import api from './index';

/**
 * Register a new user
 * @param {Object} userData - User registration data
 * @returns {Promise} - Promise with registration response
 */
export const register = async (userData) => {
  try {
    const response = await api.post('/auth/register', userData);
    return response.data;
  } catch (error) {
    throw error.response?.data || { message: 'Registration failed' };
  }
};

/**
 * Login a user
 * @param {Object} credentials - User login credentials
 * @returns {Promise} - Promise with login response
 */
export const login = async (credentials) => {
  try {
    const response = await api.post('/auth/login', credentials);
    
    // Store token and user data
    if (response.data.token) {
      localStorage.setItem('token', response.data.token);
      localStorage.setItem('user', JSON.stringify(response.data.user));
    }
    
    return response.data;
  } catch (error) {
    throw error.response?.data || { message: 'Login failed' };
  }
};

/**
 * Get current user profile
 * @returns {Promise} - Promise with user profile data
 */
export const getProfile = async () => {
  try {
    const response = await api.get('/auth/profile');
    return response.data;
  } catch (error) {
    throw error.response?.data || { message: 'Failed to get profile' };
  }
};

/**
 * Logout current user
 */
export const logout = () => {
  localStorage.removeItem('token');
  localStorage.removeItem('user');
  
  // Force reload to clear any state
  if (typeof window !== 'undefined') {
    window.location.href = '/login';
  }
};

/**
 * Check if user is authenticated
 * @returns {Boolean} - True if user is authenticated
 */
export const isAuthenticated = () => {
  if (typeof window === 'undefined') return false;
  
  const token = localStorage.getItem('token');
  return !!token;
};

/**
 * Get current user data
 * @returns {Object|null} - User data or null if not authenticated
 */
export const getCurrentUser = () => {
  if (typeof window === 'undefined') return null;
  
  const userStr = localStorage.getItem('user');
  if (!userStr) return null;
  
  try {
    return JSON.parse(userStr);
  } catch (e) {
    return null;
  }
};