import Vue from 'vue';
import MRWidgetRelatedLinks from '~/vue_merge_request_widget/components/mr_widget_related_links';

describe('MRWidgetRelatedLinks', () => {
  let vm;

  beforeEach(() => {
    const Component = Vue.extend(MRWidgetRelatedLinks);
    vm = new Component({
      el: document.createElement('div'),
      propsData: {
        isMerged: false,
        relatedLinks: {},
      },
    });
  });

  afterEach(() => {
    vm.$destroy();
  });

  describe('props', () => {
    it('should have props', () => {
      const { isMerged, relatedLinks } = MRWidgetRelatedLinks.props;

      expect(isMerged).toBeDefined();
      expect(isMerged.type).toBe(Boolean);
      expect(isMerged.required).toBeTruthy();
      expect(relatedLinks).toBeDefined();
      expect(relatedLinks.type instanceof Object).toBeTruthy();
      expect(relatedLinks.required).toBeTruthy();
    });
  });

  describe('computed', () => {
    describe('closingText', () => {
      const dummyIssueLabel = 'dummy label';

      beforeEach(() => {
        spyOn(vm, 'issueLabel').and.returnValue(dummyIssueLabel);
      });

      it('outputs text for closing issues', () => {
        vm.isMerged = false;

        const text = vm.closingText;

        expect(text).toBe(`Closes ${dummyIssueLabel}`);
      });

      it('outputs text for closed issues', () => {
        vm.isMerged = true;

        const text = vm.closingText;

        expect(text).toBe(`Closed ${dummyIssueLabel}`);
      });
    });

    describe('hasLinks', () => {
      it('should return correct value when we have links reference', () => {
        vm.relatedLinks = {
          closing: '/foo',
          mentioned: '/foo',
          assignToMe: '/foo',
        };

        expect(vm.hasLinks).toBeTruthy();

        vm.relatedLinks.closing = null;
        expect(vm.hasLinks).toBeTruthy();

        vm.relatedLinks.mentioned = null;
        expect(vm.hasLinks).toBeTruthy();

        vm.relatedLinks.assignToMe = null;
        expect(vm.hasLinks).toBeFalsy();
      });
    });

    describe('mentionedText', () => {
      it('outputs text for one mentioned issue before merging', () => {
        vm.isMerged = false;
        spyOn(vm, 'hasMultipleIssues').and.returnValue(false);

        const text = vm.mentionedText;

        expect(text).toBe('is mentioned but will not be closed');
      });

      it('outputs text for one mentioned issue after merging', () => {
        vm.isMerged = true;
        spyOn(vm, 'hasMultipleIssues').and.returnValue(false);

        const text = vm.mentionedText;

        expect(text).toBe('is mentioned but was not closed');
      });

      it('outputs text for multiple mentioned issue before merging', () => {
        vm.isMerged = false;
        spyOn(vm, 'hasMultipleIssues').and.returnValue(true);

        const text = vm.mentionedText;

        expect(text).toBe('are mentioned but will not be closed');
      });

      it('outputs text for multiple mentioned issue after merging', () => {
        vm.isMerged = true;
        spyOn(vm, 'hasMultipleIssues').and.returnValue(true);

        const text = vm.mentionedText;

        expect(text).toBe('are mentioned but were not closed');
      });
    });
  });

  describe('methods', () => {
    const relatedLinks = {
      oneIssue: '<a href="#">#7</a>',
      twoIssues: '<a href="#">#23</a> and <a>#42</a>',
      threeIssues: '<a href="#">#1</a>, <a>#2</a>, and <a>#3</a>',
    };

    beforeEach(() => {
      vm.relatedLinks = relatedLinks;
    });

    describe('hasMultipleIssues', () => {
      it('should return true if the given text has multiple issues', () => {
        expect(vm.hasMultipleIssues(relatedLinks.twoIssues)).toBeTruthy();
        expect(vm.hasMultipleIssues(relatedLinks.threeIssues)).toBeTruthy();
      });

      it('should return false if the given text has one issue', () => {
        expect(vm.hasMultipleIssues(relatedLinks.oneIssue)).toBeFalsy();
      });
    });

    describe('issueLabel', () => {
      it('should return true if the given text has multiple issues', () => {
        expect(vm.issueLabel('twoIssues')).toEqual('issues');
        expect(vm.issueLabel('threeIssues')).toEqual('issues');
      });

      it('should return false if the given text has one issue', () => {
        expect(vm.issueLabel('oneIssue')).toEqual('issue');
      });
    });
  });

  describe('template', () => {
    it('should have only have closing issues text', (done) => {
      vm.relatedLinks = {
        closing: '<a href="#">#23</a> and <a>#42</a>',
      };

      Vue.nextTick()
      .then(() => {
        const content = vm.$el.textContent.replace(/\n(\s)+/g, ' ').trim();

        expect(content).toContain('Closes issues #23 and #42');
        expect(content).not.toContain('mentioned');
      })
      .then(done)
      .catch(done.fail);
    });

    it('should have only have mentioned issues text', (done) => {
      vm.relatedLinks = {
        mentioned: '<a href="#">#7</a>',
      };

      Vue.nextTick()
      .then(() => {
        expect(vm.$el.innerText).toContain('issue #7');
        expect(vm.$el.innerText).toContain('is mentioned but will not be closed');
        expect(vm.$el.innerText).not.toContain('Closes');
      })
      .then(done)
      .catch(done.fail);
    });

    it('should have closing and mentioned issues at the same time', (done) => {
      vm.relatedLinks = {
        closing: '<a href="#">#7</a>',
        mentioned: '<a href="#">#23</a> and <a>#42</a>',
      };

      Vue.nextTick()
      .then(() => {
        const content = vm.$el.textContent.replace(/\n(\s)+/g, ' ').trim();

        expect(content).toContain('Closes issue #7.');
        expect(content).toContain('issues #23 and #42');
        expect(content).toContain('are mentioned but will not be closed');
      })
      .then(done)
      .catch(done.fail);
    });

    it('should have assing issues link', (done) => {
      vm.relatedLinks = {
        assignToMe: '<a href="#">Assign yourself to these issues</a>',
      };

      Vue.nextTick()
      .then(() => {
        expect(vm.$el.innerText).toContain('Assign yourself to these issues');
      })
      .then(done)
      .catch(done.fail);
    });

    it('should use different wording after merging', (done) => {
      vm.isMerged = true;
      vm.relatedLinks = {
        closing: '<a href="#">#7</a>',
        mentioned: '<a href="#">#23</a> and <a>#42</a>',
      };

      Vue.nextTick()
      .then(() => {
        const content = vm.$el.textContent.replace(/\n(\s)+/g, ' ').trim();

        expect(content).toContain('Closed issue #7.');
        expect(content).toContain('issues #23 and #42');
        expect(content).toContain('are mentioned but were not closed');
      })
      .then(done)
      .catch(done.fail);
    });
  });
});