import { mount } from '@vue/test-utils';
import Vue, { nextTick } from 'vue';
import Vuex from 'vuex';

import waitForPromises from 'helpers/wait_for_promises';

import DiffsModule from '~/diffs/store/modules';

import NoteActions from '~/notes/components/note_actions.vue';
import NoteBody from '~/notes/components/note_body.vue';
import NoteHeader from '~/notes/components/note_header.vue';
import issueNote from '~/notes/components/noteable_note.vue';
import NotesModule from '~/notes/stores/modules';

import UserAvatarLink from '~/vue_shared/components/user_avatar/user_avatar_link.vue';

import { noteableDataMock, notesDataMock, note } from '../mock_data';

Vue.use(Vuex);

const singleLineNotePosition = {
  line_range: {
    start: {
      line_code: 'abc_1_1',
      type: null,
      old_line: '1',
      new_line: '1',
    },
    end: {
      line_code: 'abc_1_1',
      type: null,
      old_line: '1',
      new_line: '1',
    },
  },
};

describe('issue_note', () => {
  let store;
  let wrapper;
  const findMultilineComment = () => wrapper.find('[data-testid="multiline-comment"]');

  const createWrapper = (props = {}, storeUpdater = (s) => s) => {
    store = new Vuex.Store(
      storeUpdater({
        modules: {
          notes: NotesModule(),
          diffs: DiffsModule(),
        },
      }),
    );

    store.dispatch('setNoteableData', noteableDataMock);
    store.dispatch('setNotesData', notesDataMock);

    wrapper = mount(issueNote, {
      store,
      propsData: {
        note,
        ...props,
      },
      stubs: [
        'note-header',
        'user-avatar-link',
        'note-actions',
        'note-body',
        'multiline-comment-form',
      ],
    });
  };

  afterEach(() => {
    wrapper.destroy();
  });

  describe('mutiline comments', () => {
    beforeEach(() => {
      createWrapper();
    });

    it('should render if has multiline comment', async () => {
      const position = {
        line_range: {
          start: {
            line_code: 'abc_1_1',
            type: null,
            old_line: '1',
            new_line: '1',
          },
          end: {
            line_code: 'abc_2_2',
            type: null,
            old_line: '2',
            new_line: '2',
          },
        },
      };
      const line = {
        line_code: 'abc_1_1',
        type: null,
        old_line: '1',
        new_line: '1',
      };
      wrapper.setProps({
        note: { ...note, position },
        discussionRoot: true,
        line,
      });

      await nextTick();
      expect(findMultilineComment().text()).toBe('Comment on lines 1 to 2');
    });

    it('should only render if it has everything it needs', async () => {
      const position = {
        line_range: {
          start: {
            line_code: 'abc_1_1',
            type: null,
            old_line: '',
            new_line: '',
          },
          end: {
            line_code: 'abc_2_2',
            type: null,
            old_line: '2',
            new_line: '2',
          },
        },
      };
      const line = {
        line_code: 'abc_1_1',
        type: null,
        old_line: '1',
        new_line: '1',
      };
      wrapper.setProps({
        note: { ...note, position },
        discussionRoot: true,
        line,
      });

      await nextTick();
      expect(findMultilineComment().exists()).toBe(false);
    });

    it('should not render if has single line comment', async () => {
      const position = {
        line_range: {
          start: {
            line_code: 'abc_1_1',
            type: null,
            old_line: '1',
            new_line: '1',
          },
          end: {
            line_code: 'abc_1_1',
            type: null,
            old_line: '1',
            new_line: '1',
          },
        },
      };
      const line = {
        line_code: 'abc_1_1',
        type: null,
        old_line: '1',
        new_line: '1',
      };
      wrapper.setProps({
        note: { ...note, position },
        discussionRoot: true,
        line,
      });

      await nextTick();
      expect(findMultilineComment().exists()).toBe(false);
    });

