"use strict";

Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.getTetherAttachments = getTetherAttachments;
exports.getScrollbarWidth = getScrollbarWidth;
exports.setScrollbarWidth = setScrollbarWidth;
exports.isBodyOverflowing = isBodyOverflowing;
exports.getOriginalBodyPadding = getOriginalBodyPadding;
exports.conditionallyUpdateScrollbar = conditionallyUpdateScrollbar;
exports.mapToCssModules = mapToCssModules;
exports.tetherAttachements = void 0;

function getTetherAttachments(placement) {
  let attachments = {};

  switch (placement) {
    case 'top':
    case 'top center':
      attachments = {
        attachment: 'bottom center',
        targetAttachment: 'top center'
      };
      break;

    case 'bottom':
    case 'bottom center':
      attachments = {
        attachment: 'top center',
        targetAttachment: 'bottom center'
      };
      break;

    case 'left':
    case 'left center':
      attachments = {
        attachment: 'middle right',
        targetAttachment: 'middle left'
      };
      break;

    case 'right':
    case 'right center':
      attachments = {
        attachment: 'middle left',
        targetAttachment: 'middle right'
      };
      break;

    case 'top left':
      attachments = {
        attachment: 'bottom left',
        targetAttachment: 'top left'
      };
      break;

    case 'top right':
      attachments = {
        attachment: 'bottom right',
        targetAttachment: 'top right'
      };
      break;

    case 'bottom left':
      attachments = {
        attachment: 'top left',
        targetAttachment: 'bottom left'
      };
      break;

    case 'bottom right':
      attachments = {
        attachment: 'top right',
        targetAttachment: 'bottom right'
      };
      break;

    case 'right top':
      attachments = {
        attachment: 'top left',
        targetAttachment: 'top right'
      };
      break;

    case 'right bottom':
      attachments = {
        attachment: 'bottom left',
        targetAttachment: 'bottom right'
      };
      break;

    case 'left top':
      attachments = {
        attachment: 'top right',
        targetAttachment: 'top left'
      };
      break;

    case 'left bottom':
      attachments = {
        attachment: 'bottom right',
        targetAttachment: 'bottom left'
      };
      break;

    default:
      attachments = {
        attachment: 'top center',
        targetAttachment: 'bottom center'
      };
  }

  return attachments;
}

const tetherAttachements = ['top', 'bottom', 'left', 'right', 'top left', 'top center', 'top right', 'right top', 'right middle', 'right bottom', 'bottom right', 'bottom center', 'bottom left', 'left top', 'left middle', 'left bottom']; // https://github.com/twbs/bootstrap/blob/v4.0.0-alpha.4/js/src/modal.js#L436-L443

exports.tetherAttachements = tetherAttachements;

function getScrollbarWidth() {
  let scrollDiv = document.createElement('div'); // .modal-scrollbar-measure styles // https://github.com/twbs/bootstrap/blob/v4.0.0-alpha.4/scss/_modal.scss#L106-L113

  scrollDiv.style.position = 'absolute';
  scrollDiv.style.top = '-9999px';
  scrollDiv.style.width = '50px';
  scrollDiv.style.height = '50px';
  scrollDiv.style.overflow = 'scroll';
  document.body.appendChild(scrollDiv);
  const scrollbarWidth = scrollDiv.offsetWidth - scrollDiv.clientWidth;
  document.body.removeChild(scrollDiv);
  return scrollbarWidth;
}

function setScrollbarWidth(padding) {
  document.body.style.paddingRight = padding > 0 ? `${padding}px` : null;
}

function isBodyOverflowing() {
  return document.body.clientWidth < window.innerWidth;
}

function getOriginalBodyPadding() {
  return parseInt(window.getComputedStyle(document.body, null).getPropertyValue('padding-right') || 0, 10);
}

function conditionallyUpdateScrollbar() {
  const scrollbarWidth = getScrollbarWidth(); // https://github.com/twbs/bootstrap/blob/v4.0.0-alpha.4/js/src/modal.js#L420

  const fixedContent = document.querySelectorAll('.navbar-fixed-top, .navbar-fixed-bottom, .is-fixed')[0];
  const bodyPadding = fixedContent ? parseInt(fixedContent.style.paddingRight || 0, 10) : 0;

  if (isBodyOverflowing()) {
    setScrollbarWidth(bodyPadding + scrollbarWidth);
  }
}

function mapToCssModules(className, cssModule) {
  if (!cssModule) {
    return className;
  }

  return className.split(' ').map(c => cssModule[c] || c).join(' ');
}