const express = require('express');
const cors = require('cors');
const path = require('path');
const authRouter = require('./routes/auth');

const app = express();
const PORT = process.env.PORT || 3000;

// 中间件
app.use(cors());
app.use(express.json());
app.use(express.urlencoded({ extended: true }));

// 请求日志
app.use((req, res, next) => {
  console.log(`[${new Date().toISOString()}] ${req.method} ${req.path}`);
  next();
});

// 路由
app.use('/api/auth', authRouter);

// 健康检查
app.get('/health', (req, res) => {
  res.json({ code: 0, message: 'ok', timestamp: new Date().toISOString() });
});

// 404
app.use((req, res) => {
  res.status(404).json({ code: 404, message: '接口不存在' });
});

// 错误处理
app.use((err, req, res, next) => {
  console.error('[Error]', err);
  res.status(500).json({ code: 500, message: '服务器内部错误' });
});

app.listen(PORT, () => {
  console.log(`[Server] 后端服务已启动，端口: ${PORT}`);
  console.log(`[Server] 环境: ${process.env.NODE_ENV || 'development'}`);
});

module.exports = app;