || mockConfig.getGeminiClient();
        const initialProps = {
            client,
            history: [],
            addItem: mockAddItem,
            config: mockConfig,
            onDebugMessage: mockOnDebugMessage,
            handleSlashCommand: mockHandleSlashCommand,
            shellModeActive: false,
            loadedSettings: mockLoadedSettings,
            toolCalls: initialToolCalls,
        };
        const { result, rerender } = renderHook((props) => {
            // This mock needs to be stateful. When setToolCallsForDisplay is called,
            // it should trigger a rerender with the new state.
            const mockSetToolCallsForDisplay = vi.fn((updater) => {
                const newToolCalls = typeof updater === 'function' ? updater(props.toolCalls) : updater;
                rerender({ ...props, toolCalls: newToolCalls });
            });
            // Create a stateful mock for cancellation that updates the toolCalls state.
            const statefulCancelAllToolCalls = vi.fn((...args) => {
                // Call the original spy so `toHaveBeenCalled` checks still work.
                mockCancelAllToolCalls(...args);
                const newToolCalls = props.toolCalls.map((tc) => {
                    // Only cancel tools that are in a cancellable state.
                    if (tc.status === 'awaiting_approval' ||
                        tc.status === 'executing' ||
                        tc.status === 'scheduled' ||
                        tc.status === 'validating') {
                        // A real cancelled tool call has a response object.
                        // We need to simulate this to avoid type errors downstream.
                        return {
                            ...tc,
                            status: 'cancelled',
                            response: {
                                callId: tc.request.callId,
                                responseParts: [],
                                resultDisplay: 'Request cancelled.',
                            },
                            responseSubmittedToGemini: true, // Mark as "processed"
                        };
                    }
                    return tc;
                });
                rerender({ ...props, toolCalls: newToolCalls });
            });
            mockUseReactToolScheduler.mockImplementation(() => [
                props.toolCalls,
                mockScheduleToolCalls,
                mockMarkToolsAsSubmitted,
                mockSetToolCallsForDisplay,
                statefulCancelAllToolCalls, // Use the stateful mock
            ]);
            return useGeminiStream(props.client, props.history, props.addItem, props.config, props.loadedSettings, props.onDebugMessage, props.handleSlashCommand, props.shellModeActive, () => 'vscode', () => { }, () => Promise.resolve(), false, () => { }, () => { }, () => { }, 80, 24);
        }, {
            initialProps,
        });
        return {
            result,
            rerender,
            mockMarkToolsAsSubmitted,
            mockSendMessageStream,
            client,
        };
    };
    // Helper to create mock tool calls - reduces boilerplate
    const createMockToolCall = (toolName, callId, confirmationType, mockOnConfirm, status = 'awaiting_approval') => ({
        request: {
            callId,
            name: toolName,
            args: {},
            isClientInitiated: false,
            prompt_id: 'prompt-id-1',
        },
        status: status,
        responseSubmittedToGemini: false,
        confirmationDetails: confirmationType === 'edit'
            ? {
                type: 'edit',
                title: 'Confirm Edit',
                onConfirm: mockOnConfirm,
                fileName: 'file.txt',
                filePath: '/test/file.txt',
                fileDiff: 'fake diff',
                originalContent: 'old',
                newContent: 'new',
            }
            : {
                type: 'info',
                title: `${toolName} confirmation`,
                onConfirm: mockOnConfirm,
                prompt: `Execute ${toolName}?`,
            },
        tool: {
            name: toolName,
            displayName: toolName,
            description: `${toolName} description`,
            build: vi.fn(),
        },
        invocation: {
            getDescription: () => 'Mock description',
        },
    });
    // Helper to render hook with default parameters - reduces boilerplate
    const renderHookWithDefaults = (options = {}) => {
        const { shellModeActive = false, onCancelSubmit = () => { }, setShellInputFocused = () => { }, performMemoryRefresh = () => Promise.resolve(), onAuthError = () => { }, setModelSwitched = vi.fn(), modelSwitched = false, } = options;
        return renderHook(() => useGeminiStream(new MockedGeminiClientClass(mockConfig), [], mockAddItem, mockConfig, mockLoadedSettings, mockOnDebugMessage, mockHandleSlashCommand, shellModeActive, () => 'vscode', onAuthError, performMemoryRefresh, modelSwitched, setModelSwitched, onCancelSubmit, setShellInputFocused, 80, 24));
    };
    it('should not submit tool responses if not all tool calls are completed', () => {
        const toolCalls = [
            {
                request: {
                    callId: 'call1',
                    name: 'tool1',
                    args: {},
                    isClientInitiated: false,
                    prompt_id: 'prompt-id-1',
                },
                status: 'success',
                responseSubmittedToGemini: false,
                response: {
                    callId: 'call1',
                    responseParts: [{ text: 'tool 1 response' }],
                    error: undefined,
                    errorType: undefined, // FIX: Added missing property
                    resultDisplay: 'Tool 1 success display',
                },
                tool: {
                    name: 'tool1',
                    displayName: 'tool1',
                    description: 'desc1',
                    build: vi.fn(),
                },
                invocation: {
                    getDescription: () => `Mock description`,
                },
                startTime: Date.now(),
                endTime: Date.now(),
            },
            {
                request: {
                    callId: 'call2',
                    name: 'tool2',
                    args: {},
                    prompt_id: 'prompt-id-1',
                },
                status: 'executing',
                responseSubmittedToGemini: false,
                tool: {
                    name: 'tool2',
                    displayName: 'tool2',
                    description: 'desc2',
                    build: vi.fn(),
                },
                invocation: {
                    getDescription: () => `Mock description`,
                },
                startTime: Date.now(),
                liveOutput: '...',
            },
        ];
        const { mockMarkToolsAsSubmitted, mockSendMessageStream } = renderTestHook(toolCalls);
        // Effect for submitting tool responses depends on toolCalls and isResponding
        // isResponding is initially false, so the effect should run.
        expect(mockMarkToolsAsSubmitted).not.toHaveBeenCalled();
        expect(mockSendMessageStream).not.toHaveBeenCalled(); // submitQuery uses this
    });
    it('should submit tool responses when all tool calls are completed and ready', async () => {
        const toolCall1ResponseParts = [{ text: 'tool 1 final response' }];
        const toolCall2ResponseParts = [{ text: 'tool 2 final response' }];
        const completedToolCalls = [
            {
                request: {
                    callId: 'call1',
                    name: 'tool1',
                    args: {},
                    isClientInitiated: false,
                    prompt_id: 'prompt-id-2',
                },
                status: 'success',
                responseSubmittedToGemini: false,
                response: {
                    callId: 'call1',
                    responseParts: toolCall1ResponseParts,
                    errorType: undefined, // FIX: Added missing property
                },
                tool: {
                    displayName: 'MockTool',
                },
                invocation: {
                    getDescription: () => `Mock description`,
                },
            },
            {
                request: {
                    callId: 'call2',
                    name: 'tool2',
                    args: {},
                    isClientInitiated: false,
                    prompt_id: 'prompt-id-2',
                },
                status: 'error',
                responseSubmittedToGemini: false,
                response: {
                    callId: 'call2',
                    responseParts: toolCall2ResponseParts,
                    errorType: ToolErrorType.UNHANDLED_EXCEPTION, // FIX: Added missing property
                },
            },
        ];
        // Capture the onComplete callback
        let capturedOnComplete = null;
        mockUseReactToolScheduler.mockImplementation((onComplete) => {
            capturedOnComplete = onComplete;
            return [[], mockScheduleToolCalls, mockMarkToolsAsSubmitted, vi.fn()];
        });
        renderHook(() => useGeminiStream(new MockedGeminiClientClass(mockConfig), [], mockAddItem, mockConfig, mockLoadedSettings, mockOnDebugMessage, mockHandleSlashCommand, false, () => 'vscode', () => { }, () => Promise.resolve(), false, () => { }, () => { }, () => { }, 80, 24));
        // Trigger the onComplete callback with completed tools
        await act(async () => {
            if (capturedOnComplete) {
                await capturedOnComplete(completedToolCalls);
            }
        });
        await waitFor(() => {
            expect(mockMarkToolsAsSubmitted).toHaveBeenCalledTimes(1);
            expect(mockSendMessageStream).toHaveBeenCalledTimes(1);
        });
        const expectedMergedResponse = [
            ...toolCall1ResponseParts,
            ...toolCall2ResponseParts,
        ];
        expect(mockSendMessageStream).toHaveBeenCalledWith(expectedMergedResponse, expect.any(AbortSignal), 'prompt-id-2');
    });
    it('should handle all tool calls being cancelled', async () => {
        const cancelledToolCalls = [
            {
                request: {
                    callId: '1',
                    name: 'testTool',
                    args: {},
                    isClientInitiated: false,
                    prompt_id: 'prompt-id-3',
                },
                status: 'cancelled',
                response: {
                    callId: '1',
                    responseParts: [{ text: 'cancelled' }],
                    errorType: undefined, // FIX: Added missing property
                },
