const express = require('express');
const router = express.Router();
const { getDB } = require('../database');
const matchingService = require('../services/matchingService');
const { auth } = require('../middleware/auth');
const { default: axios } = require('axios');


router.post('/create', auth, async (req, res) => {
  try {
    console.log('匹配订单创建请求 - 用户ID:', req.user.id);
    console.log('请求体:', req.body);
    const userId = req.user.id;
    const { matchingType = 'small', customAmount } = req.body;
    const [user_type] = await getDB().query(`SELECT count(*) as total FROM users WHERE id=${userId} and user_type='directly_operated'`);
    if(user_type[0].total > 0){
        return res.status(400).json({message: '平台暂不支持直营用户获得融豆'})
    }
    // 验证匹配类型
    if (!['small', 'large'].includes(matchingType)) {
      return res.status(400).json({ message: '无效的匹配类型' });
    }
    
    // 验证大额匹配的金额
    if (matchingType === 'large') {
      if (!customAmount || typeof customAmount !== 'number') {
        return res.status(400).json({ message: '大额匹配需要指定金额' });
      }
      if (customAmount < 3000 || customAmount > 50000) {
        return res.status(400).json({ message: '大额匹配金额必须在3000-50000之间' });
      }
    }
    
    // 检查用户是否有未完成的匹配订单（排除已失败的订单）
    const [existingOrders] = await getDB().execute(
      'SELECT COUNT(*) as count FROM matching_orders WHERE initiator_id = ? AND status IN ("pending", "matching")',
      [userId]
    );
    
    if (existingOrders[0].count > 0) {
      return res.status(400).json({ message: '您有未完成的匹配订单，请等待完成后再创建新订单' });
    }
    
    // 校验用户是否已上传必要的证件和收款码
    const [userInfo] = await getDB().execute(
      'SELECT business_license, id_card_front, id_card_back, wechat_qr, alipay_qr, bank_card, unionpay_qr FROM users WHERE id = ?',
      [userId]
    );
    
    if (userInfo.length === 0) {
      return res.status(404).json({ message: '用户不存在' });
    }
    
    const user = userInfo[0];
    
    // 检查证件是否已上传
    if (!user.business_license || !user.id_card_front || !user.id_card_back) {
      return res.status(400).json({ 
        message: '开始匹配前，请先在个人中心上传营业执照和身份证正反面',
        code: 'MISSING_DOCUMENTS'
      });
    }
    
    // 检查收款码是否已上传（至少需要一种收款方式）
    if (!user.wechat_qr && !user.alipay_qr && !user.bank_card && !user.unionpay_qr) {
      return res.status(400).json({ 
        message: '开始匹配前，请先在个人中心设置至少一种收款方式（微信、支付宝、银行卡或云闪付）',
        code: 'MISSING_PAYMENT_METHODS'
      });
    }
    
    // 创建匹配订单
    const result = await matchingService.createMatchingOrder(userId, matchingType, customAmount);
    
    const message = matchingType === 'small' 
      ? '小额匹配成功！已为您生成3笔转账分配'
      : `大额匹配成功！已为您生成${result.totalAmount}笔转账分配`;
    
    res.json({
      success: true,
      message,
      data: { 
        matchingOrderId: result.orderId,
        amounts: result.amounts,
        matchingType: result.matchingType,
        totalAmount: result.totalAmount
      }
    });
    
  } catch (error) {
    console.error('创建匹配订单失败:', error);
    res.status(500).json({ message: error.message || '匹配失败，请稍后重试' });
  }
});


router.get('/my-orders', auth, async (req, res) => {
  try {
    const userId = req.user.id;
    const page = parseInt(req.query.page) || 1;
    const limit = parseInt(req.query.limit) || 10;
    
    const orders = await matchingService.getUserMatchingOrders(userId, page, limit);
    
    res.json({
      success: true,
      data: orders
    });
    
  } catch (error) {
    console.error('获取匹配订单失败:', error);
    res.status(500).json({ message: '获取匹配订单失败' });
  }
});

