/* PLAN 443 단위검증 헬퍼 — 저장 누락 ① (H6 · M3 · M6).
 *   H6 구조물 저장 실패(409 · 그 밖) = 던짐 · 초안 남음 · 다음 [저장]이 줄에 안 막힘
 *   M3 상단측 차례 성공 = uphill 세션 비움 · 실패 = 그대로
 *   M6 확정 응답 failed_parts = 던짐(그 차례에서 멈춤)
 * TS 를 그 자리에서 트랜스파일해 Node 로 돌림 · 서버 창구는 가짜. 짝 = `test_443_save_stops.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 = { setTimeout, clearTimeout };

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

function load(file, stubs) {
  const js = ts.transpileModule(fs.readFileSync(file, "utf8"), {
    compilerOptions: { module: ts.ModuleKind.CommonJS, target: ts.ScriptTarget.ES2020 },
  }).outputText;
  const box = { exports: {} };
  new Function("exports", "module", "require", js)(box.exports, box, (r) => stubs[r] ?? anything());
  return box.exports;
}

const settle = (promise) =>
  promise.then(
    () => "ok",
    (error) => String(error.message),
  );

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

  // ── H6 구조물 ──
  class StructureConflictError extends Error {}
  let pending = [{ structure_id: "s1" }];
  let mode = "conflict";
  const puts = [];
  const bridgeMod = load(path.join(ROOT, "B05_Profile", "B05_Profile_UI_Page_Structures.ts"), {
    "./B05_Profile_Api_Structures": {
      StructureConflictError,
      fetchStructures: async () => ({ revision: 3, structures: [] }),
      saveStructures: async (_p, revision, list) => {
        puts.push(revision);
        if (mode === "conflict") throw new StructureConflictError("409");
        if (mode === "boom") throw new Error("서버 500");
        return { revision: revision + 1 };
      },
      readPendingStructures: () => pending,
      writePendingStructures: (_p, next) => (pending = next),
      definitionStale: () => false,
      staleDefinitionNotice: () => null,
    },
    "@ui/ui_template_elements": { showToast: () => undefined },
  });
  const quiet = new Proxy({}, { get: () => () => undefined });
  const bridge = bridgeMod.createStructuresBridge({
    projectId: "p1",
    panel: () => ({ structures: quiet, values: () => ({}) }),
    lane: quiet, // 시설 줄 한 벌(462)
    isRestoring: () => false,
  });
  out.conflict = await settle(bridge.saveStructuresIfDirty());
  out.pendingAfterConflict = pending;
  mode = "boom";
  out.boom = await settle(bridge.saveStructuresIfDirty()); // 앞 실패에 줄이 안 막힘
  out.pendingAfterBoom = pending;
  mode = "ok";
  out.ok = await settle(bridge.saveStructuresIfDirty());
  out.pendingAfterOk = pending;
  out.puts = puts;

  // ── M3 · M6 상단측 · 확정 하위 ──
  const state = new Map();
  let reply = {};
  const bodies = [];
  globalThis.fetch = async (_url, init) => {
    bodies.push(JSON.parse(init.body));
    return { ok: true, json: async () => reply };
  };
  const api = load(path.join(ROOT, "B05_Profile", "B05_Profile_Api_Fetch.ts"), {
    "../A00_Common/b_page_state": {
      readState: (name, p) => state.get(`${name}:${p}`) ?? null,
      writeState: (name, value, p) => state.set(`${name}:${p}`, value),
      clearState: (name, p) => state.delete(`${name}:${p}`),
    },
    "@config/config_frontend": { API_BASE_URL: "", API_TIMEOUT_MS: 1000 },
  });
  state.set("uphill:p1", { "40.000": "right" });
  reply = { failed_parts: ["상단측 병합"] };
  out.flushFailed = await settle(api.flushUphillOverrides("p1"));
  out.uphillAfterFail = state.get("uphill:p1") ?? null;
  reply = { failed_parts: [] };
  out.flushOk = await settle(api.flushUphillOverrides("p1"));
  out.uphillAfterOk = state.get("uphill:p1") ?? null;
  out.sentAgain = await settle(api.flushUphillOverrides("p1")); // 비었으니 안 보냄
  out.bodies = bodies;
  reply = { failed_parts: ["비정규 측점 횡단"] };
  out.partsFailed = await settle(api.saveRouteParts("p1", { irregular_stations: [] }));
  return out;
}

run().then(
  (out) => process.stdout.write(JSON.stringify(out)),
  (error) => {
    process.stderr.write(String(error.stack ?? error));
    process.exit(1);
  },
);