    it('should not render if `line_range` is unavailable', () => {
      expect(findMultilineComment().exists()).toBe(false);
    });
  });

  describe('rendering', () => {
    beforeEach(() => {
      createWrapper();
    });

    describe('avatar sizes in diffs', () => {
      const line = {
        line_code: 'abc_1_1',
        type: null,
        old_line: '1',
        new_line: '1',
      };

      it('should render 24px avatars', async () => {
        wrapper.setProps({
          note: { ...note },
          discussionRoot: true,
          line,
        });

        await nextTick();

        expect(wrapper.findComponent(UserAvatarLink).props('imgSize')).toBe(24);
      });
    });

    it('should render user information', () => {
      const { author } = note;
      const avatar = wrapper.findComponent(UserAvatarLink);
      const avatarProps = avatar.props();

      expect(avatarProps.linkHref).toBe(author.path);
      expect(avatarProps.imgSrc).toBe(author.avatar_url);
      expect(avatarProps.imgAlt).toBe(author.name);
      expect(avatarProps.imgSize).toBe(40);
    });

    it('should render note header content', () => {
      const noteHeader = wrapper.findComponent(NoteHeader);
      const noteHeaderProps = noteHeader.props();

      expect(noteHeaderProps.author).toBe(note.author);
      expect(noteHeaderProps.createdAt).toBe(note.created_at);
      expect(noteHeaderProps.noteId).toBe(note.id);
    });

    it('should render note actions', () => {
      const { author } = note;
      const noteActions = wrapper.findComponent(NoteActions);
      const noteActionsProps = noteActions.props();

      expect(noteActionsProps.authorId).toBe(author.id);
      expect(noteActionsProps.noteId).toBe(note.id);
      expect(noteActionsProps.noteUrl).toBe(note.noteable_note_url);
      expect(noteActionsProps.accessLevel).toBe(note.human_access);
      expect(noteActionsProps.canEdit).toBe(note.current_user.can_edit);
      expect(noteActionsProps.canAwardEmoji).toBe(note.current_user.can_award_emoji);
      expect(noteActionsProps.canDelete).toBe(note.current_user.can_edit);
      expect(noteActionsProps.canReportAsAbuse).toBe(true);
      expect(noteActionsProps.canResolve).toBe(false);
      expect(noteActionsProps.reportAbusePath).toBe(note.report_abuse_path);
      expect(noteActionsProps.resolvable).toBe(false);
      expect(noteActionsProps.isResolved).toBe(false);
      expect(noteActionsProps.isResolving).toBe(false);
      expect(noteActionsProps.resolvedBy).toEqual({});
    });

    it('should render issue body', () => {
      const noteBody = wrapper.findComponent(NoteBody);
      const noteBodyProps = noteBody.props();

      expect(noteBodyProps.note).toBe(note);
      expect(noteBodyProps.line).toBe(null);
      expect(noteBodyProps.canEdit).toBe(note.current_user.can_edit);
      expect(noteBodyProps.isEditing).toBe(false);
      expect(noteBodyProps.helpPagePath).toBe('');
    });

    it('prevents note preview xss', async () => {
      const noteBody =
        '<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" onload="alert(1)" />';
      const alertSpy = jest.spyOn(window, 'alert').mockImplementation(() => {});
      const noteBodyComponent = wrapper.findComponent(NoteBody);

      store.hotUpdate({
        modules: {
          notes: {
            actions: {
              updateNote() {},
              setSelectedCommentPositionHover() {},
            },
          },
        },
      });

      noteBodyComponent.vm.$emit('handleFormUpdate', {
        noteText: noteBody,
        parentElement: null,
        callback: () => {},
      });

      await waitForPromises();
      expect(alertSpy).not.toHaveBeenCalled();
      expect(wrapper.vm.note.note_html).toBe(
        '<p><img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7"></p>\n',
      );
    });
  });

  describe('cancel edit', () => {
    beforeEach(() => {
      createWrapper();
    });

