const express = require('express');
const cors = require('cors');
const path = require('path');
const morgan = require('morgan');
const fs = require('fs');

// 初始化日志目录
const logsDir = path.join(__dirname, 'logs');
if (!fs.existsSync(logsDir)) {
  fs.mkdirSync(logsDir, { recursive: true });
}

// 初始化数据库
require('./db/init');

const authRoutes = require('./routes/auth');
const ticketRoutes = require('./routes/tickets');
const lotteryRoutes = require('./routes/lottery');
const ocrRoutes = require('./routes/ocr');
const { standardLimiter } = require('./middleware/rateLimiter');
const errorHandler = require('./middleware/errorHandler');
const logger = require('./services/logger');

const app = express();
const PORT = process.env.PORT || 4444;

// 创建 morgan stream 用于日志
const morganStream = {
  write: (message) => logger.http(message.trim())
};

// 中间件
app.use(cors());
app.use(express.json({ limit: '10mb' }));
app.use(express.urlencoded({ extended: true, limit: '10mb' }));
app.use(morgan('combined', { stream: morganStream }));
app.use('/uploads', express.static(path.join(__dirname, 'uploads')));

// 全局限流 (应用于所有API)
app.use('/api', standardLimiter);

// API 路由
app.use('/api/auth', authRoutes);
app.use('/api/tickets', ticketRoutes);
app.use('/api/lottery', lotteryRoutes);
app.use('/api/ocr', ocrRoutes);

// 健康检查
app.get('/api/health', (req, res) => {
  res.json({ status: 'ok', time: new Date().toISOString() });
});

// 静态文件服务 - 前端构建产物
const clientDist = path.join(__dirname, '../client/dist');
app.use(express.static(clientDist));

// SPA 路由 - 所有非 API 请求返回 index.html
app.get('*', (req, res) => {
  res.sendFile(path.join(clientDist, 'index.html'));
});

// 全局错误处理 (必须放在最后)
app.use(errorHandler);

app.listen(PORT, '0.0.0.0', () => {
  logger.info(`服务器运行在 http://0.0.0.0:${PORT}`);
});