const express = require('express');
const db = require('../db-sqlite');
const { authenticate } = require('../middleware/auth');

module.exports = function(app) {
  const router = express.Router();

  router.get('/', authenticate, async (req, res) => {
    try {
      const customersResult = await db.query('SELECT id, name, contact_person, contact_phone, address, created_at, updated_at FROM customers');
      const customers = customersResult.rows;
      res.json({ success: true, data: customers, count: customers.length });
    } catch (error) {
      console.error('获取客户列表失败:', error);
      res.status(500).json({ success: false, message: '获取客户列表失败' });
    }
  });

  router.get('/:id', authenticate, async (req, res) => {
    try {
      const { id } = req.params;
      const customerResult = await db.query('SELECT id, name, contact_person, contact_phone, address, created_at, updated_at FROM customers WHERE id = ?', [id]);
      
      if (customerResult.rows.length === 0) {
        return res.status(404).404.json({ success: false, message: '客户不存在' });
      }
      
      const customer = customerResult.rows[0];
      res.json({ success: true, data: customer });
    } catch (error) {
      console.error('获取客户详情失败:', error);
      res.status(500).json({ success: false, message: '获取客户详情失败' });
    }
  });

  router.post('/', authenticate, async (req, res) => {
    try {
      const { name, contact_person, contact_phone, address } = req.body;
      
      if (!name) {
        return res.status(400).json({ success: false, message: '客户名称为必填项' });
      }
      
      const result = await db.query(
        'INSERT INTO customers (name, contact_person, contact_phone, address, created_at, updated_at) VALUES (?, ?, ?, ?, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)',
        [name, contact_person || '', contact_phone || '', address || '']
      );
      
      const newCustomerResult = await db.query('SELECT id, name, contact_person, contact_phone, address, created_at, updated_at FROM customers WHERE id = ?', [result.lastID]);
      const newCustomer = newCustomerResult.rows[0];
      
      console.log(`客户 ${name} 创建成功，由 ${req.user.username} 操作`);
      res.json({ success: true, data: newCustomer });
    } catch (error) {
      console.error('创建客户失败:', error);
      res.status(500).json({ success: false, message: '创建客户失败' });
    }
  });

  router.put('/:id', authenticate, async (req, res) => {
    try {
      const { id } = req.params;
      const { name, contact_person, contact_phone, address } = req.body;
      
      await db.query(
        'UPDATE customers SET name = ?, contact_person = ?, contact_phone = ?, address = ?, updated_at = CURRENT_TIMESTAMP WHERE id = ?',
        [name, contact_person, contact_phone, address, id]
      );
      
      const updatedCustomerResult = await db.query('SELECT id, name, contact_person, contact_phone, address, created_at, updated_at FROM customers WHERE id = ?', [id]);
      const updatedCustomer = updatedCustomerResult.rows[0];
      
      res.json({ success: true, data: updatedCustomer });
    } catch (error) {
      console.error('更新客户信息失败:', error);
      res.status(500).json({ success: false, message: '更新客户信息失败' });
    }
  });

  router.delete('/:id', authenticate, async (req, res) => {
    try {
      const { id } = req.params;
      
      const existingCustomer = await db.query('SELECT id FROM customers WHERE id = ?', [id]);
      if (existingCustomer.rows.length === 0) {
        return res.status(404).404.json({ success: false, message: '客户不存在' });
 });
      
      await db.query('DELETE FROM customers WHERE id = ?', [id]);
      
      res.json({ success: true, message: '客户删除成功' });
    } catch (error) {
      console.error('删除客户失败:', error);
      res.status(500).json({ success: false, message: '删除客户失败' });
    }
  });

  app.use('/api/customers', router);
};