const IntroScreen = require('../../src/js/screens/intro');

describe('IntroScreen', () => {
    let introScreen;

    beforeEach(() => {
        introScreen = new IntroScreen();
    });

    describe('constructor', () => {
        it('should initialize with correct default values', () => {
            expect(introScreen.title).toBe('WINGS88');
            expect(introScreen.credits).toBe('A RetroWeb Games Production');
            expect(introScreen.instructions).toBe('Use arrow keys to fly\nPress SPACE to start');
            expect(introScreen.options).toEqual(['Start Game', 'Instructions', 'Quit']);
            expect(introScreen.selectedOption).toBe(0);
            expect(introScreen.audioContext).toBeNull();
            expect(introScreen.musicTrack).toBeNull();
        });
    });

    describe('moveSelection', () => {
        it('should move selection up', () => {
            introScreen.selectedOption = 1;
            // Mock render to prevent DOM access
            introScreen.render = jest.fn();
            introScreen.moveSelection(-1);
            expect(introScreen.selectedOption).toBe(0);
            expect(introScreen.render).toHaveBeenCalled();
        });

        it('should move selection down', () => {
            introScreen.selectedOption = 0;
            // Mock render to prevent DOM access
            introScreen.render = jest.fn();
            introScreen.moveSelection(1);
            expect(introScreen.selectedOption).toBe(1);
            expect(introScreen.render).toHaveBeenCalled();
        });

        it('should wrap around from last to first', () => {
            introScreen.selectedOption = 2;
            // Mock render to prevent DOM access
            introScreen.render = jest.fn();
            introScreen.moveSelection(1);
            expect(introScreen.selectedOption).toBe(0);
            expect(introScreen.render).toHaveBeenCalled();
        });

        it('should wrap around from first to last', () => {
            introScreen.selectedOption = 0;
            // Mock render to prevent DOM access
            introScreen.render = jest.fn();
            introScreen.moveSelection(-1);
            expect(introScreen.selectedOption).toBe(2);
            expect(introScreen.render).toHaveBeenCalled();
        });
    });

    describe('selectOption', () => {
        it('should handle Start Game selection', () => {
            introScreen.selectedOption = 0;
            const logSpy = jest.spyOn(console, 'log');
            introScreen.selectOption();
            expect(logSpy).toHaveBeenCalledWith('Starting game...');
            logSpy.mockRestore();
        });

        it('should handle Instructions selection', () => {
            introScreen.selectedOption = 1;
            const logSpy = jest.spyOn(console, 'log');
            introScreen.selectOption();
            expect(logSpy).toHaveBeenCalledWith('Showing instructions...');
            logSpy.mockRestore();
        });

        it('should handle Quit selection', () => {
            introScreen.selectedOption = 2;
            const logSpy = jest.spyOn(console, 'log');
            introScreen.selectOption();
            expect(logSpy).toHaveBeenCalledWith('Quitting game...');
            logSpy.mockRestore();
        });
    });
});