/**
 * 商品数据迁移脚本 - Node.js
 * Feature: database-migration, Property 2: 数据记录数一致性
 * Feature: database-migration, Property 5: 业务配置完整性
 * Validates: Requirements 2.6, 2.7
 * 
 * 源表: MySQL goods (503 条记录)
 * 目标表: SQL Server goods
 * 
 * 字段映射:
 * - imgurl -> img_url
 * - imgurl_detail -> img_url_detail
 * - prize_imgurl -> prize_img_url
 * - addtime -> created_at (Unix时间戳转DATETIME2)
 * - update_time -> updated_at (Unix时间戳转DATETIME2)
 * - delete_time -> deleted_at (Unix时间戳转DATETIME2)
 * - lock_time -> lock_time (Unix时间戳转DATETIME2)
 * - sale_time -> sale_time (Unix时间戳转DATETIME2)
 * - flw_start_time -> flw_start_time (Unix时间戳转DATETIME2)
 * - flw_end_time -> flw_end_time (Unix时间戳转DATETIME2)
 * - open_time -> open_time (Unix时间戳转DATETIME2)
 */

const mysql = require('mysql2/promise');
const sql = require('mssql');

// MySQL 配置
const mysqlConfig = {
    host: '192.168.195.16',
    port: 1887,
    user: 'root',
    password: 'Dbt@com@123',
    database: 'youdas',
    charset: 'utf8mb4'
};

// SQL Server 配置
const sqlServerConfig = {
    server: '192.168.195.15',
    port: 1433,
    user: 'sa',
    password: 'Dbt@com@123',
    database: 'honey_box',
    options: {
        encrypt: false,
        trustServerCertificate: true
    }
};

// Unix时间戳转换为 SQL Server DATETIME2 格式
function unixToDatetime(timestamp) {
    if (!timestamp || timestamp === 0) {
        return null;
    }
    const date = new Date(timestamp * 1000);
    return date.toISOString().slice(0, 23).replace('T', ' ');
}

// 转义SQL字符串
function escapeString(str) {
    if (str === null || str === undefined || str === 'None') return 'NULL';
    return "N'" + String(str).replace(/'/g, "''") + "'";
}

// 格式化日期时间
function formatDatetime(dt) {
    if (!dt) return 'NULL';
    return "'" + dt + "'";
}

// 格式化MySQL datetime字段
function formatMySqlDatetime(dt) {
    if (!dt || dt === 'None') return 'NULL';
    if (dt instanceof Date) {
        return "'" + dt.toISOString().slice(0, 23).replace('T', ' ') + "'";
    }
    return "'" + String(dt).slice(0, 23).replace('T', ' ') + "'";
}

// 获取已迁移的商品ID列表
async function getMigratedIds(pool) {
    const result = await pool.request().query('SELECT id FROM goods');
    return new Set(result.recordset.map(r => r.id));
}

// 批量插入商品数据
async function insertGoodsBatch(pool, goodsList) {
    if (goodsList.length === 0) return 0;
    
    let insertedCount = 0;
    
    for (const goods of goodsList) {
        try {
            // 时间戳转换
            const createdAt = unixToDatetime(goods.addtime) || new Date().toISOString().slice(0, 23).replace('T', ' ');
            const updatedAt = unixToDatetime(goods.update_time) || createdAt;
            const deletedAt = unixToDatetime(goods.delete_time);
            const lockTime = unixToDatetime(goods.lock_time);
            const saleTime = unixToDatetime(goods.sale_time);
            const flwStartTime = unixToDatetime(goods.flw_start_time);
            const flwEndTime = unixToDatetime(goods.flw_end_time);
            const openTime = unixToDatetime(goods.open_time);
            const asyncDate = formatMySqlDatetime(goods.async_date);
            
