import { ILogger, Inject, Provide } from '@midwayjs/core';
import { ShopyyAdapter } from '../adapter/shopyy.adapter';
import { WooCommerceAdapter } from '../adapter/woocommerce.adapter';
import { ISiteAdapter } from '../interface/site-adapter.interface';
import { ShopyyService } from './shopyy.service';
import { SiteService } from './site.service';
import { WPService } from './wp.service';
import { ProductService } from './product.service';
import { UnifiedProductDTO } from '../dto/site-api.dto';
import { Product } from '../entity/product.entity';

@Provide()
export class SiteApiService {
  @Inject()
  siteService: SiteService;

  @Inject()
  wpService: WPService;

  @Inject()
  shopyyService: ShopyyService;

  @Inject()
  productService: ProductService;

  @Inject()
  logger: ILogger;

  async getAdapter(siteId: number): Promise<ISiteAdapter> {
    const site = await this.siteService.get(siteId, true);
    if (!site) {
      throw new Error(`Site ${siteId} not found`);
    }

    if (site.type === 'woocommerce') {
      if (!site?.consumerKey || !site.consumerSecret || !site.apiUrl) {
        throw new Error('站点配置缺少 consumerKey/consumerSecret/apiUrl');
      }
      return new WooCommerceAdapter(site, this.wpService);
    } else if (site.type === 'shopyy') {
      if (!site?.token) {
        throw new Error('站点配置缺少 token');
      }
      return new ShopyyAdapter(site, this.shopyyService);
    }

    throw new Error(`Unsupported site type: ${site.type}`);
  }

  /**
   * 获取站点商品并关联ERP产品信息
   * @param siteId 站点ID
   * @param siteProduct 站点商品信息
   * @returns 包含ERP产品信息的站点商品
   */
  async enrichSiteProductWithErpInfo(siteId: number, siteProduct: UnifiedProductDTO): Promise<UnifiedProductDTO & { erpProduct?: Product }> {
    if (!siteProduct || !siteProduct.sku) {
      return siteProduct;
    }

    try {
      // 使用站点SKU查询对应的ERP产品
      const erpProduct = await this.productService.findProductBySiteSku(siteProduct.sku);

      // 将ERP产品信息合并到站点商品中
      return {
        ...siteProduct,
        erpProduct,
      };
    } catch (error) {
      // 如果找不到对应的ERP产品，返回原始站点商品
      console.warn(`未找到站点SKU ${siteProduct.sku} 对应的ERP产品: ${error.message}`);
      return siteProduct;
    }
  }

  /**
   * 批量获取站点商品并关联ERP产品信息
   * @param siteId 站点ID
   * @param siteProducts 站点商品列表
   * @returns 包含ERP产品信息的站点商品列表
   */
  async enrichSiteProductsWithErpInfo(siteId: number, siteProducts: UnifiedProductDTO[]): Promise<(UnifiedProductDTO & { erpProduct?: Product })[]> {
    if (!siteProducts || !siteProducts.length) {
      return siteProducts;
    }

    // 并行处理所有商品
    const enrichedProducts = await Promise.all(
      siteProducts.map(product => this.enrichSiteProductWithErpInfo(siteId, product))
    );

    return enrichedProducts;
  }

  /**
   * 更新或创建产品
   * @param siteId 站点ID
   * @param product 产品数据
   * @returns 更新或创建后的产品
   */
  async upsertProduct(siteId: number, product: Partial<UnifiedProductDTO>): Promise<any> {
    const adapter = await this.getAdapter(siteId);

    // 首先尝试查找产品
    if (!product.sku) {
      throw new Error('产品SKU不能为空');
    }
    // 尝试搜索具有相同SKU的产品
    let existingProduct
    try {
      
      existingProduct = await adapter.getProduct({ sku: product.sku });
    } catch (error) {
      this.logger.error(`[Site API] 查找产品失败, siteId: ${siteId}, sku: ${product.sku}, 错误信息: ${error.message}`);
      existingProduct = null
    }
    if (existingProduct) {
      // 找到现有产品，更新它
      return await adapter.updateProduct({ id: existingProduct.id }, product);
    }
    // 产品不存在，执行创建
    return await adapter.createProduct(product);

  }

  /**
   * 批量更新或创建产品
   * @param siteId 站点ID
   * @param products 产品数据数组
   * @returns 批量操作结果
   */
  async batchUpsertProduct(siteId: number, products: Partial<UnifiedProductDTO>[]): Promise<{ created: any[], updated: any[], errors: any[] }> {
    const results = {
      created: [],
      updated: [],
      errors: []
    };

    for (const product of products) {
      try {
        const result = await this.upsertProduct(siteId, product);
        // 判断是创建还是更新
        if (result && result.id) {
          // 简单判断:如果产品原本没有ID而现在有了，说明是创建的
          if (!product.id || !product.id.toString().trim()) {
            results.created.push(result);
          } else {
            results.updated.push(result);
          }
        }
      } catch (error) {
        results.errors.push({
          product: product,
          error: error.message
        });
      }
    }

    return results;
  }

  /**
   * 从站点获取产品
   * @param siteId 站点ID
   * @param params 查询参数
   * @returns 站点产品列表
   */
  async getProductsFromSite(siteId: number, params?: any): Promise<any> {
    const adapter = await this.getAdapter(siteId);
    return await adapter.getProducts(params);
  }

  /**
   * 从站点获取所有产品
   * @param siteId 站点ID
   * @param params 查询参数
   * @returns 站点产品列表
   */
  async getAllProductsFromSite(siteId: number, params?: any): Promise<any[]> {
    const adapter = await this.getAdapter(siteId);
    return await adapter.getAllProducts(params);
  }
}