/**
 * @swagger
 * /api/matching/pending-allocations:
 *   get:
 *     summary: 获取用户待处理的分配
 *     tags: [Matching]
 *     security:
 *       - bearerAuth: []
 *     responses:
 *       200:
 *         description: 成功获取待处理分配
 *         content:
 *           application/json:
 *             schema:
 *               type: object
 *               properties:
 *                 success:
 *                   type: boolean
 *                 data:
 *                   type: array
 *                   items:
 *                     $ref: '#/components/schemas/Allocation'
 *       401:
 *         description: 未授权
 *       500:
 *         description: 服务器错误
 */
router.get('/pending-allocations', auth, async (req, res) => {
  try {
    const userId = req.user.id;
    
    const allocations = await matchingService.getUserPendingAllocations(userId);
    
    res.json({
      success: true,
      data: allocations
    });
    
  } catch (error) {
    console.error('获取待处理分配失败:', error);
    res.status(500).json({ message: '获取待处理分配失败' });
  }
});

/**
 * @swagger
 * /api/matching/allocation/{id}:
 *   get:
 *     summary: 获取分配详情
 *     tags: [Matching]
 *     security:
 *       - bearerAuth: []
 *     parameters:
 *       - in: path
 *         name: id
 *         required: true
 *         schema:
 *           type: integer
 *         description: 分配ID
 *     responses:
 *       200:
 *         description: 成功获取分配详情
 *         content:
 *           application/json:
 *             schema:
 *               type: object
 *               properties:
 *                 success:
 *                   type: boolean
 *                 data:
 *                   $ref: '#/components/schemas/Allocation'
 *       401:
 *         description: 未授权
 *       403:
 *         description: 无权限访问
 *       404:
 *         description: 分配不存在
 *       500:
 *         description: 服务器错误
 */
router.get('/allocation/:id', auth, async (req, res) => {
  try {
    const db = getDB();
    const allocationId = req.params.id;
    const userId = req.user.id;
    
    // 首先获取分配信息
    const [allocations] = await db.execute(`
      SELECT 
        oa.id,
        oa.from_user_id,
        oa.to_user_id,
        oa.cycle_number,
        oa.amount,
        oa.status,
        oa.created_at,
        from_user.username as from_user_name,
        to_user.username as to_user_name
      FROM transfers oa
      JOIN users from_user ON oa.from_user_id = from_user.id
      JOIN users to_user ON oa.to_user_id = to_user.id
      WHERE oa.id = ?
    `, [allocationId]);
    
    if (allocations.length === 0) {
      return res.status(404).json({ success: false, message: '分配不存在' });
    }
    
    const allocation = allocations[0];
    
    // 检查权限：只有分配的发起人或接收人可以查看
    if (allocation.from_user_id !== userId && allocation.to_user_id !== userId) {
      return res.status(403).json({ success: false, message: '无权限访问此分配' });
    }
    
    res.json({
      success: true,
      data: allocation
    });
  } catch (error) {
    console.error('获取分配详情错误:', error);
    res.status(500).json({ success: false, message: '获取分配详情失败' });
  }
});

/**
 * @swagger
 * /api/matching/confirm-allocation/{allocationId}:
 *   post:
 *     summary: 确认分配（创建转账）
 *     tags: [Matching]
 *     security:
 *       - bearerAuth: []
 *     parameters:
 *       - in: path
 *         name: allocationId
 *         required: true
 *         schema:
 *           type: integer
 *         description: 分配ID
 *     requestBody:
 *       required: true
 *       content:
 *         application/json:
 *           schema:
 *             type: object
 *             properties:
 *               transferAmount:
 *                 type: number
 *                 description: 转账金额
 *               description:
 *                 type: string
 *                 description: 转账描述
 *               voucher:
 *                 type: string
 *                 description: 转账凭证（图片URL）
 *             required:
 *               - voucher
 *     responses:
 *       200:
 *         description: 转账凭证提交成功
 *         content:
 *           application/json:
 *             schema:
 *               type: object
 *               properties:
 *                 success:
 *                   type: boolean
 *                 message:
 *                   type: string
 *                 data:
 *                   type: object
 *                   properties:
 *                     transferId:
 *                       type: integer
 *       400:
 *         description: 参数错误
 *       401:
 *         description: 未授权
 *       500:
 *         description: 服务器错误
 */
router.post('/confirm-allocation/:allocationId', auth, async (req, res) => {
  try {
    const { allocationId } = req.params;
    const userId = req.user.id;
    const { transferAmount, description, voucher } = req.body; // 获取转账信息
    
