class Tooltip {

  constructor(quill, boundsContainer) {

    this.quill = quill;

    this.boundsContainer = boundsContainer || document.body;

    this.root = quill.addContainer('ql-tooltip');

    this.root.innerHTML = this.constructor.TEMPLATE;

    let offset = parseInt(window.getComputedStyle(this.root).marginTop);

    this.quill.root.addEventListener('scroll', () => {

      this.root.style.marginTop = (-1*this.quill.root.scrollTop) + offset + 'px';

      this.checkBounds();

    });

    this.hide();

  }



  checkBounds() {

    this.root.classList.toggle('ql-out-top', this.root.offsetTop <= 0);

    this.root.classList.remove('ql-out-bottom');

    this.root.classList.toggle('ql-out-bottom', this.root.offsetTop + this.root.offsetHeight >= this.quill.root.offsetHeight);

  }



  hide() {

    this.root.classList.add('ql-hidden');

  }



  position(reference) {

    let left = reference.left + reference.width/2 - this.root.offsetWidth/2;

    let top = reference.bottom + this.quill.root.scrollTop;

    this.root.style.left = left + 'px';

    this.root.style.top = top + 'px';

    let containerBounds = this.boundsContainer.getBoundingClientRect();

    let rootBounds = this.root.getBoundingClientRect();

    let shift = 0;

    if (rootBounds.right > containerBounds.right) {

      shift = containerBounds.right - rootBounds.right;

      this.root.style.left = (left + shift) + 'px';

    }

    if (rootBounds.left < containerBounds.left) {

      shift = containerBounds.left - rootBounds.left;

      this.root.style.left = (left + shift) + 'px';

    }

    this.checkBounds();

    return shift;

  }



  show() {

    this.root.classList.remove('ql-editing');

    this.root.classList.remove('ql-hidden');

  }

}





export default Tooltip;

