import { logger } from '../utils/logger';

export interface MerchantProduct {
  id: string;
  merchantId: string;
  tenantId: string;
  shopId: string;
  name: string;
  description: string;
  price: number;
  stock: number;
  category: string;
  status: 'ACTIVE' | 'INACTIVE' | 'OUT_OF_STOCK';
  traceId: string;
  taskId: string;
  businessType: 'TOC' | 'TOB';
  createdAt: Date;
  updatedAt: Date;
}

export interface MerchantOrder {
  id: string;
  merchantId: string;
  tenantId: string;
  shopId: string;
  customerId: string;
  orderItems: OrderItem[];
  totalAmount: number;
  status: 'PENDING' | 'PROCESSING' | 'SHIPPED' | 'DELIVERED' | 'CANCELLED' | 'REFUNDED';
  paymentStatus: 'PENDING' | 'COMPLETED' | 'FAILED' | 'REFUNDED';
  shippingAddress: string;
  traceId: string;
  taskId: string;
  businessType: 'TOC' | 'TOB';
  createdAt: Date;
  updatedAt: Date;
}

export interface OrderItem {
  id: string;
  productId: string;
  quantity: number;
  price: number;
  total: number;
}

export interface CreateProductParams {
  merchantId: string;
  tenantId: string;
  shopId: string;
  name: string;
  description: string;
  price: number;
  stock: number;
  category: string;
  traceId: string;
  taskId: string;
  businessType: 'TOC' | 'TOB';
}

export interface CreateOrderParams {
  merchantId: string;
  tenantId: string;
  shopId: string;
  customerId: string;
  orderItems: Omit<OrderItem, 'id'>[];
  shippingAddress: string;
  traceId: string;
  taskId: string;
  businessType: 'TOC' | 'TOB';
}

export interface ProductResult {
  success: boolean;
  product: MerchantProduct;
  message: string;
}

export interface OrderResult {
  success: boolean;
  order: MerchantOrder;
  message: string;
}

export class MerchantProductOrderService {
  /**
   * 初始化数据库表
   */
  static async initTable() {
    logger.info('🚀 MerchantProductOrderService table initialized');
    // 这里可以添加数据库表初始化逻辑
  }

  /**
   * 创建商品
   */
  static async createProduct(params: CreateProductParams): Promise<ProductResult> {
    logger.info(`[MerchantProductOrderService] Creating product: ${params.name} for merchant: ${params.merchantId}`, { traceId: params.traceId });
    
    // 这里可以添加创建商品的逻辑
    
    const product: MerchantProduct = {
      id: 'product_' + Date.now(),
      merchantId: params.merchantId,
      tenantId: params.tenantId,
      shopId: params.shopId,
      name: params.name,
      description: params.description,
      price: params.price,
      stock: params.stock,
      category: params.category,
      status: 'ACTIVE',
      traceId: params.traceId,
      taskId: params.taskId,
      businessType: params.businessType,
      createdAt: new Date(),
      updatedAt: new Date()
    };
    
    return {
      success: true,
      product,
      message: 'Product created successfully'
    };
  }

  /**
   * 更新商品
   */
  static async updateProduct(productId: string, updates: Partial<CreateProductParams>, traceId: string): Promise<ProductResult> {
    logger.info(`[MerchantProductOrderService] Updating product: ${productId}`, { traceId });
    // 这里可以添加更新商品的逻辑
    
    const product: MerchantProduct = {
      id: productId,
      merchantId: updates.merchantId || 'merchant_1',
      tenantId: updates.tenantId || 'tenant_1',
      shopId: updates.shopId || 'shop_1',
      name: updates.name || 'Product',
      description: updates.description || 'Description',
      price: updates.price || 0,
      stock: updates.stock || 0,
      category: updates.category || 'General',
      status: 'ACTIVE',
      traceId,
      taskId: updates.taskId || 'task_1',
      businessType: updates.businessType || 'TOC',
      createdAt: new Date(),
      updatedAt: new Date()
    };
    
    return {
      success: true,
      product,
      message: 'Product updated successfully'
    };
  }

