import axios from 'axios';
import cookieService from '../services/cookieService';

// Create axios instance with default config
const API_BASE_URL = import.meta.env.VITE_API_URL || 'http://localhost:5000';
const apiClient = axios.create({
  baseURL: API_BASE_URL,
  timeout: 30000,
  headers: {
    'Content-Type': 'application/json',
  },
  withCredentials: true, // Send cookies with requests
});

// Request interceptor to add auth token
apiClient.interceptors.request.use(
  async (config) => {
    // Get token from cookie service
    const tokens = await cookieService.getAuthTokens();
    if (tokens?.accessToken) {
      config.headers.Authorization = `Bearer ${tokens.accessToken}`;
    }
    return config;
  },
  (error) => {
    return Promise.reject(error);
  }
);

// Response interceptor to handle token refresh
apiClient.interceptors.response.use(
  (response) => {
    return response;
  },
  async (error) => {
    const originalRequest = error.config;
    
    // If error is 401 and we haven't retried yet
    if (error.response?.status === 401 && !originalRequest._retry) {
      originalRequest._retry = true;
      
      try {
        // Attempt to refresh token
        // In a real implementation, you would call a refresh endpoint
        // For now, we'll just clear auth and redirect to login
        await cookieService.clearAuthTokens();
        localStorage.removeItem('token');
        window.location.href = '/login';
      } catch (refreshError) {
        // If refresh fails, clear auth and redirect to login
        await cookieService.clearAuthTokens();
        localStorage.removeItem('token');
        window.location.href = '/login';
        return Promise.reject(refreshError);
      }
    }
    
    return Promise.reject(error);
  }
);

export default apiClient;