import { describe, it, expect } from 'vitest';
import { HomeViewDataBuilder } from './HomeViewDataBuilder';
import type { DashboardOverviewDTO } from '@/lib/types/generated/DashboardOverviewDTO';

describe('HomeViewDataBuilder', () => {
  describe('happy paths', () => {
    it('should transform DashboardOverviewDTO to HomeViewData correctly', () => {
      const homeDataDto: DashboardOverviewDTO = {
        currentDriver: null,
        upcomingRaces: [
          {
            id: 'race-1',
            track: 'Test Track',
            car: 'Test Car',
            scheduledAt: '2024-01-01T10:00:00Z',
            isMyLeague: false,
          },
        ],
        leagueStandingsSummaries: [
          {
            leagueId: 'league-1',
            leagueName: 'Test League',
            position: 1,
            points: 100,
            totalDrivers: 20,
          },
        ],
        feedSummary: { items: [] },
        friends: [],
        activeLeaguesCount: 1,
      };

      const result = HomeViewDataBuilder.build(homeDataDto);

      expect(result).toEqual({
        isAlpha: true,
        upcomingRaces: [
          {
            id: 'race-1',
            track: 'Test Track',
            car: 'Test Car',
            formattedDate: 'Mon, Jan 1, 2024',
          },
        ],
        topLeagues: [
          {
            id: 'league-1',
            name: 'Test League',
            description: '',
          },
        ],
        teams: [],
      });
    });

    it('should handle empty arrays correctly', () => {
      const homeDataDto: DashboardOverviewDTO = {
        currentDriver: null,
        upcomingRaces: [],
        leagueStandingsSummaries: [],
        feedSummary: { items: [] },
        friends: [],
        activeLeaguesCount: 0,
      };

      const result = HomeViewDataBuilder.build(homeDataDto);

      expect(result).toEqual({
        isAlpha: true,
        upcomingRaces: [],
        topLeagues: [],
        teams: [],
      });
    });
  });

  describe('data transformation', () => {
    it('should not modify the input DTO', () => {
      const homeDataDto: DashboardOverviewDTO = {
        currentDriver: null,
        upcomingRaces: [{ id: 'race-1', track: 'Track', car: 'Car', scheduledAt: '2024-01-01T10:00:00Z', isMyLeague: false }],
        leagueStandingsSummaries: [{ leagueId: 'league-1', leagueName: 'League', position: 1, points: 10, totalDrivers: 10 }],
        feedSummary: { items: [] },
        friends: [],
        activeLeaguesCount: 1,
      };

      const originalDto = JSON.parse(JSON.stringify(homeDataDto));
      HomeViewDataBuilder.build(homeDataDto);

      expect(homeDataDto).toEqual(originalDto);
    });
  });
});