                responseSubmittedToGemini: false,
                tool: {
                    displayName: 'mock tool',
                },
                invocation: {
                    getDescription: () => `Mock description`,
                },
            },
        ];
        const client = new MockedGeminiClientClass(mockConfig);
        // Capture the onComplete callback
        let capturedOnComplete = null;
        mockUseReactToolScheduler.mockImplementation((onComplete) => {
            capturedOnComplete = onComplete;
            return [[], mockScheduleToolCalls, mockMarkToolsAsSubmitted, vi.fn()];
        });
        renderHook(() => useGeminiStream(client, [], mockAddItem, mockConfig, mockLoadedSettings, mockOnDebugMessage, mockHandleSlashCommand, false, () => 'vscode', () => { }, () => Promise.resolve(), false, () => { }, () => { }, () => { }, 80, 24));
        // Trigger the onComplete callback with cancelled tools
        await act(async () => {
            if (capturedOnComplete) {
                await capturedOnComplete(cancelledToolCalls);
            }
        });
        await waitFor(() => {
            expect(mockMarkToolsAsSubmitted).toHaveBeenCalledWith(['1']);
            expect(client.addHistory).toHaveBeenCalledWith({
                role: 'user',
                parts: [{ text: 'cancelled' }],
            });
            // Ensure we do NOT call back to the API
            expect(mockSendMessageStream).not.toHaveBeenCalled();
        });
    });
    it('should stop agent execution immediately when a tool call returns STOP_EXECUTION error', async () => {
        const stopExecutionToolCalls = [
            {
                request: {
                    callId: 'stop-call',
                    name: 'stopTool',
                    args: {},
                    isClientInitiated: false,
                    prompt_id: 'prompt-id-stop',
                },
                status: 'error',
                response: {
                    callId: 'stop-call',
                    responseParts: [{ text: 'error occurred' }],
                    errorType: ToolErrorType.STOP_EXECUTION,
                    error: new Error('Stop reason from hook'),
                    resultDisplay: undefined,
                },
                responseSubmittedToGemini: false,
                tool: {
                    displayName: 'stop tool',
                },
                invocation: {
                    getDescription: () => `Mock description`,
                },
            },
        ];
        const client = new MockedGeminiClientClass(mockConfig);
        // Capture the onComplete callback
        let capturedOnComplete = null;
        mockUseReactToolScheduler.mockImplementation((onComplete) => {
            capturedOnComplete = onComplete;
            return [
                [],
                mockScheduleToolCalls,
                mockMarkToolsAsSubmitted,
                vi.fn(),
                mockCancelAllToolCalls,
            ];
        });
        const { result } = renderHook(() => useGeminiStream(client, [], mockAddItem, mockConfig, mockLoadedSettings, mockOnDebugMessage, mockHandleSlashCommand, false, () => 'vscode', () => { }, () => Promise.resolve(), false, () => { }, () => { }, () => { }, 80, 24));
        // Trigger the onComplete callback with STOP_EXECUTION tool
        await act(async () => {
            if (capturedOnComplete) {
                await capturedOnComplete(stopExecutionToolCalls);
            }
        });
        await waitFor(() => {
            expect(mockMarkToolsAsSubmitted).toHaveBeenCalledWith(['stop-call']);
            // Should add an info message to history
            expect(mockAddItem).toHaveBeenCalledWith(expect.objectContaining({
                type: MessageType.INFO,
                text: expect.stringContaining('Agent execution stopped: Stop reason from hook'),
            }));
            // Ensure we do NOT call back to the API
            expect(mockSendMessageStream).not.toHaveBeenCalled();
            // Streaming state should be Idle
            expect(result.current.streamingState).toBe(StreamingState.Idle);
        });
    });
    it('should group multiple cancelled tool call responses into a single history entry', async () => {
        const cancelledToolCall1 = {
            request: {
                callId: 'cancel-1',
                name: 'toolA',
                args: {},
                isClientInitiated: false,
                prompt_id: 'prompt-id-7',
            },
            tool: {
                name: 'toolA',
                displayName: 'toolA',
                description: 'descA',
                build: vi.fn(),
            },
            invocation: {
                getDescription: () => `Mock description`,
            },
            status: 'cancelled',
            response: {
                callId: 'cancel-1',
                responseParts: [
                    { functionResponse: { name: 'toolA', id: 'cancel-1' } },
                ],
                resultDisplay: undefined,
                error: undefined,
                errorType: undefined, // FIX: Added missing property
            },
            responseSubmittedToGemini: false,
        };
        const cancelledToolCall2 = {
            request: {
                callId: 'cancel-2',
                name: 'toolB',
                args: {},
                isClientInitiated: false,
                prompt_id: 'prompt-id-8',
            },
            tool: {
                name: 'toolB',
                displayName: 'toolB',
                description: 'descB',
                build: vi.fn(),
            },
            invocation: {
                getDescription: () => `Mock description`,
            },
            status: 'cancelled',
            response: {
                callId: 'cancel-2',
                responseParts: [
                    { functionResponse: { name: 'toolB', id: 'cancel-2' } },
                ],
                resultDisplay: undefined,
                error: undefined,
                errorType: undefined, // FIX: Added missing property
            },
            responseSubmittedToGemini: false,
        };
        const allCancelledTools = [cancelledToolCall1, cancelledToolCall2];
        const client = new MockedGeminiClientClass(mockConfig);
        let capturedOnComplete = null;
        mockUseReactToolScheduler.mockImplementation((onComplete) => {
            capturedOnComplete = onComplete;
            return [[], mockScheduleToolCalls, mockMarkToolsAsSubmitted, vi.fn()];
        });
        renderHook(() => useGeminiStream(client, [], mockAddItem, mockConfig, mockLoadedSettings, mockOnDebugMessage, mockHandleSlashCommand, false, () => 'vscode', () => { }, () => Promise.resolve(), false, () => { }, () => { }, () => { }, 80, 24));
        // Trigger the onComplete callback with multiple cancelled tools
        await act(async () => {
            if (capturedOnComplete) {
                await capturedOnComplete(allCancelledTools);
            }
        });
        await waitFor(() => {
            // The tools should be marked as submitted locally
            expect(mockMarkToolsAsSubmitted).toHaveBeenCalledWith([
                'cancel-1',
                'cancel-2',
            ]);
            // Crucially, addHistory should be called only ONCE
            expect(client.addHistory).toHaveBeenCalledTimes(1);
            // And that single call should contain BOTH function responses
            expect(client.addHistory).toHaveBeenCalledWith({
                role: 'user',
                parts: [
                    ...cancelledToolCall1.response.responseParts,
                    ...cancelledToolCall2.response.responseParts,
                ],
            });
            // No message should be sent back to the API for a turn with only cancellations
            expect(mockSendMessageStream).not.toHaveBeenCalled();
        });
    });
    it('should not flicker streaming state to Idle between tool completion and submission', async () => {
        const toolCallResponseParts = [
            { text: 'tool 1 final response' },
        ];
        const initialToolCalls = [
            {
                request: {
                    callId: 'call1',
                    name: 'tool1',
                    args: {},
                    isClientInitiated: false,
                    prompt_id: 'prompt-id-4',
                },
                status: 'executing',
                responseSubmittedToGemini: false,
                tool: {
                    name: 'tool1',
                    displayName: 'tool1',
                    description: 'desc',
                    build: vi.fn(),
                },
                invocation: {
                    getDescription: () => `Mock description`,
                },
                startTime: Date.now(),
            },
        ];
        const completedToolCalls = [
            {
                ...initialToolCalls[0],
                status: 'success',
                response: {
                    callId: 'call1',
                    responseParts: toolCallResponseParts,
                    error: undefined,
                    errorType: undefined, // FIX: Added missing property
                    resultDisplay: 'Tool 1 success display',
                },
                endTime: Date.now(),
            },
        ];
        // Capture the onComplete callback
        let capturedOnComplete = null;
        let currentToolCalls = initialToolCalls;
        mockUseReactToolScheduler.mockImplementation((onComplete) => {
            capturedOnComplete = onComplete;
            return [
                currentToolCalls,
                mockScheduleToolCalls,
                mockMarkToolsAsSubmitted,
                vi.fn(), // setToolCallsForDisplay
            ];
        });
        const { result, rerender } = renderHook(() => useGeminiStream(new MockedGeminiClientClass(mockConfig), [], mockAddItem, mockConfig, mockLoadedSettings, mockOnDebugMessage, mockHandleSlashCommand, false, () => 'vscode', () => { }, () => Promise.resolve(), false, () => { }, () => { }, () => { }, 80, 24));
        // 1. Initial state should be Responding because a tool is executing.
        expect(result.current.streamingState).toBe(StreamingState.Responding);
        // 2. Update the tool calls to completed state and rerender
        currentToolCalls = completedToolCalls;
        mockUseReactToolScheduler.mockImplementation((onComplete) => {
            capturedOnComplete = onComplete;
            return [
                completedToolCalls,
                mockScheduleToolCalls,
                mockMarkToolsAsSubmitted,
                vi.fn(), // setToolCallsForDisplay
            ];
        });
        act(() => {
            rerender();
        });
        // 3. The state should *still* be Responding, not Idle.
