Codecademy - 10th Exercise (Rock, paper, scissors)

// Create my function using an ARROW FUNCTION
// It is not necessary to write "= (userInput) =>"
// because I have only 1 parameter

const getUserChoice = userInput => {
  // Lowercase option: User can type "rock" or "Rock" or sth else
  const initialInput = userInput;
  userInput = userInput.toLowerCase();
  // Check if we have a valid string typed in
  if(userInput === "rock" || userInput === "paper" || userInput === "scissors" || userInput === "bomb"){
    return userInput;
  }
  else{
    console.log("Invalid option. You typed in '" + initialInput + "'");
  }

};


// Classic way for function declaring
function getComputerChoice(){
  let choice = Math.floor(Math.random() * 3);
  switch(choice){
    case 0:
      return "rock";
      break;
    case 1:
      return "paper";
      break;
    case 2:
      return "scissors";
      break;
    default:
      console.log("Invalid option.");
      break;
  }
}

// Function, that determines the winner
function determineWinner(userChoice, computerChoice){

  // Firstly, I will check if someone has found
  // the secret cheat code = "bomb"
  if(userChoice === "bomb"){
    console.log("User wins! He found the secret key-word to win!");
  }

  // If the game is a tie (3 tie-combinations out  of the possible 9 ways)
  if(userChoice === computerChoice){
    console.log("It's a tie! Both sides chose: '" + userChoice + "'");
  }

  // 6 different combinations of NOT THE SAME CHOICE by user and computer
  else{
    // 1st combination of not a tie-game
    if(userChoice === "rock" && computerChoice === "scissors"){
      console.log("User wins")
    }
    // 2nd combination
    else if(userChoice === "rock" && computerChoice === "paper"){
      console.log("Computer wins");
    }
    // 3rd combination
    else if(userChoice === "scissors" && computerChoice === "paper"){
      console.log("User wins");
    }
    // 4th combination
    else if(userChoice === "scissors" && computerChoice === "rock"){
      console.log("Computer wins");
    }
    // 5th combination
    else if(userChoice === "paper" && computerChoice === "rock"){
      console.log("User wins");
    }
    // 6th combination
    else if(userChoice === "paper" && computerChoice === "scissors"){
      console.log("Computer wins");
    }

  } // End of else-case
}


function playGame(){
  const userChoice = getUserChoice("rock");
  const computerChoice = getComputerChoice();
  console.log("  User chooses  : " + userChoice);
  console.log("Computer chooses: " + computerChoice);
  console.log();
  determineWinner(userChoice, computerChoice);
}

// Main part of the game
playGame();