app.js

const startGameBtn = document.getElementById('start-game-btn');

const ROCK = 'ROCK';
const PAPER = 'PAPER';
const SCISSORS = 'SCISSORS';
const DEFAULT_USER_CHOICE = ROCK;
const RESULT_DRAW = 'DRAW';
const RESULT_PLAYER_WINS = 'PLAYER_WINS';
const RESULT_COMPUTER_WINS ='COMPUTER_WINS';

let gameIsRunning = false;


const getPlayerChoice = ()=>{
    const selection = prompt(`${ROCK} , ${PAPER} Or ${SCISSORS}?`,'').toUpperCase();
    if (
        selection !== 'ROCK' &&
        selection !== 'PAPER' &&
        selection !== 'SCISSORS'
    ) {
        alert('Invalid choice! we chose ${DEFAULT_USER_CHOICE} ROCK for you!');
    return  DEFAULT_USER_CHOICE;
    }
    return selection;
    };

    const getComputerChoice = ()=>{
        const randomValue = Math.random();
        if(randomValue < 0.34){
            return ROCK;
        } else if (randomValue < 0.67){
            return PAPER;
        }   else {
            return SCISSORS;
        }
    };

   

    const getWinner = (
        cChoice,
        pChoice =  DEFAULT_USER_CHOICE
         ) =>
         cChoice === pChoice 
        ? RESULT_DRAW 
        :   (cChoice ===ROCK && pChoice=== PAPER)||
            (cChoice===SCISSORS && pChoice === SCISSORS ||
            cChoice === SCISSORS && pChoice === ROCK) 
            ? RESULT_PLAYER_WINS 
            : RESULT_COMPUTER_WINS;

            /*
        if (cChoice === pChoice){
            return RESULT_DRAW;
        }else if(
                cChoice === ROCK && pChoice===PAPER || 
                 cChoice===SCISSORS && pChoice === SCISSORS ||
                 cChoice === SCISSORS && pChoice === ROCK)
                 {
        return RESULT_PLAYER_WINS;
                 }else {
                    return RESULT_COMPUTER_WINS;
                 } */
            

startGameBtn.addEventListener('click', ()=> {
    if (gameIsRunning) {
    return;
    }
    gameIsRunning = true;
    console.log('Game is starting..');
    const playerChoice = getPlayerChoice();
    //console.log(playerSelection);
    const computerChoice = getComputerChoice();
    let winner;
    if(playerChoice){
        winner = getWinner (computerChoice,playerChoice);
    }else {
        winner = getWinner(computerChoice);
    }
    //const winner = getWinner(computerChoice, playerChoice);
    let message = `You picked ${playerChoice || DEFAULT_USER_CHOICE}, computer picked $(computerChoice),therefor you`;
    if(winner===RESULT_DRAW){
        message = message + 'had a draw';
    } else if (winner === RESULT_PLAYER_WINS){
        message = message + 'won';
    }else {
        message = message + 'lost';
    }
    alert (message);
    gameIsRunning = false;
});

// not releted to game

const combine = (resultHnadler,operation,   ...numbers ) => {
const validateNumber = (number) => {
    return isNaN(number) ? 0 : number;
};



let sum = 0;
for (const num of numbers){
    if(operation === 'ADD') {
    sum += validateNumber(num);
    } else {
        sum -= validateNumber(num);
    }
}
resultHnadler(sum);
};


/*
const subtractUp = function(resultHnadler, ...numbers){
    let sum = 0;
for (const num of numbers){ //dont use that
    sum -= num;
    }
resultHnadler(sum,  'The result after adding all number is');
}; */

const showResult = (messageText, result ) => {
    alert(messageText + ' ' +result);
};


combine(
    showResult.bind(this, 'The result after adding all numbers is: '),
'ADD',
1, 
5,
'fdsa', 
-3, 
6, 
10);
combine(
    showResult.bind(this, 'The result after adding all numbers is: '),
'ADD',
1, 
5, 
-10,
-3,
6,
10,
25,
88);
combine(
    showResult.bind(this, 'The result after adding all numbers is: '),
'SUBTRACT',
1,
10,
15,
20);