/* PLAN 370-2 단위검증 헬퍼 — B06 사면 이동 멈춤 · 교차점 손잡이 · 고름 이어받기.
 * 화면 TS 를 그 자리에서 트랜스파일해 Node 로 돌림 · 결과 = 표준출력 JSON 한 벌.
 * 입력 = argv[2] 표준단면 JSON(파이썬 config) · 마루 지반(우측 −4 m 너머 내리막). 짝 = `test_370_2_toe_stop.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();
const STUBS = {
  "@ui/ui_template_toast": { showToast: () => undefined },
  "@ui/ui_template_elements": { showToast: () => undefined },
};

class FakeNode {
  constructor(tag) {
    this.tagName = String(tag);
    this.children = [];
    this.attrs = {};
    this.listeners = {};
    this.hidden = false;
    this.title = "";
    this._text = "";
    this._classes = new Set();
    const self = this;
    this.classList = {
      add: (...names) => names.forEach((n) => self._classes.add(n)),
      remove: (...names) => names.forEach((n) => self._classes.delete(n)),
      toggle: (name, force) => {
        const on = force === undefined ? !self._classes.has(name) : !!force;
        on ? self._classes.add(name) : self._classes.delete(name);
        return on;
      },
      contains: (name) => self._classes.has(name),
    };
    this.style = { setProperty: () => {} };
  }
  set className(value) {
    this._classes = new Set(String(value).split(/\s+/).filter(Boolean));
  }
  get className() {
    return [...this._classes].join(" ");
  }
  set textContent(value) {
    this._text = String(value);
    this.children = [];
  }
  get textContent() {
    return this._text + this.children.map((c) => c.textContent).join("");
  }
  get childElementCount() {
    return this.children.length;
  }
  get isConnected() {
    return true;
  }
  _detach(kid) {
    if (kid.parent) kid.parent.children = kid.parent.children.filter((k) => k !== kid);
    kid.parent = this;
  }
  append(...kids) {
    kids.forEach((k) => {
      if (typeof k === "string") return;
      this._detach(k);
      this.children.push(k);
    });
  }
  prepend(...kids) {
    kids.reverse().forEach((k) => {
      this._detach(k);
      this.children.unshift(k);
    });
  }
  appendChild(kid) {
    this.append(kid);
    return kid;
  }
  insertBefore(kid, ref) {
    this._detach(kid);
    const at = ref ? this.children.indexOf(ref) : -1;
    if (at < 0) this.children.push(kid);
    else this.children.splice(at, 0, kid);
    return kid;
  }
  remove() {
    if (this.parent) this.parent.children = this.parent.children.filter((k) => k !== this);
  }
  querySelector() {
    return null;
  }
  setAttribute(name, value) {
    this.attrs[name] = String(value);
    if (name === "class") this.className = value;
  }
  getAttribute(name) {
    return name === "class" ? this.className : (this.attrs[name] ?? null);
  }
  hasAttribute(name) {
    return name in this.attrs;
  }
  addEventListener(type, fn) {
    (this.listeners[type] ??= []).push(fn);
  }
  click() {
    const event = { stopPropagation: () => {}, preventDefault: () => {} };
    (this.listeners.click ?? []).forEach((fn) => fn(event));
  }
}
const docKeys = new Set(); // 방향키 듣개(379-1 · 정확히 0 자리)
globalThis.document = {
  createElement: (tag) => new FakeNode(tag),
  createElementNS: (_ns, tag) => new FakeNode(tag),
  addEventListener: (type, fn) => type === "keydown" && docKeys.add(fn),
  removeEventListener: (type, fn) => type === "keydown" && docKeys.delete(fn),
};
globalThis.window = { setTimeout, clearTimeout, addEventListener: () => {} };

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];
    if (request.endsWith(".css")) return {};
    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}.ts`);
const pick = loadTs(B06("B06_Section_UI_Cross_Design_Pick"));
const fit = loadTs(B06("logic/B06_Section_UI_Cross_Fit"));
const { appendCrossDesignOverlay } = loadTs(B06("B06_Section_UI_Cross_Design"));
const { computeCrossDesign } = loadTs(
  path.join(ROOT, "common_util", "common_util_cross_design.ts"),
);
const standard = JSON.parse(fs.readFileSync(process.argv[2], "utf8"));
const out = {};

// 마루 지반 — 우측 −4 m 까지 평지(노면보다 높음 = 절토) · 그 너머 1:0.6 내리막
const samples = Array.from({ length: 49 }, (_, i) => {
  const o = -12 + i * 0.5;
  return { offset_m: o, elevation_m: 100.3 - 0.6 * Math.max(0, -o - 4), valid: true };
});
const groundAt = (o) => 100.3 - 0.6 * Math.max(0, -o - 4);
const designOf = (extendRight) => {
  const result = computeCrossDesign(samples, 100, {
    standard,
    groundType: "soil",
    sectionMode: "right_cut",
    ditchSide: "right",
    shoulderExtendRightM: extendRight,
  });
  // 화면 design 칸 이름(저장 · 응답과 같음)
  return { ...result, shoulder_extend_right_m: extendRight, shoulder_extend_left_m: 0 };
};
const section = (extendRight) => ({
  station_id: "S1",
  chainage_m: 20,
  samples,
  design: designOf(extendRight),
});