    // 校验转账凭证是否存在
    if (!voucher) {
      return res.status(400).json({ 
        success: false, 
        message: '请上传转账凭证' 
      });
    }
    
    // 调用服务层方法，传递完整的转账信息
    const transferId = await matchingService.confirmAllocation(
      allocationId, 
      userId, 
      transferAmount,
      description,
      voucher
    );
    
    res.json({
      success: true,
      message: '转账凭证已提交，转账记录已创建',
      data: { transferId }
    });

    axios.post('http://192.168.1.43:5000',{
      allocationId: allocationId
    }).then(res => {
      console.log(res.data)
    })
    
  } catch (error) {
    console.error('确认分配失败:', error);
    res.status(500).json({ message: error.message || '确认分配失败' });
  }
});

/**
 * @swagger
 * /api/matching/reject-allocation/{allocationId}:
 *   post:
 *     summary: 拒绝分配
 *     tags: [Matching]
 *     security:
 *       - bearerAuth: []
 *     parameters:
 *       - in: path
 *         name: allocationId
 *         required: true
 *         schema:
 *           type: integer
 *         description: 分配ID
 *     requestBody:
 *       content:
 *         application/json:
 *           schema:
 *             type: object
 *             properties:
 *               reason:
 *                 type: string
 *                 description: 拒绝原因
 *     responses:
 *       200:
 *         description: 拒绝分配成功
 *         content:
 *           application/json:
 *             schema:
 *               type: object
 *               properties:
 *                 success:
 *                   type: boolean
 *                 message:
 *                   type: string
 *       401:
 *         description: 未授权
 *       404:
 *         description: 分配不存在或无权限
 *       500:
 *         description: 服务器错误
 */
router.post('/reject-allocation/:allocationId', auth, async (req, res) => {
  try {
    const { allocationId } = req.params;
    const userId = req.user.id;
    const { reason } = req.body;
    
    const db = getDB();
    
    // 获取分配信息
    const [allocations] = await db.execute(
      'SELECT * FROM transfers WHERE id = ? AND from_user_id = ?',
      [allocationId, userId]
    );
    
    if (allocations.length === 0) {
      return res.status(404).json({ message: '分配不存在或无权限' });
    }
    
    const allocation = allocations[0];
    
    // 更新分配状态
    await db.execute(
      'UPDATE transfers SET status = "rejected" WHERE id = ?',
      [allocationId]
    );
    
    // 记录拒绝动作
    await db.execute(
      'INSERT INTO matching_records (matching_order_id, user_id, action, note) VALUES (?, ?, "reject", ?)',
      [allocation.matching_order_id, userId, reason || '用户拒绝']
    );
    
    // 检查订单状态是否需要更新
    const statusResult = await matchingService.checkOrderStatusAfterRejection(
      allocation.matching_order_id, 
      allocation.cycle_number
    );
    
    let message = '已拒绝分配';
    if (statusResult === 'failed') {
      message = '已拒绝分配，该轮次所有分配均被拒绝，匹配订单已失败';
    }
    
    res.json({
      success: true,
      message
    });
    
  } catch (error) {
    console.error('拒绝分配失败:', error);
    res.status(500).json({ message: '拒绝分配失败' });
  }
});

/**
 * @swagger
 * /api/matching/order/{orderId}:
 *   get:
 *     summary: 获取匹配订单详情
 *     tags: [Matching]
 *     security:
 *       - bearerAuth: []
 *     parameters:
 *       - in: path
 *         name: orderId
 *         required: true
 *         schema:
 *           type: integer
 *         description: 订单ID
 *     responses:
 *       200:
 *         description: 成功获取订单详情
 *         content:
 *           application/json:
 *             schema:
 *               type: object
 *               properties:
 *                 success:
 *                   type: boolean
 *                 data:
 *                   type: object
 *                   properties:
 *                     order:
 *                       $ref: '#/components/schemas/MatchingOrder'
 *                     allocations:
 *                       type: array
 *                       items:
 *                         $ref: '#/components/schemas/Allocation'
 *                     records:
 *                       type: array
 *                       items:
 *                         type: object
 *       401:
 *         description: 未授权
 *       403:
 *         description: 无权限查看
 *       404:
 *         description: 订单不存在
 *       500:
 *         description: 服务器错误
 */
router.get('/order/:orderId', auth, async (req, res) => {
  try {
    const { orderId } = req.params;
    const userId = req.user.id;
    
    const db = getDB();
    
