const sqlite3 = require('sqlite3').verbose();
const db = new sqlite3.Database('./data/cashier.db');

db.serialize(() => {
  // 插入订单项数据
  // 获取订单ID
  db.get("SELECT id FROM orders WHERE order_no = 'T001'", (err, row) => {
    if (err) {
      console.error('查询订单ID失败:', err);
      db.close();
      return;
    }
    
    if (!row) {
      console.log('未找到订单T001');
      db.close();
      return;
    }
    
    const orderId = row.id;
    console.log('订单T001的ID:', orderId);
    
    // 检查是否已存在订单项
    db.get("SELECT COUNT(*) as count FROM order_items WHERE order_id = ?", [orderId], (err, row) => {
      if (err) {
        console.error('查询订单项失败:', err);
        db.close();
        return;
      }
      
      if (row.count > 0) {
        console.log('订单项已存在，跳过插入');
        db.close();
        return;
      }
      
      // 插入订单项
      const orderItems = [
        { order_id: orderId, product_id: 1, quantity: 2, unit_price: 3.5, total_price: 7.0 }, // 可口可乐 x2
        { order_id: orderId, product_id: 4, quantity: 1, unit_price: 5, total_price: 5.0 },   // 旺旺雪饼 x1
        { order_id: orderId, product_id: 8, quantity: 1, unit_price: 8.5, total_price: 8.5 }  // 舒肤佳香皂 x1
      ];
      
      const itemStmt = db.prepare('INSERT INTO order_items (order_id, product_id, quantity, unit_price, total_price, discount_amount, created_at) VALUES (?, ?, ?, ?, ?, 0, "2025-11-11 10:30:00")');
      orderItems.forEach(item => {
        itemStmt.run(item.order_id, item.product_id, item.quantity, item.unit_price, item.total_price, function(err) {
          if (err) {
            console.error('插入订单项失败:', err);
          } else {
            console.log('插入订单项成功，ID:', this.lastID);
          }
        });
      });
      itemStmt.finalize();
      
      // 插入其他订单的订单项
      insertOtherOrderItems(db);
    });
  });
});

function insertOtherOrderItems(db) {
  // 获取订单T002的ID
  db.get("SELECT id FROM orders WHERE order_no = 'T002'", (err, row) => {
    if (err) {
      console.error('查询订单T002 ID失败:', err);
      db.close();
      return;
    }
    
    if (!row) {
      console.log('未找到订单T002');
      db.close();
      return;
    }
    
    const orderId = row.id;
    console.log('订单T002的ID:', orderId);
    
    // 插入订单项
    const orderItems = [
      { order_id: orderId, product_id: 2, quantity: 1, unit_price: 3.5, total_price: 3.5 }, // 百事可乐 x1
      { order_id: orderId, product_id: 3, quantity: 1, unit_price: 8.5, total_price: 8.5 }  // 乐事薯片 x1
    ];
    
    const itemStmt = db.prepare('INSERT INTO order_items (order_id, product_id, quantity, unit_price, total_price, discount_amount, created_at) VALUES (?, ?, ?, ?, ?, 0, "2025-11-11 11:45:00")');
    orderItems.forEach(item => {
      itemStmt.run(item.order_id, item.product_id, item.quantity, item.unit_price, item.total_price, function(err) {
        if (err) {
          console.error('插入订单项失败:', err);
        } else {
          console.log('插入订单项成功，ID:', this.lastID);
        }
      });
    });
    itemStmt.finalize();
    
    // 获取订单T003的ID
    db.get("SELECT id FROM orders WHERE order_no = 'T003'", (err, row) => {
      if (err) {
        console.error('查询订单T003 ID失败:', err);
        db.close();
        return;
      }
      
      if (!row) {
        console.log('未找到订单T003');
        db.close();
        return;
      }
      
      const orderId = row.id;
      console.log('订单T003的ID:', orderId);
      
      // 插入订单项
      const orderItems = [
        { order_id: orderId, product_id: 1, quantity: 5, unit_price: 3.5, total_price: 17.5 }, // 可口可乐 x5
        { order_id: orderId, product_id: 9, quantity: 1, unit_price: 20, total_price: 20 }      // 红塔山香烟 x1
      ];
      
      const itemStmt = db.prepare('INSERT INTO order_items (order_id, product_id, quantity, unit_price, total_price, discount_amount, created_at) VALUES (?, ?, ?, ?, ?, 0, "2025-11-11 12:15:00")');
      orderItems.forEach(item => {
        itemStmt.run(item.order_id, item.product_id, item.quantity, item.unit_price, item.total_price, function(err) {
          if (err) {
            console.error('插入订单项失败:', err);
          } else {
            console.log('插入订单项成功，ID:', this.lastID);
          }
        });
      });
      itemStmt.finalize();
      
      db.close();
    });
  });
}