// ① 멈춤 — 우측 노견 끝이 원지반을 지나는 한 걸음 사이 → 그 자리
const gapAt = (design, e) => {
  const { left, right } = design.road_edges;
  const o = -(Math.abs(right.offset_m) - (design.shoulder_extend_right_m ?? 0) + e);
  const plane =
    right.elevation_m +
    ((left.elevation_m - right.elevation_m) * (o - right.offset_m)) /
      (left.offset_m - right.offset_m);
  return groundAt(o) - plane;
};
const base = designOf(0);
let crossing = null;
for (let e = 0; e < 6; e = Math.round((e + 0.1) * 10) / 10) {
  if (Math.sign(gapAt(base, e)) !== Math.sign(gapAt(base, e + 0.1))) {
    crossing = [e, Math.round((e + 0.1) * 10) / 10];
    break;
  }
}
const stop = fit.extendStop(
  samples,
  designOf(crossing[0]).road_edges,
  "right",
  crossing[0],
  crossing[1],
);
out.stop = {
  crossing,
  value: stop,
  gap: Math.abs(gapAt(base, stop)),
  noCross: fit.extendStop(samples, base.road_edges, "right", 0, 0.1),
  // 멈춘 자리에서 다음 걸음은 그대로 감(다시 안 섬)
  fromStop: fit.extendStop(
    samples,
    designOf(stop).road_edges,
    "right",
    stop,
    Math.round((stop + 0.1) * 10) / 10,
  ),
  leftNoGround: fit.extendStop([], base.road_edges, "left", 0, 0.1),
};
// 370-4 — 0.001 m 반올림이 교차 **앞**에 떨어진 멈춤(54+0 0.936 꼴) → 다음 걸음은 넘어감(같은 교차에 다시 안 섬)
{
  const [ga, gb] = crossing.map((e) => gapAt(base, e));
  const exact = crossing[0] + ((crossing[1] - crossing[0]) * ga) / (ga - gb);
  let before = Math.floor(exact * 1000) / 1000;
  if (before === exact) before -= 0.001;
  const next = Math.round((before + 0.1) * 1000) / 1000;
  out.before = {
    exact,
    before,
    gapMm: Math.abs(gapAt(base, before)) * 1000,
    next,
    got: fit.extendStop(samples, designOf(before).road_edges, "right", before, next),
  };
}

// ② 교차점 손잡이 — 바뀜 자리(노견 끝 = 원지반) 쪽만 원 · 키 toe:left|right · 고르면 ◀▶ 로 절 ↔ 성(414-1)
const x = (o) => 300 - o * 20;
const y = (e) => 400 - (e - 100) * 20;
const attach = (sec, changes) => {
  const layer = new FakeNode("g");
  const from = layer.childElementCount;
  appendCrossDesignOverlay(layer, sec.design, x, y, sec.samples, undefined);
  layer.children.slice(from).forEach((el) => el.setAttribute(pick.DESIGN_LINE_ATTR, ""));
  const picks = [];
  const handle = pick.attachDesignLinePick({
    layer,
    design: sec.design,
    x,
    toDisplayY: y,
    onPick: (i) => picks.push(i),
    ...pick.designLineMoves(sec, (_chainage, change) => changes.push(change)),
  });
  return { layer, handle, picks };
};
const toesOf = (layer) => layer.children.filter((k) => k.classList.contains("b06-chart__toe-hit"));
const near = section(crossing[0]); // 보통 단면(우 = 절토 · 바뀜 자리 아님)
const nearToes = toesOf(attach(near, []).layer);
const changes = [];
const bareSec = section(out.stop.value); // 바뀜 자리(우 노견 끝 = 원지반)
const { layer, handle, picks } = attach(bareSec, changes);
const toes = toesOf(layer);
const moves = pick.designLineMoves(bareSec, () => undefined);
const keys = moves.toes;
const rightToeHit = toes.find((t) => Number(t.getAttribute("cx")) > x(0));
out.toe = {
  nearCount: nearToes.length,
  nearSides: ["left", "right"].filter((s) => pick.designLineMoves(near, () => undefined).toes[s]),
  count: toes.length,
  bareSides: ["left", "right"].filter((s) => keys[s] && moves.bare[s]),
  centerClass: toes.every((t) => t.classList.contains("b06-chart__center-hit")),
  rightOnGround:
    keys.right && Math.abs(keys.right.elevation_m - groundAt(keys.right.offset_m)) < 1e-9,
  rightCx: rightToeHit ? Number(rightToeHit.getAttribute("cx")) : null,
  rightX: keys.right ? x(keys.right.offset_m) : null,
};
rightToeHit.click();
handle.setActive(picks[0]);
// 아래 띠 공용 칸(370-3) — 제목 · 버튼 줄(끝 = 값 글)
const cellOf = (h) => ({
  title: h.cell.children[0].textContent,
  value: h.cell.children[1].children.at(-1).textContent,
  button: (slot) =>
    h.cell.children[1].children.find((k) =>
      k.classList.contains(`b06-cross-card__cell-btn--${slot}`),
    ),
});
const cell = cellOf(handle);
cell.button(x(-1) > x(0) ? "right" : "left").click(); // 화면 → 바깥(우 = −offset)
cell.button(x(-1) > x(0) ? "left" : "right").click(); // 화면 → 안쪽
out.toePick = {
  picked: picks,
  active: rightToeHit.classList.contains("is-active"),
  modeBefore: bareSec.design.section_mode,
  modes: changes.map((c) => section(c.shoulder_extend.valueM).design.section_mode),
  value: cell.value,
  title: cell.title,
  panelOpen: !handle.cell.classList.contains("is-empty"),
  sent: changes.map((c) => c.shoulder_extend),
};

