import { extend, mergeData } from '../../vue';
import { NAME_DROPDOWN_GROUP } from '../../constants/components';
import { PROP_TYPE_STRING, PROP_TYPE_ARRAY_OBJECT_STRING } from '../../constants/props';
import { SLOT_NAME_HEADER, SLOT_NAME_DEFAULT } from '../../constants/slots';
import { isTag } from '../../utils/dom';
import { identity } from '../../utils/identity';
import { hasNormalizedSlot, normalizeSlot } from '../../utils/normalize-slot';
import { omit } from '../../utils/object';
import { makePropsConfigurable, makeProp } from '../../utils/props';

// --- Props ---

const props = makePropsConfigurable({
  ariaDescribedby: makeProp(PROP_TYPE_STRING),
  header: makeProp(PROP_TYPE_STRING),
  headerClasses: makeProp(PROP_TYPE_ARRAY_OBJECT_STRING),
  headerTag: makeProp(PROP_TYPE_STRING, 'header'),
  headerVariant: makeProp(PROP_TYPE_STRING),
  id: makeProp(PROP_TYPE_STRING)
}, NAME_DROPDOWN_GROUP);

// --- Main component ---

// @vue/component
const BDropdownGroup = /*#__PURE__*/extend({
  name: NAME_DROPDOWN_GROUP,
  functional: true,
  props,
  render(h, _ref) {
    let {
      props,
      data,
      slots,
      scopedSlots
    } = _ref;
    const {
      id,
      variant,
      header,
      headerTag
    } = props;
    const $slots = slots();
    const $scopedSlots = scopedSlots || {};
    const slotScope = {};
    const headerId = id ? `_bv_${id}_group_dd_header` : null;
    let $header = h();
    if (hasNormalizedSlot(SLOT_NAME_HEADER, $scopedSlots, $slots) || header) {
      $header = h(headerTag, {
        staticClass: 'dropdown-header',
        class: [props.headerClasses, {
          [`text-${variant}`]: variant
        }],
        attrs: {
          id: headerId,
          role: isTag(headerTag, 'header') ? null : 'heading'
        }
      }, normalizeSlot(SLOT_NAME_HEADER, slotScope, $scopedSlots, $slots) || header);
    }
    return h('li', mergeData(omit(data, ['attrs']), {
      attrs: {
        role: 'presentation'
      }
    }), [$header, h('ul', {
      staticClass: 'list-unstyled',
      attrs: {
        ...(data.attrs || {}),
        id,
        role: 'group',
        'aria-describedby': [headerId, props.ariaDescribedBy].filter(identity).join(' ').trim() || null
      }
    }, normalizeSlot(SLOT_NAME_DEFAULT, slotScope, $scopedSlots, $slots))]);
  }
});

export { BDropdownGroup, props };
