const getUserChoice = userInput => {
userInput = userInput.toLowerCase();
if (userInput === 'rock' || userInput === 'paper' || userInput === 'scissors'){
  return userInput;
} else {
  console.log('Error!');
}

};

function getComputerChoice() {
  const randomNumber = Math.floor(Math.random() * 3);
  switch (randomNumber) {
  case 0:
    return 'rock';
  case 1:
    return 'paper';
  case 2:
    return 'scissors';
}
};

const determineWinner = (userChoice, computerChoice) => {
  if (userChoice === computerChoice) {
    return 'The game was a tie!'
  }
  if (userChoice === 'rock'){
    if (computerChoice === 'paper'){
      return 'The computer won!'
    } else {
        return 'The player won!'
      }

  }
  if (userChoice === 'paper'){
    if (computerChoice === 'scissors'){
      return 'The computer won!'
    } else {
        return 'The player won!'
    }
  }
  if (userChoice === 'scissors'){
    if (computerChoice === 'rock'){
      return 'The computer won!'
    } else {
        return 'The player won!'
    }
  }
}

console.log(determineWinner('paper', 'scissors'));
console.log(determineWinner('paper', 'paper'));
console.log(determineWinner('paper', 'rock'));