import { describe, expect, it } from 'vitest';
import { applyOverrides, overrideTargets, shownNames, type PierSelection } from '../src/core/active-piers';
import { loadP1 } from './helpers';

const list: PierSelection[] = [
  { name: 'P1', checked: true, hasModel: true },
  { name: 'P2', checked: true, hasModel: true },
  { name: 'P3', checked: false, hasModel: true },
  { name: 'P4', checked: true, hasModel: false },
];

describe('shownNames (체크 = 활성, 기준 교각은 항상 표시)', () => {
  it('shows every checked pier that has a model, in list order', () => {
    expect(shownNames(list, 'P1')).toEqual(['P1', 'P2']);
  });

  it('keeps the 기준 pier even when it is unchecked', () => {
    expect(shownNames(list, 'P3')).toEqual(['P1', 'P2', 'P3']);
  });

  it('never shows a pier without a model', () => {
    expect(shownNames(list, 'P4')).toEqual(['P1', 'P2']);
  });

  it('shows only the 기준 pier when nothing else is checked', () => {
    const none = list.map((p) => ({ ...p, checked: false }));
    expect(shownNames(none, 'P2')).toEqual(['P2']);
  });
});

describe('overrideTargets (기준 교각의 수정 값을 받을 교각)', () => {
  it('is the checked piers other than the 기준 pier', () => {
    expect(overrideTargets(list, 'P1')).toEqual(['P2']);
    expect(overrideTargets(list, 'P3')).toEqual(['P1', 'P2']);
  });
});

describe('applyOverrides (기준 교각의 변경 항목만 옮김)', () => {
  const base = loadP1();
  const defaults = base;
  const edited = { ...base, copingWidthMm: base.copingWidthMm + 100 };
  const target = { ...base, copingLengthMm: base.copingLengthMm + 500 };

  it('copies only the keys the 기준 pier overrides, keeping the target own values', () => {
    const next = applyOverrides({ defaults, input: defaults, draft: edited }, target);
    expect(next.copingWidthMm).toBe(edited.copingWidthMm);
    expect(next.copingLengthMm).toBe(target.copingLengthMm);
  });

  it('returns the target unchanged when the 기준 pier has no overrides', () => {
    const next = applyOverrides({ defaults, input: defaults, draft: defaults }, target);
    expect(next).toEqual(target);
  });
});