import { BoardColumn, IssueSummary } from '@task-stream/web/tracker/domain';
import { applyIssueChange, moveIssue } from './board.reducers';

const issue = (
  id: string,
  status: string,
  version = 1,
  assignee: string | null = null,
): IssueSummary =>
  ({
    id,
    status,
    version,
    key: id,
    projectId: 'p',
    title: id,
    assignee: assignee ? { id: assignee, name: assignee } : null,
    release: null,
    area: null,
    labels: [],
    commentCount: 0,
  }) as unknown as IssueSummary;

const board = (): BoardColumn[] => [
  {
    status: 'TODO',
    total: 1,
    issues: [issue('a', 'TODO')],
  },
  { status: 'IN_PROGRESS', total: 0, issues: [] },
];

describe('board reducers', () => {
  it('moves a card optimistically', () => {
    const next = moveIssue(board(), 'a', 'IN_PROGRESS');
    expect(next[0]).toMatchObject({ total: 0, issues: [] });
    expect(next[1].issues[0]).toMatchObject({
      id: 'a',
      status: 'IN_PROGRESS',
    });
    expect(next[1].total).toBe(1);
  });

  it('applies newer realtime versions and ignores stale ones', () => {
    const moved = applyIssueChange(board(), issue('a', 'IN_PROGRESS', 2), null);
    expect(moved[1].issues.map((i) => i.id)).toEqual(['a']);

    const stale = applyIssueChange(moved, issue('a', 'TODO', 1), null);
    expect(stale).toBe(moved);
  });

  it('drops issues that no longer match the filter', () => {
    const next = applyIssueChange(board(), issue('a', 'TODO', 2, 'bob'), {
      projectId: 'p',
      assigneeId: 'ana',
    });
    expect(next[0].issues).toEqual([]);
  });

  it('adds new issues from other users', () => {
    const next = applyIssueChange(board(), issue('b', 'TODO', 1), null);
    expect(next[0].issues.map((i) => i.id)).toEqual(['b', 'a']);
  });
});