server.js

const path = require('path');
const express = require('express');
const session = require('express-session');
const http = require('http');
const { Server } = require('socket.io');

// Import configuration and database
const connectDB = require('./server/config/database');

// Import routes
const authRoutes = require('./server/routes/auth');
const postRoutes = require('./server/routes/posts');
const workoutRoutes = require('./server/routes/workouts');
const userRoutes = require('./server/routes/users');
const reviewRoutes = require('./server/routes/reviews');
const appointmentRoutes = require('./server/routes/appointments');
const gymRoutes = require('./server/routes/gyms');
const messageRoutes = require('./server/routes/messages');
const packageRoutes = require('./server/routes/packages');
const subscriptionRoutes = require('./server/routes/subscriptions');
const notificationRoutes = require('./server/routes/notifications');

// Initialize app
const app = express();
const serverHttp = http.createServer(app);
const socketServer = new Server(serverHttp);

// Connect to database
connectDB();

// Middleware
app.use(express.json());
app.use(express.urlencoded({ extended: true }));

// Session configuration
app.use(
    session({
        secret: 'myworkoutplan-secret-key-2024',
        resave: false,
        saveUninitialized: false,
        cookie: {
            secure: false, // Set to true in production with HTTPS
            maxAge: 24 * 60 * 60 * 1000 // 24 hours
        }
    })
);

// Static files
app.use(express.static(path.join(__dirname, 'public')));
app.use('/uploads', express.static(path.join(__dirname, 'public/uploads')));

// Store socket.io instance for access in routes
app.set('io', socketServer);

// API Routes
app.use('/api/auth', authRoutes);
app.use('/api/posts', postRoutes);
app.use('/api/workouts', workoutRoutes);
app.use('/api/users', userRoutes);
app.use('/api/reviews', reviewRoutes);
app.use('/api/appointments', appointmentRoutes);
app.use('/api/gyms', gymRoutes);
app.use('/api/messages', messageRoutes);
app.use('/api/packages', packageRoutes);
app.use('/api/subscriptions', subscriptionRoutes);
app.use('/api/notifications', notificationRoutes);

// Socket.io for real-time chat
socketServer.on('connection', (socket) => {
    console.log('User connected:', socket.id);

    // Join personal room
    socket.on('join', (userId) => {
        socket.join(userId);
        console.log(`User ${userId} joined room`);
    });

    // Send message
    socket.on('sendMessage', (data) => {
        const { toUserId, fromUserId, message } = data;
        socket.to(toUserId).emit('receiveMessage', {
            from: fromUserId,
            message,
            timestamp: new Date()
        });
    });

    // Typing indicator
    socket.on('typing', (data) => {
        const { toUserId, fromUserId } = data;
        socket.to(toUserId).emit('userTyping', {
            userId: fromUserId
        });
    });

    socket.on('stopTyping', (data) => {
        const { toUserId, fromUserId } = data;
        socket.to(toUserId).emit('userStopTyping', {
            userId: fromUserId
        });
    });

    socket.on('disconnect', () => {
        console.log('User disconnected:', socket.id);
    });
});

// Error handling middleware
app.use((err, req, res, next) => {
    console.error('Server error:', err);
    res.status(500).json({ error: 'Something went wrong!' });
});

// Serve home page (landing page)
app.get('/', (req, res) => {
    // If user is logged in, redirect to app
    if (req.session && req.session.userId) {
        return res.redirect('/app.html');
    }
    res.sendFile(path.join(__dirname, 'public', 'index.html'));
});

// Serve login/register page
app.get('/login', (req, res) => {
    // If user is logged in, redirect to app
    if (req.session && req.session.userId) {
        return res.redirect('/app.html');
    }
    res.sendFile(path.join(__dirname, 'public', 'login.html'));
});

// Redirect old /home to /
app.get('/home', (req, res) => {
    res.redirect('/');
});

// 404 handler
app.use((req, res) => {
    res.status(404).sendFile(path.join(__dirname, 'public', 'index.html'));
});

// Start server
const PORT = process.env.PORT || 3000;
serverHttp.listen(PORT, () => {
    console.log(`Server running on http://localhost:${PORT}`);
    console.log(`Serving static files from: ${path.join(__dirname, 'public')}`);
});