        // This is because the completed tool's response has not been submitted yet.
        expect(result.current.streamingState).toBe(StreamingState.Responding);
        // 4. Trigger the onComplete callback to simulate tool completion
        await act(async () => {
            if (capturedOnComplete) {
                await capturedOnComplete(completedToolCalls);
            }
        });
        // 5. Wait for submitQuery to be called
        await waitFor(() => {
            expect(mockSendMessageStream).toHaveBeenCalledWith(toolCallResponseParts, expect.any(AbortSignal), 'prompt-id-4');
        });
        // 6. After submission, the state should remain Responding until the stream completes.
        expect(result.current.streamingState).toBe(StreamingState.Responding);
    });
    describe('User Cancellation', () => {
        let keypressCallback;
        const mockUseKeypress = useKeypress;
        beforeEach(() => {
            // Capture the callback passed to useKeypress
            mockUseKeypress.mockImplementation((callback, options) => {
                if (options.isActive) {
                    keypressCallback = callback;
                }
                else {
                    keypressCallback = () => { };
                }
            });
        });
        const simulateEscapeKeyPress = () => {
            act(() => {
                keypressCallback({ name: 'escape' });
            });
        };
        it('should cancel an in-progress stream when escape is pressed', async () => {
            const mockStream = (async function* () {
                yield { type: 'content', value: 'Part 1' };
                // Keep the stream open
                await new Promise(() => { });
            })();
            mockSendMessageStream.mockReturnValue(mockStream);
            const { result } = renderTestHook();
            // Start a query
            await act(async () => {
                // eslint-disable-next-line @typescript-eslint/no-floating-promises
                result.current.submitQuery('test query');
            });
            // Wait for the first part of the response
            await waitFor(() => {
                expect(result.current.streamingState).toBe(StreamingState.Responding);
            });
            // Simulate escape key press
            simulateEscapeKeyPress();
            // Verify cancellation message is added
            await waitFor(() => {
                expect(mockAddItem).toHaveBeenCalledWith({
                    type: MessageType.INFO,
                    text: 'Request cancelled.',
                });
            });
            // Verify state is reset
            expect(result.current.streamingState).toBe(StreamingState.Idle);
        });
        it('should call onCancelSubmit handler when escape is pressed', async () => {
            const cancelSubmitSpy = vi.fn();
            const mockStream = (async function* () {
                yield { type: 'content', value: 'Part 1' };
                // Keep the stream open
                await new Promise(() => { });
            })();
            mockSendMessageStream.mockReturnValue(mockStream);
            const { result } = renderHook(() => useGeminiStream(mockConfig.getGeminiClient(), [], mockAddItem, mockConfig, mockLoadedSettings, mockOnDebugMessage, mockHandleSlashCommand, false, () => 'vscode', () => { }, () => Promise.resolve(), false, () => { }, cancelSubmitSpy, () => { }, 80, 24));
            // Start a query
            await act(async () => {
                // eslint-disable-next-line @typescript-eslint/no-floating-promises
                result.current.submitQuery('test query');
            });
            simulateEscapeKeyPress();
            expect(cancelSubmitSpy).toHaveBeenCalledWith(false);
        });
        it('should call setShellInputFocused(false) when escape is pressed', async () => {
            const setShellInputFocusedSpy = vi.fn();
            const mockStream = (async function* () {
                yield { type: 'content', value: 'Part 1' };
                await new Promise(() => { }); // Keep stream open
            })();
            mockSendMessageStream.mockReturnValue(mockStream);
            const { result } = renderHook(() => useGeminiStream(mockConfig.getGeminiClient(), [], mockAddItem, mockConfig, mockLoadedSettings, mockOnDebugMessage, mockHandleSlashCommand, false, () => 'vscode', () => { }, () => Promise.resolve(), false, () => { }, vi.fn(), setShellInputFocusedSpy, // Pass the spy here
            80, 24));
            // Start a query
            await act(async () => {
                // eslint-disable-next-line @typescript-eslint/no-floating-promises
                result.current.submitQuery('test query');
            });
            simulateEscapeKeyPress();
            expect(setShellInputFocusedSpy).toHaveBeenCalledWith(false);
        });
        it('should not do anything if escape is pressed when not responding', () => {
            const { result } = renderTestHook();
            expect(result.current.streamingState).toBe(StreamingState.Idle);
            // Simulate escape key press
            simulateEscapeKeyPress();
            // No change should happen, no cancellation message
            expect(mockAddItem).not.toHaveBeenCalledWith(expect.objectContaining({
                text: 'Request cancelled.',
            }));
        });
        it('should prevent further processing after cancellation', async () => {
            let continueStream;
            const streamPromise = new Promise((resolve) => {
                continueStream = resolve;
            });
            const mockStream = (async function* () {
                yield { type: 'content', value: 'Initial' };
                await streamPromise; // Wait until we manually continue
                yield { type: 'content', value: ' Canceled' };
            })();
            mockSendMessageStream.mockReturnValue(mockStream);
            const { result } = renderTestHook();
            await act(async () => {
                // eslint-disable-next-line @typescript-eslint/no-floating-promises
                result.current.submitQuery('long running query');
            });
            await waitFor(() => {
                expect(result.current.streamingState).toBe(StreamingState.Responding);
            });
            // Cancel the request
            simulateEscapeKeyPress();
            // Allow the stream to continue
            await act(async () => {
                continueStream();
                // Wait a bit to see if the second part is processed
                await new Promise((resolve) => setTimeout(resolve, 50));
            });
            // The text should not have been updated with " Canceled"
            const lastCall = mockAddItem.mock.calls.find((call) => call[0].type === 'gemini');
            expect(lastCall?.[0].text).toBe('Initial');
            // The final state should be idle after cancellation
            expect(result.current.streamingState).toBe(StreamingState.Idle);
        });
        it('should cancel if a tool call is in progress', async () => {
            const toolCalls = [
                {
                    request: { callId: 'call1', name: 'tool1', args: {} },
                    status: 'executing',
                    responseSubmittedToGemini: false,
                    tool: {
                        name: 'tool1',
                        description: 'desc1',
                        build: vi.fn().mockImplementation((_) => ({
                            getDescription: () => `Mock description`,
                        })),
                    },
                    invocation: {
                        getDescription: () => `Mock description`,
                    },
                    startTime: Date.now(),
                    liveOutput: '...',
                },
            ];
            const { result } = renderTestHook(toolCalls);
            // State is `Responding` because a tool is running
            expect(result.current.streamingState).toBe(StreamingState.Responding);
            // Try to cancel
            simulateEscapeKeyPress();
            // The cancel function should be called
            expect(mockCancelAllToolCalls).toHaveBeenCalled();
        });
        it('should cancel a request when a tool is awaiting confirmation', async () => {
            const mockOnConfirm = vi.fn().mockResolvedValue(undefined);
            const toolCalls = [
                {
                    request: {
                        callId: 'confirm-call',
                        name: 'some_tool',
                        args: {},
                        isClientInitiated: false,
                        prompt_id: 'prompt-id-1',
                    },
                    status: 'awaiting_approval',
                    responseSubmittedToGemini: false,
                    tool: {
                        name: 'some_tool',
                        description: 'a tool',
                        build: vi.fn().mockImplementation((_) => ({
                            getDescription: () => `Mock description`,
                        })),
                    },
                    invocation: {
                        getDescription: () => `Mock description`,
                    },
                    confirmationDetails: {
                        type: 'edit',
                        title: 'Confirm Edit',
                        onConfirm: mockOnConfirm,
                        fileName: 'file.txt',
                        filePath: '/test/file.txt',
                        fileDiff: 'fake diff',
                        originalContent: 'old',
                        newContent: 'new',
                    },
                },
            ];
            const { result } = renderTestHook(toolCalls);
            // State is `WaitingForConfirmation` because a tool is awaiting approval
            expect(result.current.streamingState).toBe(StreamingState.WaitingForConfirmation);
            // Try to cancel
            simulateEscapeKeyPress();
            // The imperative cancel function should be called on the scheduler
            expect(mockCancelAllToolCalls).toHaveBeenCalled();
            // A cancellation message should be added to history
            await waitFor(() => {
                expect(mockAddItem).toHaveBeenCalledWith(expect.objectContaining({
                    text: 'Request cancelled.',
                }));
            });
            // The final state should be idle
            expect(result.current.streamingState).toBe(StreamingState.Idle);
        });
    });
    describe('Retry Handling', () => {
        it('should update retryStatus when CoreEvent.RetryAttempt is emitted', async () => {
            const { result } = renderHookWithDefaults();
            const retryPayload = {
                model: 'gemini-2.5-pro',
                attempt: 2,
                maxAttempts: 3,
                delayMs: 1000,
            };
            await act(async () => {
