import { Assertions, GeneralSteps, Logger, Pipeline, Step } from '@ephox/agar';
import { Hierarchy, Element } from '@ephox/sugar';
import RangeNormalizer from 'tinymce/core/selection/RangeNormalizer';
import ViewBlock from '../../module/test/ViewBlock';
import { UnitTest } from '@ephox/bedrock';

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

  const sSetContent = function (html) {
    return Step.sync(function () {
      viewBlock.update(html);
    });
  };

  const mNormalizeRange = Step.stateful(function (value, next, die) {
    next(RangeNormalizer.normalize(value));
  });

  const mCreateRange = function (startPath, startOffset, endPath, endOffset) {
    return Step.stateful(function (value, next, die) {
      const startContainer = Hierarchy.follow(Element.fromDom(viewBlock.get()), startPath).getOrDie();
      const endContainer = Hierarchy.follow(Element.fromDom(viewBlock.get()), endPath).getOrDie();
      const rng = document.createRange();
      rng.setStart(startContainer.dom(), startOffset);
      rng.setEnd(endContainer.dom(), endOffset);
      next(rng);
    });
  };

  const mAssertRange = function (startPath, startOffset, endPath, endOffset) {
    return Step.stateful(function (value, next, die) {
      const startContainer = Hierarchy.follow(Element.fromDom(viewBlock.get()), startPath).getOrDie();
      const endContainer = Hierarchy.follow(Element.fromDom(viewBlock.get()), endPath).getOrDie();

      Assertions.assertDomEq('Should be expected startContainer', startContainer, Element.fromDom(value.startContainer));
      Assertions.assertEq('Should be expected startOffset', startOffset, value.startOffset);
      Assertions.assertDomEq('Should be expected endContainer', endContainer, Element.fromDom(value.endContainer));
      Assertions.assertEq('Should be expected endOffset', endOffset, value.endOffset);

      next(value);
    });
  };

  viewBlock.attach();
  Pipeline.async({}, [
    Logger.t('Normalize range no change', GeneralSteps.sequence([
      sSetContent('<p><br></p>'),
      mCreateRange([0], 0, [0], 0),
      mNormalizeRange,
      mAssertRange([0], 0, [0], 0)
    ])),
    Logger.t('Normalize webkit triple click selection paragraph', GeneralSteps.sequence([
      sSetContent('<blockquote><p>a</p></blockquote><p>b</p>'),
      mCreateRange([0, 0, 0], 0, [1], 0),
      mNormalizeRange,
      mAssertRange([0, 0, 0], 0, [0, 0, 0], 1)
    ])),
    Logger.t('Normalize webkit triple click selection heading', GeneralSteps.sequence([
      sSetContent('<blockquote><p>a</p></blockquote><h1>b</h1>'),
      mCreateRange([0, 0, 0], 0, [1], 0),
      mNormalizeRange,
      mAssertRange([0, 0, 0], 0, [0, 0, 0], 1)
    ])),
    Logger.t('Normalize webkit triple click selection headings', GeneralSteps.sequence([
      sSetContent('<blockquote><h1>a</h1></blockquote><h1>b</h1>'),
      mCreateRange([0, 0, 0], 0, [1], 0),
      mNormalizeRange,
      mAssertRange([0, 0, 0], 0, [0, 0, 0], 1)
    ])),
    Logger.t('Normalize webkit triple click selection divs', GeneralSteps.sequence([
      sSetContent('<blockquote><div>a</div></blockquote><div>b</div>'),
      mCreateRange([0, 0, 0], 0, [1], 0),
      mNormalizeRange,
      mAssertRange([0, 0, 0], 0, [0, 0, 0], 1)
    ])),
    Logger.t('Normalize webkit triple click selection between LI:s', GeneralSteps.sequence([
      sSetContent('<ul><li>a</li></ul><ul><li>b</li></ul>'),
      mCreateRange([0, 0, 0], 0, [1, 0], 0),
      mNormalizeRange,
      mAssertRange([0, 0, 0], 0, [0, 0, 0], 1)
    ])),
    Logger.t('Normalize from block start to previous block end', GeneralSteps.sequence([
      sSetContent('<p>a</p><p>b<p>'),
      mCreateRange([0, 0], 0, [1, 0], 0),
      mNormalizeRange,
      mAssertRange([0, 0], 0, [0, 0], 1)
    ])),
    Logger.t('Do not normalize when end position has a valid previous position in the block', GeneralSteps.sequence([
      sSetContent('<p>a</p><p>b<p>'),
      mCreateRange([0, 0], 0, [1, 0], 1),
      mNormalizeRange,
      mAssertRange([0, 0], 0, [1, 0], 1)
    ])),
    Logger.t('Do not normalize when selection is on inline elements', GeneralSteps.sequence([
      sSetContent('<b>a</b><b>b<b>'),
      mCreateRange([0, 0], 0, [1, 0], 0),
      mNormalizeRange,
      mAssertRange([0, 0], 0, [1, 0], 0)
    ]))
  ], function () {
    viewBlock.detach();
    success();
  }, failure);
});