    it('restores content of updated note', async () => {
      const updatedText = 'updated note text';
      store.hotUpdate({
        modules: {
          notes: {
            actions: {
              updateNote() {},
            },
          },
        },
      });
      const noteBody = wrapper.findComponent(NoteBody);
      noteBody.vm.resetAutoSave = () => {};

      noteBody.vm.$emit('handleFormUpdate', {
        noteText: updatedText,
        parentElement: null,
        callback: () => {},
      });

      await nextTick();
      let noteBodyProps = noteBody.props();

      expect(noteBodyProps.note.note_html).toBe(`<p>${updatedText}</p>\n`);

      noteBody.vm.$emit('cancelForm', {});
      await nextTick();

      noteBodyProps = noteBody.props();

      expect(noteBodyProps.note.note_html).toBe(note.note_html);
    });
  });

  describe('formUpdateHandler', () => {
    const updateNote = jest.fn();
    const params = {
      noteText: '',
      parentElement: null,
      callback: jest.fn(),
      resolveDiscussion: false,
    };

    const updateActions = () => {
      store.hotUpdate({
        modules: {
          notes: {
            actions: {
              updateNote,
              setSelectedCommentPositionHover() {},
            },
          },
        },
      });
    };

    afterEach(() => updateNote.mockReset());

    it('responds to handleFormUpdate', () => {
      createWrapper();
      updateActions();
      wrapper.findComponent(NoteBody).vm.$emit('handleFormUpdate', params);
      expect(wrapper.emitted('handleUpdateNote')).toBeTruthy();
    });

    it('does not stringify empty position', () => {
      createWrapper();
      updateActions();
      wrapper.findComponent(NoteBody).vm.$emit('handleFormUpdate', params);
      expect(updateNote.mock.calls[0][1].note.note.position).toBeUndefined();
    });

    it('stringifies populated position', () => {
      const position = { test: true };
      const expectation = JSON.stringify(position);
      createWrapper({ note: { ...note, position } });
      updateActions();
      wrapper.findComponent(NoteBody).vm.$emit('handleFormUpdate', params);
      expect(updateNote.mock.calls[0][1].note.note.position).toBe(expectation);
    });
  });

  describe('diffFile', () => {
    it.each`
      scenario                         | files        | noteDef
      ${'the note has no position'}    | ${undefined} | ${note}
      ${'the Diffs store has no data'} | ${[]}        | ${{ ...note, position: singleLineNotePosition }}
    `(
      'returns `null` when $scenario and no diff file is provided as a prop',
      ({ noteDef, diffs }) => {
        const storeUpdater = (rawStore) => {
          const updatedStore = { ...rawStore };

          if (diffs) {
            updatedStore.modules.diffs.state.diffFiles = diffs;
          }

          return updatedStore;
        };

        createWrapper({ note: noteDef, discussionFile: null }, storeUpdater);

        expect(wrapper.vm.diffFile).toBe(null);
      },
    );

    it("returns the correct diff file from the Diffs store if it's available", () => {
      createWrapper(
        {
          note: { ...note, position: singleLineNotePosition },
        },
        (rawStore) => {
          const updatedStore = { ...rawStore };
          updatedStore.modules.diffs.state.diffFiles = [
            { file_hash: 'abc', testId: 'diffFileTest' },
          ];
          return updatedStore;
        },
      );

      expect(wrapper.vm.diffFile.testId).toBe('diffFileTest');
    });

    it('returns the provided diff file if the more robust getters fail', () => {
      createWrapper(
        {
          note: { ...note, position: singleLineNotePosition },
          discussionFile: { testId: 'diffFileTest' },
        },
        (rawStore) => {
          const updatedStore = { ...rawStore };
          updatedStore.modules.diffs.state.diffFiles = [];
          return updatedStore;
        },
      );

      expect(wrapper.vm.diffFile.testId).toBe('diffFileTest');
    });
  });
});