  /**
   * 获取商品列表
   */
  static async getProducts(merchantId: string, tenantId: string, shopId: string, traceId: string): Promise<MerchantProduct[]> {
    logger.info(`[MerchantProductOrderService] Getting products for merchant: ${merchantId}`, { traceId });
    // 这里可以添加获取商品列表的逻辑
    return [];
  }

  /**
   * 创建订单
   */
  static async createOrder(params: CreateOrderParams): Promise<OrderResult> {
    logger.info(`[MerchantProductOrderService] Creating order for merchant: ${params.merchantId}`, { traceId: params.traceId });
    
    // 这里可以添加创建订单的逻辑
    
    const orderItems: OrderItem[] = params.orderItems.map((item, index) => ({
      id: 'item_' + Date.now() + '_' + index,
      productId: item.productId,
      quantity: item.quantity,
      price: item.price,
      total: item.quantity * item.price
    }));
    
    const totalAmount = orderItems.reduce((sum, item) => sum + item.total, 0);
    
    const order: MerchantOrder = {
      id: 'order_' + Date.now(),
      merchantId: params.merchantId,
      tenantId: params.tenantId,
      shopId: params.shopId,
      customerId: params.customerId,
      orderItems,
      totalAmount,
      status: 'PENDING',
      paymentStatus: 'PENDING',
      shippingAddress: params.shippingAddress,
      traceId: params.traceId,
      taskId: params.taskId,
      businessType: params.businessType,
      createdAt: new Date(),
      updatedAt: new Date()
    };
    
    return {
      success: true,
      order,
      message: 'Order created successfully'
    };
  }

  /**
   * 更新订单状态
   */
  static async updateOrderStatus(orderId: string, status: MerchantOrder['status'], traceId: string): Promise<MerchantOrder> {
    logger.info(`[MerchantProductOrderService] Updating order status: ${orderId} to ${status}`, { traceId });
    // 这里可以添加更新订单状态的逻辑
    
    return {
      id: orderId,
      merchantId: 'merchant_1',
      tenantId: 'tenant_1',
      shopId: 'shop_1',
      customerId: 'customer_1',
      orderItems: [],
      totalAmount: 0,
      status,
      paymentStatus: 'COMPLETED',
      shippingAddress: 'Address',
      traceId,
      taskId: 'task_1',
      businessType: 'TOC',
      createdAt: new Date(),
      updatedAt: new Date()
    };
  }

  /**
   * 获取订单列表
   */
  static async getOrders(merchantId: string, tenantId: string, shopId: string, traceId: string): Promise<MerchantOrder[]> {
    logger.info(`[MerchantProductOrderService] Getting orders for merchant: ${merchantId}`, { traceId });
    // 这里可以添加获取订单列表的逻辑
    return [];
  }

  /**
   * 获取订单详情
   */
  static async getOrder(orderId: string, traceId: string): Promise<MerchantOrder | null> {
    logger.info(`[MerchantProductOrderService] Getting order: ${orderId}`, { traceId });
    // 这里可以添加获取订单详情的逻辑
    return null;
  }

  /**
   * 取消订单
   */
  static async cancelOrder(orderId: string, traceId: string): Promise<MerchantOrder> {
    logger.info(`[MerchantProductOrderService] Cancelling order: ${orderId}`, { traceId });
    // 这里可以添加取消订单的逻辑
    
    return {
      id: orderId,
      merchantId: 'merchant_1',
      tenantId: 'tenant_1',
      shopId: 'shop_1',
      customerId: 'customer_1',
      orderItems: [],
      totalAmount: 0,
      status: 'CANCELLED',
      paymentStatus: 'REFUNDED',
      shippingAddress: 'Address',
      traceId,
      taskId: 'task_1',
      businessType: 'TOC',
      createdAt: new Date(),
      updatedAt: new Date()
    };
  }
}
