#!/usr/bin/env node

/**
 * 爱鉴花后端服务主入口文件
 * 基于Express.js的RESTful API服务
 */

const express = require('express');
const cors = require('cors');
const helmet = require('helmet');
const compression = require('compression');
const morgan = require('morgan');
const path = require('path');
require('dotenv').config();

// Swagger配置
const { specs, swaggerUi } = require('./config/swagger');

// 导入路由模块
const authRoutes = require('./routes/auth');
const userRoutes = require('./routes/users');
const productRoutes = require('./routes/products');
const orderRoutes = require('./routes/orders');
const identificationRoutes = require('./routes/identifications');
const adminRoutes = require('./routes/admin');

// 导入中间件
const { errorHandler } = require('./middlewares/errorHandler');
const { authMiddleware } = require('./middlewares/auth');

const app = express();
const PORT = process.env.PORT || 3201;

// 安全中间件
app.use(helmet());
app.use(compression());

// CORS配置
app.use(cors({
  origin: process.env.NODE_ENV === 'production' 
    ? ['https://your-domain.com'] 
    : ['http://localhost:9000', 'http://127.0.0.1:9000'],
  credentials: true
}));

// 日志中间件
app.use(morgan(process.env.NODE_ENV === 'production' ? 'combined' : 'dev'));

// 解析请求体
app.use(express.json({ limit: '10mb' }));
app.use(express.urlencoded({ extended: true, limit: '10mb' }));

// 静态文件服务
app.use('/uploads', express.static(path.join(__dirname, 'uploads')));

// 健康检查接口
app.get('/health', (req, res) => {
  res.json({
    status: 'OK',
    timestamp: new Date().toISOString(),
    uptime: process.uptime(),
    environment: process.env.NODE_ENV || 'development'
  });
});

// API文档
app.use('/api-docs', swaggerUi.serve, swaggerUi.setup(specs, {
  explorer: true,
  customCss: '.swagger-ui .topbar { display: none }',
  customSiteTitle: '爱鉴花API文档'
}));

// API路由配置
app.use('/api/v1/auth', authRoutes);
app.use('/api/v1/users', authMiddleware, userRoutes);
app.use('/api/v1/products', productRoutes);
app.use('/api/v1/orders', authMiddleware, orderRoutes);
app.use('/api/v1/identifications', authMiddleware, identificationRoutes);
app.use('/api/v1/admin', authMiddleware, adminRoutes);

// 404处理
app.use('*', (req, res) => {
  res.status(404).json({
    code: 404,
    message: '接口不存在',
    data: null,
    timestamp: Date.now()
  });
});

// 全局错误处理
app.use(errorHandler);

// 启动服务
app.listen(PORT, () => {
  console.log(`🚀 爱鉴花后端服务已启动`);
  console.log(`📍 环境: ${process.env.NODE_ENV || 'development'}`);
  console.log(`🌐 地址: http://localhost:${PORT}`);
  console.log(`📚 API文档: http://localhost:${PORT}/api-docs`);
  console.log(`❤️  健康检查: http://localhost:${PORT}/health`);
  console.log('─'.repeat(50));
});

// 优雅关闭
process.on('SIGINT', () => {
  console.log('\n🛑 正在关闭服务...');
  process.exit(0);
});

module.exports = app;