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 suppliersResult = await db.query('SELECT id, name, contact_person, contact_phone, address, created_at, updated_at FROM suppliers');
      const suppliers = suppliersResult.rows;
      res.json({ success: true, data: suppliers, count: suppliers.length });
    } catch (error) {
      console.error('获取供应商列表失败:', error);
      res.status(500).json({ success: false, message: '获取供应商列表失败' });
    }
  });

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

  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: '供应商名称为必填项' });
      }
      
      const result = await db.query(
        'INSERT INTO suppliers (name, contact_person, contact_phone, address, created_at, updated_at) VALUES (?, ?, ?, ?, CURRENT_TIMESTAMP, CURRENT_TIMESTAMP)',
        [name, contact_person || '', contact_phone || '', address || '']
      );
      
      const newSupplierResult = await db.query('SELECT id, name, contact_person, contact_phone, address, created_at, updated_at FROM suppliers WHERE id = ?', [result.lastID]);
      const newSupplier = newSupplierResult.rows[0];
      
      console.log(`供应商 ${name} 创建成功，由 ${req.user.username} 操作`);
      res.json({ success: true, data: newSupplier });
    } catch (error) {
      console.error(''创建供应商失败:', error);
      res.status(500).json({ success: false, message: '创建供应商失败' });
    }
  });

  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 suppliers SET name = ?, contact_person = ?, contact_phone = ?, address = ?, updated_at = CURRENT_TIMESTAMP WHERE id = ?',
        [name, contact_person, contact_phone, address, id]
      );
      
      const updatedSupplierResult = await db.query('SELECT id, name, contact_person, contact_phone, address, created_at, updated_at FROM suppliers WHERE id = ?', [id]);
      const updatedSupplier = updatedSupplierResult.rows[0];
      
      res.json({ success: true, data: updatedSupplier });
    } catch (error) {
      console.error('更新供应商信息失败:', error);
      res.status(500).json({ success: false, message: '更新供应商信息失败' });
    }
  });

  router.delete('/:id', authenticate, async (req, res) => {
    try {
      const { id } = req.params;
      
      const existingSupplier = await db.query('SELECT id FROM suppliers WHERE id = ?', [id]);
      if (existingSupplier.rows.length === 0) {
        return res.status(404).json({ success: false, message: '供应商不存在' });
      }
      
      await db.query('DELETE FROM suppliers WHERE id = ?', [id]);
      
      res.json({ success: true, message: '供应商删除成功' });
    } catch (error) {
      console.error('删除供应商失败:', error);
      res.status(500).json({ success: false, message: '删除供应商失败' });
    }
  });

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