import axios from 'axios';
import { RegisterData, UserData, ProductData, OrderData, AuthResponse } from '../types';

const api = axios.create({
  baseURL: '/api',
  headers: {
    'Content-Type': 'application/json',
  },
});

// Add token to requests if available
api.interceptors.request.use(
  (config) => {
    const token = localStorage.getItem('token');
    if (token) {
      config.headers.Authorization = `Bearer ${token}`;
    }
    return config;
  },
  (error) => Promise.reject(error)
);

// Handle response errors
api.interceptors.response.use(
  (response) => response,
  (error) => {
    if (error.response?.status === 401) {
      // Token expired or invalid
      localStorage.removeItem('token');
      localStorage.removeItem('user');
      window.location.href = '/login';
    }
    return Promise.reject(error);
  }
);

export function useApi() {
  return {
    // Auth
    login: async (email: string, password: string): Promise<AuthResponse> => {
      const response = await api.post<AuthResponse>('/auth/login', {
        email,
        password,
      });
      return response.data;
    },
    register: async (userData: RegisterData): Promise<AuthResponse> => {
      const response = await api.post<AuthResponse>('/auth/register', userData);
      return response.data;
    },
    getCurrentUser: async (): Promise<UserData> => {
      const response = await api.get<UserData>('/users/me');
      return response.data;
    },

    // Products
    getProducts: async (): Promise<ProductData[]> => {
      const response = await api.get<ProductData[]>('/products');
      return response.data;
    },
    getProduct: async (id: string): Promise<ProductData> => {
      const response = await api.get<ProductData>(`/products/${id}`);
      return response.data;
    },
    createProduct: async (productData: Omit<ProductData, 'id'>): Promise<ProductData> => {
      const response = await api.post<ProductData>('/products', productData);
      return response.data;
    },
    updateProduct: async (id: string, productData: Partial<ProductData>): Promise<ProductData> => {
      const response = await api.put<ProductData>(`/products/${id}`, productData);
      return response.data;
    },
    deleteProduct: async (id: string): Promise<void> => {
      await api.delete(`/products/${id}`);
    },

    // Orders
    getOrders: async (): Promise<OrderData[]> => {
      const response = await api.get<OrderData[]>('/orders');
      return response.data;
    },
    getOrder: async (id: string): Promise<OrderData> => {
      const response = await api.get<OrderData>(`/orders/${id}`);
      return response.data;
    },
    createOrder: async (orderData: Omit<OrderData, 'id'>): Promise<OrderData> => {
      const response = await api.post<OrderData>('/orders', orderData);
      return response.data;
    },
  };
}