/**
 * @license
 * Copyright 2025 HopCode Team
 * SPDX-License-Identifier: Apache-2.0
 */
// Patch: Unset NO_COLOR at the very top before any imports
if (process.env['NO_COLOR'] !== undefined) {
    delete process.env['NO_COLOR'];
}
import { describe, it, expect, beforeEach, afterEach, vi } from 'vitest';
import { themeManager, DEFAULT_THEME, AUTO_THEME_NAME, } from './theme-manager.js';
import * as fs from 'node:fs';
import * as os from 'node:os';
import * as detectModule from './detect-terminal-theme.js';
vi.mock('node:fs');
vi.mock('node:os', async (importOriginal) => {
    const actualOs = await importOriginal();
    return {
        ...actualOs,
        homedir: vi.fn(),
        platform: vi.fn(() => 'linux'),
    };
});
vi.mock('./detect-terminal-theme.js', () => ({
    detectTerminalTheme: vi.fn(() => 'dark'),
    detectTerminalThemeAsync: vi.fn(async () => 'dark'),
}));
const validCustomTheme = {
    type: 'custom',
    name: 'MyCustomTheme',
    Background: '#000000',
    Foreground: '#ffffff',
    LightBlue: '#89BDCD',
    AccentBlue: '#3B82F6',
    AccentPurple: '#8B5CF6',
    AccentCyan: '#06B6D4',
    AccentGreen: '#3CA84B',
    AccentYellow: 'yellow',
    AccentRed: 'red',
    DiffAdded: 'green',
    DiffRemoved: 'red',
    Comment: 'gray',
    Gray: 'gray',
};
describe('ThemeManager', () => {
    beforeEach(() => {
        // Reset themeManager state. themeManager is a module-level singleton,
        // so the cached async auto-detection result would otherwise leak across
        // tests and make ordering load-bearing.
        themeManager.loadCustomThemes({});
        themeManager.setActiveTheme(DEFAULT_THEME.name);
        themeManager.cachedAutoDetection = undefined;
    });
    afterEach(() => {
        vi.restoreAllMocks();
    });
    it('should load valid custom themes', () => {
        themeManager.loadCustomThemes({ MyCustomTheme: validCustomTheme });
        expect(themeManager.getCustomThemeNames()).toContain('MyCustomTheme');
        expect(themeManager.isCustomTheme('MyCustomTheme')).toBe(true);
    });
    it('should set and get the active theme', () => {
        expect(themeManager.getActiveTheme().name).toBe(DEFAULT_THEME.name);
        themeManager.setActiveTheme('Ayu');
        expect(themeManager.getActiveTheme().name).toBe('Ayu');
    });
    it('should set and get a custom active theme', () => {
        themeManager.loadCustomThemes({ MyCustomTheme: validCustomTheme });
        themeManager.setActiveTheme('MyCustomTheme');
        expect(themeManager.getActiveTheme().name).toBe('MyCustomTheme');
    });
    it('should return false when setting a non-existent theme', () => {
        expect(themeManager.setActiveTheme('NonExistentTheme')).toBe(false);
        expect(themeManager.getActiveTheme().name).toBe(DEFAULT_THEME.name);
    });
    it('should list available themes including custom themes', () => {
        themeManager.loadCustomThemes({ MyCustomTheme: validCustomTheme });
        const available = themeManager.getAvailableThemes();
        expect(available.some((t) => t.name === 'MyCustomTheme' && t.isCustom)).toBe(true);
    });
    it('should get a theme by name', () => {
        expect(themeManager.getTheme('Ayu')).toBeDefined();
        themeManager.loadCustomThemes({ MyCustomTheme: validCustomTheme });
        expect(themeManager.getTheme('MyCustomTheme')).toBeDefined();
    });
    it('should fall back to default theme if active theme is invalid', () => {
        themeManager.activeTheme = {
            name: 'NonExistent',
            type: 'custom',
        };
        expect(themeManager.getActiveTheme().name).toBe(DEFAULT_THEME.name);
    });
    it('should return NoColorTheme if NO_COLOR is set', () => {
        const original = process.env['NO_COLOR'];
        process.env['NO_COLOR'] = '1';
        expect(themeManager.getActiveTheme().name).toBe('NoColor');
        if (original === undefined) {
            delete process.env['NO_COLOR'];
        }
        else {
            process.env['NO_COLOR'] = original;
        }
    });
    describe('auto theme detection', () => {
        it('should select HopCode Dark when terminal is detected as dark', () => {
            vi.mocked(detectModule.detectTerminalTheme).mockReturnValue('dark');
            const result = themeManager.setActiveTheme(AUTO_THEME_NAME);
            expect(result).toBe(true);
            expect(themeManager.getActiveTheme().name).toBe('HopCode Dark');
        });
