/* 91 원지반 · 암 제약 삭제 · 유출측 복합경사 헬퍼 — 화면 TS 를 그 자리에서 트랜스파일해 Node 로 돌림.
 * 입력 = 73-4 픽스처(세월교 173.09 · 박스 352.14 · 관 180) · 결과 = 표준출력 JSON 한 벌. 짝 = `test_91_ground_free.py`.
 */
const fs = require("fs");
const path = require("path");
const ts = require(path.join(__dirname, "..", "..", "config", "node_modules", "typescript"));

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

function loadTs(file) {
  const full = path.resolve(file);
  if (cache.has(full)) return cache.get(full);
  if (full.endsWith(".json")) {
    const data = JSON.parse(fs.readFileSync(full, "utf8"));
    cache.set(full, data);
    return data;
  }
  const js = ts.transpileModule(fs.readFileSync(full, "utf8"), {
    compilerOptions: {
      module: ts.ModuleKind.CommonJS,
      target: ts.ScriptTarget.ES2020,
      esModuleInterop: true,
    },
  }).outputText;
  const box = { exports: {} };
  cache.set(full, box.exports);
  const localRequire = (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)));
  };
  new Function("exports", "module", "require", js)(box.exports, box, localRequire);
  cache.set(full, box.exports);
  return box.exports;
}
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 } = loadTs(B06("B06_Section_Structure_Layouts.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 clone = (v) => JSON.parse(JSON.stringify(v));
const r3 = (v) => Math.round(v * 1000) / 1000;
const out = {};
/** 원지반 사본 — [from, to] 안 샘플을 dz 만큼 옮김. */
const shiftGround = (s, dz, from = -Infinity, to = Infinity) => {
  for (const p of s.samples)
    if (p.offset_m >= from && p.offset_m <= to && p.elevation_m != null) p.elevation_m += dz;
};
const layoutsOf = (s, base) =>
  computeStoredLayouts(
    s,
    sections.map((x) => (x === base ? s : x)),
  );

// ① 91-2 · 107-2 세월교 바닥 — 기본 · 손 값(측벽 높이)은 원지반을 바꿔도 그대로 · 흙막이 기본 높이도
const FORD = at(173.087);
function fordFloor(edit) {
  const s = clone(FORD);
  for (const role of ["inlet", "outlet"]) s.culvert[role].revet_height_m = null;
  edit(s);
  const { ford, culvert } = layoutsOf(s, FORD);
  return ford.sides.map((side) => {
    const wall = culvert.walls.find((w) => w.role === side.role);
    return {
      role: side.role,
      slabTop: r3(side.slabTopElevation),
      wallBottom: wall ? r3(Math.min(...wall.points.map((p) => p.elevation))) : null,
    };
  });
}
const hand = (s) => {
  s.design.ford_adjust = {
    inlet: { heightM: 2.0, lateralM: 0, slopeM: 0 },
    outlet: { heightM: 2.4, lateralM: 0, slopeM: 0 },
  };
};
out.fordAuto = fordFloor(() => undefined);
out.fordAutoBedDown = fordFloor((s) => shiftGround(s, -2, -2, 2));
out.fordHand = fordFloor(hand);
out.fordHandBedDown = fordFloor((s) => {
  hand(s);
  shiftGround(s, -2, -2, 2);
});
// ② 91-3 다단 자동 자리 — 관 180 유출 흙막이 + 2단 · 원지반을 옮겨도 단 자리 같음 · 사면 1.0 m
const { computeCulvertLayout } = loadTs(B06("B06_Section_UI_Cross_Culvert_Geom.ts"));
function tiers(dz) {
  const s = clone(at(180));
  shiftGround(s, dz);
  s.culvert = {
    type: "pipe",
    chainage_m: 180,
    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)" },
  };
  s.design.inlet_structure = "revet";
  const tier = { x: null, d: null, h: 2, m: null };
  const layout = computeCulvertLayout(s, s.samples, { extras: [tier, tier] }, "revet");
  return {
    walls: layout.extraWalls.map((w) => [r3(w.bottomBack.offset), r3(w.bottomBack.elevation)]),
    slopes: layout.outletFill.segments.slice(0, 2).map((g) => r3(g.lengthM)),
  };
}
out.tiers = [tiers(0), tiers(0.5), tiers(-0.5)];

