// 好的描述
"搜索商品目录，支持按关键词、分类、价格范围筛选。返回商品名称、价格、库存状态。"

// 不好的描述
"搜索商品"

return {
  content: [{
    type: "text",
    text: "Nike Air Max (SHOE-001): 899元, 库存充足\nAdidas Ultra Boost (SHOE-002): 1299元, 无库存"
  }],
  structuredContent: {
    products: [
      { name: "Nike Air Max", sku: "SHOE-001", price: 899, inStock: true },
      { name: "Adidas Ultra Boost", sku: "SHOE-002", price: 1299, inStock: false }
    ],
    total: 42,
    page: 1
  }
};

if (!product) {
  return {
    content: [{ type: "text", text: `SKU ${sku} 不存在，请检查编号` }],
    isError: true
  };
}

import { McpServer } from "@modelcontextprotocol/sdk/server/mcp.js";
import { StdioServerTransport } from "@modelcontextprotocol/sdk/server/stdio.js";

const server = new McpServer({
  name: "my-store-server",
  version: "1.0.0"
});

// ---- 商品搜索 ----
server.tool(
  "search_products",
  "搜索商品。支持关键词、分类筛选。返回商品名、价格、库存状态。",
  {
    query: { type: "string", description: "搜索关键词" },
    category: { type: "string", description: "分类名（可选）" },
    minPrice: { type: "number", description: "最低价格（可选）" },
    maxPrice: { type: "number", description: "最高价格（可选）" },
    limit: { type: "number", description: "返回数量，默认10，最大50" }
  },
  async ({ query, category, minPrice, maxPrice, limit = 10 }) => {
    const filters: any = {};
    if (category) filters.category = category;
    if (minPrice) filters.price = { $gte: minPrice };
    if (maxPrice) filters.price = { ...filters.price, $lte: maxPrice };

    const results = await db.products.search(query, filters, Math.min(limit, 50));

    return {
      content: [{
        type: "text",
        text: JSON.stringify({
          results: results.map(p => ({
            name: p.name,
            sku: p.sku,
            price: p.price,
            currency: "CNY",
            inStock: p.inventory > 0,
            category: p.category,
            url: `https://mystore.com/product/${p.slug}`
          })),
          total: results.totalCount,
          query
        }, null, 2)
      }]
    };
  }
);

// ---- 商品详情 ----
server.tool(
  "get_product",
  "获取单个商品的完整详情，包括描述、规格、评分、库存。",
  {
    sku: { type: "string", description: "商品SKU编号" }
  },
  async ({ sku }) => {
    const product = await db.products.findBySku(sku);
    if (!product) {
      return {
        content: [{ type: "text", text: `未找到SKU: ${sku}` }],
        isError: true
      };
    }

    return {
      content: [{
        type: "text",
        text: JSON.stringify({
          name: product.name,
          sku: product.sku,
          description: product.description,
          price: product.price,
          currency: "CNY",
          brand: product.brand,
          category: product.category,
          inStock: product.inventory > 0,
          inventory: product.inventory,
          rating: product.averageRating,
          reviewCount: product.reviewCount,
          specs: product.specifications,
          images: product.images,
          url: `https://mystore.com/product/${product.slug}`
        }, null, 2)
      }]
    };
  }
);

// ---- 订单查询 ----
server.tool(
  "get_order",
  "查询订单状态和明细。需要订单号。",
  {
    orderId: { type: "string", description: "订单号" }
  },
  async ({ orderId }) => {
    const order = await db.orders.findById(orderId);
    if (!order) {
      return {
        content: [{ type: "text", text: `未找到订单: ${orderId}` }],
        isError: true
      };
    }

    return {
      content: [{
        type: "text",
        text: JSON.stringify({
          id: order.id,
          status: order.status,
          createdAt: order.createdAt,
          items: order.items.map(i => ({
            name: i.name, quantity: i.quantity, price: i.price
          })),
          total: order.total,
          shipping: {
            method: order.shippingMethod,
            trackingNumber: order.trackingNumber,
            estimatedDelivery: order.estimatedDelivery
          }
        }, null, 2)
      }]
    };
  }
);

// ---- OTR信任查询（ORBEXA集成）----
server.tool(
  "otr_verify",
  "查询商家网站的OTR信任评分。返回六维信任评估结果。",
  {
    domain: { type: "string", description: "商家域名，如 example.com" }
  },
  async ({ domain }) => {
    const response = await fetch(
      `https://${domain}/.well-known/otr/verify`
    );
    if (!response.ok) {
      return {
        content: [{ type: "text", text: `${domain} 未部署OTR协议` }],
        isError: true
      };
    }
    const otr = await response.json();
    return {
      content: [{
        type: "text",
        text: JSON.stringify({
          domain: otr.domain,
          trustScore: otr.trustScore,
          dimensions: otr.dimensions,
          badges: otr.badges,
          lastScan: otr.lastScan
        }, null, 2)
      }]
    };
  }
);

// 启动
const transport = new StdioServerTransport();
await server.connect(transport);

// 退货政策
server.resource(
  "commerce://policies/return",
  "退货政策",
  "text/markdown",
  async () => {
    return "## 退货政策\n\n- 7天无理由退货\n- 需保持原包装完好\n- 定制商品不可退";
  }
);

// 配送区域
server.resource(
  "commerce://shipping/zones",
  "配送区域",
  "application/json",
  async () => {
    const zones = await db.shippingZones.getAll();
    return JSON.stringify(zones, null, 2);
  }
);