/* PLAN 429 단위검증 헬퍼 — [저장] 길 정합.
 *   ④ 노선 저장 뒤 횡단 저장 = 고침이 없어도 한 번(`saveCachedCrossPatches`)
 *   ⑨ 추가 측점 = 계산 묶음 입력(`plusStations` · stations 부터) · 가게 초안 바뀜 → 묶음에 넣음(`feedFacilities`)
 * TS 를 그 자리에서 트랜스파일해 Node 로 돌림 · 서버 창구 · 화면 모듈은 가짜. 짝 = `test_429_save_path.py`. */
const fs = require("fs");
const path = require("path");
const ts = require(path.join(__dirname, "..", "..", "config", "node_modules", "typescript"));

const ROOT = path.join(__dirname, "..", "..");
globalThis.window = { sessionStorage: null, localStorage: null, setTimeout, clearTimeout };

/** 아무 이름이나 받는 가짜 모듈 — 부르면 undefined. */
const anything = () =>
  new Proxy({}, { get: (_target, key) => (key === "__esModule" ? false : () => undefined) });

function loader(stubs, real = () => false) {
  const cache = new Map();
  const load = (file) => {
    const full = path.resolve(file);
    if (cache.has(full)) return cache.get(full);
    const js = ts.transpileModule(fs.readFileSync(full, "utf8"), {
      compilerOptions: { module: ts.ModuleKind.CommonJS, target: ts.ScriptTarget.ES2020 },
    }).outputText;
    const box = { exports: {} };
    cache.set(full, box.exports);
    const localRequire = (request) => {
      if (stubs[request]) return stubs[request];
      const target = path.join(path.dirname(full), `${request}.ts`);
      if (request.startsWith(".") && real(target)) return load(target);
      return anything();
    };
    new Function("exports", "module", "require", js)(box.exports, box, localRequire);
    cache.set(full, box.exports);
    return box.exports;
  };
  return load;
}

async function run() {
  const out = {};

  // ④ 고침이 없어도 횡단 저장 한 번 — 서버가 지금 종단으로 횡단을 다시 셈
  const sent = [];
  const store = loader({
    "./B06_Section_Api_Fetch": {
      saveSections: async (...args) => (sent.push(args.map((a) => a ?? null)), {}),
      fetchSectionDetail: async () => null,
    },
  })(path.join(ROOT, "B06_Section", "B06_Section_Section_Store.ts"));
  out.noPatchReturn = await store.saveCachedCrossPatches("p1", 9);
  out.noPatchSent = sent;

  // ⑨ 묶음 — 추가 측점이 바뀌면 stations 부터 · 같은 값이면 안 셈
  const DESIGN = path.join(ROOT, "A00_Common", "design");
  const pipeMod = loader({}, () => true)(path.join(DESIGN, "logic", "design_pipeline.ts"));
  out.stationsDeps = pipeMod.STAGE_DEPS.stations;
  const ran = [];
  const stages = {};
  for (const name of [...pipeMod.BROWSER_STAGES, ...pipeMod.AFTER_STAGES])
    stages[name] = (ctx) => (ran.push(name), { name, plus: ctx.inputs.plusStations ?? null });
  stages.follow = () => (ran.push("follow"), null); // 입력 고침 없음
  const pipe = pipeMod.createDesignPipeline({ stages });
  await pipe.start({
    route: null,
    alignment: null,
    cross: null,
    pipes: [],
    structures: [],
    plusStations: [],
  });
  ran.length = 0;
  await pipe.update("plus", [40]);
  out.plusRan = [...ran];
  out.plusSeen = pipe.output("stations")?.plus ?? null;
  ran.length = 0;
  out.sameValue = pipe.update("plus", [40]); // 같은 값 = 차례 안 띄움(null)
  await new Promise((resolve) => setTimeout(resolve, 0));
  out.sameRan = [...ran];

  // ⑨ 먹이기 — 가게 추가 측점 초안이 바뀌면 묶음에 · 비면 저장분 · 되돌리기는 입력과 견줘 다를 때만
  let restore = null;
  const listeners = new Map();
  const values = new Map();
  const fakeStore = {
    get: (key) => values.get(key) ?? null,
    set: (key, value) => (
      values.set(key, value),
      (listeners.get(key) ?? []).forEach((fn) => fn(value))
    ),
    subscribe: (key, fn) => {
      listeners.set(key, [...(listeners.get(key) ?? []), fn]);
      return () => undefined;
    },
  };
  const fed = [];
  const inputNow = { plusStations: [12] };
  const feeder = loader({
    "../../B05_Profile/B05_Profile_UI_Profile_History": {
      onPageHistory: (hooks) => ((restore = hooks.restore), () => undefined),
    },
    "./design_save": { savingDesign: () => false },
  })(path.join(DESIGN, "design_pipeline_facilities.ts"));
  feeder.feedFacilities({
    projectId: "p1",
    store: fakeStore,
    ready: () => true,
    gone: () => false,
    saved: (key) => (key === "plusStations" ? [12] : []),
    input: (key) => inputNow[key] ?? null,
    routed: () => false,
    feed: (source, value) => fed.push([source, value]),
    resync: async () => undefined,
  });
  fakeStore.set("plusStations", [12, 30]);
  fakeStore.set("plusStations", null); // 초안 비움 = 저장분
  out.fed = [...fed];
  fed.length = 0;
  values.set("plusStations", [12, 55]); // 되돌리기 = 세션만 되씀(알림 없음)
  restore?.();
  out.restoreFed = fed.filter(([source]) => source === "plus");
  return out;
}

run().then(
  (out) => console.log(JSON.stringify(out)),
  (error) => {
    console.error(error);
    process.exit(1);
  },
);