/* 451 헬퍼(440-4) — 노선 초안 둔 채 새로고침: 진짜 상세 가게 · 진짜 측점 열쇠 · 세션(모듈을 다시 세워도 남음).
 * 초안 시작 hold = 세션 한 벌(열쇠 · 횡단 초안 칸 · 관 · 구조물) · 새로고침 뒤 hold = 그 한 벌(초안으로 옮겨 쓴 세션 아님) ·
 * 버림 = 초안 전 칸 · 초안 얹기 다시(되쓴 관으로) 뒤 초안 전 열쇠. 서버 · 초안 얹기는 가짜. 짝 = `test_451_refresh_hold.py`.
 */
const fs = require("fs");
const path = require("path");
const { makeLoader } = require("./helper_ts_stub_loader.cjs");
const CATALOG = require("./helper_322_catalog_module.cjs");

const ROOT = path.join(__dirname, "..", "..");
const P = "P451";
const ROUTE = 3;

function memoryStorage() {
  const map = new Map();
  return {
    getItem: (k) => (map.has(k) ? map.get(k) : null),
    setItem: (k, v) => map.set(k, String(v)),
    removeItem: (k) => map.delete(k),
    key: (i) => [...map.keys()][i] ?? null,
    get length() {
      return map.size;
    },
  };
}
globalThis.window = { sessionStorage: memoryStorage(), localStorage: memoryStorage() };

const anyModule = (extra = {}) =>
  new Proxy(extra, { get: (t, key) => (key in t ? t[key] : () => undefined) });

/** 서버 — 부를 때마다 지금 `server` 사본 · `gate` 가 풀릴 때 답함. */
let server = null;
let gate = Promise.resolve();
let asked = 0;
const keyAt = (sections) => sections.map((s) => `at:${s.chainage_m.toFixed(2)}`);
const STUBS = {
  "design_pipeline_page.ts": {
    reconcilePagePipeline: async () => 0,
    pipelineOwnsCross: () => false,
    pagePipeline: () => null,
  },
  "design_pipeline_cross.ts": { forceCross: () => undefined },
  "B06_Section_Section_Drafts.ts": {
    forgetDraftStations: () => undefined,
    withDraftShapes: async () => undefined,
    withDraftStations: async (detail) => {
      // 초안 얹기 흉내 — 가게 관 자리(세션 pipes)마다 그 측점 관 표시 · 부른 차례를 적음
      const pipes = state.readState("pipes", P) ?? [];
      calls.push(`stations:${pipes.map((p) => p.chainage_m).join(",")}`);
      for (const s of detail.cross_sections)
        s.pipeAt = pipes.some((p) => p.chainage_m === s.chainage_m);
    },
    supersedeDraftStations: () => undefined,
  },
  "B05_Profile_Api_PlusStations.ts": {
    loadSavedPlusStations: async () => undefined,
    plusStationsOf: () => [],
  },
  "B06_Section_Api_Fetch.ts": anyModule({
    fetchSectionDetail: async () => {
      asked += 1;
      await gate;
      return JSON.parse(JSON.stringify(server));
    },
  }),
  "B06_Section_Api_Culvert_Options.ts": anyModule({ STRUCTURE_ADJUST_KEYS: [] }),
  "B06_Section_Swap_Bus.ts": anyModule(),
  "ui_template_elements.ts": anyModule(),
  "B06_Section_UI_Page_Persist.ts": anyModule({ readCutSlopeSession: () => ({}) }),
  "B06_Section_UI_Standard_Panel.ts": anyModule(),
  "B06_Section_Cross_Design_Session.ts": anyModule({ crossDesignChoices: () => new Map() }),
  "B06_Section_Section_Adjusts.ts": anyModule({ withPipeOptions: async () => undefined }),
  "common_util_cross_design.ts": anyModule(),
  "B06_Section_Cross_Culvert_Wire.ts": anyModule(),
  "B06_Section_Cross_Ford_Geom.ts": anyModule(),
  "B06_Section_Cross_Box_Geom.ts": anyModule(),
  "B06_Section_UI_IrregularStations.ts": anyModule({ PIPE_DISPLAY_NAME: {} }),
  "B05_Profile_UI_IrregularStations.ts": anyModule({ PIPE_DISPLAY_NAME: {} }),
  "config_frontend.ts": anyModule({ PIPE_TYPES: [] }),
};

let cache = new Map();
const calls = [];
const resolve = (base) =>
  [base, `${base}.ts`, path.join(base, "index.ts")].find(
    (p) => fs.existsSync(p) && fs.statSync(p).isFile(),
  ) ?? `${base}.ts`;
const { loadTs } = makeLoader({
  root: ROOT,
  interop: true,
  fileStub: (full) => STUBS[path.basename(full)],
  requireFor: (full) => (request) => {
    if (CATALOG.isCatalogRequest(request)) return CATALOG;
    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)));
  },
});