                coreEvents.emit(CoreEvent.RetryAttempt, retryPayload);
            });
            expect(result.current.retryStatus).toEqual(retryPayload);
        });
        it('should reset retryStatus when isResponding becomes false', async () => {
            const { result } = renderTestHook();
            const retryPayload = {
                model: 'gemini-2.5-pro',
                attempt: 2,
                maxAttempts: 3,
                delayMs: 1000,
            };
            // Start a query to make isResponding true
            const mockStream = (async function* () {
                yield { type: ServerGeminiEventType.Content, value: 'Part 1' };
                await new Promise(() => { }); // Keep stream open
            })();
            mockSendMessageStream.mockReturnValue(mockStream);
            await act(async () => {
                // eslint-disable-next-line @typescript-eslint/no-floating-promises
                result.current.submitQuery('test query');
            });
            await waitFor(() => {
                expect(result.current.streamingState).toBe(StreamingState.Responding);
            });
            // Emit retry event
            await act(async () => {
                coreEvents.emit(CoreEvent.RetryAttempt, retryPayload);
            });
            expect(result.current.retryStatus).toEqual(retryPayload);
            // Cancel to make isResponding false
            await act(async () => {
                result.current.cancelOngoingRequest();
            });
            expect(result.current.retryStatus).toBeNull();
        });
    });
    describe('Slash Command Handling', () => {
        it('should schedule a tool call when the command processor returns a schedule_tool action', async () => {
            const clientToolRequest = {
                type: 'schedule_tool',
                toolName: 'save_memory',
                toolArgs: { fact: 'test fact' },
            };
            mockHandleSlashCommand.mockResolvedValue(clientToolRequest);
            const { result } = renderTestHook();
            await act(async () => {
                await result.current.submitQuery('/memory add "test fact"');
            });
            await waitFor(() => {
                expect(mockScheduleToolCalls).toHaveBeenCalledWith([
                    expect.objectContaining({
                        name: 'save_memory',
                        args: { fact: 'test fact' },
                        isClientInitiated: true,
                    }),
                ], expect.any(AbortSignal));
                expect(mockSendMessageStream).not.toHaveBeenCalled();
            });
        });
        it('should stop processing and not call Gemini when a command is handled without a tool call', async () => {
            const uiOnlyCommandResult = {
                type: 'handled',
            };
            mockHandleSlashCommand.mockResolvedValue(uiOnlyCommandResult);
            const { result } = renderTestHook();
            await act(async () => {
                await result.current.submitQuery('/help');
            });
            await waitFor(() => {
                expect(mockHandleSlashCommand).toHaveBeenCalledWith('/help');
                expect(mockScheduleToolCalls).not.toHaveBeenCalled();
                expect(mockSendMessageStream).not.toHaveBeenCalled(); // No LLM call made
            });
        });
        it('should call Gemini with prompt content when slash command returns a `submit_prompt` action', async () => {
            const customCommandResult = {
                type: 'submit_prompt',
                content: 'This is the actual prompt from the command file.',
            };
            mockHandleSlashCommand.mockResolvedValue(customCommandResult);
            const { result, mockSendMessageStream: localMockSendMessageStream } = renderTestHook();
            await act(async () => {
                await result.current.submitQuery('/my-custom-command');
            });
            await waitFor(() => {
                expect(mockHandleSlashCommand).toHaveBeenCalledWith('/my-custom-command');
                expect(localMockSendMessageStream).not.toHaveBeenCalledWith('/my-custom-command', expect.anything(), expect.anything());
                expect(localMockSendMessageStream).toHaveBeenCalledWith('This is the actual prompt from the command file.', expect.any(AbortSignal), expect.any(String));
                expect(mockScheduleToolCalls).not.toHaveBeenCalled();
            });
        });
        it('should correctly handle a submit_prompt action with empty content', async () => {
            const emptyPromptResult = {
                type: 'submit_prompt',
                content: '',
            };
            mockHandleSlashCommand.mockResolvedValue(emptyPromptResult);
            const { result, mockSendMessageStream: localMockSendMessageStream } = renderTestHook();
            await act(async () => {
                await result.current.submitQuery('/emptycmd');
            });
            await waitFor(() => {
                expect(mockHandleSlashCommand).toHaveBeenCalledWith('/emptycmd');
                expect(localMockSendMessageStream).toHaveBeenCalledWith('', expect.any(AbortSignal), expect.any(String));
            });
        });
        it('should not call handleSlashCommand for line comments', async () => {
            const { result, mockSendMessageStream: localMockSendMessageStream } = renderTestHook();
            await act(async () => {
                await result.current.submitQuery('// This is a line comment');
            });
            await waitFor(() => {
                expect(mockHandleSlashCommand).not.toHaveBeenCalled();
                expect(localMockSendMessageStream).toHaveBeenCalledWith('// This is a line comment', expect.any(AbortSignal), expect.any(String));
            });
        });
        it('should not call handleSlashCommand for block comments', async () => {
            const { result, mockSendMessageStream: localMockSendMessageStream } = renderTestHook();
            await act(async () => {
                await result.current.submitQuery('/* This is a block comment */');
            });
            await waitFor(() => {
                expect(mockHandleSlashCommand).not.toHaveBeenCalled();
                expect(localMockSendMessageStream).toHaveBeenCalledWith('/* This is a block comment */', expect.any(AbortSignal), expect.any(String));
            });
        });
        it('should not call handleSlashCommand is shell mode is active', async () => {
            const { result } = renderHook(() => useGeminiStream(new MockedGeminiClientClass(mockConfig), [], mockAddItem, mockConfig, mockLoadedSettings, () => { }, mockHandleSlashCommand, true, () => 'vscode', () => { }, () => Promise.resolve(), false, () => { }, () => { }, () => { }, 80, 24));
            await act(async () => {
                await result.current.submitQuery('/about');
            });
            await waitFor(() => {
                expect(mockHandleSlashCommand).not.toHaveBeenCalled();
            });
        });
    });
    describe('Memory Refresh on save_memory', () => {
        it('should call performMemoryRefresh when a save_memory tool call completes successfully', async () => {
            const mockPerformMemoryRefresh = vi.fn();
            const completedToolCall = {
                request: {
                    callId: 'save-mem-call-1',
                    name: 'save_memory',
                    args: { fact: 'test' },
                    isClientInitiated: true,
                    prompt_id: 'prompt-id-6',
                },
                status: 'success',
                responseSubmittedToGemini: false,
                response: {
                    callId: 'save-mem-call-1',
                    responseParts: [{ text: 'Memory saved' }],
                    resultDisplay: 'Success: Memory saved',
                    error: undefined,
                    errorType: undefined, // FIX: Added missing property
                },
                tool: {
                    name: 'save_memory',
                    displayName: 'save_memory',
                    description: 'Saves memory',
                    build: vi.fn(),
                },
                invocation: {
                    getDescription: () => `Mock description`,
                },
            };
            // Capture the onComplete callback
            let capturedOnComplete = null;
            mockUseReactToolScheduler.mockImplementation((onComplete) => {
                capturedOnComplete = onComplete;
                return [[], mockScheduleToolCalls, mockMarkToolsAsSubmitted, vi.fn()];
            });
            renderHook(() => useGeminiStream(new MockedGeminiClientClass(mockConfig), [], mockAddItem, mockConfig, mockLoadedSettings, mockOnDebugMessage, mockHandleSlashCommand, false, () => 'vscode', () => { }, mockPerformMemoryRefresh, false, () => { }, () => { }, () => { }, 80, 24));
            // Trigger the onComplete callback with the completed save_memory tool
            await act(async () => {
                if (capturedOnComplete) {
                    await capturedOnComplete([completedToolCall]);
                }
            });
            await waitFor(() => {
                expect(mockPerformMemoryRefresh).toHaveBeenCalledTimes(1);
            });
        });
    });
    describe('Error Handling', () => {
        it('should call parseAndFormatApiError with the correct authType on stream initialization failure', async () => {
            // 1. Setup
            const mockError = new Error('Rate limit exceeded');
            const mockAuthType = AuthType.LOGIN_WITH_GOOGLE;
            mockParseAndFormatApiError.mockClear();
            mockSendMessageStream.mockReturnValue((async function* () {
                yield { type: 'content', value: '' };
                throw mockError;
            })());
            const testConfig = {
                ...mockConfig,
                getContentGeneratorConfig: vi.fn(() => ({
                    authType: mockAuthType,
                })),
                getModel: vi.fn(() => 'gemini-2.5-pro'),
            };
            const { result } = renderHook(() => useGeminiStream(new MockedGeminiClientClass(testConfig), [], mockAddItem, testConfig, mockLoadedSettings, mockOnDebugMessage, mockHandleSlashCommand, false, () => 'vscode', () => { }, () => Promise.resolve(), false, () => { }, () => { }, () => { }, 80, 24));
            // 2. Action
            await act(async () => {
                await result.current.submitQuery('test query');
            });
            // 3. Assertion
            await waitFor(() => {
                expect(mockParseAndFormatApiError).toHaveBeenCalledWith('Rate limit exceeded', mockAuthType, undefined, 'gemini-2.5-pro', 'gemini-2.5-flash');
            });
        });
    });
    describe('handleApprovalModeChange', () => {
        it('should auto-approve all pending tool calls when switching to YOLO mode', async () => {