            const insertSql = `
SET IDENTITY_INSERT goods ON;
INSERT INTO goods (
    id, category_id, title, img_url, img_url_detail, price, stock, sale_stock,
    lock_is, lock_time, coupon_is, coupon_pro, integral_is, prize_num, status, sort,
    type, show_is, show_price, prize_img_url, card_banner, card_set, card_notice, card_num,
    sale_time, created_at, updated_at, deleted_at,
    rage_is, rage, item_card_id, lingzhu_is, lingzhu_fan, lingzhu_shang_id,
    king_user_id, lian_ji_num, lian_ji_shang_id, is_shou_zhe, new_is, goods_describe,
    quanju_xiangou, daily_xiangou, day_price, mouth_price, mouth_pay_price, day_pay_price,
    user_lv, is_flw, flw_start_time, flw_end_time, open_time, is_open, choujiang_xianzhi,
    async_code, async_date, is_auto_xiajia, xiajia_lirun, xiajia_auto_coushu, xiajia_jine, unlock_amount
) VALUES (
    ${goods.id},
    ${goods.category_id || 0},
    ${escapeString(goods.title)},
    ${escapeString(goods.imgurl)},
    ${escapeString(goods.imgurl_detail)},
    ${parseFloat(goods.price) || 0},
    ${goods.stock || 0},
    ${goods.sale_stock || 0},
    ${goods.lock_is || 0},
    ${formatDatetime(lockTime)},
    ${goods.coupon_is || 0},
    ${goods.coupon_pro || 0},
    ${goods.integral_is || 0},
    ${goods.prize_num || 0},
    ${goods.status || 1},
    ${goods.sort || 1},
    ${goods.type || 0},
    ${goods.show_is || 0},
    ${escapeString(goods.show_price)},
    ${escapeString(goods.prize_imgurl)},
    ${escapeString(goods.card_banner)},
    ${escapeString(goods.card_set)},
    ${escapeString(goods.card_notice)},
    ${goods.card_num || 1},
    ${formatDatetime(saleTime)},
    ${formatDatetime(createdAt)},
    ${formatDatetime(updatedAt)},
    ${formatDatetime(deletedAt)},
    ${goods.rage_is || 0},
    ${goods.rage || 0},
    ${goods.item_card_id || 0},
    ${goods.lingzhu_is || 0},
    ${goods.lingzhu_fan || 0},
    ${goods.lingzhu_shang_id || 0},
    ${goods.king_user_id || 0},
    ${goods.lian_ji_num || 0},
    ${goods.lian_ji_shang_id || 0},
    ${goods.is_shou_zhe || 0},
    ${goods.new_is || 0},
    ${escapeString(goods.goods_describe)},
    ${goods.quanju_xiangou || 0},
    ${goods.daily_xiangou || 0},
    ${parseFloat(goods.day_price) || 0},
    ${parseFloat(goods.mouth_price) || 0},
    ${parseFloat(goods.mouth_pay_price) || 0},
    ${parseFloat(goods.day_pay_price) || 0},
    ${goods.user_lv !== null && goods.user_lv !== undefined ? goods.user_lv : -1},
    ${goods.is_flw || 0},
    ${formatDatetime(flwStartTime)},
    ${formatDatetime(flwEndTime)},
    ${formatDatetime(openTime)},
    ${goods.is_open || 0},
    ${goods.choujiang_xianzhi || 0},
    ${escapeString(goods.async_code)},
    ${asyncDate},
    ${goods.is_auto_xiajia || 0},
    ${goods.xiajia_lirun || 0},
    ${goods.xiajia_auto_coushu || 0},
    ${goods.xiajia_jine || 0},
    ${parseFloat(goods.unlock_amount) || 0}
);
SET IDENTITY_INSERT goods OFF;`;
            
            await pool.request().batch(insertSql);
            insertedCount++;
        } catch (err) {
            console.error(`插入商品 ${goods.id} (${goods.title}) 失败:`, err.message);
        }
    }
    
    return insertedCount;
}

async function main() {
    console.log('========================================');
    console.log('商品数据迁移脚本 - Node.js');
    console.log('========================================\n');
    
    let mysqlConn = null;
    let sqlPool = null;
    
    try {
        // 连接 MySQL
        console.log('正在连接 MySQL...');
        mysqlConn = await mysql.createConnection(mysqlConfig);
        console.log('MySQL 连接成功\n');
        
        // 连接 SQL Server
        console.log('正在连接 SQL Server...');
        sqlPool = await sql.connect(sqlServerConfig);
        console.log('SQL Server 连接成功\n');
        
        // 获取已迁移的ID
        console.log('正在获取已迁移的商品ID...');
        const migratedIds = await getMigratedIds(sqlPool);
        console.log(`已迁移商品数: ${migratedIds.size}\n`);
        
        // 从 MySQL 获取所有商品数据
        console.log('正在从 MySQL 读取商品数据...');
        const [rows] = await mysqlConn.execute(`
            SELECT id, category_id, title, imgurl, imgurl_detail, price, stock, sale_stock,
                   lock_is, lock_time, coupon_is, coupon_pro, integral_is, prize_num, status, sort,
                   type, show_is, show_price, prize_imgurl, card_banner, card_set, card_notice, card_num,
                   sale_time, addtime, update_time, delete_time,
                   rage_is, rage, item_card_id, lingzhu_is, lingzhu_fan, lingzhu_shang_id,
                   king_user_id, lian_ji_num, lian_ji_shang_id, is_shou_zhe, new_is, goods_describe,
                   quanju_xiangou, daily_xiangou, day_price, mouth_price, mouth_pay_price, day_pay_price,
                   user_lv, is_flw, flw_start_time, flw_end_time, open_time, is_open, choujiang_xianzhi,
                   async_code, async_date, is_auto_xiajia, xiajia_lirun, xiajia_auto_coushu, xiajia_jine, unlock_amount
            FROM goods
            ORDER BY id
        `);
        console.log(`MySQL 商品总数: ${rows.length}\n`);
        
