/* 73-4 세월교 · 박스 흙막이 횡단 기하 헬퍼 — 화면 TS(`B06_Section_Structure_Layouts` · `_Cross_Body_Guard`)를
 * 그 자리에서 트랜스파일해 Node 로 돌림. 입력 = 픽스처(검증_sub7 상세 일부) · 결과 = 표준출력 JSON 한 벌.
 * 짝 = `test_73_4_body_guard.py`.
 */
const fs = require("fs");
const path = require("path");
const { makeLoader } = require("./helper_ts_stub_loader.cjs");

const ROOT = path.join(__dirname, "..", "..");
// 화면 전용 모듈(토스트 · 글) — 기하 계산엔 안 쓰임
const STUBS = {
  "@ui/ui_template_toast": { showToast: () => undefined },
};

const { loadTs } = makeLoader({
  root: ROOT,
  interop: true,
  requireFor: (full) => (request) => {
    if (STUBS[request]) return STUBS[request];
    const alias = { "@util/": "common_util", "@ui/": "ui_template", "@config/": "config" };
    for (const [prefix, dir] of Object.entries(alias))
      if (request.startsWith(prefix))
        return loadTs(resolve(path.join(ROOT, dir, request.slice(prefix.length))));
    return loadTs(resolve(path.join(path.dirname(full), request)));
  },
});
const resolve = (base) =>
  [base, `${base}.ts`, path.join(base, "index.ts")].find(
    (p) => fs.existsSync(p) && fs.statSync(p).isFile(),
  ) ?? `${base}.ts`;

const B06 = (f) => path.join(ROOT, "B06_Section", f);
const { computeStoredLayouts, structureAreaRows, trimOfLayouts } = loadTs(
  B06("logic/B06_Section_Structure_Layouts.ts"),
);
const { bodyGuardBase } = loadTs(B06("logic/B06_Section_Cross_Body_Guard.ts"));

const fixture = JSON.parse(
  fs.readFileSync(path.join(__dirname, "fixtures", "b06_73_4_body_guard_sections.json"), "utf8"),
);
const sections = fixture.cross_sections;
const at = (c) => sections.find((s) => Math.abs(s.chainage_m - c) < 0.6);
const round = (v) => Math.round(v * 1000) / 1000;

/** 벽마다 배면 ↔ 본체 끝 자리 차이(m) · 벽 윗면 ↔ 본체 윗면 표고 차이(79-7 — 벽 배면이 본체 끝에 붙음). */
function fronts(section) {
  const layouts = computeStoredLayouts(section, sections);
  const base = bodyGuardBase(section, section.samples);
  const walls = layouts.culvert?.walls ?? [];
  return {
    walls: walls.map((w) => {
      const end = base.ends[w.role];
      return {
        role: w.role,
        form: w.form,
        dOffset: round(w.bottomBack.offset - end.offset),
        dElevation: round(Math.max(...w.points.map((p) => p.elevation)) - end.top),
        front: round(w.bottomBack.offset),
      };
    }),
    bodyX: layouts.culvert?.bodyX ?? null,
    applied: layouts.culvert?.revetShift
      ? { inlet: layouts.culvert.revetShift.inlet.x, outlet: layouts.culvert.revetShift.outlet.x }
      : null,
    trimSame:
      JSON.stringify(trimOfLayouts(layouts)) === JSON.stringify(layouts.culvert?.designTrim),
    pipeLength: null,
  };
}

const out = {};
const box = at(352.14);
const ford = at(173.09);
out.box = fronts(box);
out.ford = fronts(ford);

// 박스를 좌우로 1 m 늘리면 벽 전면도 1 m 따라 나감(연동 = 본체 기준 자리)
const moved = JSON.parse(JSON.stringify(box));
moved.design.box_adjust = { left: { lengthM: 1, riseM: 0 }, right: { lengthM: 1, riseM: 0 } };
const swapped = sections.map((s) => (s === box ? moved : s));
const movedLayouts = computeStoredLayouts(moved, swapped);
const base = bodyGuardBase(moved, moved.samples);
out.boxMoved = movedLayouts.culvert.walls.map((w) => ({
  role: w.role,
  dOffset: round(w.bottomBack.offset - base.ends[w.role].offset),
  front: round(w.bottomBack.offset),
}));

// 연동 옆 측점(340 · 360) — 소유 측점 벽이 섬
out.linked = [340, 360].map((c) => {
  const s = at(c);
  return { chainage: c, walls: computeStoredLayouts(s, sections)?.culvert?.walls.length ?? 0 };
});

// 면적 행 — 서버 Node 진입점과 같은 함수(`structureAreaRows`)
out.areas = structureAreaRows(sections).filter((r) =>
  [173.087, 352.14].some((c) => Math.abs(r.chainage_m - c) < 0.6),
);
process.stdout.write(JSON.stringify(out));