        it('should select HopCode Light when terminal is detected as light', () => {
            vi.mocked(detectModule.detectTerminalTheme).mockReturnValue('light');
            const result = themeManager.setActiveTheme(AUTO_THEME_NAME);
            expect(result).toBe(true);
            expect(themeManager.getActiveTheme().name).toBe('HopCode Light');
        });
        it('should always return true for auto theme', () => {
            expect(themeManager.setActiveTheme(AUTO_THEME_NAME)).toBe(true);
        });
        it('should resolve async auto theme with HopCode Light for light', async () => {
            vi.mocked(detectModule.detectTerminalThemeAsync).mockResolvedValue('light');
            await themeManager.resolveAutoThemeAsync();
            expect(themeManager.getActiveTheme().name).toBe('HopCode Light');
        });
        it('should resolve async auto theme with HopCode Dark for dark', async () => {
            vi.mocked(detectModule.detectTerminalThemeAsync).mockResolvedValue('dark');
            await themeManager.resolveAutoThemeAsync();
            expect(themeManager.getActiveTheme().name).toBe('HopCode Dark');
        });
        it('should reuse the async-detected value when auto is re-selected', async () => {
            // Startup: async probe (e.g. OSC 11) reports light.
            vi.mocked(detectModule.detectTerminalThemeAsync).mockResolvedValue('light');
            await themeManager.resolveAutoThemeAsync();
            expect(themeManager.getActiveTheme().name).toBe('HopCode Light');
            // User switches to another theme via /theme.
            themeManager.setActiveTheme('Ayu');
            expect(themeManager.getActiveTheme().name).toBe('Ayu');
            // Switching back to Auto must not regress: even if the sync detector
            // disagrees (OSC 11 is unavailable in-session), the cached async
            // result wins so the preview stays consistent with startup.
            vi.mocked(detectModule.detectTerminalTheme).mockReturnValue('dark');
            themeManager.setActiveTheme(AUTO_THEME_NAME);
            expect(themeManager.getActiveTheme().name).toBe('HopCode Light');
            expect(detectModule.detectTerminalTheme).not.toHaveBeenCalled();
        });
    });
    describe('when loading a theme from a file', () => {
        const mockThemePath = './my-theme.json';
        const mockTheme = {
            ...validCustomTheme,
            name: 'My File Theme',
        };
        beforeEach(() => {
            vi.mocked(os.homedir).mockReturnValue('/home/user');
            vi.spyOn(fs, 'realpathSync').mockImplementation((p) => p);
        });
        it('should load a theme from a valid file path', () => {
            vi.spyOn(fs, 'existsSync').mockReturnValue(true);
            vi.spyOn(fs, 'readFileSync').mockReturnValue(JSON.stringify(mockTheme));
            const result = themeManager.setActiveTheme('/home/user/my-theme.json');
            expect(result).toBe(true);
            const activeTheme = themeManager.getActiveTheme();
            expect(activeTheme.name).toBe('My File Theme');
            expect(fs.readFileSync).toHaveBeenCalledWith(expect.stringContaining('my-theme.json'), 'utf-8');
        });
        it('should not load a theme if the file does not exist', () => {
            vi.spyOn(fs, 'existsSync').mockReturnValue(false);
            const result = themeManager.setActiveTheme(mockThemePath);
            expect(result).toBe(false);
            expect(themeManager.getActiveTheme().name).toBe(DEFAULT_THEME.name);
        });
        it('should not load a theme from a file with invalid JSON', () => {
            vi.spyOn(fs, 'existsSync').mockReturnValue(true);
            vi.spyOn(fs, 'readFileSync').mockReturnValue('invalid json');
            const result = themeManager.setActiveTheme(mockThemePath);
            expect(result).toBe(false);
            expect(themeManager.getActiveTheme().name).toBe(DEFAULT_THEME.name);
        });
        it('should not load a theme from an untrusted file path', () => {
            vi.spyOn(fs, 'existsSync').mockReturnValue(true);
            vi.spyOn(fs, 'readFileSync').mockReturnValue(JSON.stringify(mockTheme));
            const result = themeManager.setActiveTheme('/untrusted/my-theme.json');
            expect(result).toBe(false);
            expect(themeManager.getActiveTheme().name).toBe(DEFAULT_THEME.name);
        });
    });
});
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