import { describe, expect, it } from 'vitest';
import { buildPier } from '../src/core/geometry';
import { elevationRows, pairCopingSpans, solplateRows } from '../src/core/bearing-table';
import { loadP1, p1Pairs } from './helpers';

// Bridge context (A1 ↔ P1 girder pairs) as in the app, so the solplate slope is computed (2026-11-06).
const P1CTX = { pairs: p1Pairs() };

const model = buildPier(loadP1(), P1CTX);
const integrated = buildPier({ ...loadP1(), bearingLayout: '일체' }, P1CTX);

describe('교량받침 ELEVATION TABLE (모델값, 2026-11-03)', () => {
  const rows = elevationRows(model);

  it('one row per bearing; EL.X is the Excel z (mortar top)', () => {
    expect(rows.length).toBe(10);
    expect(rows[0].elx).toBeCloseTo(43.561, 3);
    expect(rows[5].elx).toBeCloseTo(43.611, 3);
  });

  it('front block 100 mm, back block 150 mm; mortar 50; bearing 181; solplate 30 (T = T_ref → no drop); E = sum', () => {
    expect(rows[0]).toMatchObject({ h1: 100, h2: 50, h3: 181, h4: 30, E: 361 });
    expect(rows[5]).toMatchObject({ h1: 150, h2: 50, h3: 181, h4: 30, E: 411 });
  });

  it('C1 is 600 for a 분리 bearing; C6 is the 1200 block depth; C4 and C5 are 600 each', () => {
    expect(rows.every((r) => r.C1 === 600)).toBe(true);
    expect(rows.every((r) => r.C6 === 1200)).toBe(true);
    expect(rows[0]).toMatchObject({ C4: 600, C5: 600 });
  });

  it('C2 and C3 sit on the front row only: C2 is the bearing distance along 교축, C3 = C2 + 1200', () => {
    expect(rows[0].C2).toBeGreaterThan(1000);
    expect(rows[0].C3).toBe(rows[0].C2! + 1200);
    expect(rows[5].C2).toBeNull();
    expect(rows[5].C3).toBeNull();
  });

  it('S1 and S2 come from the block rebar: 8 bars of 2500 each on a 분리 block', () => {
    expect(rows[0].S1).toEqual({ count: 8, length: 2500 });
    expect(rows[0].S2).toEqual({ count: 8, length: 2500 });
  });

  it('일체: the pair block gives C3 = 2500 on the front row and the bars on the front row only', () => {
    const ir = elevationRows(integrated);
    expect(ir[0].C3).toBe(2500);
    expect(ir[5].S1).toBeNull();
    expect(ir[0].S1).not.toBeNull();
  });
});

describe('솔플레이트 TABLE (모델값, 2026-11-03)', () => {
  it('10 rows: S from the A1 pair (−1.908 %), L 800, W 740, T 30, T1 38, T2 22; W08 holds within 1 mm (2026-11-06)', () => {
    const rows = solplateRows(model);
    expect(rows.length).toBe(10);
    expect(rows[0]).toMatchObject({ L: 800, W: 740, T: 30, T1: 38, T2: 22, ok: true, pair: 'A1-①', source: '계산' });
    expect(rows[0].S).toBeCloseTo(-1.908, 3);
    expect(rows[0].checkLhs).toBe(16);
    expect(rows[0].checkRhs).toBeCloseTo(15.265, 2);
    // 후열 ⑥: no pair (P2 not loaded) → the front twin ① value, 가정 + WS03.
    expect(rows[5]).toMatchObject({ source: '가정', pair: undefined, T: 30 });
    expect(rows[5].warnings).toContain('WS03');
  });
});

describe('S1·S2 코핑 치수 (2026-11-03)', () => {
  it('S1 + S2 + S1 = the coping width B (3100); S1 is bearing centre to the coping edge', () => {
    const s = pairCopingSpans(model, 0)!;
    expect(s.copingWidth).toBe(3100);
    expect(s.S1Low + s.S2 + s.S1High).toBe(3100);
    // Pair 1 · 6 (P1): the 후열 sits at n −0.600 (low side), the 전열 at n +0.698 (high side). S1 low 950 (후열), S2 1298, S1 high 852 (전열).
    expect(s.S1Low).toBe(950);
    expect(s.S2).toBe(1298);
    expect(s.S1High).toBe(852);
  });

  it('an unknown pair gives null', () => {
    expect(pairCopingSpans(model, 99)).toBeNull();
  });
});