import axios, { AxiosError } from 'axios';

// Use proxy in development (vite will forward to backend)
// In production, use VITE_API_URL
const API_BASE = import.meta.env.VITE_API_URL || '';
const API_PREFIX = import.meta.env.VITE_API_PREFIX || '/api/v1';

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

// Add auth interceptor - attach token to requests
api.interceptors.request.use((config) => {
  const token = localStorage.getItem('accessToken');
  if (token) {
    config.headers.Authorization = `Bearer ${token}`;
  }
  return config;
});

// Response interceptor - handle 401 errors
api.interceptors.response.use(
  (response) => response,
  async (error: AxiosError) => {
    if (error.response?.status === 401) {
      // Try refresh token
      const refreshToken = localStorage.getItem('refreshToken');
      if (refreshToken) {
        try {
          const response = await axios.post(`${API_BASE}${API_PREFIX}/auth/refresh`, {
            refreshToken,
          });
          const { accessToken, refreshToken: newRefresh } = response.data;
          localStorage.setItem('accessToken', accessToken);
          localStorage.setItem('refreshToken', newRefresh);

          // Retry original request
          if (error.config) {
            error.config.headers.Authorization = `Bearer ${accessToken}`;
            return axios(error.config);
          }
        } catch {
          // Refresh failed, clear tokens and redirect to login
          localStorage.removeItem('accessToken');
          localStorage.removeItem('refreshToken');
          localStorage.removeItem('user');
          localStorage.removeItem('tenant');
          window.location.href = '/login';
        }
      } else {
        // No refresh token, redirect to login
        localStorage.removeItem('accessToken');
        localStorage.removeItem('user');
        localStorage.removeItem('tenant');
        window.location.href = '/login';
      }
    }
    return Promise.reject(error);
  }
);

// Auth API
export const authApi = {
  register: (data: {
    name: string;
    ownerName: string;
    businessType: string;
    phone: string;
    pin: string;
    email?: string;
    whatsapp?: string;
  }) => api.post('/auth/register', data),

  login: (data: { phone: string; pin: string }) =>
    api.post('/auth/login', data),

  refresh: (refreshToken: string) =>
    api.post('/auth/refresh', { refreshToken }),

  changePin: (data: { currentPin: string; newPin: string }) =>
    api.post('/auth/change-pin', data),
};

// Products API
export const productsApi = {
  getAll: (params?: { category?: string; search?: string }) =>
    api.get('/products', { params }),
  getById: (id: string) => api.get(`/products/${id}`),
  create: (data: any) => api.post('/products', data),
  update: (id: string, data: any) => api.patch(`/products/${id}`, data),
  delete: (id: string) => api.delete(`/products/${id}`),
};

// Orders API
export const ordersApi = {
  getAll: (params?: { status?: string; date?: string }) =>
    api.get('/orders', { params }),
  getById: (id: string) => api.get(`/orders/${id}`),
  create: (data: any) => api.post('/orders', data),
  updateStatus: (id: string, status: string) =>
    api.patch(`/orders/${id}/status`, { status }),
};

// Customers API
export const customersApi = {
  getAll: (params?: { search?: string }) =>
    api.get('/customers', { params }),
  getById: (id: string) => api.get(`/customers/${id}`),
  create: (data: any) => api.post('/customers', data),
  update: (id: string, data: any) => api.patch(`/customers/${id}`, data),
  getFiado: (id: string) => api.get(`/customers/${id}/fiado`),
};

// Inventory API
export const inventoryApi = {
  getMovements: (params?: { productId?: string; type?: string }) =>
    api.get('/inventory/movements', { params }),
  createMovement: (data: any) => api.post('/inventory/movements', data),
  getLowStock: () => api.get('/inventory/low-stock'),
  getAlerts: () => api.get('/inventory/alerts'),
};

// Dashboard API
export const dashboardApi = {
  getStats: () => api.get('/dashboard/stats'),
  getSalesChart: (period: string) => api.get('/dashboard/sales', { params: { period } }),
  getTopProducts: () => api.get('/dashboard/top-products'),
};