// ③ 고름 이어받기 — 우 절토 사면을 고른 뒤 마루 너머로 옮기면(키 cut → fill) 같은 쪽 손잡이
const cutIndex = handle.pieces.findIndex(
  (p) =>
    pick.pieceZone(near.design, p).zone === "cut" &&
    pick.pieceZone(near.design, p).side === "right",
);
pick.setPickedLine("S1", null);
attach(near, []); // 키 적음
pick.setPickedLine("S1", cutIndex);
const before = pick.pickedLineAt("S1");
const far = section(crossing[1] + 1.0);
const after = attach(far, []);
const afterIndex = pick.pickedLineAt("S1");
out.inherit = {
  cutIndex,
  before,
  farMode: far.design.section_mode,
  afterIndex,
};
after.handle.setActive(afterIndex);
out.inherit.label = cellOf(after.handle).title;

// ⑤ 370-5 — 손잡이를 고른 뒤 넘어간 사면이 원지반과 못 만나면(손잡이 없음) 같은 쪽 첫 사면 선이 이어받음
pick.setPickedLine("S1", null);
{
  const again = attach(bareSec, []);
  toesOf(again.layer)
    .find((t) => Number(t.getAttribute("cx")) > x(0))
    .click();
  pick.setPickedLine("S1", again.picks[0]);
  let extend = crossing[1];
  let open = null;
  while (extend < 10 && !open) {
    extend = Math.round((extend + 0.5) * 10) / 10;
    const sec = section(extend);
    if (!pick.designLineMoves(sec, () => undefined).toes.right) open = sec;
  }
  const lost = attach(open, []);
  const index = pick.pickedLineAt("S1");
  const piece = index === null ? null : lost.handle.pieces[index];
  lost.handle.setActive(index);
  const cell = cellOf(lost.handle);
  out.noToe = {
    extend,
    toeGone: !!open,
    index,
    zone: piece && pick.pieceZone(open.design, piece),
    title: cell.title,
    buttons: ["left", "reset", "right"].filter((slot) => cell.button(slot)),
  };
}

// ④ 정확히 0 자리(379-1) — 노견 끝 = 원지반(±5 mm = 절·성토 없음) · 손잡이 · 누르면 사면처럼 ◀↺▶ · 방향키
// 조각 0 은 안 봄 — 그림 규칙(노견 끝 → 첫 접점 보호 구간)이 지반 위 짧은 선을 남김(브레인 A)
const zero = section(out.stop.value);
const zeroPicks = [];
const zeroLayer = new FakeNode("g");
appendCrossDesignOverlay(zeroLayer, zero.design, x, y, zero.samples, undefined);
zeroLayer.children.forEach((el) => el.setAttribute(pick.DESIGN_LINE_ATTR, ""));
const zeroHandle = pick.attachDesignLinePick({
  layer: zeroLayer,
  design: zero.design,
  x,
  toDisplayY: y,
  onPick: (i) => zeroPicks.push(i),
  ...pick.designLineMoves(zero, () => undefined),
});
const zeroToes = zeroLayer.children.filter((k) => k.classList.contains("b06-chart__toe-hit"));
const rightToe = zeroToes.find((t) => Number(t.getAttribute("cx")) > x(0));
docKeys.clear();
rightToe?.click();
zeroHandle.setActive(zeroPicks[0]);
const zeroCell = cellOf(zeroHandle);
out.zero = {
  bare: pick.designLineMoves(zero, () => undefined).bare,
  nearBare: pick.designLineMoves(near, () => undefined).bare,
  toe: !!rightToe,
  radius: rightToe ? rightToe.getAttribute("r") : null,
  title: zeroCell.title,
  value: zeroCell.value,
  buttons: ["left", "reset", "right"].filter((slot) => zeroCell.button(slot)),
  keys: docKeys.size,
};

process.stdout.write(JSON.stringify(out));