/**
 * @jest-environment jsdom
 */
import { useAuthStore, initAuthStore } from '../stores/authStore';
import api from '../lib/api';

// Mock the API module
jest.mock('../lib/api', () => ({
  __esModule: true,
  default: {
    checkEmail: jest.fn(),
    requestOTP: jest.fn(),
    verifyOTP: jest.fn(),
    logout: jest.fn(),
    isAuthenticated: jest.fn(),
    getStoredUser: jest.fn(),
    getToken: jest.fn(),
  },
  setOnUnauthorizedCallback: jest.fn(),
}));

describe('Auth Store', () => {
  beforeEach(() => {
    // Reset store to initial state
    useAuthStore.setState({
      user: null,
      isLoading: false,
      isInitializing: true,
      isAuthenticated: false,
      error: null,
    });

    // Clear all mocks
    jest.clearAllMocks();

    // Clear cookies
    document.cookie = 'accessToken=; path=/; max-age=0';
  });

  describe('Initial State', () => {
    it('should have correct initial state', () => {
      const state = useAuthStore.getState();

      expect(state.user).toBeNull();
      expect(state.isLoading).toBe(false);
      expect(state.isInitializing).toBe(true);
      expect(state.isAuthenticated).toBe(false);
      expect(state.error).toBeNull();
    });
  });

  describe('checkEmail', () => {
    it('should successfully check if email exists', async () => {
      (api.checkEmail as jest.Mock).mockResolvedValue({
        ok: true,
        data: { exists: true, name: 'John Doe' },
      });

      const result = await useAuthStore.getState().checkEmail('test@example.com');

      expect(result).toEqual({ exists: true, name: 'John Doe' });
      expect(api.checkEmail).toHaveBeenCalledWith('test@example.com');
      expect(useAuthStore.getState().isLoading).toBe(false);
      expect(useAuthStore.getState().error).toBeNull();
    });

    it('should handle email check failure', async () => {
      (api.checkEmail as jest.Mock).mockResolvedValue({
        ok: false,
        error: { message: 'Network error' },
      });

      const result = await useAuthStore.getState().checkEmail('test@example.com');

      expect(result).toEqual({ exists: false });
      expect(useAuthStore.getState().isLoading).toBe(false);
    });

    it('should handle network error during email check', async () => {
      (api.checkEmail as jest.Mock).mockRejectedValue(new Error('Network error'));

      const result = await useAuthStore.getState().checkEmail('test@example.com');

      expect(result).toEqual({ exists: false });
      expect(useAuthStore.getState().error).toBe('Network error. Please check your connection.');
    });
  });

  describe('requestOtp', () => {
    it('should successfully request OTP', async () => {
      (api.requestOTP as jest.Mock).mockResolvedValue({
        ok: true,
        data: { message: 'OTP sent' },
      });

      const result = await useAuthStore.getState().requestOtp('test@example.com');

      expect(result).toEqual({ success: true });
      expect(api.requestOTP).toHaveBeenCalledWith('test@example.com');
      expect(useAuthStore.getState().isLoading).toBe(false);
      expect(useAuthStore.getState().error).toBeNull();
    });

    it('should handle OTP request failure', async () => {
      (api.requestOTP as jest.Mock).mockResolvedValue({
        ok: false,
        error: { message: 'Failed to send OTP' },
      });

      const result = await useAuthStore.getState().requestOtp('test@example.com');

      expect(result).toEqual({ success: false });
      expect(useAuthStore.getState().error).toBe('Failed to send verification code. Please try again.');
    });
  });

  describe('verifyOtp', () => {
    it('should successfully verify OTP and authenticate user', async () => {
      (api.verifyOTP as jest.Mock).mockResolvedValue({
        ok: true,
        data: {
          token: 'mock-jwt-token',
          user: {
            id: '123',
            email: 'test@example.com',
            first_name: 'John',
            last_name: 'Doe',
          },
        },
      });

      const result = await useAuthStore.getState().verifyOtp('test@example.com', '123456');

      expect(result).toBe(true);
      expect(api.verifyOTP).toHaveBeenCalledWith('test@example.com', '123456');

      const state = useAuthStore.getState();
      expect(state.isAuthenticated).toBe(true);
      expect(state.user).toEqual({
        user_id: 123,
        email: 'test@example.com',
        firstName: 'John',
        lastName: 'Doe',
        max_role: 'USER',
        privileges: '',
      });
      expect(state.error).toBeNull();
      expect(state.isLoading).toBe(false);