// Referrals API
export const referralsApi = {
  getMyCode: () => api.get('/referrals/my-code'),
  generateCode: () => api.post('/referrals/generate-code'),
  validateCode: (code: string) => api.get(`/referrals/validate/${code}`),
  applyCode: (code: string) => api.post('/referrals/apply-code', { code }),
  getMyReferrals: () => api.get('/referrals/list'),
  getStats: () => api.get('/referrals/stats'),
  getRewards: () => api.get('/referrals/rewards'),
  getAvailableMonths: () => api.get('/referrals/rewards/available-months'),
  getDiscount: () => api.get('/referrals/discount'),
};

// CoDi/SPEI API
export const codiSpeiApi = {
  // CoDi
  generateQr: (data: { amount: number; description?: string; saleId?: string }) =>
    api.post('/codi/generate-qr', data),
  getCodiStatus: (id: string) => api.get(`/codi/status/${id}`),
  getCodiTransactions: (limit?: number) =>
    api.get('/codi/transactions', { params: { limit } }),

  // SPEI
  getClabe: () => api.get('/spei/clabe'),
  createClabe: (beneficiaryName: string) =>
    api.post('/spei/create-clabe', { beneficiaryName }),
  getSpeiTransactions: (limit?: number) =>
    api.get('/spei/transactions', { params: { limit } }),

  // Summary
  getSummary: (date?: string) =>
    api.get('/payments/summary', { params: { date } }),
};

// Invoices API (SAT/CFDI)
export const invoicesApi = {
  // Tax Config
  getTaxConfig: () => api.get('/invoices/tax-config'),
  saveTaxConfig: (data: any) => api.post('/invoices/tax-config', data),

  // Invoices
  getAll: (params?: { status?: string; from?: string; to?: string; limit?: number }) =>
    api.get('/invoices', { params }),
  getById: (id: string) => api.get(`/invoices/${id}`),
  create: (data: any) => api.post('/invoices', data),
  stamp: (id: string) => api.post(`/invoices/${id}/stamp`),
  cancel: (id: string, reason: string, uuidReplacement?: string) =>
    api.post(`/invoices/${id}/cancel`, { reason, uuidReplacement }),
  send: (id: string, email?: string) =>
    api.post(`/invoices/${id}/send`, { email }),
  getSummary: (month?: string) =>
    api.get('/invoices/summary', { params: { month } }),
};

// Marketplace API
export const marketplaceApi = {
  // Suppliers
  getSuppliers: (params?: { category?: string; zipCode?: string; search?: string; limit?: number }) =>
    api.get('/marketplace/suppliers', { params }),
  getSupplier: (id: string) => api.get(`/marketplace/suppliers/${id}`),
  getSupplierProducts: (id: string, params?: { category?: string; search?: string }) =>
    api.get(`/marketplace/suppliers/${id}/products`, { params }),
  getSupplierReviews: (id: string, params?: { limit?: number }) =>
    api.get(`/marketplace/suppliers/${id}/reviews`, { params }),

  // Orders
  createOrder: (data: any) => api.post('/marketplace/orders', data),
  getOrders: (params?: { status?: string; supplierId?: string; limit?: number }) =>
    api.get('/marketplace/orders', { params }),
  getOrder: (id: string) => api.get(`/marketplace/orders/${id}`),
  cancelOrder: (id: string, reason: string) =>
    api.put(`/marketplace/orders/${id}/cancel`, { reason }),

  // Reviews
  createReview: (data: any) => api.post('/marketplace/reviews', data),

  // Favorites
  getFavorites: () => api.get('/marketplace/favorites'),
  addFavorite: (supplierId: string) => api.post(`/marketplace/favorites/${supplierId}`),
  removeFavorite: (supplierId: string) => api.delete(`/marketplace/favorites/${supplierId}`),

  // Stats
  getStats: () => api.get('/marketplace/stats'),
};