import { readFileSync } from 'node:fs';
import { fileURLToPath } from 'node:url';
import * as XLSX from 'xlsx';
import * as THREE from 'three';
import { describe, expect, it } from 'vitest';
import { buildAbut } from '../src/core/abut/geometry';
import { parseAbutments, toAbutInput } from '../src/core/abut/parse';
import { buildMembers } from '../src/core/abut/members';
import { abutFootingGeom, abutFootingRebar } from '../src/core/abut/rebar/footing';
import { skewAngle } from '../src/core/abut/rebar/skew-layout';
import { abutSkewK } from '../src/view/abut-scene';
import { buildAbutFootingRebar3D } from '../src/view/abut-rebar3d';

// 예제 A1 (교대확대기초철근.md §13).
const RAG = fileURLToPath(new URL('../../../RAG/운곡교P1입력.xlsx', import.meta.url));
const rec = parseAbutments(XLSX.read(readFileSync(RAG), { type: 'buffer' })).abutments[0];
const model = buildAbut(toAbutInput(rec));
const members = buildMembers(model, { bottomEl: rec.foundationBottomEl, pileLengthMm: rec.pileLengthMm });
const geom = abutFootingGeom(model.length, members.shape, skewAngle(rec.skewDeg));
const k = abutSkewK(model);
const back = members.shape.footingBackM;
const bottom = members.footingBottomEl!;
const build = (dir: 'skew' | 'perp') => {
  const r = abutFootingRebar(geom, { dir });
  return { r, scene: buildAbutFootingRebar3D(geom, r, k, back, bottom) };
};
// Segments per bar: ⊓ / ⊔ have 3, the others 1.
const PIECES: Record<string, number> = { B1: 3, B2: 3, B5: 3, B6: 3 };

describe('교대 저판 3D 철근 (③, 2026-11-04)', () => {
  for (const dir of ['skew', 'perp'] as const) {
    it(`draws every 철근표 bar with its count (${dir})`, () => {
      const { r, scene } = build(dir);
      for (const b of r.bars) expect(scene.byName.get(b.mark)?.length, b.mark).toBe(b.count * (PIECES[b.mark] ?? 1));
    });

    it(`keeps every bar inside the 저판 (${dir})`, () => {
      const { scene } = build(dir);
      const top = bottom + geom.H / 1000;
      const front = back + geom.W / 1000;
      const box = new THREE.Box3();
      for (const mesh of scene.group.children as THREE.Mesh[]) {
        mesh.geometry.computeBoundingBox();
        box.copy(mesh.geometry.boundingBox!);
        const tMid = (box.min.z + box.max.z) / 2;
        const s0 = k * tMid;
        expect(box.min.y).toBeGreaterThan(bottom);
        expect(box.max.y).toBeLessThan(top);
        expect(box.min.z).toBeGreaterThan(back);
        expect(box.max.z).toBeLessThan(front);
        // Along the axis, within the skew ends at that t (a bar diameter of slack for the cylinder's sides).
        expect(box.min.x).toBeGreaterThan(s0 + Math.min(0, k * (box.min.z - tMid), k * (box.max.z - tMid)) - 0.03);
        expect(box.max.x).toBeLessThan(s0 + geom.L / 1000 + Math.max(0, k * (box.min.z - tMid), k * (box.max.z - tMid)) + 0.03);
      }
    });
  }

  it('dims or hides the bars not selected (선택만 보기)', () => {
    const { scene } = build('skew');
    scene.show(new Set(['B9']), true);
    expect(scene.byName.get('B9')!.every((m) => m.visible)).toBe(true);
    expect(scene.byName.get('B1')!.some((m) => m.visible)).toBe(false);
    scene.show(null, false);
    expect(scene.byName.get('B1')!.every((m) => m.visible)).toBe(true);
  });
});