import { beforeEach, describe, expect, it, vi } from 'vitest';
import type { IIssueRepository } from '../../../domain/repositories/issue.repository.interface.js';
import { GetIssueStatsUseCase } from './get-issue-stats.use-case.js';

describe('GetIssueStatsUseCase', () => {
  let repository: IIssueRepository;
  let useCase: GetIssueStatsUseCase;

  beforeEach(() => {
    repository = {
      findById: vi.fn(),
      findByCKey: vi.fn(),
      findAll: vi.fn(),
      countByStatus: vi.fn(),
      create: vi.fn(),
      update: vi.fn(),
      delete: vi.fn(),
    };
    useCase = new GetIssueStatsUseCase(repository);
  });

  it('returns counts for every known status, including those with zero issues', async () => {
    vi.mocked(repository.countByStatus).mockResolvedValue([
      { status: 'OPEN', count: 5 },
      { status: 'DONE', count: 2 },
    ]);

    const stats = await useCase.execute('user-1');

    expect(stats.total).toBe(7);
    expect(stats.byStatus).toEqual([
      { status: 'OPEN', label: 'Open', count: 5 },
      { status: 'IN_PROGRESS', label: 'In progress', count: 0 },
      { status: 'DONE', label: 'Done', count: 2 },
      { status: 'CANCELLED', label: 'Cancelled', count: 0 },
    ]);
  });

  it('returns all-zero stats when there are no issues', async () => {
    vi.mocked(repository.countByStatus).mockResolvedValue([]);

    const stats = await useCase.execute('user-1');

    expect(stats.total).toBe(0);
    expect(stats.byStatus.every((entry) => entry.count === 0)).toBe(true);
  });
});