            const mockOnConfirm = vi.fn().mockResolvedValue(undefined);
            const awaitingApprovalToolCalls = [
                createMockToolCall('replace', 'call1', 'edit', mockOnConfirm),
                createMockToolCall('read_file', 'call2', 'info', mockOnConfirm),
            ];
            const { result } = renderTestHook(awaitingApprovalToolCalls);
            await act(async () => {
                await result.current.handleApprovalModeChange(ApprovalMode.YOLO);
            });
            // Both tool calls should be auto-approved
            expect(mockOnConfirm).toHaveBeenCalledTimes(2);
            expect(mockOnConfirm).toHaveBeenCalledWith(ToolConfirmationOutcome.ProceedOnce);
        });
        it('should only auto-approve edit tools when switching to AUTO_EDIT mode', async () => {
            const mockOnConfirmReplace = vi.fn().mockResolvedValue(undefined);
            const mockOnConfirmWrite = vi.fn().mockResolvedValue(undefined);
            const mockOnConfirmRead = vi.fn().mockResolvedValue(undefined);
            const awaitingApprovalToolCalls = [
                createMockToolCall('replace', 'call1', 'edit', mockOnConfirmReplace),
                createMockToolCall('write_file', 'call2', 'edit', mockOnConfirmWrite),
                createMockToolCall('read_file', 'call3', 'info', mockOnConfirmRead),
            ];
            const { result } = renderTestHook(awaitingApprovalToolCalls);
            await act(async () => {
                await result.current.handleApprovalModeChange(ApprovalMode.AUTO_EDIT);
            });
            // Only replace and write_file should be auto-approved
            expect(mockOnConfirmReplace).toHaveBeenCalledWith(ToolConfirmationOutcome.ProceedOnce);
            expect(mockOnConfirmWrite).toHaveBeenCalledWith(ToolConfirmationOutcome.ProceedOnce);
            // read_file should not be auto-approved
            expect(mockOnConfirmRead).not.toHaveBeenCalled();
        });
        it('should not auto-approve any tools when switching to REQUIRE_CONFIRMATION mode', async () => {
            const mockOnConfirm = vi.fn().mockResolvedValue(undefined);
            const awaitingApprovalToolCalls = [
                createMockToolCall('replace', 'call1', 'edit', mockOnConfirm),
            ];
            const { result } = renderTestHook(awaitingApprovalToolCalls);
            await act(async () => {
                await result.current.handleApprovalModeChange(ApprovalMode.DEFAULT);
            });
            // No tools should be auto-approved
            expect(mockOnConfirm).not.toHaveBeenCalled();
        });
        it('should handle errors gracefully when auto-approving tool calls', async () => {
            const debuggerSpy = vi
                .spyOn(debugLogger, 'warn')
                .mockImplementation(() => { });
            const mockOnConfirmSuccess = vi.fn().mockResolvedValue(undefined);
            const mockOnConfirmError = vi
                .fn()
                .mockRejectedValue(new Error('Approval failed'));
            const awaitingApprovalToolCalls = [
                createMockToolCall('replace', 'call1', 'edit', mockOnConfirmSuccess),
                createMockToolCall('write_file', 'call2', 'edit', mockOnConfirmError),
            ];
            const { result } = renderTestHook(awaitingApprovalToolCalls);
            await act(async () => {
                await result.current.handleApprovalModeChange(ApprovalMode.YOLO);
            });
            // Both confirmation methods should be called
            expect(mockOnConfirmSuccess).toHaveBeenCalled();
            expect(mockOnConfirmError).toHaveBeenCalled();
            // Error should be logged
            expect(debuggerSpy).toHaveBeenCalledWith('Failed to auto-approve tool call call2:', expect.any(Error));
            debuggerSpy.mockRestore();
        });
        it('should skip tool calls without confirmationDetails', async () => {
            const awaitingApprovalToolCalls = [
                {
                    request: {
                        callId: 'call1',
                        name: 'replace',
                        args: { old_string: 'old', new_string: 'new' },
                        isClientInitiated: false,
                        prompt_id: 'prompt-id-1',
                    },
                    status: 'awaiting_approval',
                    responseSubmittedToGemini: false,
                    // No confirmationDetails
                    tool: {
                        name: 'replace',
                        displayName: 'replace',
                        description: 'Replace text',
                        build: vi.fn(),
                    },
                    invocation: {
                        getDescription: () => 'Mock description',
                    },
                },
            ];
            const { result } = renderTestHook(awaitingApprovalToolCalls);
            // Should not throw an error
            await act(async () => {
                await result.current.handleApprovalModeChange(ApprovalMode.YOLO);
            });
        });
        it('should skip tool calls without onConfirm method in confirmationDetails', async () => {
            const awaitingApprovalToolCalls = [
                {
                    request: {
                        callId: 'call1',
                        name: 'replace',
                        args: { old_string: 'old', new_string: 'new' },
                        isClientInitiated: false,
                        prompt_id: 'prompt-id-1',
                    },
                    status: 'awaiting_approval',
                    responseSubmittedToGemini: false,
                    confirmationDetails: {
                        type: 'edit',
                        title: 'Confirm Edit',
                        // No onConfirm method
                        fileName: 'file.txt',
                        filePath: '/test/file.txt',
                        fileDiff: 'fake diff',
                        originalContent: 'old',
                        newContent: 'new',
                    },
                    tool: {
                        name: 'replace',
                        displayName: 'replace',
                        description: 'Replace text',
                        build: vi.fn(),
                    },
                    invocation: {
                        getDescription: () => 'Mock description',
                    },
                },
            ];
            const { result } = renderTestHook(awaitingApprovalToolCalls);
            // Should not throw an error
            await act(async () => {
                await result.current.handleApprovalModeChange(ApprovalMode.YOLO);
            });
        });
        it('should only process tool calls with awaiting_approval status', async () => {
            const mockOnConfirmAwaiting = vi.fn().mockResolvedValue(undefined);
            const mockOnConfirmExecuting = vi.fn().mockResolvedValue(undefined);
            const mixedStatusToolCalls = [
                {
                    request: {
                        callId: 'call1',
                        name: 'replace',
                        args: { old_string: 'old', new_string: 'new' },
                        isClientInitiated: false,
                        prompt_id: 'prompt-id-1',
                    },
                    status: 'awaiting_approval',
                    responseSubmittedToGemini: false,
                    confirmationDetails: {
                        type: 'edit',
                        title: 'Confirm Edit',
                        onConfirm: mockOnConfirmAwaiting,
                        fileName: 'file.txt',
                        filePath: '/test/file.txt',
                        fileDiff: 'fake diff',
                        originalContent: 'old',
                        newContent: 'new',
                    },
                    tool: {
                        name: 'replace',
                        displayName: 'replace',
                        description: 'Replace text',
                        build: vi.fn(),
                    },
                    invocation: {
                        getDescription: () => 'Mock description',
                    },
                },
                {
                    request: {
                        callId: 'call2',
                        name: 'write_file',
                        args: { path: '/test/file.txt', content: 'content' },
                        isClientInitiated: false,
                        prompt_id: 'prompt-id-1',
                    },
                    status: 'executing',
                    responseSubmittedToGemini: false,
                    tool: {
                        name: 'write_file',
                        displayName: 'write_file',
                        description: 'Write file',
                        build: vi.fn(),
                    },
                    invocation: {
                        getDescription: () => 'Mock description',
                    },
                    startTime: Date.now(),
                    liveOutput: 'Writing...',
                },
            ];
            const { result } = renderTestHook(mixedStatusToolCalls);
            await act(async () => {
                await result.current.handleApprovalModeChange(ApprovalMode.YOLO);
            });
            // Only the awaiting_approval tool should be processed
            expect(mockOnConfirmAwaiting).toHaveBeenCalledTimes(1);
            expect(mockOnConfirmExecuting).not.toHaveBeenCalled();
        });
    });
    describe('handleFinishedEvent', () => {
        it('should add info message for MAX_TOKENS finish reason', async () => {
            // Setup mock to return a stream with MAX_TOKENS finish reason
            mockSendMessageStream.mockReturnValue((async function* () {
                yield {
                    type: ServerGeminiEventType.Content,
                    value: 'This is a truncated response...',
                };
                yield {
                    type: ServerGeminiEventType.Finished,
                    value: { reason: 'MAX_TOKENS', usageMetadata: undefined },
                };
            })());
            const { result } = renderHook(() => useGeminiStream(new MockedGeminiClientClass(mockConfig), [], mockAddItem, mockConfig, mockLoadedSettings, mockOnDebugMessage, mockHandleSlashCommand, false, () => 'vscode', () => { }, () => Promise.resolve(), false, () => { }, () => { }, () => { }, 80, 24));
            // Submit a query
            await act(async () => {
                await result.current.submitQuery('Generate long text');
            });
            // Check that the info message was added
            await waitFor(() => {
                expect(mockAddItem).toHaveBeenCalledWith({
                    type: 'info',
                    text: '⚠️  Response truncated due to token limits.',
                }, expect.any(Number));
            });
        });
        describe('ContextWindowWillOverflow event', () => {
