/* PLAN 266-1 단위검증 헬퍼 — [상세] 처음 가로 범위 = 카드 반폭.
 * 실제 TS(`_Cross_View_Metrics` 칸 맞춤 · `b_svg_zoom_pan` homeScale)를 Node 로 돌림.
 * 처음 배율 = 뷰 `detailChart` 와 같은 식(base.ppm / fitted.ppm · 짝 시험이 원본 줄을 확인).
 * 결과 = 표준출력 JSON 한 벌. 짝 = `test_266_detail_home.py`.
 */
const fs = require("fs");
const path = require("path");
const { makeLoader } = require("./helper_ts_stub_loader.cjs");

const ROOT = path.join(__dirname, "..", "..");
const B06 = path.join(ROOT, "B06_Section");
const common = fs.readFileSync(path.join(B06, "B06_Section_UI_Section_Common.ts"), "utf8");
const CROSS_PAD = Function(`return ${/export const CROSS_PAD = (\{[^}]*\})/.exec(common)[1]}`)();
const CROSS_HEIGHT = Number(/export const CROSS_HEIGHT = (\d+)/.exec(common)[1]);
const STUBS = {
  "./B06_Section_UI_Section_Common": {
    CROSS_PAD,
    CROSS_HEIGHT,
    validElevation: (s) => s.valid !== false && Number.isFinite(s.elevation_m),
  },
};
const { loadTs } = makeLoader({
  root: ROOT,
  cache: false,
  requireFor: (full) => (request) => STUBS[request] ?? {},
});
// 휠 방향과 무관한 시험(처음으로 · 범위) — 337 기본 밂 뒤에도 당김 수치 그대로(pull 박음)
globalThis.localStorage = {
  getItem: (k) => (k === "aislo:pref:input-prefs" ? '{"wheelZoom":"pull"}' : null),
};
STUBS["./input_prefs"] = loadTs(path.join(ROOT, "A00_Common", "input_prefs.ts")); // 휠 방향(332)
const metrics = loadTs(path.join(B06, "B06_Section_UI_Cross_View_Metrics.ts"));
const { attachSvgZoomPan } = loadTs(path.join(ROOT, "A00_Common", "b_svg_zoom_pan.ts"));

function fakeSvg(width, height) {
  const listeners = {};
  const attrs = {};
  return {
    attrs,
    setAttribute: (name, value) => (attrs[name] = String(value)),
    getAttribute: (name) => attrs[name] ?? null,
    classList: { add() {}, remove() {} },
    addEventListener: (type, fn) => (listeners[type] ??= []).push(fn),
    fire: (type, event) =>
      (listeners[type] ?? []).forEach((fn) =>
        fn({ preventDefault() {}, stopPropagation() {}, pointerId: 1, ...event }),
      ),
    setPointerCapture() {},
    releasePointerCapture() {},
    getBoundingClientRect: () => ({ left: 0, top: 0, width, height }),
  };
}

// 가파른 비탈 — ±30 m 샘플 · 1 m 마다 · 1 m 에 0.6 m 오름(칸 맞춤이 가로를 넓히게)
const section = {
  samples: Array.from({ length: 61 }, (_, i) => ({
    offset_m: i - 30,
    elevation_m: 100 + 0.6 * (i - 30),
  })),
};

/** 반폭 · 칸 크기로 상세 창을 연 셈 → 처음 · 줌 · 팬 · 원복 뒤 보이는 가로 범위(m). */
function open(halfWidth, W, H) {
  const base = metrics.crossPlotBase(section, 1, W, halfWidth, 100);
  const fitted = metrics.fitPlotBase(base, H);
  const homeScale = base && fitted ? base.pixelsPerMeter / fitted.pixelsPerMeter : 1;
  const svg = fakeSvg(W, H);
  const layer = fakeSvg(W, H);
  let state = null;
  const handle = attachSvgZoomPan({
    svg,
    layer,
    widthPx: W,
    heightPx: H,
    pad: CROSS_PAD,
    maxScale: 16,
    content: { x: -W, y: -H, width: 3 * W, height: 3 * H },
    wheelZoom: true,
    homeScale,
    onChange: (next) => (state = next),
  });
  // 보이는 플롯 가로 끝(svg x) → 도형 층 x → 측점 거리(m)
  const range = () => {
    const s = state ?? { scale: 1, tx: 0, ty: 0 };
    const toM = (x) =>
      fitted.minOffset + ((x - s.tx) / s.scale - CROSS_PAD.left) / fitted.pixelsPerMeter;
    return [toM(CROSS_PAD.left), toM(W - CROSS_PAD.right)].map((v) => Math.round(v * 1000) / 1000);
  };
  const out = { homeScale, widened: fitted !== base, first: range() };
  svg.fire("wheel", { clientX: W / 2, clientY: H / 2, deltaY: 100 });
  out.wheelScale = state.scale / homeScale;
  svg.fire("pointerdown", { button: 1, clientX: 100, clientY: 100 });
  svg.fire("pointermove", { clientX: 160, clientY: 100 });
  svg.fire("pointerup", {});
  out.panned = range()[0] !== out.first[0];
  handle.reset(); // [⤢]
  out.reset = range();
  for (let i = 0; i < 40; i++) svg.fire("wheel", { clientX: W / 2, clientY: H / 2, deltaY: -100 });
  out.minScale = state.scale; // 줄이면 칸 맞춤 전체(1배)까지
  svg.fire("dblclick", {});
  out.dblclick = range();
  return out;
}

process.stdout.write(
  JSON.stringify({
    global15: open(15, 1200, 300),
    station10: open(10, 1200, 300),
    tall15: open(15, 1200, 900),
  }),
);