import { Assertions, Chain, GeneralSteps, Logger, Pipeline } from '@ephox/agar';
import { Hierarchy, Element, SelectorFind } from '@ephox/sugar';
import { getClosestCellAbove, getClosestCellBelow, findClosestPositionInAboveCell, findClosestPositionInBelowCell } from 'tinymce/core/caret/TableCells';
import ViewBlock from '../../module/test/ViewBlock';
import { UnitTest } from '@ephox/bedrock';
import { CaretPosition } from 'tinymce/core/caret/CaretPosition';

UnitTest.asynctest('browser.tinymce.core.caret.TableCellsTest', function () {
  const success = arguments[arguments.length - 2];
  const failure = arguments[arguments.length - 1];
  const viewBlock = ViewBlock();

  const cSetHtml = function (html) {
    return Chain.op(function () {
      viewBlock.update(html.trim());
    });
  };

  const cAssertCell = (path) => {
    return Chain.op(function (cellOption) {
      const cell = cellOption.getOrDie('x');
      const expectedContainer = Hierarchy.follow(Element.fromDom(viewBlock.get()), path).getOrDie();
      Assertions.assertDomEq('Should be the expected element', expectedContainer, Element.fromDom(cell));
    });
  };

  const cAssertNone = Chain.op(function (pos) {
    Assertions.assertEq('Should be the none but got some', true, pos.isNone());
  });

  const cGetClosestCellAbove = (x: number, y: number) => {
    return Chain.mapper(function (viewBlock) {
      const table = SelectorFind.descendant(Element.fromDom(viewBlock.get()), 'table').getOrDie('Could not find table').dom();
      const rect = table.getBoundingClientRect();
      return getClosestCellAbove(table, rect.left + x, rect.top + y);
    });
  };

  const cGetClosestCellBelow = (x: number, y: number) => {
    return Chain.mapper(function (viewBlock) {
      const table = SelectorFind.descendant(Element.fromDom(viewBlock.get()), 'table').getOrDie('Could not find table').dom();
      const rect = table.getBoundingClientRect();
      return getClosestCellBelow(table, rect.left + x, rect.top + y);
    });
  };

  const cFindClosestPositionInAboveCell = (path: number[], offset: number) => {
    return Chain.mapper(function (viewBlock) {
      const table = SelectorFind.descendant(Element.fromDom(viewBlock.get()), 'table').getOrDie('Could not find table').dom();
      const container = Hierarchy.follow(Element.fromDom(viewBlock.get()), path).getOrDie();
      const pos = CaretPosition(container.dom(), offset);
      return findClosestPositionInAboveCell(table, pos);
    });
  };

  const cFindClosestPositionInBelowCell = (path: number[], offset: number) => {
    return Chain.mapper(function (viewBlock) {
      const table = SelectorFind.descendant(Element.fromDom(viewBlock.get()), 'table').getOrDie('Could not find table').dom();
      const container = Hierarchy.follow(Element.fromDom(viewBlock.get()), path).getOrDie();
      const pos = CaretPosition(container.dom(), offset);
      return findClosestPositionInBelowCell(table, pos);
    });
  };

  const cAssertCaretPosition = (path: number[], offset: number) => {
    return Chain.op(function (posOption) {
      const container = Hierarchy.follow(Element.fromDom(viewBlock.get()), path).getOrDie();
      const pos = posOption.getOrDie('Needs to return a caret');

      Assertions.assertDomEq('Should be the expected container', container, Element.fromDom(pos.container()));
      Assertions.assertEq('Should be the expected offset', offset, pos.offset());
    });
  };

  viewBlock.attach();
  Pipeline.async({}, [
    Logger.t('getClosestCellAbove', GeneralSteps.sequence([
      Logger.t('Should return the top/right cell', Chain.asStep(viewBlock, [
        cSetHtml([
          '<table style="border-collapse: collapse" border="1">',
            '<tbody>',
              '<tr>',
                '<td style="width: 20px; height: 20px;">a</td>',
                '<td style="width: 20px; height: 20px;">b</td>',
              '</tr>',
              '<tr>',
                '<td style="width: 20px; height: 20px;">c</td>',
                '<td style="width: 20px; height: 20px;">d</td>',
              '</tr>',
            '</tbody>',
          '</table>',
        ].join('')),
        cGetClosestCellAbove(30, 30),
        cAssertCell([0, 0, 0, 1])
      ])),
      Logger.t('Should return the top/left cell', Chain.asStep(viewBlock, [
        cSetHtml([
          '<table style="border-collapse: collapse" border="1">',
            '<tbody>',
              '<tr>',
                '<td style="width: 20px; height: 20px;">a</td>',
                '<td style="width: 20px; height: 20px;">b</td>',
              '</tr>',
              '<tr>',
                '<td style="width: 20px; height: 20px;">c</td>',
                '<td style="width: 20px; height: 20px;">d</td>',
              '</tr>',
            '</tbody>',
          '</table>',
        ].join('')),
        cGetClosestCellAbove(15, 30),
        cAssertCell([0, 0, 0, 0])
      ])),
      Logger.t('Should not return a cell', Chain.asStep(viewBlock, [
        cSetHtml([
          '<table style="border-collapse: collapse" border="1">',
            '<tbody>',
              '<tr>',
                '<td style="width: 20px; height: 20px;">a</td>',
                '<td style="width: 20px; height: 20px;">b</td>',
              '</tr>',
              '<tr>',
                '<td style="width: 20px; height: 20px;">c</td>',
                '<td style="width: 20px; height: 20px;">d</td>',
              '</tr>',
            '</tbody>',
          '</table>',
        ].join('')),
        cGetClosestCellAbove(15, 15),
        cAssertNone
      ]))
    ])),