            beforeEach(() => {
                vi.mocked(tokenLimit).mockReturnValue(100);
            });
            it.each([
                {
                    name: 'without suggestion when remaining tokens are > 75% of limit',
                    requestTokens: 20,
                    remainingTokens: 80,
                    expectedMessage: 'Sending this message (20 tokens) might exceed the remaining context window limit (80 tokens).',
                },
                {
                    name: 'with suggestion when remaining tokens are < 75% of limit',
                    requestTokens: 30,
                    remainingTokens: 70,
                    expectedMessage: 'Sending this message (30 tokens) might exceed the remaining context window limit (70 tokens). Please try reducing the size of your message or use the `/compress` command to compress the chat history.',
                },
            ])('should add message $name', async ({ requestTokens, remainingTokens, expectedMessage }) => {
                mockSendMessageStream.mockReturnValue((async function* () {
                    yield {
                        type: ServerGeminiEventType.ContextWindowWillOverflow,
                        value: {
                            estimatedRequestTokenCount: requestTokens,
                            remainingTokenCount: remainingTokens,
                        },
                    };
                })());
                const { result } = renderHookWithDefaults();
                await act(async () => {
                    await result.current.submitQuery('Test overflow');
                });
                await waitFor(() => {
                    expect(mockAddItem).toHaveBeenCalledWith({
                        type: 'info',
                        text: expectedMessage,
                    });
                });
            });
        });
        it('should call onCancelSubmit when ContextWindowWillOverflow event is received', async () => {
            const onCancelSubmitSpy = vi.fn();
            // Setup mock to return a stream with ContextWindowWillOverflow event
            mockSendMessageStream.mockReturnValue((async function* () {
                yield {
                    type: ServerGeminiEventType.ContextWindowWillOverflow,
                    value: {
                        estimatedRequestTokenCount: 100,
                        remainingTokenCount: 50,
                    },
                };
            })());
            const { result } = renderHook(() => useGeminiStream(new MockedGeminiClientClass(mockConfig), [], mockAddItem, mockConfig, mockLoadedSettings, mockOnDebugMessage, mockHandleSlashCommand, false, () => 'vscode', () => { }, () => Promise.resolve(), false, () => { }, onCancelSubmitSpy, () => { }, 80, 24));
            // Submit a query
            await act(async () => {
                await result.current.submitQuery('Test overflow');
            });
            // Check that onCancelSubmit was called
            await waitFor(() => {
                expect(onCancelSubmitSpy).toHaveBeenCalledWith(true);
            });
        });
        it.each([
            {
                reason: 'STOP',
                shouldAddMessage: false,
            },
            {
                reason: 'FINISH_REASON_UNSPECIFIED',
                shouldAddMessage: false,
            },
            {
                reason: 'SAFETY',
                message: '⚠️  Response stopped due to safety reasons.',
            },
            {
                reason: 'RECITATION',
                message: '⚠️  Response stopped due to recitation policy.',
            },
            {
                reason: 'LANGUAGE',
                message: '⚠️  Response stopped due to unsupported language.',
            },
            {
                reason: 'BLOCKLIST',
                message: '⚠️  Response stopped due to forbidden terms.',
            },
            {
                reason: 'PROHIBITED_CONTENT',
                message: '⚠️  Response stopped due to prohibited content.',
            },
            {
                reason: 'SPII',
                message: '⚠️  Response stopped due to sensitive personally identifiable information.',
            },
            {
                reason: 'OTHER',
                message: '⚠️  Response stopped for other reasons.',
            },
            {
                reason: 'MALFORMED_FUNCTION_CALL',
                message: '⚠️  Response stopped due to malformed function call.',
            },
            {
                reason: 'IMAGE_SAFETY',
                message: '⚠️  Response stopped due to image safety violations.',
            },
            {
                reason: 'UNEXPECTED_TOOL_CALL',
                message: '⚠️  Response stopped due to unexpected tool call.',
            },
        ])('should handle $reason finish reason correctly', async ({ reason, shouldAddMessage = true, message }) => {
            mockSendMessageStream.mockReturnValue((async function* () {
                yield {
                    type: ServerGeminiEventType.Content,
                    value: `Response for ${reason}`,
                };
                yield {
                    type: ServerGeminiEventType.Finished,
                    value: { reason, usageMetadata: undefined },
                };
            })());
            const { result } = renderHookWithDefaults();
            await act(async () => {
                await result.current.submitQuery(`Test ${reason}`);
            });
            if (shouldAddMessage) {
                await waitFor(() => {
                    expect(mockAddItem).toHaveBeenCalledWith({
                        type: 'info',
                        text: message,
                    }, expect.any(Number));
                });
            }
            else {
                // Verify state returns to idle without any info messages
                await waitFor(() => {
                    expect(result.current.streamingState).toBe(StreamingState.Idle);
                });
                const infoMessages = mockAddItem.mock.calls.filter((call) => call[0].type === 'info');
                expect(infoMessages).toHaveLength(0);
            }
        });
    });
    it('should flush pending text rationale before scheduling tool calls to ensure correct history order', async () => {
        const addItemOrder = [];
        let capturedOnComplete;
        const mockScheduleToolCalls = vi.fn(async (requests) => {
            addItemOrder.push('scheduleToolCalls_START');
            // Simulate tools completing and triggering onComplete immediately.
            // This mimics the behavior that caused the regression where tool results
            // were added to history during the await scheduleToolCalls(...) block.
            const tools = requests.map((r) => ({
                request: r,
                status: 'success',
                tool: { displayName: r.name, name: r.name },
                invocation: { getDescription: () => 'desc' },
                response: { responseParts: [], resultDisplay: 'done' },
                startTime: Date.now(),
                endTime: Date.now(),
            }));
            await capturedOnComplete(tools);
            addItemOrder.push('scheduleToolCalls_END');
        });
        mockAddItem.mockImplementation((item) => {
            addItemOrder.push(`addItem:${item.type}`);
        });
        // We need to capture the onComplete callback from useReactToolScheduler
        const mockUseReactToolScheduler = useReactToolScheduler;
        mockUseReactToolScheduler.mockImplementation((onComplete) => {
            capturedOnComplete = onComplete;
            return [
                [], // toolCalls
                mockScheduleToolCalls,
                vi.fn(), // markToolsAsSubmitted
                vi.fn(), // setToolCallsForDisplay
                vi.fn(), // cancelAllToolCalls
                0, // lastToolOutputTime
            ];
        });
        const { result } = renderHook(() => useGeminiStream(new MockedGeminiClientClass(mockConfig), [], mockAddItem, mockConfig, mockLoadedSettings, vi.fn(), vi.fn(), false, () => 'vscode', vi.fn(), vi.fn(), false, vi.fn(), vi.fn(), vi.fn(), 80, 24));
        const mockStream = (async function* () {
            yield {
                type: ServerGeminiEventType.Content,
                value: 'Rationale rationale.',
            };
            yield {
                type: ServerGeminiEventType.ToolCallRequest,
                value: { callId: '1', name: 'test_tool', args: {} },
            };
        })();
        mockSendMessageStream.mockReturnValue(mockStream);
        await act(async () => {
            await result.current.submitQuery('test input');
        });
        // Expectation: addItem:gemini (rationale) MUST happen before scheduleToolCalls_START
        const rationaleIndex = addItemOrder.indexOf('addItem:gemini');
        const scheduleIndex = addItemOrder.indexOf('scheduleToolCalls_START');
        const toolGroupIndex = addItemOrder.indexOf('addItem:tool_group');
        expect(rationaleIndex).toBeGreaterThan(-1);
        expect(scheduleIndex).toBeGreaterThan(-1);
        expect(toolGroupIndex).toBeGreaterThan(-1);
        // This is the core fix validation: Rationale comes before tools are even scheduled (awaited)
        expect(rationaleIndex).toBeLessThan(scheduleIndex);
        expect(rationaleIndex).toBeLessThan(toolGroupIndex);
    });
    it('should process @include commands, adding user turn after processing to prevent race conditions', async () => {
        const rawQuery = '@include file.txt Summarize this.';
        const processedQueryParts = [
            { text: 'Summarize this with content from @file.txt' },
            { text: 'File content...' },
        ];
        const userMessageTimestamp = Date.now();
        vi.spyOn(Date, 'now').mockReturnValue(userMessageTimestamp);
        handleAtCommandSpy.mockResolvedValue({
            processedQuery: processedQueryParts,
            shouldProceed: true,
        });
        const { result } = renderHook(() => useGeminiStream(mockConfig.getGeminiClient(), [], mockAddItem, mockConfig, mockLoadedSettings, mockOnDebugMessage, mockHandleSlashCommand, false, // shellModeActive
        vi.fn(), // getPreferredEditor
        vi.fn(), // onAuthError
        vi.fn(), // performMemoryRefresh
        false, // modelSwitched
        vi.fn(), // setModelSwitched
        vi.fn(), // onCancelSubmit
        vi.fn(), // setShellInputFocused
        80, // terminalWidth
        24));
        await act(async () => {
            await result.current.submitQuery(rawQuery);
        });
        expect(handleAtCommandSpy).toHaveBeenCalledWith(expect.objectContaining({
            query: rawQuery,
        }));
        expect(mockAddItem).toHaveBeenCalledWith({
            type: MessageType.USER,
            text: rawQuery,
        }, userMessageTimestamp);
        // FIX: The expectation now matches the actual call signature.
