/**
 * @license
 * Copyright 2025 Google LLC
 * SPDX-License-Identifier: Apache-2.0
 */
import { vi, describe, it, expect, beforeEach } from 'vitest';
import { checkForUpdates } from './updateCheck.js';
const getPackageJson = vi.hoisted(() => vi.fn());
vi.mock('../../utils/package.js', () => ({
    getPackageJson,
}));
const updateNotifier = vi.hoisted(() => vi.fn());
vi.mock('update-notifier', () => ({
    default: updateNotifier,
}));
describe('checkForUpdates', () => {
    beforeEach(() => {
        vi.useFakeTimers();
        vi.resetAllMocks();
        // Clear DEV environment variable before each test
        delete process.env['DEV'];
    });
    afterEach(() => {
        vi.useRealTimers();
        vi.restoreAllMocks();
    });
    it('should return null when running from source (DEV=true)', async () => {
        process.env['DEV'] = 'true';
        getPackageJson.mockResolvedValue({
            name: 'test-package',
            version: '1.0.0',
        });
        updateNotifier.mockReturnValue({
            fetchInfo: vi
                .fn()
                .mockResolvedValue({ current: '1.0.0', latest: '1.1.0' }),
        });
        const result = await checkForUpdates();
        expect(result).toBeNull();
        expect(getPackageJson).not.toHaveBeenCalled();
        expect(updateNotifier).not.toHaveBeenCalled();
    });
    it('should return null if package.json is missing', async () => {
        getPackageJson.mockResolvedValue(null);
        const result = await checkForUpdates();
        expect(result).toBeNull();
    });
    it('should return null if there is no update', async () => {
        getPackageJson.mockResolvedValue({
            name: 'test-package',
            version: '1.0.0',
        });
        updateNotifier.mockReturnValue({
            fetchInfo: vi.fn().mockResolvedValue(null),
        });
        const result = await checkForUpdates();
        expect(result).toBeNull();
    });
    it('should return a message if a newer version is available', async () => {
        getPackageJson.mockResolvedValue({
            name: 'test-package',
            version: '1.0.0',
        });
        updateNotifier.mockReturnValue({
            fetchInfo: vi
                .fn()
                .mockResolvedValue({ current: '1.0.0', latest: '1.1.0' }),
        });
        const result = await checkForUpdates();
        expect(result?.message).toContain('1.0.0 → 1.1.0');
        expect(result?.update).toEqual({ current: '1.0.0', latest: '1.1.0' });
    });
    it('should return null if the latest version is the same as the current version', async () => {
        getPackageJson.mockResolvedValue({
            name: 'test-package',
            version: '1.0.0',
        });
        updateNotifier.mockReturnValue({
            fetchInfo: vi
                .fn()
                .mockResolvedValue({ current: '1.0.0', latest: '1.0.0' }),
        });
        const result = await checkForUpdates();
        expect(result).toBeNull();
    });
    it('should return null if the latest version is older than the current version', async () => {
        getPackageJson.mockResolvedValue({
            name: 'test-package',
            version: '1.1.0',
        });
        updateNotifier.mockReturnValue({
            fetchInfo: vi
                .fn()
                .mockResolvedValue({ current: '1.1.0', latest: '1.0.0' }),
        });
        const result = await checkForUpdates();
        expect(result).toBeNull();
    });
    it('should return null if fetchInfo rejects', async () => {
        getPackageJson.mockResolvedValue({
            name: 'test-package',
            version: '1.0.0',
        });
        updateNotifier.mockReturnValue({
            fetchInfo: vi.fn().mockRejectedValue(new Error('Timeout')),
        });
        const result = await checkForUpdates();
        expect(result).toBeNull();
    });
    it('should handle errors gracefully', async () => {
        getPackageJson.mockRejectedValue(new Error('test error'));
        const result = await checkForUpdates();
        expect(result).toBeNull();
    });
    describe('nightly updates', () => {
        it('should notify for a newer nightly version when current is nightly', async () => {
            getPackageJson.mockResolvedValue({
                name: 'test-package',
                version: '1.2.3-nightly.1',
            });
            const fetchInfoMock = vi.fn().mockImplementation(({ distTag }) => {
                if (distTag === 'nightly') {
                    return Promise.resolve({
                        latest: '1.2.3-nightly.2',
                        current: '1.2.3-nightly.1',
                    });
                }
                if (distTag === 'latest') {
                    return Promise.resolve({
                        latest: '1.2.3',
                        current: '1.2.3-nightly.1',
                    });
                }
                return Promise.resolve(null);
            });
            updateNotifier.mockImplementation(({ pkg, distTag }) => ({
                fetchInfo: () => fetchInfoMock({ pkg, distTag }),
            }));
            const result = await checkForUpdates();
            expect(result?.message).toContain('1.2.3-nightly.1 → 1.2.3-nightly.2');
            expect(result?.update.latest).toBe('1.2.3-nightly.2');
        });
    });
});
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