const express = require('express');
const router = express.Router();
const {getDB} = require('../database');
const {agentAuth} = require('../middleware/agentAuth');
const {logger} = require('../config/logger');
const bcrypt = require('bcryptjs');

/**
 * 获取代理下级用户列表
 * GET /api/users
 */
router.get('/', agentAuth, async (req, res) => {
    try {
        const agentId = req.agent.id;
        const {
            page = 1,
            limit = 20,
            search,
            role,
            sort_by = 'created_at',
            sort_order = 'desc',
            city,
            district
        } = req.query;

        const pageNum = parseInt(page) || 1;
        const limitNum = parseInt(limit) || 20;
        const offset = (pageNum - 1) * limitNum;

        // 构建查询条件
        let whereConditions = ['am.agent_id = ?'];
        let queryParams = [agentId];

        if (search) {
            whereConditions.push('(u.username LIKE ? OR u.real_name LIKE ? OR u.phone LIKE ?)');
            queryParams.push(`%${search}%`, `%${search}%`, `%${search}%`);
        }

        if (role) {
            whereConditions.push('u.role = ?');
            queryParams.push(role);
        }

        if (city) {
            whereConditions.push('u.city = ?');
            queryParams.push(city);
        }

        if (district) {
            whereConditions.push('u.district_id = ?');
            queryParams.push(district);
        }

        const whereClause = whereConditions.join(' AND ');

        // 验证排序字段
        const allowedSortFields = ['created_at', 'updated_at', 'balance', 'username', 'real_name'];
        const sortBy = allowedSortFields.includes(sort_by) ? sort_by : 'created_at';
        const sortOrder = sort_order.toLowerCase() === 'asc' ? 'ASC' : 'DESC';

        // 查询用户列表
        const usersQuery = `
            SELECT u.id,
                   u.username,
                   u.real_name,
                   u.phone,
                   u.email,
                   u.avatar,
                   u.role,
                   u.city,
                   u.balance,
                   u.points,
                   u.created_at,
                   u.updated_at,
                   am.created_at                        as join_date,
                   (SELECT CAST(COALESCE(SUM(amount), 0) AS DECIMAL(10, 2))
                    FROM transfers
                    WHERE from_user_id = u.id
                      AND DATE(created_at) = CURDATE()) as today_transfer_out,
                   (SELECT CAST(COALESCE(SUM(amount), 0) AS DECIMAL(10, 2))
                    FROM transfers
                    WHERE to_user_id = u.id
                      AND DATE(created_at) = CURDATE()) as today_transfer_in
            FROM agent_merchants am
                     LEFT JOIN users u ON am.merchant_id = u.id
            WHERE ${whereClause}
            ORDER BY u.${sortBy} ${sortOrder}
            LIMIT ${limitNum} OFFSET ${offset}
        `;

        const [users] = await getDB().execute(usersQuery, queryParams);

        // 查询总数
        const countQuery = `
            SELECT COUNT(*) as total
            FROM agent_merchants am
                     LEFT JOIN users u ON am.merchant_id = u.id
            WHERE ${whereClause}
        `;

        const [countResult] = await getDB().execute(countQuery, queryParams);
        const total = countResult[0]?.total || 0;

        // 查询统计信息
        const [statsResult] = await getDB().execute(`
            SELECT COUNT(*)                                                    as total_users,
                   COUNT(CASE WHEN u.audit_status = 'approved' THEN 1 END)     as active_users,
                   CAST(COALESCE(SUM(u.balance), 0) AS DECIMAL(10, 2))         as total_balance,
                   COUNT(CASE WHEN DATE(am.created_at) = CURDATE() THEN 1 END) as today_new_users
            FROM agent_merchants am
                     LEFT JOIN users u ON am.merchant_id = u.id
            WHERE am.agent_id = ?
        `, [agentId]);

        const stats = statsResult[0] || {
            total_users: 0,
            active_users: 0,
            total_balance: '0.00',
            today_new_users: 0
        };

        res.json({
            success: true,
            data: {
                users,
                pagination: {
                    current_page: pageNum,
                    per_page: limitNum,
                    total,
                    total_pages: Math.ceil(total / limitNum)
                },
                stats
            }
        });

    } catch (error) {
        logger.error('获取用户列表失败', {
            error: error.message,
            stack: error.stack,
            agentId: req.agent?.id
        });

        res.status(500).json({
            success: false,
            message: '获取用户列表失败'
        });
    }
});

/**
 * 获取直营列表
 *
 */
router.get('/directly_operated', agentAuth, async (req, res) => {
    try {
        const agentId = req.agent.userId; // 修正为正确的字段名
        const {
            page = 1,
            size = 20,
            search,
            sort_by = 'created_at',
            sort_order = 'desc',
        } = req.query;

        // 转换分页参数
        const pageNum = parseInt(page);
        const pageSize = parseInt(size);
        const offset = (pageNum - 1) * pageSize;

        // 构建查询条件
        let whereConditions = ['u.inviter = ?'];
        let queryParams = [agentId];
        whereConditions.push('u.user_type = ?')
        queryParams.push('directly_operated');
        // 添加搜索条件
        if (search) {
            whereConditions.push('(u.username LIKE ? OR u.real_name LIKE ? OR u.phone LIKE ?)');
            const searchPattern = `%${search}%`;
            queryParams.push(searchPattern, searchPattern, searchPattern);
        }

        const whereClause = whereConditions.join(' AND ');

        // 验证排序字段和顺序
        const validSortFields = ['id', 'username', 'real_name', 'created_at', 'updated_at', 'balance', 'points'];
        const validSortOrders = ['asc', 'desc'];
        const sortField = validSortFields.includes(sort_by) ? sort_by : 'created_at';
        const sortOrder = validSortOrders.includes(sort_order.toLowerCase()) ? sort_order.toUpperCase() : 'DESC';