        expect(mockSendMessageStream).toHaveBeenCalledWith(processedQueryParts, // Argument 1: The parts array directly
        expect.any(AbortSignal), // Argument 2: An AbortSignal
        expect.any(String));
    });
    describe('Thought Reset', () => {
        it('should reset thought to null when starting a new prompt', async () => {
            // First, simulate a response with a thought
            mockSendMessageStream.mockReturnValue((async function* () {
                yield {
                    type: ServerGeminiEventType.Thought,
                    value: {
                        subject: 'Previous thought',
                        description: 'Old description',
                    },
                };
                yield {
                    type: ServerGeminiEventType.Content,
                    value: 'Some response content',
                };
                yield {
                    type: ServerGeminiEventType.Finished,
                    value: { reason: 'STOP', usageMetadata: undefined },
                };
            })());
            const { result } = renderHook(() => useGeminiStream(new MockedGeminiClientClass(mockConfig), [], mockAddItem, mockConfig, mockLoadedSettings, mockOnDebugMessage, mockHandleSlashCommand, false, () => 'vscode', () => { }, () => Promise.resolve(), false, () => { }, () => { }, () => { }, 80, 24));
            // Submit first query to set a thought
            await act(async () => {
                await result.current.submitQuery('First query');
            });
            // Wait for the first response to complete
            await waitFor(() => {
                expect(mockAddItem).toHaveBeenCalledWith(expect.objectContaining({
                    type: 'gemini',
                    text: 'Some response content',
                }), expect.any(Number));
            });
            // Now simulate a new response without a thought
            mockSendMessageStream.mockReturnValue((async function* () {
                yield {
                    type: ServerGeminiEventType.Content,
                    value: 'New response content',
                };
                yield {
                    type: ServerGeminiEventType.Finished,
                    value: { reason: 'STOP', usageMetadata: undefined },
                };
            })());
            // Submit second query - thought should be reset
            await act(async () => {
                await result.current.submitQuery('Second query');
            });
            // The thought should be reset to null when starting the new prompt
            // We can verify this by checking that the LoadingIndicator would not show the previous thought
            // The actual thought state is internal to the hook, but we can verify the behavior
            // by ensuring the second response doesn't show the previous thought
            await waitFor(() => {
                expect(mockAddItem).toHaveBeenCalledWith(expect.objectContaining({
                    type: 'gemini',
                    text: 'New response content',
                }), expect.any(Number));
            });
        });
        it('should memoize pendingHistoryItems', () => {
            mockUseReactToolScheduler.mockReturnValue([
                [],
                mockScheduleToolCalls,
                mockCancelAllToolCalls,
                mockMarkToolsAsSubmitted,
            ]);
            const { result, rerender } = renderHook(() => useGeminiStream(mockConfig.getGeminiClient(), [], mockAddItem, mockConfig, mockLoadedSettings, mockOnDebugMessage, mockHandleSlashCommand, false, () => 'vscode', () => { }, () => Promise.resolve(), false, () => { }, () => { }, () => { }, 80, 24));
            const firstResult = result.current.pendingHistoryItems;
            rerender();
            const secondResult = result.current.pendingHistoryItems;
            expect(firstResult).toStrictEqual(secondResult);
            const newToolCalls = [
                {
                    request: { callId: 'call1', name: 'tool1', args: {} },
                    status: 'executing',
                    tool: {
                        name: 'tool1',
                        displayName: 'tool1',
                        description: 'desc1',
                        build: vi.fn(),
                    },
                    invocation: {
                        getDescription: () => 'Mock description',
                    },
                },
            ];
            mockUseReactToolScheduler.mockReturnValue([
                newToolCalls,
                mockScheduleToolCalls,
                mockCancelAllToolCalls,
                mockMarkToolsAsSubmitted,
            ]);
            rerender();
            const thirdResult = result.current.pendingHistoryItems;
            expect(thirdResult).not.toStrictEqual(secondResult);
        });
        it('should reset thought to null when user cancels', async () => {
            // Mock a stream that yields a thought then gets cancelled
            mockSendMessageStream.mockReturnValue((async function* () {
                yield {
                    type: ServerGeminiEventType.Thought,
                    value: { subject: 'Some thought', description: 'Description' },
                };
                yield { type: ServerGeminiEventType.UserCancelled };
            })());
            const { result } = renderHook(() => useGeminiStream(new MockedGeminiClientClass(mockConfig), [], mockAddItem, mockConfig, mockLoadedSettings, mockOnDebugMessage, mockHandleSlashCommand, false, () => 'vscode', () => { }, () => Promise.resolve(), false, () => { }, () => { }, () => { }, 80, 24));
            // Submit query
            await act(async () => {
                await result.current.submitQuery('Test query');
            });
            // Verify cancellation message was added
            await waitFor(() => {
                expect(mockAddItem).toHaveBeenCalledWith(expect.objectContaining({
                    type: 'info',
                    text: 'User cancelled the request.',
                }), expect.any(Number));
            });
            // Verify state is reset to idle
            expect(result.current.streamingState).toBe(StreamingState.Idle);
        });
        it('should reset thought to null when there is an error', async () => {
            // Mock a stream that yields a thought then encounters an error
            mockSendMessageStream.mockReturnValue((async function* () {
                yield {
                    type: ServerGeminiEventType.Thought,
                    value: { subject: 'Some thought', description: 'Description' },
                };
                yield {
                    type: ServerGeminiEventType.Error,
                    value: { error: { message: 'Test error' } },
                };
            })());
            const { result } = renderHook(() => useGeminiStream(new MockedGeminiClientClass(mockConfig), [], mockAddItem, mockConfig, mockLoadedSettings, mockOnDebugMessage, mockHandleSlashCommand, false, () => 'vscode', () => { }, () => Promise.resolve(), false, () => { }, () => { }, () => { }, 80, 24));
            // Submit query
            await act(async () => {
                await result.current.submitQuery('Test query');
            });
            // Verify error message was added
            await waitFor(() => {
                expect(mockAddItem).toHaveBeenCalledWith(expect.objectContaining({
                    type: 'error',
                }), expect.any(Number));
            });
            // Verify parseAndFormatApiError was called
            expect(mockParseAndFormatApiError).toHaveBeenCalledWith({ message: 'Test error' }, expect.any(String), undefined, 'gemini-2.5-pro', 'gemini-2.5-flash');
        });
        it('should update lastOutputTime on Gemini thought and content events', async () => {
            vi.useFakeTimers();
            const startTime = 1000000;
            vi.setSystemTime(startTime);
            // Mock a stream that yields a thought then content
            mockSendMessageStream.mockReturnValue((async function* () {
                yield {
                    type: ServerGeminiEventType.Thought,
                    value: { subject: 'Thinking...', description: '' },
                };
                // Advance time for the next event
                vi.advanceTimersByTime(1000);
                yield {
                    type: ServerGeminiEventType.Content,
                    value: 'Hello',
                };
            })());
            const { result } = renderHook(() => useGeminiStream(new MockedGeminiClientClass(mockConfig), [], mockAddItem, mockConfig, mockLoadedSettings, mockOnDebugMessage, mockHandleSlashCommand, false, () => 'vscode', () => { }, () => Promise.resolve(), false, () => { }, () => { }, () => { }, 80, 24));
            // Submit query
            await act(async () => {
                await result.current.submitQuery('Test query');
            });
            // Verify lastOutputTime was updated
            // It should be the time of the last event (startTime + 1000)
            expect(result.current.lastOutputTime).toBe(startTime + 1000);
            vi.useRealTimers();
        });
    });
    describe('Loop Detection Confirmation', () => {
        beforeEach(() => {
            // Add mock for getLoopDetectionService to the config
            const mockLoopDetectionService = {
                disableForSession: vi.fn(),
            };
            mockConfig.getGeminiClient = vi.fn().mockReturnValue({
                ...new MockedGeminiClientClass(mockConfig),
                getLoopDetectionService: () => mockLoopDetectionService,
            });
        });
        it('should set loopDetectionConfirmationRequest when LoopDetected event is received', async () => {
            mockSendMessageStream.mockReturnValue((async function* () {
                yield {
                    type: ServerGeminiEventType.Content,
                    value: 'Some content',
                };
                yield {
                    type: ServerGeminiEventType.LoopDetected,
                };
            })());
            const { result } = renderTestHook();
            await act(async () => {
                await result.current.submitQuery('test query');
            });
            await waitFor(() => {
                expect(result.current.loopDetectionConfirmationRequest).not.toBeNull();
                expect(typeof result.current.loopDetectionConfirmationRequest?.onComplete).toBe('function');
            });
        });
        it('should disable loop detection and show message when user selects "disable"', async () => {
            const mockLoopDetectionService = {
                disableForSession: vi.fn(),
            };
            const mockClient = {
                ...new MockedGeminiClientClass(mockConfig),
                getLoopDetectionService: () => mockLoopDetectionService,
            };
            mockConfig.getGeminiClient = vi.fn().mockReturnValue(mockClient);
            // Mock for the initial request
            mockSendMessageStream.mockReturnValueOnce((async function* () {
                yield {
                    type: ServerGeminiEventType.LoopDetected,
                };
            })());
            // Mock for the retry request
            mockSendMessageStream.mockReturnValueOnce((async function* () {
                yield {
                    type: ServerGeminiEventType.Content,
                    value: 'Retry successful',
                };
                yield {
                    type: ServerGeminiEventType.Finished,
