import { describe, it, expect } from 'vitest';
import { ReapproCalculator } from '@domain/services/ReapproCalculator';

describe('ReapproCalculator', () => {
  const calc = new ReapproCalculator();

  it('empty target returns empty', () => {
    const r = calc.compute({ target: '', qty: 1, repro: {}, inverted: {} });
    expect(r.steps).toHaveLength(0);
    expect(r.gen1Needs).toHaveLength(0);
  });

  it('unknown target returns empty', () => {
    const r = calc.compute({ target: 'Unknown', qty: 1, repro: {}, inverted: {} });
    expect(r.steps).toHaveLength(0);
  });

  it('gen2 race needs 2 gen1 parents', () => {
    const r = calc.compute({ target: 'Dorée et Rousse', qty: 4, repro: {}, inverted: {} });
    expect(r.steps).toHaveLength(1);
    expect(r.steps[0]!.parentA).toBe('Rousse');
    expect(r.steps[0]!.parentB).toBe('Dorée');
    expect(r.steps[0]!.couples).toBe(4);
    expect(r.gen1Needs).toHaveLength(2);
    expect(r.totalGen1).toBe(8); // 4 Rousse + 4 Dorée
  });

  it('gender inversion swaps parents', () => {
    const r = calc.compute({ target: 'Dorée et Rousse', qty: 4, repro: {}, inverted: { 'Dorée et Rousse': true } });
    expect(r.steps[0]!.parentA).toBe('Dorée');
    expect(r.steps[0]!.parentB).toBe('Rousse');
  });

  it('breeders reduce couple count', () => {
    const r = calc.compute({ target: 'Dorée et Rousse', qty: 4, repro: { 'Dorée et Rousse': 2 }, inverted: {} });
    expect(r.steps[0]!.couples).toBe(2);
  });

  it('gen1 needs include male/female split', () => {
    const r = calc.compute({ target: 'Dorée et Rousse', qty: 2, repro: {}, inverted: {} });
    const rousse = r.gen1Needs.find(n => n.name === 'Rousse');
    const doree = r.gen1Needs.find(n => n.name === 'Dorée');
    expect(rousse).toBeDefined();
    expect(doree).toBeDefined();
    // Default: parentA (Rousse) = male, parentB (Dorée) = female
    expect(rousse!.m).toBe(2);
    expect(doree!.f).toBe(2);
  });
});