let search = document.querySelector('.search');
let searchInp = search.children[0];
let searchLbl = search.children[1];
let searchBtn = search.children[2];
let searchBrd = search.children[3];
let searchCls = search.children[4];
let searchTxt, clonedTxt, clonedLbl, clonedLblWrap, animating = false, busy = true;
let TLTxt = new TimelineLite();
let TLSrch = new TimelineLite({onReverseComplete: () => {
  TLTxt.clear();
  animating = false;
}});

createTxt('Enter a search query', searchLbl, 'search-text');
searchTxt = document.querySelectorAll('.search-text');

searchBtn.addEventListener('click', () => {
  if (!animating) animSearch();
});

searchBrd.addEventListener('click', () => {
  if (!animating) animSearch();
});

searchInp.addEventListener('focus', () => {
  if (busy || searchInp.value.trim().length) return;
  TLTxt.isActive() ? TLTxt.play() : TLTxt.restart().timeScale(1).staggerTo(searchTxt, .07, {opacity: 0}, .035); 
});

searchInp.addEventListener('blur', () => {
  if (busy || searchInp.value.trim().length) return;
  TLTxt.reverse().timeScale(1.3);
});

search.addEventListener('submit', e => {
  e.preventDefault();
  busy = true;
  TLTxt.paused() ? TLTxt.clear() : TLTxt.play();
  let val = searchInp.value.trim();
  searchInp.disabled = true;
  if (val.length) {
    cloneLbl();
    createLblTxt(val);
  }
  else TLSrch.reverse();
  searchInp.value = '';
  searchInp.blur();
});

searchCls.addEventListener('mousedown', e => {
  e.preventDefault();
});

searchCls.addEventListener('click', () => {
  if (busy) return;
  busy = true;
  let val = searchInp.value.trim();
  searchInp.disabled = true;
  if (val.length) {
    cloneLbl();
    createLblTxt(val);
  }
  else {
    TLTxt.isActive() ? TLTxt.play() : TLTxt.progress() == 1 ? TLTxt.clear() :
      TLTxt.restart().timeScale(1).staggerTo(searchTxt, .07, {opacity: 0}, .035);
    TLSrch.reverse();
  }
  searchInp.value = '';
  searchInp.blur();
});

function createTxt(text, elLbl, textClass) {
  let splitText = [];
  for (let i = text.length; i--;) {
    splitText.unshift(`<span class='${textClass}'>${text[i]}</span>`);
  }
  elLbl.innerHTML = splitText.join('');
};

function createLblTxt(val) {
  createTxt(val, clonedLbl, 'cloned-text');
  clonedTxt = document.querySelectorAll('.cloned-text');
  animClonedTxt(Array.from(clonedTxt).reverse());
}

function animSearch() {
  animating = true;
  TLSrch.restart()
  .to(searchBrd, .4, {scaleX: 2, x: -25, y: -25, ease: Sine.easeIn})
  .to(searchBtn, .4, {rotationX: 90, ease: Sine.easeIn}, '-=.4')
  .to(searchBrd, .4, {rotation: 180, x: '-=6', y: '+=10', ease: Power2.easeInOut})
  .set(searchBrd, {transformOrigin: '0', marginRight: '-38px'}) 
  .to(searchBrd, .6, {scaleX: 13, ease: Power1.easeOut})
  .set(search, {className: '+=edge', onComplete: showTxt})
  .to(searchInp, .6, {scaleX: 1, ease: Sine.easeInOut}, '-=.3')
  .set(searchCls, {className: '+=visible'})
  .addPause();
}

function showTxt() {
  let tl = new TimelineLite({onStart: () => {searchInp.disabled = true}});
  tl.staggerTo(searchTxt, .07, {opacity: 1}, .035);
  setTimeout(() => {
    searchInp.disabled = false;
    busy = false;
  }, 300)
}

function animClonedTxt(el) {
  let scrollW = clonedLbl.scrollWidth;
  let offsetW = scrollW - clonedLbl.offsetWidth;
  let tl = new TimelineLite({onComplete: () => {clonedLblWrap.remove()}});
  tl.staggerTo(el, .08, {opacity: 0}, .04);
  let tlDur = tl.totalDuration();
  let offsetTime = (offsetW * tlDur) / scrollW;
  if (offsetW > 0) {
    TweenLite.fromTo(clonedLbl, offsetTime, {x: -offsetW}, {x: 0, delay: .2, ease: SlowMo.ease.config(0.1, 0.1, false)});
  };
  setTimeout(() => {
    TLSrch.reverse();
  }, Math.max((tlDur - .35) * 1000, 0));
}

function cloneLbl() {
  clonedLblWrap = document.createElement('div');
  clonedLblWrap.className = 'search-label';
  search.appendChild(clonedLblWrap);
  clonedLbl = document.createElement('div');
  clonedLblWrap.appendChild(clonedLbl);
};