import { describe, expect, it } from 'vitest';
import { developmentLength, hookLength, NOMINAL_DIAMETER, spliceLength } from '../src/core/rebar/common';
import { bottomPiece, topBarLength, topRowEl, widthLayout } from '../src/core/rebar/coping-main';

describe('C1–C8 상·하면 주철근 (코핑철근.md §5, plan C3)', () => {
  it('nominal diameters: H29 28.6, S32 31.8 (documents use these, not the round numbers)', () => {
    expect(NOMINAL_DIAMETER.H29).toBe(28.6);
    expect(NOMINAL_DIAMETER.S32).toBe(31.8);
  });

  it('width layout for B 3100: edge 127, ends 110.5, 21@125, 24 bars (12 + 12)', () => {
    const w = widthLayout(3100);
    expect(w.yE).toBe(127);
    expect(w.S).toBe(2846);
    expect(w.n).toBe(21);
    expect(w.g).toBe(110.5);
    expect(w.count).toBe(24);
    expect(w.cyclePerKind).toBe(12);
    expect(w.text).toBe('127 · 110.5 · 21@125 · 110.5 · 127');
  });

  it('heights: 43.284 / 43.227 / 43.170 for the three top rows', () => {
    expect(topRowEl(43.284, 1)).toBe(43.284);
    expect(topRowEl(43.284, 2)).toBe(43.227);
    expect(topRowEl(43.284, 3)).toBe(43.17);
  });

  it('top bar lengths 12744 / 12629.6 / 12515.2 (path + 2 × 472 hook)', () => {
    expect(topBarLength(12000, 1)).toBeCloseTo(12744, 0);
    expect(topBarLength(12000, 2)).toBeCloseTo(12629.6, 0);
    expect(topBarLength(12000, 3)).toBeCloseTo(12515.2, 0);
  });

  it('bottom piece ≈ 7448 with l_s = 1717.6 (1.3 × l_d of H29 at fck 27) — the document shows 1717', () => {
    const b = bottomPiece();
    expect(b.path).toBeCloseTo(12235.6, 6);
    expect(b.ls).toBeCloseTo(1717.6, 0);
    expect(b.piece).toBeCloseTo(7448, 0);
  });

  it('hook 472 (16.5 × 28.6) and splice from the same formula as C1', () => {
    expect(hookLength('main90', NOMINAL_DIAMETER.H29)).toBeCloseTo(472, 0);
    expect(spliceLength(NOMINAL_DIAMETER.H29, 400, 27)).toBeCloseTo(1.3 * developmentLength(NOMINAL_DIAMETER.H29, 400, 27), 9);
  });
});