/**
 * Lightspeed API Client
 * Supports both Retail (X-Series) and Restaurant (R-Series) APIs
 */

import axios, { AxiosInstance } from 'axios';
import type {
  LightspeedConfig,
  Product,
  ProductInventory,
  Customer,
  Sale,
  Order,
  Employee,
  Category,
  Supplier,
  Discount,
  LoyaltyProgram,
  CustomerLoyalty,
  Shop,
  Register,
  PaymentType,
  TaxCategory,
  Manufacturer,
  ApiResponse
} from '../types/index.js';

export class LightspeedClient {
  private client: AxiosInstance;
  private config: LightspeedConfig;

  constructor(config: LightspeedConfig) {
    this.config = config;
    const baseUrl = config.baseUrl || 'https://api.lightspeedapp.com/API/V3';
    
    this.client = axios.create({
      baseURL: baseUrl,
      headers: {
        'Content-Type': 'application/json',
        'Authorization': `Bearer ${config.apiKey}`
      },
      timeout: 30000
    });

    // Add response interceptor for error handling
    this.client.interceptors.response.use(
      response => response,
      error => {
        console.error('Lightspeed API Error:', error.response?.data || error.message);
        throw error;
      }
    );
  }

  private getAccountPath(): string {
    return `/Account/${this.config.accountId}`;
  }

  // ========== PRODUCTS ==========

  async getProducts(params?: { limit?: number; offset?: number; categoryID?: string }): Promise<ApiResponse<Product[]>> {
    try {
      const response = await this.client.get(`${this.getAccountPath()}/Item.json`, { params });
      return { success: true, data: response.data.Item || [] };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  async getProduct(productID: string): Promise<ApiResponse<Product>> {
    try {
      const response = await this.client.get(`${this.getAccountPath()}/Item/${productID}.json`);
      return { success: true, data: response.data.Item };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  async createProduct(product: Partial<Product>): Promise<ApiResponse<Product>> {
    try {
      const response = await this.client.post(`${this.getAccountPath()}/Item.json`, { Item: product });
      return { success: true, data: response.data.Item };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  async updateProduct(productID: string, updates: Partial<Product>): Promise<ApiResponse<Product>> {
    try {
      const response = await this.client.put(`${this.getAccountPath()}/Item/${productID}.json`, { Item: updates });
      return { success: true, data: response.data.Item };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  async deleteProduct(productID: string): Promise<ApiResponse<boolean>> {
    try {
      await this.client.delete(`${this.getAccountPath()}/Item/${productID}.json`);
      return { success: true, data: true };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  async getProductInventory(productID: string, shopID?: string): Promise<ApiResponse<ProductInventory[]>> {
    try {
      const params = shopID ? { shopID } : {};
      const response = await this.client.get(`${this.getAccountPath()}/Item/${productID}/ItemShops.json`, { params });
      return { success: true, data: response.data.ItemShop || [] };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  async updateInventory(productID: string, shopID: string, qty: number): Promise<ApiResponse<ProductInventory>> {
    try {
      const response = await this.client.put(
        `${this.getAccountPath()}/Item/${productID}/ItemShops/${shopID}.json`,
        { ItemShop: { qty } }
      );
      return { success: true, data: response.data.ItemShop };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  // ========== CUSTOMERS ==========

  async getCustomers(params?: { limit?: number; offset?: number; email?: string }): Promise<ApiResponse<Customer[]>> {
    try {
      const response = await this.client.get(`${this.getAccountPath()}/Customer.json`, { params });
      return { success: true, data: response.data.Customer || [] };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  async getCustomer(customerID: string): Promise<ApiResponse<Customer>> {
    try {
      const response = await this.client.get(`${this.getAccountPath()}/Customer/${customerID}.json`);
      return { success: true, data: response.data.Customer };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  async createCustomer(customer: Partial<Customer>): Promise<ApiResponse<Customer>> {
    try {
      const response = await this.client.post(`${this.getAccountPath()}/Customer.json`, { Customer: customer });
      return { success: true, data: response.data.Customer };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  async updateCustomer(customerID: string, updates: Partial<Customer>): Promise<ApiResponse<Customer>> {
    try {
      const response = await this.client.put(`${this.getAccountPath()}/Customer/${customerID}.json`, { Customer: updates });
      return { success: true, data: response.data.Customer };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  async deleteCustomer(customerID: string): Promise<ApiResponse<boolean>> {
    try {
      await this.client.delete(`${this.getAccountPath()}/Customer/${customerID}.json`);
      return { success: true, data: true };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  // ========== SALES ==========