let store = loadTs(path.join(ROOT, "B06_Section", "B06_Section_Section_Store.ts"));
const state = loadTs(path.join(ROOT, "A00_Common", "b_page_state.ts"));
let keys = loadTs(path.join(ROOT, "B06_Section", "B06_Section_Station_Keys.ts"));
/** 새로고침 흉내 — 모듈 메모리를 비우고 다시 세움(세션 · 서버는 그대로). */
function refresh() {
  const keep = cache.get(path.join(ROOT, "A00_Common", "b_page_state.ts"));
  cache = new Map([[path.join(ROOT, "A00_Common", "b_page_state.ts"), keep]]);
  store = loadTs(path.join(ROOT, "B06_Section", "B06_Section_Section_Store.ts"));
  keys = loadTs(path.join(ROOT, "B06_Section", "B06_Section_Station_Keys.ts"));
}

const sec = (c, kind) => ({
  chainage_m: c,
  kind,
  samples: [],
  design: { design_elevation_m: 100 },
});
// 저장 상세: 340 · 관 351 · 360
const saved = {
  longitudinal: { design_profiles: [], stations: [] },
  cross_sections: [sec(340, "regular"), sec(351, "irregular"), sec(360, "regular")],
};
const at = (c) => ({ key: `at:${c.toFixed(2)}`, chainageM: c });
const savedPipes = [{ id: "p1", chainage_m: 351 }];
const draftPipes = [{ id: "p1", chainage_m: 361 }];
const cell = () => state.readState("crossdesign", P, ROUTE);
const keysNow = () =>
  keys.registeredKeys(P, ROUTE, store.peekSectionDetail(P, ROUTE).cross_sections, 20);

(async () => {
  const out = {};
  server = saved;
  state.writeState("section-detail", saved, P, ROUTE);
  state.writeState("pipes", savedPipes, P);
  state.writeState("crossdesign", { before: true }, P, ROUTE);
  // 탭 1 — 열기 · 노선 초안 시작(hold) · 초안이 세션 칸 · 관을 초안 자리로 옮겨 씀
  const opened = await store.loadSectionDetail(P, ROUTE);
  const first = store.holdSectionDetail(P, ROUTE, opened);
  const kept = state.readState("route-draft-hold", P);
  out.start = {
    kept: !!kept && kept.routeId === ROUTE,
    cells: JSON.stringify(first.cells.find(([n]) => n === "crossdesign")[1]),
    pipes: first.facilities.pipes.map((p) => p.chainage_m),
    keys: first.keys.map((k) => k.chainageM),
  };
  state.writeState("route-draft", { nodes: [], rev: 1 }, P);
  state.writeState("crossdesign", { draft: true }, P, ROUTE);
  state.writeState("pipes", draftPipes, P);

  // 새로고침(초안 둔 채) — 새 모듈 · 세션 그대로 · 상세 = 세션(초안 관 자리로 얹힘)
  refresh();
  calls.length = 0;
  const reopened = await store.loadSectionDetail(P, ROUTE);
  const hold = store.holdSectionDetail(P, ROUTE, reopened);
  out.refresh = {
    cells: JSON.stringify(hold.cells.find(([n]) => n === "crossdesign")[1]),
    pipes: hold.facilities.pipes.map((p) => p.chainage_m),
    keys: JSON.stringify(hold.keys) === JSON.stringify(first.keys),
    pipeShownAt: reopened.cross_sections.filter((s) => s.pipeAt).map((s) => s.chainage_m),
  };
  // 묶음이 초안을 버림 — 가게 관 = hold 관(묶음 몫 흉내) → 되돌림
  state.writeState("route-draft", null, P);
  state.writeState("pipes", hold.facilities.pipes, P);
  calls.length = 0;
  const back = await store.restoreSectionDetail(
    P,
    ROUTE,
    hold,
    saved.cross_sections.map((s) => at(s.chainage_m)),
  );
  out.drop = {
    same: back && back.same,
    cells: JSON.stringify(cell()),
    kept: state.readState("route-draft-hold", P),
    calls: [...calls],
    pipeShownAt: back.detail.cross_sections.filter((s) => s.pipeAt).map((s) => s.chainage_m),
    keys: JSON.stringify(keysNow()) === JSON.stringify(first.keys.map((k) => k.key)),
  };

  // 새 초안(route-draft 없음) = 지금 값을 다시 뜸 · 다른 노선 hold = 안 씀
  state.writeState("crossdesign", { later: true }, P, ROUTE);
  const fresh = store.holdSectionDetail(P, ROUTE, back.detail);
  state.writeState("route-draft", { nodes: [], rev: 2 }, P);
  const other = store.holdSectionDetail(P, ROUTE + 1, back.detail);
  out.next = {
    cells: JSON.stringify(fresh.cells.find(([n]) => n === "crossdesign")[1]),
    otherRoute: state.readState("route-draft-hold", P).routeId,
  };
  process.stdout.write(JSON.stringify(out));
})().catch((error) => {
  process.stderr.write(String(error && error.stack ? error.stack : error));
  process.exit(1);
});