import { describe, expect, it } from 'vitest';
import { copyCandidates, copyItemsFor, copyItemsWithOverrides, selectedTargets, type CopyCandidate } from '../src/core/copy-targets';
import { loadP1 } from './helpers';

const piers: CopyCandidate[] = [
  { name: 'P1', type: 'T형', hasModel: true },
  { name: 'P2', type: 'T형', hasModel: true },
  { name: 'P3', type: 'T형', hasModel: true },
  { name: 'P4', type: 'Y형', hasModel: true },
  { name: 'P5', type: 'T형', hasModel: false },
];

describe('copyCandidates (대상 후보)', () => {
  it('excludes the source pier', () => {
    expect(copyCandidates(piers, 'P3', false).map((c) => c.name)).not.toContain('P3');
  });

  it('keeps only the source type when 같은 형식만 is on', () => {
    expect(copyCandidates(piers, 'P3', true).map((c) => c.name)).toEqual(['P1', 'P2', 'P5']);
  });

  it('marks a pier without a model as not selectable', () => {
    const p5 = copyCandidates(piers, 'P3', false).find((c) => c.name === 'P5');
    expect(p5?.selectable).toBe(false);
  });
});

describe('selectedTargets (선택한 대상만)', () => {
  it('is empty when nothing is ticked', () => {
    expect(selectedTargets(piers, 'P3', false, new Set())).toEqual([]);
  });

  it('returns only ticked, selectable piers', () => {
    const picked = new Set(['P1', 'P4', 'P5']);
    expect(selectedTargets(piers, 'P3', false, picked)).toEqual(['P1', 'P4']);
  });

  it('ignores a tick on a pier hidden by the same-type filter', () => {
    const picked = new Set(['P4']);
    expect(selectedTargets(piers, 'P3', true, picked)).toEqual([]);
  });
});

describe('copyItemsFor (부재 선택에 해당하는 복사 항목)', () => {
  it('coping copies only the coping items', () => {
    expect(copyItemsFor('coping')).toEqual(['coping-width', 'coping-length', 'coping-h1', 'coping-h2', 'level-width']);
  });

  it('확대기초 · 말뚝 copies only the pile items', () => {
    expect(copyItemsFor('footing')).toEqual(['pile-length', 'pile-rows']);
  });

  it('지반 copies only the ground position', () => {
    expect(copyItemsFor('ground')).toEqual(['ground-position']);
  });

  it('기둥 and 받침 have no copy items yet', () => {
    expect(copyItemsFor('column')).toEqual([]);
    expect(copyItemsFor('bearing')).toEqual([]);
  });

  it('every copy item belongs to exactly one member', () => {
    const all = (['bearing', 'coping', 'column', 'footing', 'ground'] as const).flatMap((m) => copyItemsFor(m));
    expect([...all].sort()).toEqual(['coping-h1', 'coping-h2', 'coping-length', 'coping-width', 'ground-position', 'level-width', 'pile-length', 'pile-rows']);
  });
});

describe('copyItemsWithOverrides (기준 교각에서 되돌리기가 표시된 항목)', () => {
  const base = loadP1();
  const source = (draft: Partial<typeof base>) => ({ defaults: base, input: base, draft: { ...base, ...draft } });

  it('is empty when the 기준 pier has no changed values', () => {
    expect(copyItemsWithOverrides(source({}))).toEqual([]);
  });

  it('selects the item of a changed coping length', () => {
    expect(copyItemsWithOverrides(source({ copingLengthMm: base.copingLengthMm + 500 }))).toEqual(['coping-length']);
  });

  it('selects the pile item when the pile length changed', () => {
    expect(copyItemsWithOverrides(source({ pileLengthMm: base.pileLengthMm + 100 }))).toEqual(['pile-length']);
  });

  it('selects the coping h1, h2 and Level 폭 items when those values changed', () => {
    expect(copyItemsWithOverrides(source({ copingH1Mm: base.copingH1Mm + 1, levelWidthMm: base.levelWidthMm + 1 }))).toEqual(['coping-h1', 'level-width']);
  });

  it('ignores a changed value that no copy item carries (groundEl)', () => {
    expect(copyItemsWithOverrides(source({ groundEl: base.groundEl + 0.5 }))).toEqual([]);
  });
});