server.js

//server
const express = require('express');
const dotenv = require('dotenv');
const cors = require('cors');

const authRoutes = require("./routes/authRoutes");
const availabilityRoutes = require('./routes/availabilityRoutes');
const bookingRoutes = require('./routes/bookingRoutes');
const userRoutes = require('./routes/userRoutes');

dotenv.config();  // Loads .env secrets
const app = express(); // Initializes Express

const allowedOrigins = process.env.ALLOWED_ORIGINS.split(',');

// CORS middleware
const corsOptions = {
    origin: function(origin, callback) {
        if(!origin) return callback(null, true);
        if(allowedOrigins.includes(origin)){
            return callback(null, true);
        } else {
            return callback(new Error('Not allowed by CORS'));
        }
    },
    credentials: true
};

app.use(cors(corsOptions));

// Middleware
app.use(express.json());  //built-in middleware, Parses incoming JSON

// Test Route
app.get('/', (req, res) => {
    res.send("API is running...")
});

// Routes
app.use("/api/auth", authRoutes); // Routes go here
app.use('/api/availability', availabilityRoutes);
app.use('/api/booking', bookingRoutes);
app.use('/api/users', userRoutes);

// connect to MongoDB
const connectDB = require('./config/db');
connectDB(); // Connects to MongoDB

// Start server
const PORT = process.env.PORT || 5000;
app.listen(PORT, () => console.log(`Server running on port ${PORT}`)); // Server listens