import { describe, expect, it } from 'vitest';
import * as THREE from 'three';
import { buildPier } from '../src/core/geometry';
import { solplateGeometry } from '../src/core/solplate';
import { buildPierScene } from '../src/view/scene';
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 FRONT = { 1: 3, 2: 3, 3: 3, 4: 3, 5: 3 };

describe('솔플레이트 모델과 3D (결정 2026-11-06, Q-SH1–9)', () => {
  it('every bearing: h3 181, L 800 × W 740 (A 700 × B 640 + 100), T 30, T1 38 / T2 22', () => {
    const m = buildPier(loadP1(), P1CTX);
    expect(m.blocks.every((b) => b.plan.h3 === 181 && b.plan.L === 800 && b.plan.W === 740 && b.plan.T === 30 && b.plan.T1 === 38 && b.plan.T2 === 22)).toBe(true);
  });

  it('S 3 % typed on the front row → T 34, T1 46 / T2 22, and the front blocks drop 4 mm (girder underside kept)', () => {
    const base = buildPier(loadP1(), P1CTX);
    const m = buildPier({ ...loadP1(), sole: { slopePct: FRONT } }, P1CTX);
    const b1 = m.blocks.find((b) => b.no === 1)!, b0 = base.blocks.find((b) => b.no === 1)!;
    expect(b1.plan).toMatchObject({ T: 34, T1: 46, T2: 22 });
    expect(b1.top).toBeCloseTo(b0.top - 0.004, 9);
    expect(b1.padTop + (b1.plan.h3 + b1.plan.T) / 1000).toBeCloseTo(b0.padTop + (b0.plan.h3 + b0.plan.T) / 1000, 9);
    expect(m.soles.find((s) => s.no === 1)!.slopeSource).toBe('수정됨');
    // The back row keeps its own T (30): one T per row (Q-SH9).
    expect(m.blocks.find((b) => b.no === 6)!.plan.T).toBe(30);
  });

  it('WS02: T typed 30 at S 3 % leaves T2 18 < 22', () => {
    const m = buildPier({ ...loadP1(), sole: { slopePct: FRONT, tByRow: { 전열: 30 } } }, P1CTX);
    const s = m.soles.find((x) => x.no === 1)!;
    expect(s).toMatchObject({ T: 30, tTyped: true, T2: 18 });
    expect(s.warnings).toContain('WS02');
  });

  it('without a pair or 종단경사 the slope is 0 (WS03): T 22, the block rises 8 mm', () => {
    const alone = buildPier(loadP1());
    expect(alone.soles.every((s) => s.slopePct === 0 && s.warnings.includes('WS03') && s.T === 22)).toBe(true);
    const withSlope = buildPier({ ...loadP1(), longitudinalSlope: -0.0191 });
    expect(withSlope.soles.every((s) => s.slopeSource === '입력' && Math.abs(s.slopePct + 1.91) < 1e-9 && s.T === 30)).toBe(true);
  });

  it('T1 sits on the 오르막 쪽: the thick end of P1 ① points towards A1 (the higher girder end)', () => {
    const m = buildPier(loadP1(), P1CTX);
    const b = m.blocks.find((x) => x.no === 1)!;
    const g = solplateGeometry(b, b.plan);
    // Top corners: index (ai·2 + ci)·2 + 1; the thick end has the larger top.
    const tops = [0, 1, 2, 3].map((q) => g.corners[q * 2 + 1]);
    const thick = tops.filter((p) => p[1] - g.bottom > (g.T1 + g.T2) / 2), thin = tops.filter((p) => p[1] - g.bottom < (g.T1 + g.T2) / 2);
    const mid = (ps: number[][]) => [0, 2].map((i) => ps.reduce((s, p) => s + p[i], 0) / ps.length);
    const [ds, dn] = [mid(thick)[0] - mid(thin)[0], mid(thick)[1] - mid(thin)[1]];
    const toThick = { e: ds * m.u.e + dn * m.nrm.e, n: ds * m.u.n + dn * m.nrm.n };
    const p1 = loadP1().bearings[0];
    const pair = P1CTX.pairs.find((p) => p.to.no === 1)!;
    // A1 lies against the azimuth direction from P1 (pairs look ahead from A1 to P1).
    const az = (p1.azimuthDeg * Math.PI) / 180;
    expect(pair.uphill).toBe('A1');
    expect(toThick.e * -Math.sin(az) + toThick.n * -Math.cos(az)).toBeGreaterThan(0);
  });

  it('the 3D scene has one solplate wedge per bearing, and its highest point is the thick end of the tallest one', () => {
    const m = buildPier(loadP1(), P1CTX);
    const scene = buildPierScene(m);
    const wedges = scene.parts.solplates.children;
    expect(wedges.length).toBe(10);
    const box = new THREE.Box3().setFromObject(scene.parts.solplates);
    const top = Math.max(...m.blocks.map((b) => solplateGeometry(b, b.plan).bottom + solplateGeometry(b, b.plan).T1));
    expect(box.max.y).toBeCloseTo(top, 3);
  });

  it('the 교량받침 본체 is one box per bearing, height h3 (181 mm)', () => {
    const scene = buildPierScene(buildPier(loadP1(), P1CTX));
    const bodies = scene.parts.bearings.children;
    expect(bodies.length).toBe(10);
    const one = new THREE.Box3().setFromObject(bodies[0]);
    expect(one.max.y - one.min.y).toBeCloseTo(0.181, 3);
  });
});