const express = require('express');
const router = express.Router();
const dbConnector = require('../utils/dbConnector');

// 获取用户收货地址列表
router.get('/', async (req, res) => {
  try {
    const userId = req.user.id;
    
    const addresses = await dbConnector.query(`
      SELECT id, recipient, phone, province, city, district, detail, is_default, created_at
      FROM addresses 
      WHERE user_id = ? 
      ORDER BY is_default DESC, created_at DESC
    `, [userId]);
    
    res.json({
      code: 200,
      message: '获取成功',
      data: addresses
    });
  } catch (error) {
    console.error('获取地址列表失败:', error);
    res.status(500).json({
      code: 500,
      message: '服务器内部错误',
      error: error.message
    });
  }
});

// 添加收货地址
router.post('/', async (req, res) => {
  try {
    const { recipient, phone, province, city, district, detail, is_default } = req.body;
    const userId = req.user.id;
    
    // 如果设置为默认地址，先取消其他默认地址
    if (is_default) {
      await dbConnector.query(
        'UPDATE addresses SET is_default = 0 WHERE user_id = ?',
        [userId]
      );
    }
    
    const result = await dbConnector.query(
      `INSERT INTO addresses 
       (user_id, recipient, phone, province, city, district, detail, is_default, created_at, updated_at) 
       VALUES (?, ?, ?, ?, ?, ?, ?, ?, NOW(), NOW())`,
      [userId, recipient, phone, province, city, district, detail, is_default || 0]
    );
    
    res.status(201).json({
      code: 201,
      message: '添加成功',
      data: {
        address_id: result.insertId
      }
    });
  } catch (error) {
    console.error('添加地址失败:', error);
    res.status(500).json({
      code: 500,
      message: '服务器内部错误',
      error: error.message
    });
  }
});

// 更新收货地址
router.put('/:id', async (req, res) => {
  try {
    const { id } = req.params;
    const { recipient, phone, province, city, district, detail, is_default } = req.body;
    const userId = req.user.id;
    
    // 检查地址是否存在
    const address = await dbConnector.query(
      'SELECT * FROM addresses WHERE id = ? AND user_id = ?',
      [id, userId]
    );
    
    if (address.length === 0) {
      return res.status(404).json({
        code: 404,
        message: '地址不存在'
      });
    }
    
    // 如果设置为默认地址，先取消其他默认地址
    if (is_default) {
      await dbConnector.query(
        'UPDATE addresses SET is_default = 0 WHERE user_id = ?',
        [userId]
      );
    }
    
    await dbConnector.query(
      `UPDATE addresses SET 
       recipient = ?, phone = ?, province = ?, city = ?, district = ?, detail = ?, is_default = ?, updated_at = NOW()
       WHERE id = ? AND user_id = ?`,
      [recipient, phone, province, city, district, detail, is_default || 0, id, userId]
    );
    
    res.json({
      code: 200,
      message: '更新成功'
    });
  } catch (error) {
    console.error('更新地址失败:', error);
    res.status(500).json({
      code: 500,
      message: '服务器内部错误',
      error: error.message
    });
  }
});

// 删除收货地址
router.delete('/:id', async (req, res) => {
  try {
    const { id } = req.params;
    const userId = req.user.id;
    
    await dbConnector.query(
      'DELETE FROM addresses WHERE id = ? AND user_id = ?',
      [id, userId]
    );
    
    res.json({
      code: 200,
      message: '删除成功'
    });
  } catch (error) {
    console.error('删除地址失败:', error);
    res.status(500).json({
      code: 500,
      message: '服务器内部错误',
      error: error.message
    });
  }
});

// 设置默认地址
router.put('/:id/default', async (req, res) => {
  try {
    const { id } = req.params;
    const userId = req.user.id;
    
    // 先取消所有默认地址
    await dbConnector.query(
      'UPDATE addresses SET is_default = 0 WHERE user_id = ?',
      [userId]
    );
    
    // 设置当前地址为默认
    await dbConnector.query(
      'UPDATE addresses SET is_default = 1, updated_at = NOW() WHERE id = ? AND user_id = ?',
      [id, userId]
    );
    
    res.json({
      code: 200,
      message: '设置默认地址成功'
    });
  } catch (error) {
    console.error('设置默认地址失败:', error);
    res.status(500).json({
      code: 500,
      message: '服务器内部错误',
      error: error.message
    });
  }
});

module.exports = router;