/* PLAN 445 헬퍼 — [저장] 횡단 patch 바탕 · 세션 얹음 · 되돌림 · 옮긴 측점 입력.
 * 조정창(`createStationControls`)으로 고친 뒤 횡단 보기 [저장] 본문(`buildCrossPatches` → `cachedCrossPatches`)을
 * 그대로 만들어 내놓음 — 시험이 서버 병합(`_apply_section_edits` → `merge_cross_section_design_batches`)에 넣어
 * DB 설계를 견줌. TS 는 그 자리에서 트랜스파일 · 화면 · 서버 창구는 가짜. 짝 = `test_445_save_patch.py`.
 *   node helper_445_save_patch.cjs <job.json>
 */
const fs = require("fs");
const path = require("path");
const ts = require(path.join(__dirname, "..", "..", "config", "node_modules", "typescript"));

const ROOT = path.join(__dirname, "..", "..");
const B06 = (name) => path.join(ROOT, "B06_Section", `${name}.ts`);

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

const anything = () =>
  new Proxy({}, { get: (_target, key) => (key === "__esModule" ? false : () => undefined) });

function makeLoader(real, stubs = {}) {
  const cache = new Map();
  const realSet = new Set(real.map((file) => path.resolve(file)));
  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 need = (spec) => {
      if (spec in stubs) return stubs[spec];
      let target = null;
      if (spec.startsWith("@util/")) target = path.join(ROOT, "common_util", `${spec.slice(6)}.ts`);
      else if (spec.startsWith(".")) target = path.join(path.dirname(full), `${spec}.ts`);
      if (target && realSet.has(path.resolve(target))) return load(target);
      return anything();
    };
    new Function("exports", "module", "require", js)(box.exports, box, need);
    return box.exports;
  };
  return load;
}

const bodyStub = () => ({
  control: { selectedFor: () => false, select: () => undefined },
  byChainage: () => new Map(),
  load: () => undefined,
});
const load = makeLoader(
  [
    B06("B06_Section_Section_Store"),
    B06("B06_Section_Section_Canon"),
    B06("B06_Section_Section_Adjusts"),
    B06("B06_Section_Cross_Refresh"),
    B06("B06_Section_Api_Culvert_Options"),
    B06("B06_Section_UI_Page_Station_Controls"),
    B06("B06_Section_UI_Page_Link_Session"),
    B06("B06_Section_UI_Cross_Culvert_Types"),
    B06("logic/B06_Section_Station_Swap"),
    B06("logic/B06_Section_UI_Page_Patches"),
    path.join(ROOT, "A00_Common", "b_page_state.ts"),
    path.join(ROOT, "A00_Common", "design", "design_selection.ts"),
  ],
  {
    "./B06_Section_Api_Fetch": {
      fetchSectionDetail: async () => job.detail,
      saveSections: async () => ({}),
    },
    "./B06_Section_UI_Page_Ford_Controls": {
      createBodyControls: () => ({ ford: bodyStub(), box: bodyStub() }),
    },
    "./B06_Section_UI_Page_Span_Control": {
      createSpanControl: () => ({
        control: {},
        spanKeyOf: (chainageM, wall) => `${chainageM.toFixed(2)}:${wall}`,
      }),
    },
    "./B06_Section_Section_Drafts": {
      withDraftStations: async () => undefined,
      withDraftShapes: async () => undefined,
      forgetDraftStations: () => undefined,
      supersedeDraftStations: () => undefined,
    },
    "./B06_Section_Structure_Layouts": {
      applyStructureAreaRows: () => undefined,
      structureAreaRows: () => [],
      computeStoredLayouts: () => null,
    },
    "../B05_Profile/B05_Profile_Api_PlusStations": {
      loadSavedPlusStations: async () => undefined,
      plusStationsOf: () => [],
    },
  },
);

const job = JSON.parse(fs.readFileSync(process.argv[2], "utf8"));
const P = "p445";
const R = 7;
const { stateKey } = load(path.join(ROOT, "A00_Common", "b_page_state.ts"));
const store = load(B06("B06_Section_Section_Store"));
const { buildCrossPatches } = load(B06("logic/B06_Section_UI_Page_Patches"));
const { createStationControls } = load(B06("B06_Section_UI_Page_Station_Controls"));

