const express = require('express');
const router = express.Router();
const {getDB} = require('../database');

/**
 * @swagger
 * tags:
 *   name: Mall
 *   description: 商城模块
 */

router.get('/', async (req, res) => {
    try {
        const conn = await getDB()

        const {
            page = '1',
            size = '10',
            category = '',
            keyword = '',
        } = req.query;

        const pageNum = Math.max(1, parseInt(page) || 1);
        const pageSize = Math.max(1, Math.min(100, parseInt(size) || 10)); // 限制最大100条
        const offset = Math.max(0, (pageNum - 1) * pageSize);

        console.log("分页参数:", {pageNum, pageSize, offset, category, keyword})

        let whereClause = " and status = 'active'";
        if (category) {
            whereClause += ` and category = '${category}'`;
        }
        if (keyword) {
            whereClause += ` and name like '%${keyword}%'`;
        }

        // 获取商品总数
        const [countResult] = await conn.execute(`
            select count(1) as total
            from products
            where '1 = 1' ${whereClause}
        `)
        const total = countResult[0].total;

        // 获取商品列表
        const queryMallListSql = `
            select *
            from products
            where '1 = 1' ${whereClause}
            order by created_at desc
            limit ${pageSize} offset ${offset}
        `
        const [products] = await conn.execute(queryMallListSql)

        res.json({
            success: true,
            data: {
                products,
                pagination: {
                    page: pageNum,
                    size: pageSize,
                    total,
                    pages: Math.ceil(total / pageSize)
                }
            }
        })
    } catch (error) {
        console.error('获取商品列表错误:', error);
        res.status(500).json({success: false, message: '获取商品列表失败'});
    }
})

module.exports = router