import '@material/mwc-icon-button-toggle';

import type {Cash} from 'cash-dom';
import type {
  Children,
  Vnode,
  VnodeDOM
} from 'mithril';

import Component from '../Component';
import Mdi from '../Mdi';

declare global {
  namespace JSX {
    interface IntrinsicElements {
      TableColumn: TableColumn;
    }
  }
}

type Attributes = {
  type?: 'numeric' | 'checkbox',
  id?: string,
  sortable?: boolean,
  filterable?: boolean,
};

export default class TableColumn extends Component<Attributes> {
  view(vnode: Vnode) {
    this.attrs.addClassNames('mdc-data-table__header-cell', {
      [`mdc-data-table__header-cell--${this.attrs.get(
        'type'
      ) as string}`]: this.attrs.has('type')
    });

    let {children}: {children?: Children} = vnode;

    if (this.attrs.has('sortable')) {
      this.attrs.addClassNames('mdc-data-table__header-cell--with-sort');
      this.attrs
        .put('aria-sort', 'none')
        .put('data-column-id', this.attrs.get('id'));
      children = (
        <div className="mdc-data-table__header-cell-wrapper">
          <mwc-icon-button-toggle style="--mdc-icon-button-size: 28px; display: none;">
            <Mdi icon="arrow-down-thin" slot="onIcon" />
            <Mdi icon="arrow-up-thin" slot="offIcon" />
          </mwc-icon-button-toggle>
          &nbsp;
          <div className="mdc-data-table__header-cell-label">
            {children}
          </div>
        </div>
      );
    }

    if ((
      (!children || (Array.isArray(children) && children.length === 0))
        && this.attrs.get('type') === 'checkbox'
    )) {
      children = <mwc-checkbox className="mdc-data-table__header-row-checkbox" />;
    }

    if (this.attrs.get('type') !== 'checkbox' && this.attrs.has('filterable')) {
      children = (
        <>
          {children}
          <div style="margin-top: 8px;">
            <text-field
              outlined
              className="mdc-data-table__filter-textfield"
              label={__('Filtro') as string}
              compact
            />
          </div>
        </>
      );
    }

    return (
      <th {...this.attrs.all()} role="columnheader" scope="col">
        {children}
      </th>
    );
  }

  oncreate(vnode: VnodeDOM<Attributes>) {
    super.oncreate(vnode);

    if (this.attrs.get('type') === 'checkbox') {
      const checkbox = $(this.element).children(
        '.mdc-data-table__header-row-checkbox'
      );
      checkbox.on('change', this.onCheckboxClicked.bind(this));
    }

    // Handle click on a column (add arrows)
    const observer = new MutationObserver(this.onClassChanged.bind(this));
    observer.observe(this.element, {
      attributes: true,
      attributeFilter: ['class']
    });
    $(this.element)
      .find('.mdc-data-table__filter-textfield')
      .on('input', this.onFilterInput.bind(this));
  }

  onCheckboxClicked(event: Event) {
    const row: Cash = $(this.element)
      .closest('table')
      .find('tbody tr[checkable]');
    const selectedClass = 'mdc-data-table__row--selected';
    const checkbox = event.target as HTMLInputElement;

    row.toggleClass(selectedClass, checkbox.checked);

    row.find('mwc-checkbox').prop('checked', checkbox.checked);
  }

  onClassChanged(mutations: MutationRecord[]) {
    for (const mutation of mutations) {
      const {classList} = mutation.target as HTMLElement;
      const ascendingClass = 'mdc-data-table__header-cell--sorted';
      const descendingClass = 'mdc-data-table__header-cell--sorted-descending';
      const onValue = classList.contains(descendingClass);
      const button: Cash = $(this.element).find('mwc-icon-button-toggle');
      button.prop('on', onValue);

      if (
        classList.contains(ascendingClass)
        || classList.contains(descendingClass)
      ) {
        $(this.element).css('cursor', 'auto');
        button.show();
      } else if (
        !classList.contains(ascendingClass)
        && !classList.contains(descendingClass)
      ) {
        $(this.element).css('cursor', 'pointer');
        button.hide();
      }
    }
  }

  onFilterInput(event: InputEvent) {
    const index = $(this.element).index();
    const rows: Cash = $(this.element).closest('table').find('tbody tr');
    const {value} = event.target as HTMLInputElement;

    rows.hide();
    rows
      .filter(
        (index_, element) => $(element)
          .find(`td:nth-child(${index + 1})`)
          .text()
          .search(value) !== -1
      )
      .show();
  }
}