/** 새 탭 = 빈 세션 · 서버 상세(정본) 받아 캐시에 · 조정창 하나. */
async function freshTab(clearSession = true) {
  if (clearSession) globalThis.sessionStorage.clear();
  store.invalidateSectionDetail(P, R);
  const detail = await store.loadSectionDetail(P, R);
  const controls = createStationControls({
    sessionKey: (kind) => stateKey(kind, P, R),
    refreshCard: () => undefined,
    detail: () => detail,
    crossHalfWidth: () => undefined,
    sampledHalfWidth: () => 20,
    ensureSampledWidth: async () => true,
    projectId: () => P,
  });
  controls.load();
  return { detail, controls };
}

/** 횡단 보기 [저장] 본문 — 세션 고침(`buildCrossPatches`) → 바탕 위에 얹음(`cachedCrossPatches`). */
function savePatches(controls) {
  const overlay = buildCrossPatches({
    rockOffsets: new Map(),
    cutSlopeRatios: new Map(),
    stationWidths: controls.widths,
    inletStructures: controls.inletStructures,
    basinAdjustments: controls.basinAdjustments,
    revetAdjusts: controls.revetAdjustsByChainage(),
    extraCounts: controls.extraCountsByChainage(),
    extraSpans: controls.extraSpansByChainage(),
    fordAdjusts: new Map(),
    boxAdjusts: new Map(),
    linkFlags: controls.linkFlagsByChainage(),
  });
  return { overlay, patches: store.cachedCrossPatches(P, R, overlay) };
}

(async () => {
  const at = job.at;
  const out = {};

  // H3 — 유출만 고침 → 유입 · 집수 쪽 단 수 남음
  {
    const { controls } = await freshTab();
    controls.revetOffset.update(at, "outlet", { x: 3 });
    out.h3 = savePatches(controls);
  }
  // M2 — 새 탭 ↺(유입) · 추가 벽 − · 빈 전체 폭 · 집수정 내공 2.1(M1)
  {
    const { controls } = await freshTab();
    controls.revetOffset.reset(at, "inlet");
    controls.extraWalls.setCount(at, 0, "outlet");
    controls.applyGlobalWidth(undefined, [at]);
    controls.inletStructure.updateAdjust(at, { innerWidthM: 2.1, innerHeightM: 0.5 });
    out.m2 = savePatches(controls);
    out.m2.countShown = controls.extraWalls.countFor({ chainage_m: at, design: {} }, "outlet");
    // 저장 전 새로고침(세션은 남고 상세는 정본) — 되돌림이 살아 있어야 함
    const again = await freshTab(false);
    out.m2reload = savePatches(again.controls);
    out.m2reload.cachedInlet = again.detail.cross_sections[0].design.revet_adjust?.inlet ?? null;
    out.m2reload.cachedCounts = again.detail.cross_sections[0].design.extra_wall_counts ?? null;
  }
  // H2 — 정본 행이 없는 자리(옮긴 관)의 캐시 설계 = 지반 등 입력까지 실음
  {
    globalThis.sessionStorage.clear();
    store.invalidateSectionDetail(P, R);
    await store.loadSectionDetail(P, R); // 정본 = job.detail(at 한 측점)
    const moved = await store.loadSectionDetail(P, R);
    moved.cross_sections.push({ ...job.moved });
    out.h2 = store.cachedCrossPatches(P, R, []);
    moved.cross_sections.pop();
  }
  process.stdout.write(JSON.stringify(out));
})().catch((error) => {
  process.stderr.write(String(error?.stack ?? error));
  process.exit(1);
});