script.js

// User inputs one of "scissors", "paper", or "stone",
// Program internally randomly chooses scissors, paper, or stone,
// Program outputs whether the user won, the program won, or it's a draw.
// Rules: scissors beats paper, paper beats stone, and stone beats scissors.
// If both parties choose the same object, it's a draw.

var currentGameMode = "Waiting for user name..";
console.log(currentGameMode);
var userName = "";

// HELPER FUNCTIONS HERE
var chooseScissorsPaperStone = function () {
  var randomDecimal = Math.random() * 3; // computer random selection
  var randomInteger = Math.floor(randomDecimal);
  var randomScissorsPaperStone = randomInteger + 1; // Add 1 to get valid numbers 1 to 3 inclusive, which represents each action
  return randomScissorsPaperStone; // return 3 random values to represent each action
};

var generateScissorsPaperStone = function () {
  var scissorsPaperStone = chooseScissorsPaperStone(); // assigning values to variables here
  if (scissorsPaperStone == 1) {
    return "scissors";
  }

  if (scissorsPaperStone == 2) {
    return "paper";
  }

  if (scissorsPaperStone == 3) {
    return "stone";
  }
};

var userWinCounter = 0;
var computerWinCounter = 0;
var drawCounter = 0;

var main = function (input) {
  var myOutputValue =
    "You can only input 'scissors', 'paper' or 'stone'. Please input valid option!";

  if (currentGameMode == "Waiting for user name..") {
    // set the name
    userName = input;
    // now that we have the name, switch the mode
    currentGameMode = "Scissors paper stone game is starting!";
    console.log(currentGameMode);

    myOutputValue =
      "Hello " +
      userName +
      "! Welcome to the scissors paper stone game. Please input 'scissors', 'paper' or 'stone' only to start playing!";
  } else if ((currentGameMode = "Scissors paper stone game is starting!")) {
    console.log(currentGameMode);
    var computer = generateScissorsPaperStone();
    console.log("Computer chooses", computer);

    if (
      (input == "scissors" && computer == "scissors") ||
      (input == "paper" && computer == "paper") ||
      (input == "stone" && computer == "stone")
    ) {
      drawCounter = drawCounter + 1;
      console.log(drawCounter);
      console.log("draw!");
      myOutputValue =
        "It's a draw! You have drawn " + drawCounter + " time(s)!";
    }

    if (
      (input == "scissors" && computer == "paper") ||
      (input == "paper" && computer == "stone") ||
      (input == "stone" && computer == "scissors")
    ) {
      userWinCounter = userWinCounter + 1;
      console.log(userWinCounter);
      console.log("Winning actions");
      myOutputValue = `${userName}, you chose ${input} and won! <br><br>
        The computer chose ${computer} and lost! <br><br>
        Bravo, keep it up ${userName}! You've won ${userWinCounter} turn(s) so far!`;
    }

    if (
      (input == "scissors" && computer == "stone") ||
      (input == "paper" && computer == "scissors") ||
      (input == "stone" && computer == "paper")
    ) {
      computerWinCounter = computerWinCounter + 1;
      console.log(computerWinCounter);
      console.log("Losing actions");
      myOutputValue =
        `${userName}, you chose ${input} and lost! <br><br>
        The computer chose ${computer} and won ` +
        computerWinCounter +
        ` turn(s)! <br><br>
        Good try ${userName}! You've won ${userWinCounter} turn(s) so far, keep going!`;
    }
  }
  return myOutputValue;
};