@import url("https://fonts.googleapis.com/css?family=Nunito&display=swap");

html {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  overflow-y: hidden;
  display: flex;
  align-items: center;
  font-family: Nunito, sans-serif;
  background-color: #c1690a;
}

/* Video Background */
.video-background {
  position: fixed;
  right: 0;
  bottom: 0;
  width: 100vw;
  height: auto;
}

video {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.video-overlay {
  position: fixed;
  left: 0;
  top: 0;
  height: 100vh;
  width: 100vw;
  background: rgba(255, 255, 255, 0.35);
}

/* Container */
.container {
  min-width: 580px;
  min-height: 304px;
  color: black;
  margin: 0 auto;
  padding: 25px 50px;
  border-radius: 5px;
  z-index: 2;
  background: rgba(255, 255, 255, 0.85);
  display: flex;
  justify-content: center;
}

.input-container {
  position: relative;
  top: 20px;
}

h1 {
  font-size: 35px;
  text-align: center;
  margin-top: 0;
  margin-bottom: 10px;
}

/* Form */
.form {
  width: 480px;
}

label {
  font-weight: bold;
  margin-left: 10px;
}

input {
  width: 95%;
  margin-bottom: 10px;
  padding: 10px;
  border: 1px solid #ccc;
  border-radius: 20px;
  background: #fff;
  outline: none;
  font-family: Nunito, sans-serif;
}

/* Button */
button {
  width: 100%;
  height: 40px;
  border-radius: 20px;
  margin-top: 15px;
  border: none;
  text-transform: uppercase;
  background: #006959;
  color: white;
  cursor: pointer;
  outline: none;
}

button:hover {
  filter: brightness(110%);
}

/* Countdown */
ul {
  margin-left: -45px;
}

li {
  display: inline-block;
  font-size: 30px;
  list-style-type: none;
  padding: 10px;
  text-transform: uppercase;
}

li span {
  display: block;
  font-size: 80px;
  text-align: center;
}

/* Complete */
.complete {
  position: relative;
  top: 60px;
}

.complete-title {
  animation: complete 4s infinite;
}

@keyframes complete {
  0% {
    color: rgb(233, 12, 12);
  }

  25% {
    color: rgb(214, 193, 0);
  }

  50% {
    color: rgb(68, 231, 19);
    transform: scale(1.5);
  }

  75% {
    color: rgb(19, 79, 209);
  }

  100% {
    color: rgb(188, 16, 211);
  }
}

/* Media Query: Large Smartphone (Vertical) */
@media screen and (max-width: 600px) {
  video {
    object-fit: cover;
    object-position: 70%;
    margin-top: -1px;
  }

  .video-background {
    height: 100vh;
    width: 100vw;
  }

  .container {
    min-width: unset;
    width: 95vw;
    min-height: 245px;
    padding: 20px;
    margin: 10px;
  }

  .input-container {
    top: unset;
  }

  .countdown {
    position: relative;
    top: 10px;
  }

  .form {
    width: unset;
  }

  input {
    width: 93%;
  }

  h1 {
    font-size: 20px;
  }

  li {
    font-size: 15px;
  }

  li span {
    font-size: 40px;
  }
}

//값들.

  //기본창.
//전체 입력창.
const inputContainer = document.getElementById('input-container');
//전체 폼.
const countdownForm = document.getElementById('countdownForm');
//날짜 입력창.
const dateEl = document.getElementById('date-picker');

//카운트다운창.
//전체 카운트다운.
const countdownEl = document.getElementById('countdown');
//제목
const countdownElTitle = document.getElementById('countdown-title');
//리셋 버튼
const countdownBtn = document.getElementById('countdown-button');
//시간을 표기하는 숫자들.
const timeElements = document.querySelectorAll('span');

