/* 186-1 묻힌 관 유출 벽 설계선 접힘 헬퍼 — 화면 TS 를 그 자리에서 트랜스파일해 Node 로 돌림.
 * 입력 = 검증_랩탑메인 No.14+12.22 사본(`fixtures/b06_186_1_pipe_292.json`) · 73-4 픽스처 관 340(절토 쪽 유출).
 * 결과 = 표준출력 JSON 한 벌. 짝 = `test_186_1_outlet_fold.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) — 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 } = loadTs(B06("logic/B06_Section_Structure_Layouts.ts"));
const { computeCulvertLayout } = loadTs(B06("logic/B06_Section_Cross_Culvert_Geom.ts"));
const read = (name) =>
  JSON.parse(fs.readFileSync(path.join(__dirname, "fixtures", name), "utf8")).cross_sections;
const clone = (v) => JSON.parse(JSON.stringify(v));
const r2 = (v) => Math.round(v * 100) / 100;

/** 유출 쪽 설계선(트림 사면) 점열 · 유출 벽 · 면적 행. */
function study(sections, target) {
  const section = sections.find((s) => Math.abs(s.chainage_m - target) < 0.01);
  const { culvert } = computeStoredLayouts(section, sections);
  const wall = culvert.walls.find((w) => w.role === "outlet");
  const trim = culvert.designTrim;
  const slope = (wall.outward > 0 ? trim.maxSlope : trim.minSlope).points;
  const row = structureAreaRows(sections).find((r) => Math.abs(r.chainage_m - target) < 0.01);
  return {
    outward: wall.outward,
    wallTop: r2(wall.topJoint.elevation),
    groundAtWall: r2(groundOf(section, wall.topJoint.offset)),
    offsets: slope.map((p) => r2(p.offset)),
    elevations: slope.map((p) => r2(p.elevation)),
    cut: row ? row.cut_area_m2 : null,
    fill: row ? row.fill_area_m2 : null,
  };
}
function groundOf(section, offset) {
  const s = section.samples;
  for (let i = 1; i < s.length; i += 1)
    if (s[i].offset_m >= offset) {
      const t = (offset - s[i - 1].offset_m) / (s[i].offset_m - s[i - 1].offset_m);
      return s[i - 1].elevation_m + (s[i].elevation_m - s[i - 1].elevation_m) * t;
    }
  return NaN;
}

const out = {};
// ① 저장값 그대로(유출 d 9.0) · ② 자동 자리(조작값 없음)
const stored = read("b06_186_1_pipe_292.json");
out.stored = study(stored, 292.22);
const auto = clone(stored);
auto[0].design.revet_adjust = null;
out.auto = study(auto, 292.22);
// ③ 91-4 절토 쪽 배관 유출(73-4 픽스처 관 340 · 유출 = 우측 절토)
const base = read("b06_73_4_body_guard_sections.json");
const s340 = clone(base.find((s) => Math.abs(s.chainage_m - 340) < 0.6));
s340.uphill_side = "left";
s340.culvert = {
  type: "pipe",
  chainage_m: 340,
  pipe_kind: "흄관",
  diameter_m: 1.0,
  min_cover_m: 0.5,
  inlet: { role: "inlet", structure: "기슭막이", revet_form: "돌쌓기(찰)" },
  outlet: { role: "outlet", structure: "기슭막이", revet_form: "돌쌓기(찰)" },
};
s340.design.inlet_structure = "revet";
const layout = computeCulvertLayout(s340, s340.samples, undefined, "revet");
const wall340 = layout.walls.find((w) => w.role === "outlet");
const slope340 = (wall340.outward > 0 ? layout.designTrim.maxSlope : layout.designTrim.minSlope)
  .points;
out.cut340 = {
  outward: wall340.outward,
  offsets: slope340.map((p) => r2(p.offset)),
  elevations: slope340.map((p) => r2(p.elevation)),
};
process.stdout.write(JSON.stringify(out));