  async getSales(params?: { limit?: number; offset?: number; startDate?: string; endDate?: string }): Promise<ApiResponse<Sale[]>> {
    try {
      const response = await this.client.get(`${this.getAccountPath()}/Sale.json`, { params });
      return { success: true, data: response.data.Sale || [] };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  async getSale(saleID: string): Promise<ApiResponse<Sale>> {
    try {
      const response = await this.client.get(`${this.getAccountPath()}/Sale/${saleID}.json`);
      return { success: true, data: response.data.Sale };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  async createSale(sale: Partial<Sale>): Promise<ApiResponse<Sale>> {
    try {
      const response = await this.client.post(`${this.getAccountPath()}/Sale.json`, { Sale: sale });
      return { success: true, data: response.data.Sale };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  async updateSale(saleID: string, updates: Partial<Sale>): Promise<ApiResponse<Sale>> {
    try {
      const response = await this.client.put(`${this.getAccountPath()}/Sale/${saleID}.json`, { Sale: updates });
      return { success: true, data: response.data.Sale };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  async voidSale(saleID: string): Promise<ApiResponse<Sale>> {
    try {
      const response = await this.client.put(`${this.getAccountPath()}/Sale/${saleID}.json`, { Sale: { voided: true } });
      return { success: true, data: response.data.Sale };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  // ========== ORDERS ==========

  async getOrders(params?: { limit?: number; offset?: number; status?: string }): Promise<ApiResponse<Order[]>> {
    try {
      const response = await this.client.get(`${this.getAccountPath()}/Order.json`, { params });
      return { success: true, data: response.data.Order || [] };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  async getOrder(orderID: string): Promise<ApiResponse<Order>> {
    try {
      const response = await this.client.get(`${this.getAccountPath()}/Order/${orderID}.json`);
      return { success: true, data: response.data.Order };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  async createOrder(order: Partial<Order>): Promise<ApiResponse<Order>> {
    try {
      const response = await this.client.post(`${this.getAccountPath()}/Order.json`, { Order: order });
      return { success: true, data: response.data.Order };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  async updateOrder(orderID: string, updates: Partial<Order>): Promise<ApiResponse<Order>> {
    try {
      const response = await this.client.put(`${this.getAccountPath()}/Order/${orderID}.json`, { Order: updates });
      return { success: true, data: response.data.Order };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  async deleteOrder(orderID: string): Promise<ApiResponse<boolean>> {
    try {
      await this.client.delete(`${this.getAccountPath()}/Order/${orderID}.json`);
      return { success: true, data: true };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  // ========== EMPLOYEES ==========

  async getEmployees(params?: { limit?: number; offset?: number }): Promise<ApiResponse<Employee[]>> {
    try {
      const response = await this.client.get(`${this.getAccountPath()}/Employee.json`, { params });
      return { success: true, data: response.data.Employee || [] };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  async getEmployee(employeeID: string): Promise<ApiResponse<Employee>> {
    try {
      const response = await this.client.get(`${this.getAccountPath()}/Employee/${employeeID}.json`);
      return { success: true, data: response.data.Employee };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  async createEmployee(employee: Partial<Employee>): Promise<ApiResponse<Employee>> {
    try {
      const response = await this.client.post(`${this.getAccountPath()}/Employee.json`, { Employee: employee });
      return { success: true, data: response.data.Employee };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  async updateEmployee(employeeID: string, updates: Partial<Employee>): Promise<ApiResponse<Employee>> {
    try {
      const response = await this.client.put(`${this.getAccountPath()}/Employee/${employeeID}.json`, { Employee: updates });
      return { success: true, data: response.data.Employee };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  async deleteEmployee(employeeID: string): Promise<ApiResponse<boolean>> {
    try {
      await this.client.delete(`${this.getAccountPath()}/Employee/${employeeID}.json`);
      return { success: true, data: true };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  // ========== CATEGORIES ==========

  async getCategories(params?: { limit?: number; offset?: number }): Promise<ApiResponse<Category[]>> {
    try {
      const response = await this.client.get(`${this.getAccountPath()}/Category.json`, { params });
      return { success: true, data: response.data.Category || [] };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  async getCategory(categoryID: string): Promise<ApiResponse<Category>> {
    try {
      const response = await this.client.get(`${this.getAccountPath()}/Category/${categoryID}.json`);
      return { success: true, data: response.data.Category };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  async createCategory(category: Partial<Category>): Promise<ApiResponse<Category>> {
    try {
      const response = await this.client.post(`${this.getAccountPath()}/Category.json`, { Category: category });
      return { success: true, data: response.data.Category };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  async updateCategory(categoryID: string, updates: Partial<Category>): Promise<ApiResponse<Category>> {
    try {
      const response = await this.client.put(`${this.getAccountPath()}/Category/${categoryID}.json`, { Category: updates });
      return { success: true, data: response.data.Category };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  async deleteCategory(categoryID: string): Promise<ApiResponse<boolean>> {
    try {
      await this.client.delete(`${this.getAccountPath()}/Category/${categoryID}.json`);
      return { success: true, data: true };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  // ========== SUPPLIERS ==========