                    value: { reason: 'STOP' },
                };
            })());
            const { result } = renderTestHook();
            await act(async () => {
                await result.current.submitQuery('test query');
            });
            // Wait for confirmation request to be set
            await waitFor(() => {
                expect(result.current.loopDetectionConfirmationRequest).not.toBeNull();
            });
            // Simulate user selecting "disable"
            await act(async () => {
                result.current.loopDetectionConfirmationRequest?.onComplete({
                    userSelection: 'disable',
                });
            });
            // Verify loop detection was disabled
            expect(mockLoopDetectionService.disableForSession).toHaveBeenCalledTimes(1);
            // Verify confirmation request was cleared
            expect(result.current.loopDetectionConfirmationRequest).toBeNull();
            // Verify appropriate message was added
            expect(mockAddItem).toHaveBeenCalledWith({
                type: 'info',
                text: 'Loop detection has been disabled for this session. Retrying request...',
            });
            // Verify that the request was retried
            await waitFor(() => {
                expect(mockSendMessageStream).toHaveBeenCalledTimes(2);
                expect(mockSendMessageStream).toHaveBeenNthCalledWith(2, 'test query', expect.any(AbortSignal), expect.any(String));
            });
        });
        it('should keep loop detection enabled and show message when user selects "keep"', async () => {
            const mockLoopDetectionService = {
                disableForSession: vi.fn(),
            };
            const mockClient = {
                ...new MockedGeminiClientClass(mockConfig),
                getLoopDetectionService: () => mockLoopDetectionService,
            };
            mockConfig.getGeminiClient = vi.fn().mockReturnValue(mockClient);
            mockSendMessageStream.mockReturnValue((async function* () {
                yield {
                    type: ServerGeminiEventType.LoopDetected,
                };
            })());
            const { result } = renderTestHook();
            await act(async () => {
                await result.current.submitQuery('test query');
            });
            // Wait for confirmation request to be set
            await waitFor(() => {
                expect(result.current.loopDetectionConfirmationRequest).not.toBeNull();
            });
            // Simulate user selecting "keep"
            await act(async () => {
                result.current.loopDetectionConfirmationRequest?.onComplete({
                    userSelection: 'keep',
                });
            });
            // Verify loop detection was NOT disabled
            expect(mockLoopDetectionService.disableForSession).not.toHaveBeenCalled();
            // Verify confirmation request was cleared
            expect(result.current.loopDetectionConfirmationRequest).toBeNull();
            // Verify appropriate message was added
            expect(mockAddItem).toHaveBeenCalledWith({
                type: 'info',
                text: 'A potential loop was detected. This can happen due to repetitive tool calls or other model behavior. The request has been halted.',
            });
            // Verify that the request was NOT retried
            expect(mockSendMessageStream).toHaveBeenCalledTimes(1);
        });
        it('should handle multiple loop detection events properly', async () => {
            const { result } = renderTestHook();
            // First loop detection - set up fresh mock for first call
            mockSendMessageStream.mockReturnValueOnce((async function* () {
                yield {
                    type: ServerGeminiEventType.LoopDetected,
                };
            })());
            // First loop detection
            await act(async () => {
                await result.current.submitQuery('first query');
            });
            await waitFor(() => {
                expect(result.current.loopDetectionConfirmationRequest).not.toBeNull();
            });
            // Simulate user selecting "keep" for first request
            await act(async () => {
                result.current.loopDetectionConfirmationRequest?.onComplete({
                    userSelection: 'keep',
                });
            });
            expect(result.current.loopDetectionConfirmationRequest).toBeNull();
            // Verify first message was added
            expect(mockAddItem).toHaveBeenCalledWith({
                type: 'info',
                text: 'A potential loop was detected. This can happen due to repetitive tool calls or other model behavior. The request has been halted.',
            });
            // Second loop detection - set up fresh mock for second call
            mockSendMessageStream.mockReturnValueOnce((async function* () {
                yield {
                    type: ServerGeminiEventType.LoopDetected,
                };
            })());
            // Mock for the retry request
            mockSendMessageStream.mockReturnValueOnce((async function* () {
                yield {
                    type: ServerGeminiEventType.Content,
                    value: 'Retry successful',
                };
                yield {
                    type: ServerGeminiEventType.Finished,
                    value: { reason: 'STOP' },
                };
            })());
            // Second loop detection
            await act(async () => {
                await result.current.submitQuery('second query');
            });
            await waitFor(() => {
                expect(result.current.loopDetectionConfirmationRequest).not.toBeNull();
            });
            // Simulate user selecting "disable" for second request
            await act(async () => {
                result.current.loopDetectionConfirmationRequest?.onComplete({
                    userSelection: 'disable',
                });
            });
            expect(result.current.loopDetectionConfirmationRequest).toBeNull();
            // Verify second message was added
            expect(mockAddItem).toHaveBeenCalledWith({
                type: 'info',
                text: 'Loop detection has been disabled for this session. Retrying request...',
            });
            // Verify that the request was retried
            await waitFor(() => {
                expect(mockSendMessageStream).toHaveBeenCalledTimes(3); // 1st query, 2nd query, retry of 2nd query
                expect(mockSendMessageStream).toHaveBeenNthCalledWith(3, 'second query', expect.any(AbortSignal), expect.any(String));
            });
        });
        it('should process LoopDetected event after moving pending history to history', async () => {
            mockSendMessageStream.mockReturnValue((async function* () {
                yield {
                    type: ServerGeminiEventType.Content,
                    value: 'Some response content',
                };
                yield {
                    type: ServerGeminiEventType.LoopDetected,
                };
            })());
            const { result } = renderTestHook();
            await act(async () => {
                await result.current.submitQuery('test query');
            });
            // Verify that the content was added to history before the loop detection dialog
            await waitFor(() => {
                expect(mockAddItem).toHaveBeenCalledWith(expect.objectContaining({
                    type: 'gemini',
                    text: 'Some response content',
                }), expect.any(Number));
            });
            // Then verify loop detection confirmation request was set
            await waitFor(() => {
                expect(result.current.loopDetectionConfirmationRequest).not.toBeNull();
            });
        });
    });
    describe('Agent Execution Events', () => {
        it('should handle AgentExecutionStopped event with systemMessage', async () => {
            mockSendMessageStream.mockReturnValue((async function* () {
                yield {
                    type: ServerGeminiEventType.AgentExecutionStopped,
                    value: {
                        reason: 'hook-reason',
                        systemMessage: 'Custom stop message',
                    },
                };
            })());
            const { result } = renderTestHook();
            await act(async () => {
                await result.current.submitQuery('test stop');
            });
            await waitFor(() => {
                expect(mockAddItem).toHaveBeenCalledWith({
                    type: MessageType.INFO,
                    text: 'Agent execution stopped: Custom stop message',
                }, expect.any(Number));
                expect(result.current.streamingState).toBe(StreamingState.Idle);
            });
        });
        it('should handle AgentExecutionStopped event by falling back to reason when systemMessage is missing', async () => {
            mockSendMessageStream.mockReturnValue((async function* () {
                yield {
                    type: ServerGeminiEventType.AgentExecutionStopped,
                    value: { reason: 'Stopped by hook' },
                };
            })());
            const { result } = renderTestHook();
            await act(async () => {
                await result.current.submitQuery('test stop');
            });
            await waitFor(() => {
                expect(mockAddItem).toHaveBeenCalledWith({
                    type: MessageType.INFO,
                    text: 'Agent execution stopped: Stopped by hook',
                }, expect.any(Number));
                expect(result.current.streamingState).toBe(StreamingState.Idle);
            });
        });
        it('should handle AgentExecutionBlocked event with systemMessage', async () => {
            mockSendMessageStream.mockReturnValue((async function* () {
                yield {
                    type: ServerGeminiEventType.AgentExecutionBlocked,
                    value: {
                        reason: 'hook-reason',
                        systemMessage: 'Custom block message',
                    },
                };
            })());
            const { result } = renderTestHook();
            await act(async () => {
                await result.current.submitQuery('test block');
            });
            await waitFor(() => {
                expect(mockAddItem).toHaveBeenCalledWith({
                    type: MessageType.WARNING,
                    text: 'Agent execution blocked: Custom block message',
                }, expect.any(Number));
            });
        });
        it('should handle AgentExecutionBlocked event by falling back to reason when systemMessage is missing', async () => {
            mockSendMessageStream.mockReturnValue((async function* () {
                yield {
                    type: ServerGeminiEventType.AgentExecutionBlocked,
                    value: { reason: 'Blocked by hook' },
                };
            })());
            const { result } = renderTestHook();
            await act(async () => {
                await result.current.submitQuery('test block');
            });
            await waitFor(() => {
                expect(mockAddItem).toHaveBeenCalledWith({
                    type: MessageType.WARNING,
                    text: 'Agent execution blocked: Blocked by hook',
                }, expect.any(Number));
            });
        });
    });
});
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