import express from 'express';
import cors from 'cors';
import helmet from 'helmet';
import dotenv from 'dotenv';
import path from 'path';
import reportRoutes from './routes/reportRoutes';
import eventRoutes from './routes/eventRoutes';
import userRoutes from './routes/userRoutes';
import externalDataRoutes from './routes/externalDataRoutes';

// Load environment variables
dotenv.config();

const app = express();
const PORT = process.env.PORT || 3005;

// Middleware
app.use(helmet({
  crossOriginResourcePolicy: { policy: "cross-origin" },
  contentSecurityPolicy: false, // Disable CSP for development
}));
app.use(cors({
  origin: [
    'http://localhost:5173',
    'http://localhost:5174',
    process.env.CORS_ORIGIN || ''
  ].filter(Boolean),
  credentials: true,
}));
app.use(express.json());
app.use(express.urlencoded({ extended: true }));

// Serve uploaded files - use process.cwd() to get the correct path
const uploadDir = process.env.UPLOAD_DIR || path.join(process.cwd(), 'uploads');
app.use('/uploads', express.static(uploadDir));

// Health check
app.get('/health', (req, res) => {
  res.json({ status: 'ok', timestamp: new Date().toISOString() });
});

// API Routes
app.use('/api/reports', reportRoutes);
app.use('/api/events', eventRoutes);
app.use('/api/users', userRoutes);
app.use('/api/external', externalDataRoutes);

// Error handling middleware
app.use((err: any, req: express.Request, res: express.Response, next: express.NextFunction) => {
  console.error('Error:', err);
  
  if (err.name === 'MulterError') {
    if (err.code === 'LIMIT_FILE_SIZE') {
      return res.status(400).json({
        error: {
          code: 'FILE_TOO_LARGE',
          message: 'File size exceeds the maximum limit of 5MB',
          timestamp: new Date().toISOString(),
        },
      });
    }
  }

  res.status(500).json({
    error: {
      code: 'INTERNAL_SERVER_ERROR',
      message: err.message || 'An unexpected error occurred',
      timestamp: new Date().toISOString(),
    },
  });
});

// Start server
app.listen(PORT, () => {
  console.log(`🚀 Server running on port ${PORT}`);
  console.log(`📍 Environment: ${process.env.NODE_ENV || 'development'}`);
  console.log(`🔗 API: http://localhost:${PORT}/api`);
});

export default app;