import {
  IssueReadModel,
  NotificationKind,
} from '@task-stream/api/tracker/domain';
import { dueStage, nextDay, remindersFor } from './reminders';

const issue = (id: string, dueDate: string, watchers: string[] = []) =>
  ({
    id,
    key: `WEB-${id}`,
    title: `T${id}`,
    projectId: 'p',
    projectKey: 'WEB',
    dueDate,
    assignee: { id: 'ana', name: 'Ana' },
    watchers: watchers.map((w) => ({ id: w, name: w })),
  }) as IssueReadModel;

describe('due reminders', () => {
  it('tells the stage of a due date', () => {
    expect(nextDay('2026-12-31')).toBe('2027-01-01');
    expect(dueStage('2026-10-09', '2026-10-08')).toBe('tomorrow');
    expect(dueStage('2026-10-08', '2026-10-08')).toBe('today');
    expect(dueStage('2026-10-01', '2026-10-08')).toBe('overdue');
    expect(dueStage('2026-10-20', '2026-10-08')).toBeNull();
  });

  it('reminds whoever has it and whoever follows it, once per stage', () => {
    const reminders = remindersFor(
      [issue('1', '2026-10-08', ['ana', 'bob']), issue('2', '2026-10-30')],
      '2026-10-08',
      '2026-10-08T07:00:00Z',
    );
    expect(reminders.map((r) => [r.userId, r.summary])).toEqual([
      ['ana', 'WEB-1 vence hoy: T1'],
      ['bob', 'WEB-1 vence hoy: T1'],
    ]);
    expect(reminders[0]).toMatchObject({
      kind: NotificationKind.REMINDER,
      id: 'reminder:1:2026-10-08:today:ana',
    });
  });
});