import { loadHTMLFixture, setHTMLFixture, resetHTMLFixture } from 'helpers/fixtures';
import FilteredSearchSpecHelper from 'helpers/filtered_search_spec_helper';
import DropdownUtils from '~/filtered_search/dropdown_utils';
import FilteredSearchDropdownManager from '~/filtered_search/filtered_search_dropdown_manager';
import IssuableFilteredSearchTokenKeys from '~/filtered_search/issuable_filtered_search_token_keys';

describe('Dropdown Utils', () => {
  const issuableListFixture = 'merge_requests/merge_request_list.html';

  describe('getEscapedText', () => {
    it('should return same word when it has no space', () => {
      const escaped = DropdownUtils.getEscapedText('textWithoutSpace');

      expect(escaped).toBe('textWithoutSpace');
    });

    it('should escape with double quotes', () => {
      let escaped = DropdownUtils.getEscapedText('text with space');

      expect(escaped).toBe('"text with space"');

      escaped = DropdownUtils.getEscapedText("won't fix");

      expect(escaped).toBe('"won\'t fix"');
    });

    it('should escape with single quotes', () => {
      const escaped = DropdownUtils.getEscapedText('won"t fix');

      expect(escaped).toBe("'won\"t fix'");
    });

    it('should escape with single quotes by default', () => {
      const escaped = DropdownUtils.getEscapedText('won"t\' fix');

      expect(escaped).toBe("'won\"t' fix'");
    });
  });

  describe('filterWithSymbol', () => {
    let input;
    const item = {
      title: '@root',
    };

    beforeEach(() => {
      setHTMLFixture(`
        <input type="text" id="test" />
      `);

      input = document.getElementById('test');
    });

    afterEach(() => {
      resetHTMLFixture();
    });

    it('should filter without symbol', () => {
      input.value = 'roo';

      const updatedItem = DropdownUtils.filterWithSymbol('@', input, item);

      expect(updatedItem.droplab_hidden).toBe(false);
    });

    it('should filter with symbol', () => {
      input.value = '@roo';

      const updatedItem = DropdownUtils.filterWithSymbol('@', input, item);

      expect(updatedItem.droplab_hidden).toBe(false);
    });

    describe('filters multiple word title', () => {
      const multipleWordItem = {
        title: 'Community Contributions',
      };

      it('should filter with double quote', () => {
        input.value = '"';

        const updatedItem = DropdownUtils.filterWithSymbol('~', input, multipleWordItem);

        expect(updatedItem.droplab_hidden).toBe(false);
      });

      it('should filter with double quote and symbol', () => {
        input.value = '~"';

        const updatedItem = DropdownUtils.filterWithSymbol('~', input, multipleWordItem);

        expect(updatedItem.droplab_hidden).toBe(false);
      });

      it('should filter with double quote and multiple words', () => {
        input.value = '"community con';

        const updatedItem = DropdownUtils.filterWithSymbol('~', input, multipleWordItem);

        expect(updatedItem.droplab_hidden).toBe(false);
      });

      it('should filter with double quote, symbol and multiple words', () => {
        input.value = '~"community con';

        const updatedItem = DropdownUtils.filterWithSymbol('~', input, multipleWordItem);

        expect(updatedItem.droplab_hidden).toBe(false);
      });

      it('should filter with single quote', () => {
        input.value = "'";

        const updatedItem = DropdownUtils.filterWithSymbol('~', input, multipleWordItem);

        expect(updatedItem.droplab_hidden).toBe(false);
      });

      it('should filter with single quote and symbol', () => {
        input.value = "~'";

        const updatedItem = DropdownUtils.filterWithSymbol('~', input, multipleWordItem);

        expect(updatedItem.droplab_hidden).toBe(false);
      });

      it('should filter with single quote and multiple words', () => {
        input.value = "'community con";

        const updatedItem = DropdownUtils.filterWithSymbol('~', input, multipleWordItem);

        expect(updatedItem.droplab_hidden).toBe(false);
      });

      it('should filter with single quote, symbol and multiple words', () => {
        input.value = "~'community con";

        const updatedItem = DropdownUtils.filterWithSymbol('~', input, multipleWordItem);

        expect(updatedItem.droplab_hidden).toBe(false);
      });
    });
  });

  describe('filterHint', () => {
    let input;
    let allowedKeys;

    beforeEach(() => {
      setHTMLFixture(`
        <ul class="tokens-container">
          <li class="input-token">
            <input class="filtered-search" type="text" id="test" />
          </li>
        </ul>
      `);

      input = document.getElementById('test');
      allowedKeys = IssuableFilteredSearchTokenKeys.getKeys();
    });

    function config() {
      return {
        input,
        allowedKeys,
      };
    }

    it('should filter', () => {
      input.value = 'l';
      let updatedItem = DropdownUtils.filterHint(config(), {
        hint: 'label',
      });

      expect(updatedItem.droplab_hidden).toBe(false);

      input.value = 'o';
      updatedItem = DropdownUtils.filterHint(config(), {
        hint: 'label',
      });

      expect(updatedItem.droplab_hidden).toBe(true);
    });

    it('should return droplab_hidden false when item has no hint', () => {
      const updatedItem = DropdownUtils.filterHint(config(), {}, '');