//완료창
//전체 완료창.
const completeEl = document.getElementById('complete');
//완료정보
const completeElInfo = document.getElementById('complete-info');
//완료 버튼.
const completeBtn = document.getElementById('complete-button');

let countdownTitle = '';
let countdownDate = '';
let countdownValue = Date;
let countdownActive;
let savedCountdown;

//시간.
const second = 1000;
const minute = second * 60;
const hour = minute * 60;
const day = hour * 24;




//오늘의 날짜를 date의 최솟값으로 설정해 카운트다운의 기준점을 만든다.
const today = new Date().toISOString().split('T')[0];
dateEl.setAttribute('min', today);


// 문서에 카운트다운 값 채우기. / UI 완성.
function updateDOM() {
  countdownActive = setInterval(() => {
    //현재시간의 총량을 가져옴.
    const now = new Date().getTime();
    //선택시간- 현재시간량은 걸리는 기간.
    const distance = countdownValue - now;
    //시간 계산.
    const days = Math.floor(distance / day);
    const hours = Math.floor((distance % day) / hour);
    const minutes = Math.floor((distance % hour) / minute);
    const seconds = Math.floor((distance % minute) / second);
    // 입력 숨기기.
    inputContainer.hidden = true;
    // 카운트다운이 끝나면 최종 실행.
    if (distance < 0) {
      countdownEl.hidden = true;
      clearInterval(countdownActive);
      completeElInfo.textContent = `${countdownTitle} finished on ${countdownDate}`;
      completeEl.hidden = false;
    } else {
      // 카운트다운이 진행되는 동안에는 시간이 줄어드는 게 보여야 한다.
      countdownElTitle.textContent = `${countdownTitle}`;
      timeElements[0].textContent = `${days}`;
      timeElements[1].textContent = `${hours}`;
      timeElements[2].textContent = `${minutes}`;
      timeElements[3].textContent = `${seconds}`;
      completeEl.hidden = true;
      countdownEl.hidden = false;
    }
  }, second);
  //setinterval의 간격이 초단위로 가면서 초시계 완성!
}

function updateCountdown(e) {
  e.preventDefault();
  //제목,날짜를 변경, 값을 로컬 저장소에 저장.
  countdownTitle = e.srcElement[0].value;
  countdownDate = e.srcElement[1].value;
  savedCountdown = {
    title: countdownTitle,
    date: countdownDate,
  };
  localStorage.setItem('countdown', JSON.stringify(savedCountdown));
  // Check if no date entered
  if (countdownDate === '') {
    alert('날짜를 선택해주세요');
  } else {
    //선택한 날짜가 가지는 전체 시간.
    countdownValue = new Date(countdownDate).getTime();
    updateDOM();
  }
}

function reset() {
  // 카운트다운은 숨기고 입력창은 보이게.
  countdownEl.hidden = true;
  completeEl.hidden = true;
  inputContainer.hidden = false;
  // 카운트다운 멈춰!
  clearInterval(countdownActive);
  //값을 리셋, 로컬 저장소값도 삭제.
  countdownTitle = '';
  countdownDate = '';
  localStorage.removeItem('countdown');
}

function restorePreviousCountdown() {
  // 유효값이 있을 경우 저장소에서 날짜를 가져온다.
  if (localStorage.getItem('countdown')) {
    //값이 있으면 카운트다운 실행.
    inputContainer.hidden = true; 
    savedCountdown = JSON.parse(localStorage.getItem('countdown'));
    //parse를 통해 문자값을 변환.
    countdownTitle = savedCountdown.title;
    countdownDate = savedCountdown.date;
    countdownValue = new Date(countdownDate).getTime();
    updateDOM();
    //저장값으로 카운트다운 실행.
  }
}

// Event Listener
//카운트다운에서 입력받으면 다음 창으로 넘어감.
countdownForm.addEventListener('submit', updateCountdown);
countdownBtn.addEventListener('click', reset);
completeBtn.addEventListener('click', reset);

// On Load, check localStorage
restorePreviousCountdown();