import { describe, it, expect } from 'vitest';
import { groupDeckCards } from '../../lib/deck-detail-grouping.js';
import { getDeckFormatIcon } from '../../lib/deck-format-utils.js';

describe('getDeckFormatIcon', () => {
  it('returns emoji for known formats', () => {
    expect(getDeckFormatIcon('Commander')).toBe('⚔️');
    expect(getDeckFormatIcon('Standard')).toBe('🏆');
  });

  it('returns default for unknown format', () => {
    expect(getDeckFormatIcon('Pioneer')).toBe('🃏');
  });
});

describe('groupDeckCards', () => {
  const cards = [
    { name: 'Bolt', card_type: 'Instant', cmc: 1, colors: '["R"]', rarity: 'common', quantity: 4 },
    { name: 'Giant', card_type: 'Creature — Giant', cmc: 5, colors: '["R","G"]', rarity: 'rare', quantity: 1 },
  ];

  it('returns empty object when cards is undefined', () => {
    expect(groupDeckCards(undefined, 'type')).toEqual({});
  });

  it('groups by card type prefix', () => {
    const groups = groupDeckCards(cards, 'type');
    expect(groups.Instant).toHaveLength(1);
    expect(groups.Creature).toHaveLength(1);
  });

  it('groups by cmc', () => {
    const groups = groupDeckCards(cards, 'cmc');
    expect(groups['1 Mana']).toHaveLength(1);
    expect(groups['5 Mana']).toHaveLength(1);
  });
});