/* global $create messageBoxProxy */// dom.js
/* global API */// msg.js
/* global DraggableList */
/* global t */// localization.js
'use strict';

/* exported InjectionOrder */
async function InjectionOrder(show = true) {
  if (!show) {
    return messageBoxProxy.close();
  }
  const SEL_ENTRY = '.injection-order-entry';
  const groups = await API.styles.getAllOrdered(['_id', 'id', 'name', 'enabled']);
  const ols = {};
  const parts = {};
  const entry = $create('li' + SEL_ENTRY, [
    parts.name = $create('a', {
      target: '_blank',
      draggable: false,
    }),
    $create('a.injection-order-toggle', {
      tabIndex: 0,
      draggable: false,
      title: t('styleInjectionImportance'),
    }),
  ]);
  await messageBoxProxy.show({
    title: t('styleInjectionOrder'),
    contents: $create('fragment', Object.entries(groups).map(makeList)),
    className: 'injection-order center-dialog',
    blockScroll: true,
    buttons: [t('confirmClose')],
  });

  function makeEntry(style) {
    entry.classList.toggle('enabled', style.enabled);
    parts.name.href = '/edit.html?id=' + style.id;
    parts.name.textContent = style.name;
    return Object.assign(entry.cloneNode(true), {
      styleNameLowerCase: style.name.toLocaleLowerCase(),
    });
  }

  function makeList([type, styles]) {
    const ids = groups[type] = styles.map(s => s._id);
    const ol = ols[type] = $create('ol.scroller');
    let maxTranslateY;
    ol.append(...styles.map(makeEntry));
    ol.on('d:dragstart', ({detail: d}) => {
      d.origin.dataTransfer.setDragImage(new Image(), 0, 0);
      maxTranslateY =
        ol.scrollHeight + ol.offsetTop - d.dragTarget.offsetHeight - d.dragTarget.offsetTop;
    });
    ol.on('d:dragmove', ({detail: d}) => {
      d.origin.stopPropagation(); // preserves dropEffect
      d.origin.dataTransfer.dropEffect = 'move';
      const y = Math.min(d.currentPos.y - d.startPos.y, maxTranslateY);
      d.dragTarget.style.transform = `translateY(${y}px)`;
    });
    ol.on('d:dragend', ({detail: d}) => {
      const [item] = ids.splice(d.originalIndex, 1);
      ids.splice(d.spliceIndex, 0, item);
      ol.insertBefore(d.dragTarget, d.insertBefore);
      API.styles.setOrder(groups);
    });
    ol.on('click', e => {
      if (e.target.closest('.injection-order-toggle')) {
        const el = e.target.closest(SEL_ENTRY);
        const i = [].indexOf.call(el.parentNode.children, el);
        const [item] = ids.splice(i, 1);
        const type2 = type === 'main' ? 'prio' : 'main';
        groups[type2].push(item);
        ols[type2].appendChild(el);
        API.styles.setOrder(groups);
      }
    });
    DraggableList(ol, {scrollContainer: ol});
    return $create('section', {dataset: {[type]: ''}}, [
      $create('header', t(`styleInjectionOrderHint${type === 'main' ? '' : '_' + type}`)),
      ol,
    ]);
  }
}