import { describe, it, expect } from 'vitest';
import { CreateLeagueViewModel } from './CreateLeagueViewModel';
import type { CreateLeagueViewData } from '../view-data/CreateLeagueViewData';

const createViewData = (overrides: Partial<CreateLeagueViewData> = {}): CreateLeagueViewData => ({
  leagueId: 'league-1',
  success: true,
  ...overrides,
} as CreateLeagueViewData);

describe('CreateLeagueViewModel', () => {
  describe('constructor', () => {
    it('should create instance with success flag', () => {
      const viewData: CreateLeagueViewData = {
        leagueId: 'league-123',
        success: true,
        successMessage: 'League created successfully!',
      };

      const viewModel = new CreateLeagueViewModel(viewData);

      expect(viewModel.success).toBe(true);
    });

    it('should create instance with leagueId', () => {
      const viewData: CreateLeagueViewData = {
        leagueId: 'league-123',
        success: true,
        successMessage: 'League created successfully!',
      };

      const viewModel = new CreateLeagueViewModel(viewData);

      expect(viewModel.leagueId).toBe('league-123');
    });

    it('should create instance with all fields', () => {
      const viewData: CreateLeagueViewData = {
        leagueId: 'test-league',
        success: false,
        successMessage: 'Failed to create league.',
      };

      const viewModel = new CreateLeagueViewModel(viewData);

      expect(viewModel.leagueId).toBe('test-league');
      expect(viewModel.success).toBe(false);
    });
  });

  describe('UI-specific getters', () => {
    it('should expose isSuccessful as true when success is true', () => {
      const viewData: CreateLeagueViewData = {
        leagueId: 'league-123',
        success: true,
        successMessage: 'League created successfully!',
      };

      const viewModel = new CreateLeagueViewModel(viewData);

      expect(viewModel.isSuccessful).toBe(true);
    });

    it('should expose isSuccessful as false when success is false', () => {
      const viewData: CreateLeagueViewData = {
        leagueId: 'league-123',
        success: false,
        successMessage: 'Failed to create league.',
      };

      const viewModel = new CreateLeagueViewModel(viewData);

      expect(viewModel.isSuccessful).toBe(false);
    });
  });

  describe('Display Object composition', () => {
    it('should derive successMessage from success', () => {
      const viewData: CreateLeagueViewData = {
        leagueId: 'league-123',
        success: true,
        successMessage: 'League created successfully!',
      };

      const viewModel = new CreateLeagueViewModel(viewData);

      expect(viewModel.successMessage).toBe('League created successfully!');
    });

    it('should derive successMessage from failure', () => {
      const viewData: CreateLeagueViewData = {
        leagueId: 'league-123',
        success: false,
        successMessage: 'Failed to create league.',
      };

      const viewModel = new CreateLeagueViewModel(viewData);

      expect(viewModel.successMessage).toBe('Failed to create league.');
    });
  });
});