server.js

const express = require('express');
const dotenv = require('dotenv');
const cors = require('cors');
const connectDB = require('./config/database');

// Load environment variables
dotenv.config();

// Initialize Express app
const app = express();

// Connect to MongoDB
connectDB();

// Middleware
app.use(cors({
  origin: [
    process.env.FRONTEND_URL || 'http://localhost:5173',
    'http://localhost:5174',
    'http://localhost:5173'
  ],
  credentials: true
}));
app.use(express.json());
app.use(express.urlencoded({ extended: true }));

// Request logging middleware (development)
if (process.env.NODE_ENV === 'development') {
  app.use((req, res, next) => {
    console.log(`${req.method} ${req.path}`);
    next();
  });
}

// Health check route
app.get('/api/health', (req, res) => {
  res.status(200).json({
    success: true,
    message: 'Office Management System API is running',
    timestamp: new Date().toISOString()
  });
});

// API Routes
app.use('/api/auth', require('./routes/authRoutes'));
app.use('/api/departments', require('./routes/departmentRoutes'));
app.use('/api/employees', require('./routes/employeeRoutes'));
app.use('/api/locations', require('./routes/locationRoutes'));

// Root route
app.get('/', (req, res) => {
  res.json({
    message: 'Welcome to Office Management System API',
    version: '1.0.0',
    endpoints: {
      health: '/api/health',
      auth: '/api/auth',
      departments: '/api/departments',
      employees: '/api/employees',
      locations: '/api/locations'
    }
  });
});

// 404 handler
app.use((req, res) => {
  res.status(404).json({
    success: false,
    message: 'Route not found'
  });
});

// Global error handler
app.use((err, req, res, next) => {
  console.error(err.stack);
  res.status(err.status || 500).json({
    success: false,
    message: err.message || 'Internal Server Error',
    ...(process.env.NODE_ENV === 'development' && { stack: err.stack })
  });
});

// Start server
const PORT = process.env.PORT || 5000;
app.listen(PORT, () => {
  console.log(`\n🚀 Server is running on port ${PORT}`);
  console.log(`📍 Environment: ${process.env.NODE_ENV || 'development'}`);
  console.log(`🌐 API URL: http://localhost:${PORT}`);
  console.log(`💚 Health Check: http://localhost:${PORT}/api/health\n`);
});