/**
 * @license
 * Copyright 2025 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
import { describe, it, expect, vi, beforeEach, afterEach } from 'vitest';
import { appEvents, AppEvent } from '../../utils/events.js';
import { profiler, ACTION_TIMESTAMP_CAPACITY, FRAME_TIMESTAMP_CAPACITY, } from './DebugProfiler.js';
import { FixedDeque } from 'mnemonist';
describe('DebugProfiler', () => {
    beforeEach(() => {
        vi.useFakeTimers();
        profiler.numFrames = 0;
        profiler.totalIdleFrames = 0;
        profiler.lastFrameStartTime = 0;
        profiler.openedDebugConsole = false;
        profiler.lastActionTimestamp = 0;
        profiler.possiblyIdleFrameTimestamps = new FixedDeque(Array, FRAME_TIMESTAMP_CAPACITY);
        profiler.actionTimestamps = new FixedDeque(Array, ACTION_TIMESTAMP_CAPACITY);
    });
    afterEach(() => {
        vi.restoreAllMocks();
        profiler.actionTimestamps.clear();
        profiler.possiblyIdleFrameTimestamps.clear();
    });
    it('should not exceed action timestamp capacity', () => {
        for (let i = 0; i < ACTION_TIMESTAMP_CAPACITY + 10; i++) {
            profiler.reportAction();
            // To ensure we don't trigger the debounce
            profiler.lastActionTimestamp = 0;
        }
        expect(profiler.actionTimestamps.size).toBe(ACTION_TIMESTAMP_CAPACITY);
    });
    it('should not exceed frame timestamp capacity', () => {
        for (let i = 0; i < FRAME_TIMESTAMP_CAPACITY + 10; i++) {
            profiler.reportFrameRendered();
            // To ensure we don't trigger the debounce
            profiler.lastFrameStartTime = 0;
        }
        expect(profiler.possiblyIdleFrameTimestamps.size).toBe(FRAME_TIMESTAMP_CAPACITY);
    });
    it('should drop oldest action timestamps when capacity is reached', () => {
        for (let i = 0; i < ACTION_TIMESTAMP_CAPACITY; i++) {
            profiler.actionTimestamps.push(i);
        }
        profiler.lastActionTimestamp = 0;
        profiler.reportAction();
        expect(profiler.actionTimestamps.size).toBe(ACTION_TIMESTAMP_CAPACITY);
        expect(profiler.actionTimestamps.peekFirst()).toBe(1);
    });
    it('should drop oldest frame timestamps when capacity is reached', () => {
        for (let i = 0; i < FRAME_TIMESTAMP_CAPACITY; i++) {
            profiler.possiblyIdleFrameTimestamps.push(i);
        }
        profiler.lastFrameStartTime = 0;
        profiler.reportFrameRendered();
        expect(profiler.possiblyIdleFrameTimestamps.size).toBe(FRAME_TIMESTAMP_CAPACITY);
        expect(profiler.possiblyIdleFrameTimestamps.peekFirst()).toBe(1);
    });
    it('should not report frames as idle if an action happens shortly after', async () => {
        const startTime = Date.now();
        vi.setSystemTime(startTime);
        for (let i = 0; i < 5; i++) {
            profiler.reportFrameRendered();
            vi.advanceTimersByTime(20);
        }
        vi.setSystemTime(startTime + 400);
        profiler.reportAction();
        vi.advanceTimersByTime(600);
        profiler.checkForIdleFrames();
        expect(profiler.totalIdleFrames).toBe(0);
    });
    it('should report frames as idle if no action happens nearby', async () => {
        const startTime = Date.now();
        vi.setSystemTime(startTime);
        for (let i = 0; i < 5; i++) {
            profiler.reportFrameRendered();
            vi.advanceTimersByTime(20);
        }
        vi.advanceTimersByTime(1000);
        profiler.checkForIdleFrames();
        expect(profiler.totalIdleFrames).toBe(5);
    });
    it('should not report frames as idle if an action happens shortly before', async () => {
        const startTime = Date.now();
        vi.setSystemTime(startTime);
        profiler.reportAction();
        vi.advanceTimersByTime(400);
        for (let i = 0; i < 5; i++) {
            profiler.reportFrameRendered();
            vi.advanceTimersByTime(20);
        }
        vi.advanceTimersByTime(600);
        profiler.checkForIdleFrames();
        expect(profiler.totalIdleFrames).toBe(0);
    });
    it('should correctly identify mixed idle and non-idle frames', async () => {
        const startTime = Date.now();
        vi.setSystemTime(startTime);
        for (let i = 0; i < 3; i++) {
            profiler.reportFrameRendered();
            vi.advanceTimersByTime(20);
        }
        vi.advanceTimersByTime(1000);
        profiler.reportAction();
        vi.advanceTimersByTime(100);
        for (let i = 0; i < 3; i++) {
            profiler.reportFrameRendered();
            vi.advanceTimersByTime(20);
        }
        vi.advanceTimersByTime(600);
        profiler.checkForIdleFrames();
        expect(profiler.totalIdleFrames).toBe(3);
    });
    it('should report flicker frames', () => {
        const reportActionSpy = vi.spyOn(profiler, 'reportAction');
        const cleanup = profiler.registerFlickerHandler(true);
        appEvents.emit(AppEvent.Flicker);
        expect(profiler.totalFlickerFrames).toBe(1);
        expect(reportActionSpy).toHaveBeenCalled();
        cleanup();
    });
    it('should not report idle frames when actions are interleaved', async () => {
        const startTime = Date.now();
        vi.setSystemTime(startTime);
        profiler.reportFrameRendered();
        vi.advanceTimersByTime(20);
        profiler.reportFrameRendered();
        vi.advanceTimersByTime(200);
        profiler.reportAction();
        vi.advanceTimersByTime(200);
        profiler.reportFrameRendered();
        vi.advanceTimersByTime(20);
        profiler.reportFrameRendered();
        vi.advanceTimersByTime(600);
        profiler.checkForIdleFrames();
        expect(profiler.totalIdleFrames).toBe(0);
    });
});
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