Rock Paper Scissors - Source Code

const choices = ['rock', 'paper', 'scissors'];
const playerScoreElement = document.getElementById('playerScore');
const computerScoreElement = document.getElementById('computerScore');
const resultElement = document.getElementById('result');

let playerScore = 0;
let computerScore = 0;
let playerHistory = [];

function getSmartComputerChoice() {
  if (playerHistory.length < 3) {
    return choices[Math.floor(Math.random() * choices.length)];
  }
  
  const recent = playerHistory.slice(-3);
  const patterns = {
    rock: 0, paper: 0, scissors: 0
  };
  
  recent.forEach(choice => patterns[choice]++);
  
  const mostFrequent = Object.keys(patterns).reduce((a, b) => 
    patterns[a] > patterns[b] ? a : b
  );
  
  const counters = {
    rock: 'paper',
    paper: 'scissors', 
    scissors: 'rock'
  };
  
  return Math.random() < 0.7 ? counters[mostFrequent] : 
    choices[Math.floor(Math.random() * choices.length)];
}

function determineWinner(playerChoice, computerChoice) {
  if (playerChoice === computerChoice) return 'tie';
  
  const winConditions = {
    rock: 'scissors',
    paper: 'rock',
    scissors: 'paper'
  };
  
  return winConditions[playerChoice] === computerChoice ? 'player' : 'computer';
}

function playGame(playerChoice) {
  playerHistory.push(playerChoice);
  if (playerHistory.length > 10) playerHistory.shift();
  
  const computerChoice = getSmartComputerChoice();
  const winner = determineWinner(playerChoice, computerChoice);
  
  document.getElementById('playerChoice').textContent = playerChoice;
  document.getElementById('computerChoice').textContent = computerChoice;
  
  if (winner === 'player') {
    playerScore++;
    resultElement.textContent = 'You Win!';
  } else if (winner === 'computer') {
    computerScore++;
    resultElement.textContent = 'Computer Wins!';
  } else {
    resultElement.textContent = "It's a Tie!";
  }
  
  playerScoreElement.textContent = playerScore;
  computerScoreElement.textContent = computerScore;
}

function resetGame() {
  playerScore = 0;
  computerScore = 0;
  playerHistory = [];
  playerScoreElement.textContent = playerScore;
  computerScoreElement.textContent = computerScore;
  resultElement.textContent = 'Make your choice!';
}