        // 查询总数
        const [countResult] = await getDB().execute(`
            SELECT COUNT(*) as total
            FROM users u
            WHERE ${whereClause}
        `, queryParams);
        const total = countResult[0].total;

        // 查询用户列表
        const [users] = await getDB().execute(`
            SELECT u.*
            FROM users u
            WHERE ${whereClause}
            ORDER BY u.${sortField} ${sortOrder}
            LIMIT ${pageSize} OFFSET ${offset}
        `, [...queryParams]);

        // 计算分页信息
        const totalPages = Math.ceil(total / pageSize);
        const hasNextPage = pageNum < totalPages;
        const hasPrevPage = pageNum > 1;
        const all_total = {
            balance_total : 0
        }
        //直营用户融豆数量
        const balance_total = await getDB().execute(`
         SELECT SUM(balance) as balance FROM users u
          WHERE inviter=${agentId}
        `)
        all_total.balance_total = balance_total[0].balance || 0;
        //今日提现
        const withdraw_total = await getDB().execute(`
            SELECT SUM(amount) as amount
            FROM transfers
            WHERE source_type = 'withdraw'
              AND from_user_id = ${agentId}
              AND created_at >= DATE_SUB(CURDATE(), INTERVAL 1 DAY)
        `)
        all_total.withdraw_total = withdraw_total[0].amount || 0
        //总提现次数
        const withdraw_num_total = await getDB().execute(`
            SELECT COUNT(*) as total
            FROM transfers
            WHERE source_type = 'withdraw'
              AND from_user_id = ${agentId}
        `)
        all_total.withdraw_num_total = withdraw_num_total[0].total || 0
        res.json({
            success: true,
            data: {
                all_total,
                users,
                pagination: {
                    current_page: pageNum,
                    per_page: pageSize,
                    total,
                    total_pages: totalPages,
                    has_next_page: hasNextPage,
                    has_prev_page: hasPrevPage
                }
            }
        });
    } catch (error) {
        logger.error('获取直营用户列表失败', {
            error: error.message,
            stack: error.stack,
            agentId: req.agent?.id
        });

        res.status(500).json({
            success: false,
            message: '获取直营用户列表失败'
        });
    }
})


/**
 * 创建直营用户
 */
router.post('/create', agentAuth, async (req, res) => {
    try {
        const db = getDB();
        const agentId = req.agent.userId;
        const {username, real_name, phone, password, avatar} = req.body;

        // 验证必填字段
        if (!username || !real_name || !phone || !password) {
            return res.status(400).json({
                success: false,
                message: '请填写完整用户信息'
            });
        }
        // 检查用户是否已存在
        const [existingUsers] = await db.execute(
            'SELECT id FROM users WHERE username = ? OR phone = ?',
            [username, phone || null]
        );

        if (existingUsers.length > 0) {
            return res.status(400).json({success: false, message: '用户名或手机号已存在'});
        }
        const hashedPassword = await bcrypt.hash(password, 10);
        const [agent] = await db.execute('SELECT * FROM users WHERE id = ?', [agentId]);
        console.log(agent, 'agent');
        const {city, district_id, province} = agent[0];
        const [result] = await db.execute(
            'INSERT INTO users (username, phone, password, avatar, points, audit_status, city, district_id, payment_status, province, inviter,user_type,real_name) VALUES (?, ?, ?, ?, ?, ?, ?, ?, "paid", ?, ?,?,?)',
            [username, phone, hashedPassword, avatar, 0, 'approved', city, district_id, province, agentId, 'directly_operated',real_name]
        );
        const userId = result.insertId;
        res.json({
            success: true,
            message: '直营用户创建成功',
            userId
        });
    } catch (error) {
        logger.error('创建直营用户失败', {
            error: error.message,
            stack: error.stack,
            agentId: req.agent?.id
        });

        res.status(500).json({
            success: false,
            message: '创建直营用户失败'
        });
    }
})

/**
 * 直营用户提现
 *
 */
router.post('/withdraw', agentAuth, async (req, res) => {
    const db = getDB();
    try {
        const agentId = req.agent.userId;
        const {userId, amount} = req.body;

        // 验证必填字段
        if (!userId || !amount) {
            return res.status(400).json({
                success: false,
                message: '请填写完整提现信息'
            });
        }
        let [userInfo] = await db.execute(
            `SELECT *
             FROM users
             WHERE id = ?
               AND user_type = 'directly_operated'`,
            [userId]
        )

        if (userInfo.length > 0) {
            let balance = Math.abs(userInfo[0].balance)
            if (balance >= amount) {
                await db.query('START TRANSACTION');
                await db.execute(`UPDATE users
                                  SET balance = balance + ?
                                  WHERE id = ?`, [amount, userId])
                await db.execute(
                    'INSERT INTO transfers (from_user_id, to_user_id, transfer_type,status,amount,description,source_type) VALUES (?, ?, ?,?,?,?,?)',
                    [agentId, userId, 'agent_to_operated', 'received', amount, '直营商户提现', 'withdraw']
                );
                // 提交事务
                await db.query('COMMIT');
                res.json({
                    success: true,
                    message: '提现成功'
                })
            } else {
                res.status(400).json({
                    success: false,
                    message: '用户余额不足'
                })
            }

        } else {
            res.status(400).json({
                success: false,
                message: '无此直营用户'
            })
        }
    } catch (error) {
        await db.query('ROLLBACK');
        logger.error('直营用户提现失败', {
            error: error.message,
            stack: error.stack,
            agentId: req.agent?.id
        });
        res.status(500).json({
            success: false,
            message: '系统错误请联系管理员'
        })
    }
})

module.exports = router;