/* PLAN 137-2 · 137-3 단위검증 헬퍼 — B06 보라 선 고름(조각 · 가림 · 치수 · 구역 · 판정 선 · 한 칸 고름).
 * 화면 TS 를 그 자리에서 트랜스파일해 Node 로 돌림 · 결과 = 표준출력 JSON 한 벌.
 * 입력 = 손으로 짠 단면 + `fixtures/b07_cross_overlay_sections.json` 배관 측점 85.052. 짝 = `test_137_design_pick.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 },
};

// ── 화면 그릇 흉내 — 오버레이 · 판정 선이 쓰는 만큼만 ─────────────────────────
class FakeNode {
  constructor(tag) {
    this.tagName = String(tag);
    this.children = [];
    this.attrs = {};
    this.listeners = {};
    this.hidden = false;
    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 nextElementSibling() {
    const kids = this.parent?.children ?? [];
    return kids[kids.indexOf(this) + 1] ?? null;
  }
  _detach(kid) {
    if (kid.parent) kid.parent.children = kid.parent.children.filter((k) => k !== kid);
    kid.parent = this;
  }
  append(...kids) {
    kids.forEach((k) => {
      this._detach(k);
      this.children.push(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);
  }
  matches(selector) {
    if (selector === "text") return this.tagName === "text";
    return selector
      .split(",")
      .map((part) => part.trim())
      .some((part) =>
        part === "text" ? this.tagName === "text" : this._classes.has(part.slice(1)),
      );
  }
  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() {
    let stopped = false;
    const event = { stopPropagation: () => (stopped = true), preventDefault: () => {} };
    (this.listeners.click ?? []).forEach((fn) => fn(event));
    return stopped;
  }
}
globalThis.document = {
  createElement: (tag) => new FakeNode(tag),
  createElementNS: (_ns, tag) => new FakeNode(tag),
  addEventListener: () => {}, // 조정창 공용 부품(사면 이동 패널 · 151-3)이 불러올 때 닮
  removeEventListener: () => {},
};

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 {}; // 화면 꾸밈 — Node 에선 안 씀(138-4 모달 CSS)
    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 { pointInPolygon } = loadTs(path.join(ROOT, "A00_Common", "b_polygon_clip.ts"));
const out = {};
const r3 = (v) => Math.round(v * 1000) / 1000;
const pt = (offset, elevation) => ({ offset, elevation });

// ① 조각 — 0.5 m 토막 노면(가운데 꺾임) · 측구 · 사면이 직선 조각 다섯으로
const sampled = (a, b, step = 0.5) => {
  const n = Math.max(1, Math.round(Math.abs(b.offset - a.offset) / step));
  return Array.from({ length: n + 1 }, (_, i) =>
    pt(
      a.offset + ((b.offset - a.offset) * i) / n,
      a.elevation + ((b.elevation - a.elevation) * i) / n,
    ),
  );
};
const line = [
  ...sampled(pt(-6, 98), pt(-2.5, 99.95)), // 우 성토 사면
  ...sampled(pt(-2.5, 99.95), pt(0, 100)).slice(1), // 우 노면 2%
  ...sampled(pt(0, 100), pt(2.5, 99.95)).slice(1), // 좌 노면 2%
  ...sampled(pt(2.5, 99.95), pt(3, 99.65)).slice(1), // 측구 안
  ...sampled(pt(3, 99.65), pt(6, 102.65)).slice(1), // 좌 절토 사면
].map((p) => ({ offset: r3(p.offset), elevation: Math.round(p.elevation * 1e4) / 1e4 }));
// 토막마다 한 줄(설계선 오버레이 꼴) + 차례를 뒤집은 한 토막(거꾸로 그린 선)
const runs = [];
for (let i = 1; i < line.length; i += 1)
  runs.push({ points: [line[i - 1], line[i]], structure: false });
runs.push({ points: [pt(-6.5, 98 - (0.5 * 1.95) / 3.5), pt(-6, 98)].reverse(), structure: false });
const merged = pick.mergeStraightPieces(runs);
out.merge = {
  segments: runs.length,
  pieces: merged.map((p) => [r3(p.from.offset), r3(p.to.offset)].sort((a, b) => a - b)),
};
// 구조물 선은 같은 직선이어도 설계선과 안 합침
out.mergeStructure = pick.mergeStraightPieces([
  { points: [pt(10, 0), pt(11, 1)], structure: false },
  { points: [pt(11, 1), pt(12, 2)], structure: true },
]).length;

// ② 가림 — 사면을 가로지르는 벽 → 벽 밖 두 조각
const slope = [{ from: pt(3, 99.65), to: pt(6, 102.65), structure: false }];
const wall = [pt(4, 100), pt(4.5, 100), pt(4.5, 103), pt(4, 103)];
const visible = pick.visiblePieces(slope, [wall]);
out.occlude = {
  pieces: visible.map((p) => [r3(p.from.offset), r3(p.to.offset)]),
  // 통째로 덮이면 조각 없음
  covered: pick.visiblePieces(slope, [[pt(2, 90), pt(7, 90), pt(7, 110), pt(2, 110)]]).length,
};

