/* PLAN 424 단위검증 헬퍼 — 횡단 카드 중심점 = ▲▼(종단 계획고)만 · 좌우는 평면에서만(요구 260).
 * 화면 TS(`B06_Section_UI_Cross_Design_Pick` · `_Cross_Center`)를 트랜스파일해 Node 로 돌림(가짜 DOM =
 * `helper_370_2_toe_stop.cjs` 꼴) · 결과 = 표준출력 JSON 한 벌. 입력 = argv[2] 표준단면 JSON. 짝 = `test_356_b06_card_center.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.parent = null;
    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);
  }
  get descendants() {
    return this.children.flatMap((c) => [c, ...c.descendants]);
  }
  /** `.이름` 한 개만 — 방향키 듣개가 슬롯 단추를 찾는 꼴(◀▶ 단추가 있으면 누름). */
  querySelector(sel) {
    return this.descendants.find((n) => n.classList.contains(sel.slice(1))) ?? null;
  }
  getClientRects() {
    return this.classList.contains("is-hidden") ? [] : [{}];
  }
  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 centerMod = loadTs(B06("B06_Section_UI_Cross_Center"));
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"));

// 평지보다 조금 높은 지반 = 양쪽 절토(교차점 손잡이 없음 · 중심점 원 하나)
const samples = Array.from({ length: 49 }, (_, i) => ({
  offset_m: -12 + i * 0.5,
  elevation_m: 100.3,
  valid: true,
}));
const design = {
  ...computeCrossDesign(samples, 100, { standard, groundType: "soil", sectionMode: "both_cut" }),
  shoulder_extend_left_m: 0,
  shoulder_extend_right_m: 0,
};
const section = { station_id: "S1", chainage_m: 20, samples, design };
const x = (o) => 300 - o * 20;
const y = (e) => 400 - (e - 100) * 20;
const layer = new FakeNode("g");
appendCrossDesignOverlay(layer, design, x, y, samples, undefined);
layer.children.forEach((el) => el.setAttribute(pick.DESIGN_LINE_ATTR, ""));
const picks = [];
const changes = [];
const moves = pick.designLineMoves(section, (_c, change) => changes.push(change));
const handle = pick.attachDesignLinePick({
  layer,
  design,
  x,
  toDisplayY: y,
  onPick: (i) => picks.push(i),
  ...moves,
});
const centers = layer.children.filter(
  (k) =>
    k.classList.contains("b06-chart__center-hit") && !k.classList.contains("b06-chart__toe-hit"),
);
const center = centers[0];
center.click();
handle.setActive(picks[0]);
const row = handle.cell.children[1];
const press = (key) => {
  let prevented = false;
  const event = { key, target: null, preventDefault: () => (prevented = true) };
  [...docKeys].forEach((fn) => fn(event));
  return prevented;
};
const out = {
  moves: { center: moves.center },
  count: centers.length,
  cx: center ? Number(center.getAttribute("cx")) : null,
  x0: x(0),
  active: center.classList.contains("is-active"),
  title: handle.cell.children[0].textContent,
  value: row.children.at(-1).textContent,
  // 보이는 버튼(숨은 버튼 = 슬롯 없음)
  slots: row.children
    .filter((k) => /cell-btn--/.test(k.className) && !k.hidden)
    .map((k) => k.className.match(/cell-btn--(\w+)/)[1]),
  panelOpen: !handle.cell.classList.contains("is-empty"),
  // 방향키 — ◀▶ = 먹어 막음(아무것도 안 옮김) · ▲▼ = 안 막음(종단도 듣개 = 종단 계획고)
  keys: {
    left: press("ArrowLeft"),
    right: press("ArrowRight"),
    up: press("ArrowUp"),
    down: press("ArrowDown"),
  },
  dragListeners: (center.listeners.pointerdown ?? []).length,
  changes: changes.length,
  exports: Object.keys(centerMod).sort(),
};
process.stdout.write(JSON.stringify(out));