  async getSuppliers(params?: { limit?: number; offset?: number }): Promise<ApiResponse<Supplier[]>> {
    try {
      const response = await this.client.get(`${this.getAccountPath()}/Vendor.json`, { params });
      return { success: true, data: response.data.Vendor || [] };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  async getSupplier(supplierID: string): Promise<ApiResponse<Supplier>> {
    try {
      const response = await this.client.get(`${this.getAccountPath()}/Vendor/${supplierID}.json`);
      return { success: true, data: response.data.Vendor };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  async createSupplier(supplier: Partial<Supplier>): Promise<ApiResponse<Supplier>> {
    try {
      const response = await this.client.post(`${this.getAccountPath()}/Vendor.json`, { Vendor: supplier });
      return { success: true, data: response.data.Vendor };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  async updateSupplier(supplierID: string, updates: Partial<Supplier>): Promise<ApiResponse<Supplier>> {
    try {
      const response = await this.client.put(`${this.getAccountPath()}/Vendor/${supplierID}.json`, { Vendor: updates });
      return { success: true, data: response.data.Vendor };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  async deleteSupplier(supplierID: string): Promise<ApiResponse<boolean>> {
    try {
      await this.client.delete(`${this.getAccountPath()}/Vendor/${supplierID}.json`);
      return { success: true, data: true };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  // ========== DISCOUNTS ==========

  async getDiscounts(params?: { limit?: number; offset?: number }): Promise<ApiResponse<Discount[]>> {
    try {
      const response = await this.client.get(`${this.getAccountPath()}/Discount.json`, { params });
      return { success: true, data: response.data.Discount || [] };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  async getDiscount(discountID: string): Promise<ApiResponse<Discount>> {
    try {
      const response = await this.client.get(`${this.getAccountPath()}/Discount/${discountID}.json`);
      return { success: true, data: response.data.Discount };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  async createDiscount(discount: Partial<Discount>): Promise<ApiResponse<Discount>> {
    try {
      const response = await this.client.post(`${this.getAccountPath()}/Discount.json`, { Discount: discount });
      return { success: true, data: response.data.Discount };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  async updateDiscount(discountID: string, updates: Partial<Discount>): Promise<ApiResponse<Discount>> {
    try {
      const response = await this.client.put(`${this.getAccountPath()}/Discount/${discountID}.json`, { Discount: updates });
      return { success: true, data: response.data.Discount };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  async deleteDiscount(discountID: string): Promise<ApiResponse<boolean>> {
    try {
      await this.client.delete(`${this.getAccountPath()}/Discount/${discountID}.json`);
      return { success: true, data: true };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  // ========== SHOPS & REGISTERS ==========

  async getShops(): Promise<ApiResponse<Shop[]>> {
    try {
      const response = await this.client.get(`${this.getAccountPath()}/Shop.json`);
      return { success: true, data: response.data.Shop || [] };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  async getShop(shopID: string): Promise<ApiResponse<Shop>> {
    try {
      const response = await this.client.get(`${this.getAccountPath()}/Shop/${shopID}.json`);
      return { success: true, data: response.data.Shop };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  async getRegisters(shopID?: string): Promise<ApiResponse<Register[]>> {
    try {
      const params = shopID ? { shopID } : {};
      const response = await this.client.get(`${this.getAccountPath()}/Register.json`, { params });
      return { success: true, data: response.data.Register || [] };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  // ========== MANUFACTURERS ==========

  async getManufacturers(): Promise<ApiResponse<Manufacturer[]>> {
    try {
      const response = await this.client.get(`${this.getAccountPath()}/Manufacturer.json`);
      return { success: true, data: response.data.Manufacturer || [] };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  async createManufacturer(name: string): Promise<ApiResponse<Manufacturer>> {
    try {
      const response = await this.client.post(`${this.getAccountPath()}/Manufacturer.json`, { Manufacturer: { name } });
      return { success: true, data: response.data.Manufacturer };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  // ========== TAX CATEGORIES ==========

  async getTaxCategories(): Promise<ApiResponse<TaxCategory[]>> {
    try {
      const response = await this.client.get(`${this.getAccountPath()}/TaxCategory.json`);
      return { success: true, data: response.data.TaxCategory || [] };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }

  // ========== PAYMENT TYPES ==========

  async getPaymentTypes(): Promise<ApiResponse<PaymentType[]>> {
    try {
      const response = await this.client.get(`${this.getAccountPath()}/PaymentType.json`);
      return { success: true, data: response.data.PaymentType || [] };
    } catch (error: any) {
      return { success: false, error: error.message, details: error.response?.data };
    }
  }
}