    Logger.t('getClosestCellBelow', GeneralSteps.sequence([
      Logger.t('Should return the bottom/right cell', Chain.asStep(viewBlock, [
        cSetHtml([
          '<table style="border-collapse: collapse" border="1">',
            '<tbody>',
              '<tr>',
                '<td style="width: 20px; height: 20px;">a</td>',
                '<td style="width: 20px; height: 20px;">b</td>',
              '</tr>',
              '<tr>',
                '<td style="width: 20px; height: 20px;">c</td>',
                '<td style="width: 20px; height: 20px;">d</td>',
              '</tr>',
            '</tbody>',
          '</table>',
        ].join('')),
        cGetClosestCellBelow(30, 15),
        cAssertCell([0, 0, 1, 1])
      ])),
      Logger.t('Should return the bottom/left cell', Chain.asStep(viewBlock, [
        cSetHtml([
          '<table style="border-collapse: collapse" border="1">',
            '<tbody>',
              '<tr>',
                '<td style="width: 20px; height: 20px;">a</td>',
                '<td style="width: 20px; height: 20px;">b</td>',
              '</tr>',
              '<tr>',
                '<td style="width: 20px; height: 20px;">c</td>',
                '<td style="width: 20px; height: 20px;">d</td>',
              '</tr>',
            '</tbody>',
          '</table>',
        ].join('')),
        cGetClosestCellBelow(15, 15),
        cAssertCell([0, 0, 1, 0])
      ])),
      Logger.t('Should not return a cell', Chain.asStep(viewBlock, [
        cSetHtml([
          '<table style="border-collapse: collapse" border="1">',
            '<tbody>',
              '<tr>',
                '<td style="width: 20px; height: 20px;">a</td>',
                '<td style="width: 20px; height: 20px;">b</td>',
              '</tr>',
              '<tr>',
                '<td style="width: 20px; height: 20px;">c</td>',
                '<td style="width: 20px; height: 20px;">d</td>',
              '</tr>',
            '</tbody>',
          '</table>',
        ].join('')),
        cGetClosestCellBelow(30, 30),
        cAssertNone
      ]))
    ])),

    Logger.t('findClosestPositionInAboveCell', GeneralSteps.sequence([
      Logger.t('Should return first positon in the top/right cell', Chain.asStep(viewBlock, [
        cSetHtml([
          '<table style="border-collapse: collapse" border="1">',
            '<tbody>',
              '<tr>',
                '<td style="width: 20px; height: 20px;">a</td>',
                '<td style="width: 20px; height: 20px;">b</td>',
              '</tr>',
              '<tr>',
                '<td style="width: 20px; height: 20px;">c</td>',
                '<td style="width: 20px; height: 20px;">d</td>',
              '</tr>',
            '</tbody>',
          '</table>',
        ].join('')),
        cFindClosestPositionInAboveCell([0, 0, 1, 1], 0),
        cAssertCaretPosition([0, 0, 0, 1, 0], 0)
      ])),
      Logger.t('Should return last positon in the top/right cell', Chain.asStep(viewBlock, [
        cSetHtml([
          '<table style="border-collapse: collapse" border="1">',
            '<tbody>',
              '<tr>',
                '<td style="width: 20px; height: 20px;">a</td>',
                '<td style="width: 20px; height: 20px;">b</td>',
              '</tr>',
              '<tr>',
                '<td style="width: 20px; height: 20px;">c</td>',
                '<td style="width: 20px; height: 20px;">d</td>',
              '</tr>',
            '</tbody>',
          '</table>',
        ].join('')),
        cFindClosestPositionInAboveCell([0, 0, 1, 1], 1),
        cAssertCaretPosition([0, 0, 0, 1, 0], 1)
      ])),
      Logger.t('Should return first positon in the bottom/right cell', Chain.asStep(viewBlock, [
        cSetHtml([
          '<table style="border-collapse: collapse" border="1">',
            '<tbody>',
              '<tr>',
                '<td style="width: 20px; height: 20px;">a</td>',
                '<td style="width: 20px; height: 20px;">b</td>',
              '</tr>',
              '<tr>',
                '<td style="width: 20px; height: 20px;">c</td>',
                '<td style="width: 20px; height: 20px;">d</td>',
              '</tr>',
            '</tbody>',
          '</table>',
        ].join('')),
        cFindClosestPositionInBelowCell([0, 0, 0, 1], 0),
        cAssertCaretPosition([0, 0, 1, 1, 0], 0)
      ])),
      Logger.t('Should return last positon in the bottom/right cell', Chain.asStep(viewBlock, [
        cSetHtml([
          '<table style="border-collapse: collapse" border="1">',
            '<tbody>',
              '<tr>',
                '<td style="width: 20px; height: 20px;">a</td>',
                '<td style="width: 20px; height: 20px;">b</td>',
              '</tr>',
              '<tr>',
                '<td style="width: 20px; height: 20px;">c</td>',
                '<td style="width: 20px; height: 20px;">d</td>',
              '</tr>',
            '</tbody>',
          '</table>',
        ].join('')),
        cFindClosestPositionInBelowCell([0, 0, 0, 1], 1),
        cAssertCaretPosition([0, 0, 1, 1, 0], 1)
      ]))
    ]))
  ], function () {
    viewBlock.detach();
    success();
  }, failure);
});