/* 346-4 떠남 확인 단위검증 헬퍼 — `A00_Common/design/design_leave.ts` 를 그 자리에서 트랜스파일 ·
 * `b_page_state` 는 진짜 · 라우터 · 물음 창 · 문구는 흉내. 결과 JSON 을 stdout 으로.
 */
const fs = require("fs");
const path = require("path");
const ts = require(path.join(__dirname, "..", "..", "config", "node_modules", "typescript"));

const ROOT = path.join(__dirname, "..", "..");

function memoryStorage() {
  const map = new Map();
  return {
    getItem: (key) => (map.has(key) ? map.get(key) : null),
    setItem: (key, value) => map.set(key, String(value)),
    removeItem: (key) => map.delete(key),
    clear: () => map.clear(),
    key: (index) => [...map.keys()][index] ?? null,
    get length() {
      return map.size;
    },
  };
}
const session = memoryStorage();
const win = new EventTarget();
win.sessionStorage = session;
win.localStorage = memoryStorage();
win.setTimeout = setTimeout;
globalThis.window = win;
globalThis.sessionStorage = session;

let route = "/b05-profile";
let guard = null;
let guardSets = 0;
let choice = "cancel";
const asked = [];
const STUBS = {
  "@config/config_frontend": {
    ROUTES: { B05_PROFILE: "/b05-profile", B06_SECTION: "/b06-section" },
  },
  "@ui/ui_template_locale": { t: (key) => key },
  "@ui/ui_template_leave_dialog": {
    leaveOrStay: async (message, hooks) => {
      asked.push(message);
      if (choice === "cancel") return "stay";
      if (choice === "discard") {
        await hooks.discard();
        return "discarded";
      }
      await hooks.save();
      return hooks.stillDirty() ? "stay" : "saved";
    },
  },
  "../router": {
    currentRoute: () => route,
    setLeaveGuard: (fn) => {
      guard = fn;
      guardSets += 1;
    },
  },
};

function loadTs(file) {
  const js = ts.transpileModule(fs.readFileSync(file, "utf8"), {
    compilerOptions: { module: ts.ModuleKind.CommonJS, target: ts.ScriptTarget.ES2020 },
  }).outputText;
  const box = { exports: {} };
  const localRequire = (request) => {
    if (request in STUBS) return STUBS[request];
    if (request.startsWith(".")) return loadTs(path.join(path.dirname(file), `${request}.ts`));
    return require(request);
  };
  new Function("exports", "module", "require", js)(box.exports, box, localRequire);
  return box.exports;
}

const leave = loadTs(path.join(ROOT, "A00_Common", "design", "design_leave.ts"));
const P = "p1";
const tick = () => new Promise((resolve) => setTimeout(resolve, 5));
/** 브라우저 BeforeUnloadEvent 처럼 returnValue 를 쓸 수 있게. */
class BeforeUnload extends Event {
  returnValue = true;
}
const unloadBlocked = () => {
  const event = new BeforeUnload("beforeunload", { cancelable: true });
  win.dispatchEvent(event);
  return event.defaultPrevented;
};

(async () => {
  const out = {};
  const root = { isConnected: true };
  let saveMarks = true;
  let saves = 0;
  leave.guardDesignLeave(P, root, async () => {
    saves += 1;
    if (saveMarks) leave.markDesignClean(P);
  });

  out.emptyDirty = leave.designDirty(P);
  // 고침이 아닌 칸 · 다른 페이지 칸 · 표준 횡단면만 — 안 물음
  session.setItem(`aislo:draft:selection:${P}`, '{"chainageM":20}');
  session.setItem(`aislo:draft:std-cross:${P}`, '{"soil":{}}');
  session.setItem(`aislo:draft:pipe-ids:${P}`, '{"next":3}');
  session.setItem(`aislo:draft:b08-materials:${P}`, '{"units":1}');
  session.setItem(`aislo:draft:crossdesign:${P}:7`, "{}"); // 빈 칸
  out.nonEditDirty = leave.designDirty(P);
  out.nonEditUnload = unloadBlocked();
  route = "/b08-quantity";
  out.nonEditLeave = await guard();
  out.askedNonEdit = asked.length;

  // 횡단 초안(노선 7) — 물음
  session.setItem(`aislo:draft:crossdesign:${P}:7`, '{"20.000":{"ground_type":"soil"}}');
  out.editDirty = leave.designDirty(P);
  out.editUnload = unloadBlocked();

  // 같은 페이지(B05 → B06) — 안 묻고 한 틱 뒤 다시 걺
  route = "/b06-section";
  const setsBefore = guardSets;
  out.samePage = await guard();
  await tick();
  out.reArmed = guardSets === setsBefore + 1;
  out.askedSamePage = asked.length;

  // 다른 페이지 — 취소 = 머묾
  route = "/b08-quantity";
  choice = "cancel";
  out.cancelLeave = await guard();

  // 저장 실패(깨끗한 표 없음) = 머묾 · 저장 성공 = 넘어감 · 뒤로 안 물음
  choice = "save";
  saveMarks = false;
  out.saveFailLeave = await guard();
  saveMarks = true;
  out.saveLeave = await guard();
  out.saves = saves;
  out.afterSaveDirty = leave.designDirty(P);
  out.afterSaveUnload = unloadBlocked();
  const askedAfterSave = asked.length;
  out.afterSaveLeave = await guard();
  out.askedAfterSave = asked.length - askedAfterSave;

  // 저장 뒤 다시 고침 — 다시 물음 · 버리고 넘어감 = 고침 칸만 지움
  session.setItem(`aislo:draft:alignment-draft:${P}:7`, '{"station_offsets":{"20.000":0.3}}');
  session.setItem(`aislo:draft:route-draft:${P}`, '{"rev":2}');
  out.reEditDirty = leave.designDirty(P);
  choice = "discard";
  out.discardLeave = await guard();
  out.left = {
    crossdesign: session.getItem(`aislo:draft:crossdesign:${P}:7`),
    alignment: session.getItem(`aislo:draft:alignment-draft:${P}:7`),
    routeDraft: session.getItem(`aislo:draft:route-draft:${P}`),
    selection: session.getItem(`aislo:draft:selection:${P}`),
    stdCross: session.getItem(`aislo:draft:std-cross:${P}`),
    b08: session.getItem(`aislo:draft:b08-materials:${P}`),
  };
  out.afterDiscardDirty = leave.designDirty(P);

  // 페이지가 화면에서 빠짐 — 안 물음
  session.setItem(`aislo:draft:crossdesign:${P}:7`, '{"40.000":{}}');
  root.isConnected = false;
  const askedGone = asked.length;
  out.goneLeave = await guard();
  out.goneUnload = unloadBlocked();
  out.askedGone = asked.length - askedGone;
  process.stdout.write(JSON.stringify(out));
})();