// ⑤ 91-3 전면 기울기 — 단면유형(원지반 자동판정)과 무관 · 성토/절토 칸만
const { leanOf } = loadTs(B06("logic/B06_Section_UI_Cross_Lean.ts"));
out.lean = ["left_cut", "right_cut", "both_fill", "both_cut"].map((mode) => [
  leanOf({ form: "돌쌓기(찰)", height_m: 1.5, section_mode: mode, side: "좌" }),
  leanOf({ form: "돌쌓기(찰)", height_m: 1.5, section_mode: mode, side: "좌", face_role: "절토" }),
]);
// ③ 91-4 유출측 절토 복합경사 — 꼭짓점 사이 경사(수평/수직) · 사면 길이 · 끝 = 원지반 교점
const { groundInterpolator } = loadTs(B06("logic/B06_Section_UI_Cross_Culvert_Solve.ts"));
function profile(points, samples) {
  const groundAt = groundInterpolator(samples);
  const legs = points.slice(1).map((p, i) => {
    const dx = Math.abs(p.offset - points[i].offset);
    const dz = p.elevation - points[i].elevation;
    return { ratio: dz > 1e-9 ? r3(dx / dz) : null, slant: r3(Math.hypot(dx, dz)), run: r3(dx) };
  });
  const end = points[points.length - 1];
  return { legs, endGap: r3(Math.abs(groundAt(end.offset) - end.elevation)) };
}
const withBerm = (s) => {
  s.design.berm = { width_m: 0.5, interval_m: 3, slope_deg: 0 };
};
// 흙막이 수평공간 뒤(박스 352.14 · 세월교 173.09)
function guardTails(base, edit = () => undefined) {
  const s = clone(base);
  edit(s);
  const { culvert } = layoutsOf(s, base);
  const tagged = (segments, role) => segments.map((g) => ({ ...g, role }));
  return [
    ...tagged(culvert.outletFill.segments, "outlet"),
    ...tagged(culvert.basinFill.segments, "inlet"),
  ]
    .filter((g) => g.kind === "cut")
    .map((g) => ({ role: g.role, ...profile(g.points, s.samples) }));
}
out.guardTails = [...guardTails(at(352.14)), ...guardTails(FORD)];
// 박스 끝 · 세월교 측벽 끝(흙막이 없음)
const { computeBoxLayout } = loadTs(B06("B06_Section_UI_Cross_Box_Geom.ts"));
const { computeFordLayout } = loadTs(B06("B06_Section_UI_Cross_Ford_Geom.ts"));
function endCuts(base, compute) {
  const s = clone(base);
  delete s.culvert;
  s.uphill_side = "left"; // 절토 쪽(우측)을 유출로
  return compute(s, s.samples)
    .sides.filter((side) => side.cutLine)
    .map((side) => profile(side.cutLine, s.samples));
}
out.boxEnd = endCuts(at(352.14), computeBoxLayout);
out.fordEnd = endCuts(FORD, computeFordLayout);
// 절토 쪽 배관 유출 벽 뒤(관 340 · 유출 = 우측 절토) · 소단 있음/없음
function cutOutlet(edit = () => undefined) {
  const s = clone(at(340));
  s.uphill_side = "left";
  s.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)" },
  };
  s.design.inlet_structure = "revet";
  edit(s);
  const layout = computeCulvertLayout(s, s.samples, undefined, "revet");
  // 벽 뒤 절토 = 유출 끝 연결선(139-4) — 벽 모서리 절토는 또 잇지 않음(186-1)
  const start = layout.outletFill.segments.at(-1).points[0];
  const pts = layout.designTrim.minSlope.points;
  const from = pts.findIndex((p) => Math.abs(p.offset - start.offset) < 1e-9);
  return profile(pts.slice(from), s.samples);
}
out.cutOutlet = cutOutlet();
out.cutOutletBerm = cutOutlet(withBerm);
process.stdout.write(JSON.stringify(out));