        // 过滤出未迁移的商品
        const goodsToMigrate = rows.filter(goods => !migratedIds.has(goods.id));
        console.log(`待迁移商品数: ${goodsToMigrate.length}\n`);
        
        if (goodsToMigrate.length === 0) {
            console.log('所有商品数据已迁移完成！');
        } else {
            // 批量迁移（每批20条，避免SQL太长）
            const batchSize = 20;
            let totalInserted = 0;
            
            for (let i = 0; i < goodsToMigrate.length; i += batchSize) {
                const batch = goodsToMigrate.slice(i, i + batchSize);
                const inserted = await insertGoodsBatch(sqlPool, batch);
                totalInserted += inserted;
                console.log(`进度: ${Math.min(i + batchSize, goodsToMigrate.length)}/${goodsToMigrate.length} (本批插入: ${inserted})`);
            }
            
            console.log(`\n迁移完成！共插入 ${totalInserted} 条记录`);
        }
        
        // 验证迁移结果
        console.log('\n========================================');
        console.log('迁移结果验证');
        console.log('========================================');
        
        const [mysqlCount] = await mysqlConn.execute('SELECT COUNT(*) as count FROM goods');
        const sqlResult = await sqlPool.request().query('SELECT COUNT(*) as count FROM goods');
        
        console.log(`MySQL goods 表记录数: ${mysqlCount[0].count}`);
        console.log(`SQL Server goods 表记录数: ${sqlResult.recordset[0].count}`);
        
        if (mysqlCount[0].count === sqlResult.recordset[0].count) {
            console.log('\n✅ 数据迁移完成，记录数一致！');
        } else {
            console.log(`\n⚠️ 记录数不一致，差异: ${mysqlCount[0].count - sqlResult.recordset[0].count}`);
        }
        
        // 验证福利屋配置（is_flw, flw_start_time, flw_end_time）
        console.log('\n========================================');
        console.log('福利屋配置验证');
        console.log('========================================');
        
        const [mysqlFlw] = await mysqlConn.execute('SELECT COUNT(*) as count FROM goods WHERE is_flw = 1');
        const sqlFlwResult = await sqlPool.request().query('SELECT COUNT(*) as count FROM goods WHERE is_flw = 1');
        
        console.log(`MySQL 福利屋商品数: ${mysqlFlw[0].count}`);
        console.log(`SQL Server 福利屋商品数: ${sqlFlwResult.recordset[0].count}`);
        
        if (mysqlFlw[0].count === sqlFlwResult.recordset[0].count) {
            console.log('✅ 福利屋配置迁移正确！');
        } else {
            console.log('⚠️ 福利屋配置数量不一致！');
        }
        
        // 验证限购配置（quanju_xiangou, daily_xiangou, choujiang_xianzhi）
        console.log('\n========================================');
        console.log('限购配置验证');
        console.log('========================================');
        
        const [mysqlXiangou] = await mysqlConn.execute('SELECT COUNT(*) as count FROM goods WHERE quanju_xiangou > 0 OR daily_xiangou > 0 OR choujiang_xianzhi > 0');
        const sqlXiangouResult = await sqlPool.request().query('SELECT COUNT(*) as count FROM goods WHERE quanju_xiangou > 0 OR daily_xiangou > 0 OR choujiang_xianzhi > 0');
        
        console.log(`MySQL 有限购配置的商品数: ${mysqlXiangou[0].count}`);
        console.log(`SQL Server 有限购配置的商品数: ${sqlXiangouResult.recordset[0].count}`);
        
        if (mysqlXiangou[0].count === sqlXiangouResult.recordset[0].count) {
            console.log('✅ 限购配置迁移正确！');
        } else {
            console.log('⚠️ 限购配置数量不一致！');
        }
        
    } catch (err) {
        console.error('迁移过程中发生错误:', err);
        process.exit(1);
    } finally {
        // 关闭连接
        if (mysqlConn) await mysqlConn.end();
        if (sqlPool) await sqlPool.close();
    }
}

main();