      // Check that cookie was set
      expect(document.cookie).toContain('accessToken=mock-jwt-token');
    });

    it('should handle invalid OTP code', async () => {
      (api.verifyOTP as jest.Mock).mockResolvedValue({
        ok: false,
        error: { message: 'Invalid code' },
      });

      const result = await useAuthStore.getState().verifyOtp('test@example.com', '000000');

      expect(result).toBe(false);
      expect(useAuthStore.getState().error).toBe('Invalid verification code. Please try again.');
      expect(useAuthStore.getState().isAuthenticated).toBe(false);
    });

    it('should handle network error during OTP verification', async () => {
      (api.verifyOTP as jest.Mock).mockRejectedValue(new Error('Network error'));

      const result = await useAuthStore.getState().verifyOtp('test@example.com', '123456');

      expect(result).toBe(false);
      expect(useAuthStore.getState().error).toBe('Network error');
    });
  });

  describe('logout', () => {
    it('should successfully logout user', async () => {
      // Set up authenticated state
      useAuthStore.setState({
        user: { user_id: 123, email: 'test@example.com' },
        isAuthenticated: true,
      });

      // Set cookie
      document.cookie = 'accessToken=test-token; path=/';

      (api.logout as jest.Mock).mockResolvedValue(undefined);

      // Mock window.location.href
      delete (window as any).location;
      (window as any).location = { href: '' };

      await useAuthStore.getState().logout();

      expect(api.logout).toHaveBeenCalled();

      const state = useAuthStore.getState();
      expect(state.user).toBeNull();
      expect(state.isAuthenticated).toBe(false);
      expect(state.error).toBeNull();

      // Check that cookie was cleared
      expect(document.cookie).not.toContain('accessToken=test-token');
    });
  });

  describe('_checkAuth', () => {
    it('should set authenticated state when user is logged in', async () => {
      (api.isAuthenticated as jest.Mock).mockResolvedValue(true);
      (api.getStoredUser as jest.Mock).mockResolvedValue({
        user_id: 123,
        email: 'test@example.com',
        firstName: 'John',
      });
      (api.getToken as jest.Mock).mockResolvedValue('mock-token');

      await useAuthStore.getState()._checkAuth();

      const state = useAuthStore.getState();
      expect(state.isAuthenticated).toBe(true);
      expect(state.user).toEqual({
        user_id: 123,
        email: 'test@example.com',
        firstName: 'John',
      });
      expect(state.isInitializing).toBe(false);
      expect(document.cookie).toContain('accessToken=mock-token');
    });

    it('should set unauthenticated state when user is not logged in', async () => {
      (api.isAuthenticated as jest.Mock).mockResolvedValue(false);

      await useAuthStore.getState()._checkAuth();

      const state = useAuthStore.getState();
      expect(state.isAuthenticated).toBe(false);
      expect(state.user).toBeNull();
      expect(state.isInitializing).toBe(false);
      expect(document.cookie).not.toContain('accessToken');
    });

    it('should handle errors during auth check', async () => {
      (api.isAuthenticated as jest.Mock).mockRejectedValue(new Error('Auth check failed'));

      await useAuthStore.getState()._checkAuth();

      const state = useAuthStore.getState();
      expect(state.isAuthenticated).toBe(false);
      expect(state.user).toBeNull();
      expect(state.error).toBe('Failed to check authentication');
    });
  });

  describe('clearError', () => {
    it('should clear error state', () => {
      useAuthStore.setState({ error: 'Some error' });

      useAuthStore.getState().clearError();

      expect(useAuthStore.getState().error).toBeNull();
    });
  });

  describe('refreshAuth', () => {
    it('should call _checkAuth', async () => {
      (api.isAuthenticated as jest.Mock).mockResolvedValue(false);

      await useAuthStore.getState().refreshAuth();

      expect(api.isAuthenticated).toHaveBeenCalled();
    });
  });

  describe('updateUser', () => {
    it('should update user profile in state', () => {
      useAuthStore.setState({
        user: {
          user_id: 123,
          email: 'test@example.com',
          firstName: 'John',
          lastName: 'Doe',
        },
      });

      useAuthStore.getState().updateUser({ firstName: 'Jane' });

      expect(useAuthStore.getState().user).toEqual({
        user_id: 123,
        email: 'test@example.com',
        firstName: 'Jane',
        lastName: 'Doe',
      });
    });

    it('should do nothing if user is null', () => {
      useAuthStore.setState({ user: null });

      useAuthStore.getState().updateUser({ firstName: 'Jane' });

      expect(useAuthStore.getState().user).toBeNull();
    });
  });

  describe('initAuthStore', () => {
    it('should initialize store and set callbacks', async () => {
      (api.isAuthenticated as jest.Mock).mockResolvedValue(false);

      initAuthStore();

      // Wait for async _checkAuth to complete
      await new Promise(resolve => setTimeout(resolve, 100));

      expect(api.isAuthenticated).toHaveBeenCalled();
    });
  });
});