import axios from 'axios';

const api = axios.create({
  baseURL: process.env.NEXT_PUBLIC_ADMIN_API_URL || 'http://localhost:3004/api',
  headers: { 'Content-Type': 'application/json' },
});

api.interceptors.request.use((config) => {
  if (typeof window !== 'undefined') {
    const token = localStorage.getItem('admin_access_token');
    if (token) {
      config.headers.Authorization = `Bearer ${token}`;
    }
  }
  return config;
});

api.interceptors.response.use(
  (response) => response,
  async (error) => {
    const originalRequest = error.config;

    if (error.response?.status === 401 && !originalRequest._retry) {
      originalRequest._retry = true;

      const refreshToken = localStorage.getItem('admin_refresh_token');
      if (!refreshToken) return Promise.reject(error);

      try {
        const res = await axios.post(
          `${process.env.NEXT_PUBLIC_ADMIN_API_URL || 'http://localhost:3004/api'}/auth/refresh`,
          { refreshToken },
        );

        const { accessToken, refreshToken: newRefreshToken } = res.data.data;
        localStorage.setItem('admin_access_token', accessToken);
        localStorage.setItem('admin_refresh_token', newRefreshToken);

        originalRequest.headers.Authorization = `Bearer ${accessToken}`;
        return api(originalRequest);
      } catch {
        localStorage.removeItem('admin_access_token');
        localStorage.removeItem('admin_refresh_token');
        if (typeof window !== 'undefined') {
          window.location.href = '/login';
        }
        return Promise.reject(error);
      }
    }

    return Promise.reject(error);
  },
);

export default api;