const express = require('express');
const cors = require('cors');
const mysql = require('mysql2/promise');

const app = express();
app.use(cors());
app.use(express.json());

// 数据库连接配置
const dbConfig = {
    host: '127.0.0.1',
    user: 'root',
    password: '',
    database: 'tg_manage'
};

// TG账号列表接口 - 简化版
app.post('/api/tgAccount/list', async (req, res) => {
    try {
        const connection = await mysql.createConnection(dbConfig);
        
        const page = (req.body && req.body.page) || 1;
        const size = (req.body && req.body.size) || 10;
        
        // 查询总数
        const [countResult] = await connection.execute('SELECT COUNT(*) as total FROM accounts');
        const total = countResult[0].total;

        // 查询数据 - 使用字符串拼接避免参数问题
        const offset = (page - 1) * size;
        const [rows] = await connection.execute(
            `SELECT id, phone, firstname, lastname, status, usageId, createdAt, updatedAt, lastOnline, isBan FROM accounts ORDER BY id DESC LIMIT ${size} OFFSET ${offset}`
        );

        // 统计数据
        const [stats] = await connection.execute(
            `SELECT 
                COUNT(*) as total,
                SUM(CASE WHEN status = 1 THEN 1 ELSE 0 END) as active,
                SUM(CASE WHEN status = 0 THEN 1 ELSE 0 END) as inactive,
                SUM(CASE WHEN isBan = 1 THEN 1 ELSE 0 END) as banned
            FROM accounts`
        );

        await connection.end();

        res.json({
            success: true,
            code: 200,
            data: {
                list: rows,
                total: total,
                page: page,
                size: size,
                totalPages: Math.ceil(total / size),
                stats: stats[0]
            },
            msg: '查询成功'
        });

    } catch (error) {
        console.error('API错误:', error);
        res.status(500).json({
            success: false,
            code: 500,
            data: null,
            msg: '服务器错误: ' + error.message
        });
    }
});

// 账号用途列表接口
app.post('/api/tgAccount/usageList', async (req, res) => {
    try {
        const connection = await mysql.createConnection(dbConfig);
        
        const [rows] = await connection.execute(
            `SELECT usageId, COUNT(*) as count, 
                CASE usageId 
                    WHEN 1 THEN '营销推广'
                    WHEN 2 THEN '客服咨询' 
                    WHEN 3 THEN '群组管理'
                    WHEN 4 THEN '自动回复'
                    WHEN 5 THEN '数据采集'
                    ELSE '未分类'
                END as usageName
            FROM accounts 
            GROUP BY usageId
            ORDER BY count DESC`
        );

        await connection.end();

        res.json({
            success: true,
            code: 200,
            data: {
                list: rows,
                total: rows.length
            },
            msg: '查询成功'
        });

    } catch (error) {
        console.error('API错误:', error);
        res.status(500).json({
            success: false,
            code: 500,
            data: null,
            msg: '服务器错误: ' + error.message
        });
    }
});

// TG账号用途管理接口
app.post('/accountUsage/list', async (req, res) => {
    try {
        const connection = await mysql.createConnection(dbConfig);
        
        const pageIndex = (req.body && req.body.pageIndex) || 1;
        const pageSize = (req.body && req.body.pageSize) || 10;
        const type = (req.body && req.body.type) || '';
        
        let whereClause = '';
        if (type) {
            whereClause = `WHERE type LIKE '%${type}%'`;
        }
        
        // 查询总数
        const [countResult] = await connection.execute(`SELECT COUNT(*) as total FROM account_usages ${whereClause}`);
        const total = countResult[0].total;

        // 查询数据
        const offset = (pageIndex - 1) * pageSize;
        const [rows] = await connection.execute(
            `SELECT id, type, createdAt, updatedAt FROM account_usages ${whereClause} ORDER BY id DESC LIMIT ${pageSize} OFFSET ${offset}`
        );

        await connection.end();

        res.json({
            success: true,
            code: '200',
            message: '查询成功',
            data: {
                list: rows,
                totalRow: total,
                pageIndex: pageIndex,
                pageSize: pageSize
            }
        });

    } catch (error) {
        console.error('账号用途API错误:', error);
        res.status(500).json({
            success: false,
            code: '500',
            message: '服务器错误: ' + error.message,
            data: null
        });
    }
});

// 添加账号用途接口
app.post('/accountUsage/add', async (req, res) => {
    try {
        const connection = await mysql.createConnection(dbConfig);
        const { type } = req.body;
        
        const [result] = await connection.execute(
            'INSERT INTO account_usages (type, createdAt, updatedAt) VALUES (?, NOW(), NOW())',
            [type]
        );

        await connection.end();

        res.json({
            success: true,
            code: '200',
            message: '添加成功',
            data: { id: result.insertId }
        });

    } catch (error) {
        console.error('添加账号用途错误:', error);
        res.status(500).json({
            success: false,
            code: '500',
            message: '添加失败: ' + error.message,
            data: null
        });
    }
});

// 更新账号用途接口
app.post('/accountUsage/update', async (req, res) => {
    try {
        const connection = await mysql.createConnection(dbConfig);
        const { id, type } = req.body;
        
        await connection.execute(
            'UPDATE account_usages SET type = ?, updatedAt = NOW() WHERE id = ?',
            [type, id]
        );

        await connection.end();

        res.json({
            success: true,
            code: '200',
            message: '更新成功',
            data: null
        });

    } catch (error) {
        console.error('更新账号用途错误:', error);
        res.status(500).json({
            success: false,
            code: '500',
            message: '更新失败: ' + error.message,
            data: null
        });
    }
});

// 启动服务
const PORT = 3002;
app.listen(PORT, () => {
    console.log(`🚀 简化API服务启动成功，端口: ${PORT}`);
    console.log(`📡 TG账号列表: POST http://localhost:${PORT}/api/tgAccount/list`);
    console.log(`📊 账号用途统计: POST http://localhost:${PORT}/api/tgAccount/usageList`);
    console.log(`📋 账号用途管理: POST http://localhost:${PORT}/accountUsage/list`);
    console.log(`➕ 添加账号用途: POST http://localhost:${PORT}/accountUsage/add`);
    console.log(`✏️  更新账号用途: POST http://localhost:${PORT}/accountUsage/update`);
});