    // 获取订单基本信息
    const [orders] = await db.execute(
      `SELECT mo.*, u.username as initiator_name,u.real_name as initiator_real_name
       FROM matching_orders mo
       JOIN users u ON mo.initiator_id = u.id
       WHERE mo.id = ?`,
      [orderId]
    );
    
    if (orders.length === 0) {
      return res.status(404).json({ message: '匹配订单不存在' });
    }
    
    const order = orders[0];
    
    // 检查权限（订单发起人或参与者）
    const [userCheck] = await db.execute(
      `SELECT COUNT(*) as count FROM (
         SELECT initiator_id as user_id FROM matching_orders WHERE id = ?
         UNION
         SELECT from_user_id as user_id FROM transfers WHERE id = ?
       ) as participants WHERE user_id = ?`,
      [orderId, orderId, userId]
    );
    
    if (userCheck[0].count === 0) {
      return res.status(403).json({ message: '无权限查看此订单' });
    }
    
    // 获取分配信息
    const [allocations] = await db.execute(
      `SELECT oa.*, 
       uf.username as from_user_name,
       ut.username as to_user_name
       FROM transfers oa
       JOIN users uf ON oa.from_user_id = uf.id
       JOIN users ut ON oa.to_user_id = ut.id
       WHERE oa.id = ?
       ORDER BY oa.cycle_number, oa.created_at`,
      [orderId]
    );
    
    // 获取匹配记录
    const [records] = await db.execute(
      `SELECT mr.*, u.username
       FROM matching_records mr
       JOIN users u ON mr.user_id = u.id
       WHERE mr.matching_order_id = ?
       ORDER BY mr.created_at`,
      [orderId]
    );
    
    res.json({
      success: true,
      data: {
        order,
        allocations,
        records
      }
    });
    
  } catch (error) {
    console.error('获取匹配订单详情失败:', error);
    res.status(500).json({ message: '获取匹配订单详情失败' });
  }
});

/**
 * @swagger
 * /api/matching/stats:
 *   get:
 *     summary: 获取匹配统计信息
 *     tags: [Matching]
 *     security:
 *       - bearerAuth: []
 *     responses:
 *       200:
 *         description: 成功获取统计信息
 *         content:
 *           application/json:
 *             schema:
 *               type: object
 *               properties:
 *                 success:
 *                   type: boolean
 *                 data:
 *                   type: object
 *                   properties:
 *                     userStats:
 *                       type: object
 *                       properties:
 *                         initiated_orders:
 *                           type: integer
 *                         participated_allocations:
 *                           type: integer
 *                         total_initiated_amount:
 *                           type: number
 *                         total_participated_amount:
 *                           type: number
 *       401:
 *         description: 未授权
 *       500:
 *         description: 服务器错误
 */
router.get('/stats', auth, async (req, res) => {
  try {
    const userId = req.user.id;
    const db = getDB();
    
    // 获取用户统计
    const [userStats] = await db.execute(
      `SELECT 
       COUNT(CASE WHEN mo.initiator_id = ? THEN 1 END) as initiated_orders,
       COUNT(CASE WHEN oa.from_user_id = ? THEN 1 END) as participated_allocations,
       SUM(CASE WHEN mo.initiator_id = ? AND mo.status = 'completed' THEN mo.amount ELSE 0 END) as total_initiated_amount,
       SUM(CASE WHEN oa.from_user_id = ? AND oa.status = 'completed' THEN oa.amount ELSE 0 END) as total_participated_amount
       FROM matching_orders mo
       LEFT JOIN transfers oa ON mo.id = oa.id`,
      [userId, userId, userId, userId]
    );
    
    res.json({
      success: true,
      data: {
        userStats: userStats[0]
      }
    });
    
  } catch (error) {
    console.error('获取匹配统计失败:', error);
    res.status(500).json({ message: '获取匹配统计失败' });
  }
});



module.exports = router;