import { describe, it, expect, vi, beforeEach } from 'vitest';
import { LeagueRulebookPageQuery } from './LeagueRulebookPageQuery';
import { LeagueRulebookService } from '@/lib/services/leagues/LeagueRulebookService';
import { Result } from '@/lib/contracts/Result';
import { RulebookViewDataBuilder } from '@/lib/builders/view-data/RulebookViewDataBuilder';
import { mapToPresentationError } from '@/lib/contracts/page-queries/PresentationError';

// Mock dependencies
vi.mock('@/lib/services/leagues/LeagueRulebookService', () => ({
  LeagueRulebookService: vi.fn().mockImplementation(function (this: any) {
    this.getRulebookData = vi.fn();
  }),
}));

vi.mock('@/lib/builders/view-data/RulebookViewDataBuilder', () => ({
  RulebookViewDataBuilder: {
    build: vi.fn(),
  },
}));

vi.mock('@/lib/contracts/page-queries/PresentationError', () => ({
  mapToPresentationError: vi.fn(),
}));

describe('LeagueRulebookPageQuery', () => {
  let query: LeagueRulebookPageQuery;
  let mockServiceInstance: any;

  beforeEach(() => {
    vi.clearAllMocks();
    query = new LeagueRulebookPageQuery();
    mockServiceInstance = {
      getRulebookData: vi.fn(),
    };
    (LeagueRulebookService as any).mockImplementation(function () {
      return mockServiceInstance;
    });
  });

  it('should return view data when service succeeds', async () => {
    const leagueId = 'league-123';
    const apiDto = { rulebook: 'rules' };
    const viewData = { rulebook: 'rules' };

    mockServiceInstance.getRulebookData.mockResolvedValue(Result.ok(apiDto));
    (RulebookViewDataBuilder.build as any).mockReturnValue(viewData);

    const result = await query.execute(leagueId);

    expect(result.isOk()).toBe(true);
    expect(result.unwrap()).toEqual(viewData);
    expect(LeagueRulebookService).toHaveBeenCalled();
    expect(mockServiceInstance.getRulebookData).toHaveBeenCalledWith(leagueId);
    expect(RulebookViewDataBuilder.build).toHaveBeenCalledWith(apiDto);
  });

  it('should return mapped presentation error when service fails', async () => {
    const leagueId = 'league-123';
    const serviceError = { type: 'notFound' };
    const presentationError = 'notFound';

    mockServiceInstance.getRulebookData.mockResolvedValue(Result.err(serviceError));
    (mapToPresentationError as any).mockReturnValue(presentationError);

    const result = await query.execute(leagueId);

    expect(result.isErr()).toBe(true);
    expect(result.getError()).toBe(presentationError);
    expect(mapToPresentationError).toHaveBeenCalledWith(serviceError);
  });

  it('should provide a static execute method', async () => {
    const leagueId = 'league-123';
    const apiDto = { rulebook: 'rules' };
    const viewData = { rulebook: 'rules' };

    mockServiceInstance.getRulebookData.mockResolvedValue(Result.ok(apiDto));
    (RulebookViewDataBuilder.build as any).mockReturnValue(viewData);

    const result = await LeagueRulebookPageQuery.execute(leagueId);

    expect(result.isOk()).toBe(true);
    expect(result.unwrap()).toEqual(viewData);
  });
});