import express, { Request, Response } from 'express';
import cors from 'cors';
import helmet from 'helmet';
import apiRoutes from './routes/api';
import errorHandler from './middleware/errorHandler';

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

// Middleware
app.use(helmet()); // Security headers
app.use(cors()); // Enable CORS
app.use(express.json()); // Parse JSON bodies
app.use(express.urlencoded({ extended: true })); // Parse URL-encoded bodies

// Routes
app.get('/', (req: Request, res: Response) => {
  res.json({
    message: 'Welcome to TypeScript + ESBuild Express API!',
    version: '1.0.0',
    language: 'TypeScript',
    buildTool: 'ESBuild',
    endpoints: {
      health: '/health',
      api: '/api'
    }
  });
});

app.get('/health', (req: Request, res: Response) => {
  res.json({
    status: 'OK',
    timestamp: new Date().toISOString(),
    uptime: process.uptime(),
    language: 'TypeScript',
    buildTool: 'ESBuild'
  });
});

// API routes
app.use('/api', apiRoutes);

// Error handling middleware
app.use(errorHandler);

// 404 handler
app.use('*', (req: Request, res: Response) => {
  res.status(404).json({
    error: 'Route not found',
    path: req.originalUrl
  });
});

app.listen(port, () => {
  console.log(`🚀 TypeScript + ESBuild Server is running on port ${port}`);
  console.log(`📍 Health check: http://localhost:${port}/health`);
  console.log(`🔗 API endpoint: http://localhost:${port}/api`);
});