const express = require('express');
const mongoose = require('mongoose');
const cors = require('cors');
const helmet = require('helmet');
const rateLimit = require('express-rate-limit');
const compression = require('compression');
const morgan = require('morgan');
require('dotenv').config();

// Import routes
const authRoutes = require('./routes/auth');
const roomRoutes = require('./routes/rooms');
const bookingRoutes = require('./routes/bookings');
const guestRoutes = require('./routes/guests');
const paymentRoutes = require('./routes/payments');
const adminRoutes = require('./routes/admin');
const integrationRoutes = require('./routes/integrations');
const contactRoutes = require('./routes/contact');
const galleryRoutes = require('./routes/gallery');
const contentRoutes = require('./routes/content');
const blogRoutes = require('./routes/blog');
const mediaRoutes = require('./routes/media');
const settingsRoutes = require('./routes/settings');
const uploadRoutes = require('./routes/upload');
const roomCategoryRoutes = require('./routes/roomCategories');
const galleryCategoryRoutes = require('./routes/galleryCategories');

// Import middleware
const errorHandler = require('./middleware/errorHandler');
const logger = require('./utils/logger');

const app = express();
const PORT = process.env.PORT || 5080;

// Security middleware
app.use(helmet());
app.use(compression());

// Rate limiting
const limiter = rateLimit({
  windowMs: 15 * 60 * 1000, // 15 minutes
  max: 100, // limit each IP to 100 requests per windowMs
  message: 'Too many requests from this IP, please try again later.',
});
app.use('/api/', limiter);

// CORS configuration
app.use(cors({
  origin: process.env.CLIENT_URL || 'http://localhost:3000',
  credentials: true,
}));

// Body parsing middleware
app.use(express.json({ limit: '10mb' }));
app.use(express.urlencoded({ extended: true, limit: '10mb' }));

// Logging
if (process.env.NODE_ENV !== 'test') {
  app.use(morgan('combined', { stream: { write: message => logger.info(message.trim()) } }));
}

// Database connection
mongoose.connect(process.env.MONGODB_URI || 'mongodb://localhost:27017/oldvinehotel', {
  useNewUrlParser: true,
  useUnifiedTopology: true,
})
.then(() => {
  logger.info('Connected to MongoDB');
})
.catch((error) => {
  logger.error('MongoDB connection error:', error);
});

// Health check endpoint
app.get('/health', (req, res) => {
  res.status(200).json({
    status: 'OK',
    timestamp: new Date().toISOString(),
    uptime: process.uptime(),
    version: process.env.npm_package_version || '1.0.0'
  });
});

// API routes
app.use('/api/auth', authRoutes);
app.use('/api/rooms', roomRoutes);
app.use('/api/room-categories', roomCategoryRoutes);
app.use('/api/gallery-categories', galleryCategoryRoutes);
app.use('/api/bookings', bookingRoutes);
app.use('/api/guests', guestRoutes);
app.use('/api/payments', paymentRoutes);
app.use('/api/admin', adminRoutes);
app.use('/api/integrations', integrationRoutes);
app.use('/api/contact', contactRoutes);
app.use('/api/gallery', galleryRoutes);
app.use('/api/content', contentRoutes);
app.use('/api/blog', blogRoutes);
app.use('/api/media', mediaRoutes);
app.use('/api/settings', settingsRoutes);
app.use('/api/upload', uploadRoutes);

// Welcome route
app.get('/', (req, res) => {
  res.json({
    message: 'Welcome to The Old Vine Hotel API',
    version: '1.0.0',
    documentation: '/api/docs',
    endpoints: {
      rooms: '/api/rooms',
      bookings: '/api/bookings',
      auth: '/api/auth',
      payments: '/api/payments',
      integrations: '/api/integrations'
    }
  });
});

// Error handling middleware (must be last)
app.use(errorHandler);

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

// Graceful shutdown
process.on('SIGTERM', () => {
  logger.info('SIGTERM received, shutting down gracefully');
  mongoose.connection.close(() => {
    logger.info('Database connection closed');
    process.exit(0);
  });
});

if (process.env.NODE_ENV !== 'test') {
  app.listen(PORT, () => {
    logger.info(`Server running on port ${PORT}`);
    logger.info(`Environment: ${process.env.NODE_ENV || 'development'}`);
  });
}

module.exports = app;