gistfile1.txt

let currentQuestion = 0
let score = 0
const numOfQuestions = questions.length
const numOfChoices = 3
const questionCountElement = document.getElementById('question-count')
const questionContainerElement = document.getElementById('question-container')
const choicesContainerElement = document.getElementById('choices-container')

function displayQuestion () {
  const question = questions[currentQuestion]
  console.log('question', question)
  const questionElement = document.getElementById('question')
  questionElement.innerText = question.question

  const countMessage = `${currentQuestion + 1}/${numOfQuestions}`
  questionCountElement.innerText = countMessage

  const choices = document.getElementsByClassName('choice')
  console.log('choices', choices)
  // choices[0].innerText = question.choices[0]
  // choices[1].innerText = question.choices[1]
  // choices[2].innerText = question.choices[2]
  const choicesArray = [...choices]
  choicesArray.forEach((choice, index) => {
    choice.innerText = question.choices[index]
  })  
}

function checkAnswer (questionIndex) {
  const question = questions[currentQuestion]
  const correct = questionIndex === question.correctAnswer
  if (correct) {
    score += 1 // score++
    updateScore()
  }
  const more = currentQuestion < questions.length - 1
  if (more) {
    currentQuestion += 1
    displayQuestion()
  } else {
    endQuiz()
  }
}

function updateScore () {
  const scoreElement = document.getElementById('score')
  const last = currentQuestion === questions.length - 1
  if (last) {
    const scoreMessage = `Final Score: ${score}/${questions.length}`
    scoreElement.innerText = scoreMessage
  } else {
    const scoreMessage = `Current Score: ${score}`
    scoreElement.innerText = scoreMessage
  }
}

function endQuiz () {
  questionCountElement.innerHTML = 'The quiz has been completed'
  questionContainerElement.innerHTML = ''
  choicesContainerElement.innerHTML = ''
}

function restartQuiz () {
  currentQuestion = 0
  score = 0
  updateScore()
  questionContainerElement.innerHTML = '<p id="question"></p>'
  choicesContainerElement.innerHTML = `
    <button class="choice" onclick="checkAnswer(0)"></button>
    <button class="choice" onclick="checkAnswer(1)"></button>
    <button class="choice" onclick="checkAnswer(2)"></button>
  `
  displayQuestion()
}

displayQuestion()