console.log('Starting password manager.');

var storage = require('node-persist'); // integrates node-persist module into this application
storage.initSync(); // prepares the computer to write and save variables

// Encryption/Decryption part
var crypto = require('crypto-js');
var secretKey = "abc";
var masterPassword = "123";

/*
var retrievedAccount = storage.getItemSync('account');
console.log("Account is ", retrievedAccount);
*/

var argv = require('yargs')
		.command('create','Creates a user account', function(yargs){
			yargs.options({
				name: {
					demand: true,
					alias: 'n',
					type: 'string',
					description: 'name eg Facebook or Twitter'
				},
				username: {
					demand: true,
					alias: 'u',
					type: 'string',
					description: 'username eg user12! or user12@gmail.com'
				},
				password: {
					demand: true,
					alias: 'p',
					type: 'string',
					description: 'password for account access'
				},
				masterPassword:{
					demand: true,
					alias: 'm',
					type: 'string',
					description: 'Master password is required for encryption / decryption'
				}
			}).help('help');
		})
		.command('get', 'get accounts with a matching name', function(yargs){
			yargs.options({
				name: {
					demand: true,
					alias: 'n',
					description: 'Specify an account name like Twitter, Facebook etc',
					type: 'string'
				},
				masterPassword:{
					demand: true,
					alias: 'm',
					type: 'string',
					description: 'Master password is required for encryption / decryption'
				}
			}).help('help');
		})
		.help('help')
		.argv;

var command = argv._[0];
console.log('From create function:  account = ' , argv);

function getAccounts(masterPassword){

}

function saveAccounts(accounts, masterPassword){
	if (masterPassword === argv.masterPassword){
		// convert object array into a string array
		var accountsStr = JSON.stringify(accounts);
		// check
		console.log("stringified form of accounts array: " + accountsStr);

		// encrypt the stringified accounts array
		var encryptedStr = crypto.AES.encrypt(accountsStr,secretKey);
		// check
		console.log('Encrypted string: ' + encryptedStr);

		// save the encrypted string
		storage.setItemSync('encryptedString',encryptedStr);
		// check
		var testofEncryptedString = storage.getItemSync('encryptedString');
		console.log('Retrieved encrypted string: ' + testofEncryptedString);
	} else {
		return 'Wrong password, account has not been saved.';
	}

}

function createAccount(account, masterPassword){
	if(masterPassword === argv.masterPassword){
		// create the account
		console.log("from createAccount.!!");
		console.log("Created account: ", account);

		// check that accounts array exists, if not create it
		var accounts = storage.getItemSync('accounts');

		if(typeof accounts === 'undefined'){
			accounts = [];
		} else {
			accounts;
		}

		// push account onto array accounts
		accounts.push(account);
		// check contents of accounts
		console.log('accounts array contains: ', accounts);

		// save the accounts array
		saveAccounts(accounts, argv.masterPassword);
		return accounts;
	} else {
		return 'Incorrect password provided. Account creation cancelled.';
	}
}

if(command === 'create'){
	var createdAccount = createAccount({
		name: argv.name,
		username: argv.username,
		password: argv.password,
	}, argv.masterPassword);

	console.log("Account created.");