      expect(updatedItem.droplab_hidden).toBe(false);
    });

    it('should allow multiple if item.type is array', () => {
      input.value = 'label:~first la';
      const updatedItem = DropdownUtils.filterHint(config(), {
        hint: 'label',
        type: 'array',
      });

      expect(updatedItem.droplab_hidden).toBe(false);
    });

    it('should prevent multiple if item.type is not array', () => {
      input.value = 'milestone:~first mile';
      let updatedItem = DropdownUtils.filterHint(config(), {
        hint: 'milestone',
      });

      expect(updatedItem.droplab_hidden).toBe(true);

      updatedItem = DropdownUtils.filterHint(config(), {
        hint: 'milestone',
        type: 'string',
      });

      expect(updatedItem.droplab_hidden).toBe(true);
    });
  });

  describe('setDataValueIfSelected', () => {
    beforeEach(() => {
      jest.spyOn(FilteredSearchDropdownManager, 'addWordToInput').mockImplementation(() => {});
    });

    it('calls addWordToInput when dataValue exists', () => {
      const selected = {
        getAttribute: () => 'value',
        hasAttribute: () => false,
      };

      DropdownUtils.setDataValueIfSelected(null, '=', selected);

      expect(FilteredSearchDropdownManager.addWordToInput.mock.calls.length).toEqual(1);
    });

    it('returns true when dataValue exists', () => {
      const selected = {
        getAttribute: () => 'value',
        hasAttribute: () => false,
      };

      const result = DropdownUtils.setDataValueIfSelected(null, '=', selected);
      const result2 = DropdownUtils.setDataValueIfSelected(null, '!=', selected);

      expect(result).toBe(true);
      expect(result2).toBe(true);
    });

    it('returns false when dataValue does not exist', () => {
      const selected = {
        getAttribute: () => null,
      };

      const result = DropdownUtils.setDataValueIfSelected(null, '=', selected);
      const result2 = DropdownUtils.setDataValueIfSelected(null, '!=', selected);

      expect(result).toBe(false);
      expect(result2).toBe(false);
    });
  });

  describe('getInputSelectionPosition', () => {
    describe('word with trailing spaces', () => {
      const value = 'label:none ';

      it('should return selectionStart when cursor is at the trailing space', () => {
        const { left, right } = DropdownUtils.getInputSelectionPosition({
          selectionStart: 11,
          value,
        });

        expect(left).toBe(11);
        expect(right).toBe(11);
      });

      it('should return input when cursor is at the start of input', () => {
        const { left, right } = DropdownUtils.getInputSelectionPosition({
          selectionStart: 0,
          value,
        });

        expect(left).toBe(0);
        expect(right).toBe(10);
      });

      it('should return input when cursor is at the middle of input', () => {
        const { left, right } = DropdownUtils.getInputSelectionPosition({
          selectionStart: 7,
          value,
        });

        expect(left).toBe(0);
        expect(right).toBe(10);
      });

      it('should return input when cursor is at the end of input', () => {
        const { left, right } = DropdownUtils.getInputSelectionPosition({
          selectionStart: 10,
          value,
        });

        expect(left).toBe(0);
        expect(right).toBe(10);
      });
    });

    describe('multiple words', () => {
      const value = 'label:~"Community Contribution"';

      it('should return input when cursor is after the first word', () => {
        const { left, right } = DropdownUtils.getInputSelectionPosition({
          selectionStart: 17,
          value,
        });

        expect(left).toBe(0);
        expect(right).toBe(31);
      });

      it('should return input when cursor is before the second word', () => {
        const { left, right } = DropdownUtils.getInputSelectionPosition({
          selectionStart: 18,
          value,
        });

        expect(left).toBe(0);
        expect(right).toBe(31);
      });
    });

    describe('incomplete multiple words', () => {
      const value = 'label:~"Community Contribution';

      it('should return entire input when cursor is at the start of input', () => {
        const { left, right } = DropdownUtils.getInputSelectionPosition({
          selectionStart: 0,
          value,
        });

        expect(left).toBe(0);
        expect(right).toBe(30);
      });

      it('should return entire input when cursor is at the end of input', () => {
        const { left, right } = DropdownUtils.getInputSelectionPosition({
          selectionStart: 30,
          value,
        });

        expect(left).toBe(0);
        expect(right).toBe(30);
      });
    });
  });

  describe('getSearchQuery', () => {
    let authorToken;

    beforeEach(() => {
      loadHTMLFixture(issuableListFixture);

      authorToken = FilteredSearchSpecHelper.createFilterVisualToken('author', '=', '@user');
      const searchTermToken = FilteredSearchSpecHelper.createSearchVisualToken('search term');

      const tokensContainer = document.querySelector('.tokens-container');
      tokensContainer.appendChild(searchTermToken);
      tokensContainer.appendChild(authorToken);
    });

    it('uses original value if present', () => {
      const originalValue = 'original dance';
      const valueContainer = authorToken.querySelector('.value-container');
      valueContainer.dataset.originalValue = originalValue;

      const searchQuery = DropdownUtils.getSearchQuery();

      expect(searchQuery).toBe(' search term author:=original dance');
    });
  });
});