// ③ 치수
const fillPiece = { from: pt(-2.5, 99.95), to: pt(-5.5, 97.95), structure: false };
const roadPiece = { from: pt(0, 100), to: pt(2.5, 99.95), structure: false };
out.measure = {
  fill: pick.pieceMeasure(fillPiece, "fill"),
  road: pick.pieceMeasure(roadPiece, "road"),
  flatSlope: pick.pieceMeasure({ from: pt(4, 1), to: pt(5, 1), structure: false }, "cut").grade,
};
const design = {
  road_edges: {
    left: { offset_m: 2.5, elevation_m: 99.95 },
    right: { offset_m: -2.5, elevation_m: 99.95 },
  },
  ditch: { type: "standard", top_width_m: 0.5, bottom_width_m: 0.2, depth_m: 0.3 },
  ditch_side: "left",
  ditch_enabled: true,
  section_mode: "left_cut",
};
out.label = { fill: pick.pieceLabel(design, fillPiece), road: pick.pieceLabel(design, roadPiece) };

// ④ 구역 — 도로 = 두 노견 끝 사이 · 절토 = 측구 + 절토 사면 · 성토 = 성토 사면 + 구조물 선
const zone = (o, structure = false, d = design) => pick.crossZoneAt(d, o, structure);
out.zone = {
  road: zone(1),
  roadEdge: zone(-2.5).zone,
  ditch: zone(2.8),
  cutSlope: zone(5),
  fillSlope: zone(-4),
  structure: zone(5, true).zone,
  rightCutDitch: zone(-2.8, false, { ...design, ditch_side: "right", section_mode: "right_cut" })
    .zone,
  bothFill: zone(5, false, { ...design, ditch_enabled: false, section_mode: "both_fill" }).zone,
  pieceZones: merged.map((p) => pick.pieceZone(design, p).zone),
};

// ⑤ 실제 측점 — 설계선 + 배관 오버레이를 그린 뒤 고름을 붙임(카드와 같은 차례)
const { computeStoredLayouts } = loadTs(B06("B06_Section_Structure_Layouts"));
const { appendCulvertOverlay } = loadTs(B06("B06_Section_UI_Cross_Culvert"));
const { appendCrossDesignOverlay } = loadTs(B06("B06_Section_UI_Cross_Design"));
const { raiseWalls } = loadTs(B06("B06_Section_UI_Cross_Wall"));
const fixture = JSON.parse(
  fs.readFileSync(path.join(__dirname, "fixtures", "b07_cross_overlay_sections.json"), "utf8"),
);
const sections = fixture.cross_sections;
const pipeSection = sections.find((s) => s.culvert && !s.culvert.hidden_pipe);
const layout = computeStoredLayouts(pipeSection, sections).culvert;
const x = (o) => 100 - o * 12;
const y = (e) => 900 - (e - 850) * 12;
const layer = new FakeNode("g");
const from = layer.childElementCount;
appendCrossDesignOverlay(layer, pipeSection.design, x, y, pipeSection.samples, layout.designTrim);
layer.children.slice(from).forEach((el) => el.setAttribute(pick.DESIGN_LINE_ATTR, ""));
appendCulvertOverlay(layer, layout, x, y, () => undefined, false);
raiseWalls(layer);
const picks = [];
const handle = pick.attachDesignLinePick({
  layer,
  design: pipeSection.design,
  x,
  toDisplayY: y,
  onPick: (i) => picks.push(i),
});
const kids = layer.children;
const hits = kids.filter((k) => k.classList.contains("b06-chart__design-hit"));
const firstStructureHit = kids.findIndex((k) =>
  k.classList.contains("b06-chart__culvert-revet-hit"),
);
const lastLineHit = kids.reduce(
  (last, k, i) => (k.classList.contains("b06-chart__design-hit") ? i : last),
  -1,
);
const walls = kids
  .filter((k) => k.tagName === "polygon" && k.classList.contains("b06-chart__culvert-revet"))
  .map((k) =>
    k
      .getAttribute("points")
      .split(/\s+/)
      .map((pair) => pair.split(",").map(Number)),
  );
const insideWall = handle.pieces.filter((p) => {
  const mid = [x((p.from.offset + p.to.offset) / 2), y((p.from.elevation + p.to.elevation) / 2)];
  return walls.some((w) => pointInPolygon(mid, w));
}).length;
const designLines = kids.filter((k) => k.classList.contains("b06-chart__design-cross")).length;
const stopped = hits[0].click();
handle.setActive(1);
const activeOn = hits.map((h) => h.classList.contains("is-active"));
const labelOn = { hidden: handle.label.hidden, text: handle.label.textContent };
handle.setActive(null);
out.real = {
  designLines,
  pieces: handle.pieces.length,
  structurePieces: handle.pieces.filter((p) => p.structure).length,
  hits: hits.length,
  wallCount: walls.length,
  insideWall,
  hitsBelowStructure: firstStructureHit < 0 || lastLineHit < firstStructureHit,
  picked: picks,
  stopped,
  activeCount: activeOn.filter(Boolean).length,
  activeIndex: activeOn.indexOf(true),
  labelOn,
  labelOff: { hidden: handle.label.hidden, text: handle.label.textContent },
  zones: [...new Set(handle.pieces.map((p) => pick.pieceZone(pipeSection.design, p).zone))].sort(),
};

// ⑥ 페이지 한 칸 — 다른 측점을 고르면 앞 측점 고름은 사라짐 · 남의 측점 풀기는 안 건드림
pick.setPickedLine("A", 2);
const a1 = pick.pickedLineAt("A");
pick.setPickedLine("B", 1);
const a2 = pick.pickedLineAt("A");
pick.setPickedLine("A", null);
out.slot = { a1, a2, b: pick.pickedLineAt("B") };
pick.setPickedLine("B", null);
out.slot.cleared = pick.pickedLineAt("B");

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