server.js

// Import required modules
const express = require('express');
const mongoose = require('mongoose');
const bcrypt = require("bcryptjs");

// Import configuration files
const serverConfig = require('./configs/server.config');
const dbConfig = require('./configs/db.config');

// Import models 
const Movie = require('./models/movie.models');
const Theatre = require('./models/theater.models');
const User = require('./models/user.models');
const Booking = require('./models/booking.models')

// Create an instance of the express application
const app = express();

// Middleware to parse JSON bodies
app.use(express.json()); // Used to parse JSON bodies
app.use(express.urlencoded({ extended: true })); // Used to parse URL-encoded bodies


/**
 * DB Connection initialization
 */

// if(process.env.NODE_ENV !== 'production'){
//     try{
//         mongoose.connect(dbConfig.DB_URL,
//         {useNewUrlParser : true, useUnifiedToplogy: true}
//         ()=>{
//             console.log("Connected to Mongo DB");
//             init();
//         }
        
//     }catch(err){
//         console.log("Couldnt connect with DB", err.message)
//     }
// }

if (process.env.NODE_ENV !== 'production') {
    const db = mongoose.connection;

    db.on('error', (err) => {
        console.error('Connection error:', err.message);
    });

    db.once('open', () => {
        console.log('Connected to Mongo DB');
        init();
    });

    mongoose.connect(dbConfig.DB_URL, { useNewUrlParser: true, useUnifiedTopology: true });
}




/**
 * This function will initialize the initial state of the movie booking application
 */
async function init() {
    await Movie.collection.drop();
    try {
        movie1 = await Movie.create({
            name: "Bachhan Pandey",
            description: "Comedy Masala Movie",
            casts: ["Akshay Kumar", "Jacqueline Fernandiz"],
            director: "Farhad Samji",
            trailerUrl: "http://bacchanpandey/trailers/1",
            posterUrl: "http://bacchanpandey/posters/1",
            language: "Hindi",
            releaseDate: "18-03-2022",
            releaseStatus: "RELEASED"
        });
        movie2 = await Movie.create({
            name: "Jalsa",
            description: "Intense Drama Movie",
            casts: ["Vidya Balan", "Shefali Shah"],
            director: "Suresh Triveni",
            trailerUrl: "http://jalsa/trailers/1",
            posterUrl: "http://jalsa/posters/1",
            language: "Hindi",
            releaseDate: "18-03-2022",
            releaseStatus: "RELEASED"
        });
        movie3 = await Movie.create({
            name: "Jhund",
            description: "Comedy Drama Movie",
            casts: ["Amitabh Bachchan", "Abhinay Raj"],
            director: "Nagraj Manjule",
            trailerUrl: "http://jhund/trailers/1",
            posterUrl: "http://jhund/posters/1",
            language: "Hindi",
            releaseDate: "04-03-2022",
            releaseStatus: "RELEASED"
        });
        movie4 = await Movie.create({
            name: "Radhe Shyam",
            description: "Comedy Drama Movie",
            casts: ["Prabhas", "Pooja Hegde"],
            director: "Radha Krishna Kumar",
            trailerUrl: "http://RadheShyam/trailers/1",
            posterUrl: "http://RadheShyam/posters/1",
            language: "Hindi",
            releaseDate: "11-03-2022",
            releaseStatus: "RELEASED"
        });
        movie5 = await Movie.create({
            name: "The Kashmir Files",
            description: "Intense Movie",
            casts: ["Mithun Chakraborty", "Anupam Kher"],
            director: "Vivek Agnihotri",
            trailerUrl: "http://TheKashmirFiles/trailers/1",
            posterUrl: "http://TheKashmirFiles/posters/1",
            language: "Hindi",
            releaseDate: "11-03-2022",
            releaseStatus: "RELEASED"
        });
        console.log("Movies inserted in the db");
    } catch (err) {
        console.error(err.message);
    }
    await Theatre.collection.drop();
    try{
await Theatre.create({
            name: "FunCinemas",
            city: "Bangalore",
            description: "Top class theatre",
            pinCode: 560052,
            movies : [movie1._id, movie2._id, movie3._id]

        });
        await Theatre.create({
            name: "PVR Cinemas - Kormangala",
            city: "Bangalore",
            description: "PVR franchise theatre",
            pinCode: 560095,
            movies : [movie1._id, movie2._id, movie4._id]

        });
        await Theatre.create({
            name: "IMax",
            city: "Bangalore",
            description: "IMax franchise theatre",
            pinCode: 560095,
            movies : [movie1._id, movie4._id]

        });
        await Theatre.create({
            name: "Vaibhav Theatre",
            city: "Bangalore",
            description: "Economical theatre",
            pinCode: 560094,
            movies : [movie5._id, movie4._id]
 
        });

        await Theatre.create({
            name: "Inox",
            city: "Pune",
            description: "Top class theatre",
            pinCode: 411001,
            movies : [movie5._id, movie2._id]

        });
        await Theatre.create({
            name: "Sonmarg Theatre",
            city: "Pune",
            description: "Economical theatre",
            pinCode: 411042,
            movies : [movie3._id, movie2._id]

        });

        console.log("Theatres created");
    }catch (err) {
        console.error(err.message);
    }
    /**
     * Creating one ADMIN user at the server boot time
     */
    await User.collection.drop();
    try {

       user = await User.create({
           name: "Admin",
           userId: "1", // It should be atleat 16, else will throw error
           email: "admin@gmail.com",  // If we don't pass this, it will throw the error
           userType: "ADMIN",
           password :bcrypt.hashSync("admin", 8) //this field should be hidden from the end user

       });
       console.log("ADMIN user created");

   } catch (err) {
       console.log(err.message);
   }
}

/**
 * Importing the routes
 */
require('./routes/movie.routes')(app);
require('./routes/theatre.routes')(app)
require('./routes/auth.routes')(app)
require('./routes/user.routes')(app)
require('./routes/booking.routes')(app)
require('./routes/payment.routes')(app)
/**
 * Start the Server
 */
app.listen(serverConfig.PORT, () => {
    console.log(`Application started on port num : ${serverConfig.PORT}`);
});