script.js

const getHumanChoice = humanChoice => {
    humanChoice = humanChoice.toLowerCase();

    if (
        humanChoice === 'rock' ||
        humanChoice === 'paper' ||
        humanChoice === 'scissors') {
            return humanChoice;
        } else {
            return null
        }
}


const getComputerChoice = () => {
    let computerChoice = Math.floor(Math.random() * 3);

    if (computerChoice === 0) {
        computerChoice = 'rock';
    } else if (computerChoice === 1) {
        computerChoice = 'paper';
    } else if (computerChoice === 2){
        computerChoice = 'scissors';
    }

    return computerChoice;
}

const determineWinner = (humanChoice, computerChoice) => {
    if (humanChoice === computerChoice) {
        return 'TIE!';
    } else if (
        humanChoice === 'rock' &&
        computerChoice === 'scissors') {
            return 'WINNER!';
        } else if (
            humanChoice === 'paper' && 
            computerChoice === 'rock') {
                return 'WINNER!'; 
            } else if (
                humanChoice === 'scissors' && 
                computerChoice === 'paper') {
                    return 'WINNER!'; 
                } else {
                    return 'LOSER :('
                }
}

const playGame = () => {
    let humanChoice = getHumanChoice('rock');
    if (humanChoice === null) {
        return;
    }

    let computerChoice = getComputerChoice()

    let results = determineWinner(humanChoice, computerChoice);

    return console.log(`Human Chooses ${humanChoice} and the computer has chosen ${computerChoice}... The results are in: ${results}`)
}

playGame()