import axios from 'axios';
import toast from 'react-hot-toast';

const api = axios.create({
  baseURL: import.meta.env.VITE_API_URL || '',
  headers: { 'Content-Type': 'application/json' },
  timeout: 15000,
});

// Auto-attach JWT token
api.interceptors.request.use((config) => {
  const token = localStorage.getItem('token');
  if (token) {
    config.headers.Authorization = `Bearer ${token}`;
  }
  return config;
});

// Handle 401 (expired/invalid token)
api.interceptors.response.use(
  (response) => response,
  (error) => {
    if (error.response?.status === 401 && !window.location.pathname.startsWith('/login')) {
      const code = error.response?.data?.code;
      localStorage.removeItem('token');
      localStorage.removeItem('user');

      if (code === 'SESSION_EXPIRED') {
        // Kasir diambil alih perangkat lain
        toast.error('⚠️ Sesi Anda diambil alih perangkat lain. Silakan login ulang.', {
          duration: 5000,
          id: 'session-expired',
        });
        setTimeout(() => { window.location.href = '/login'; }, 1500);
      } else {
        window.location.href = '/login';
      }
    }
    return Promise.reject(error);
  }
);

export default api;