/**
 * [파일 역할]
 * KIS 설정 화면의 "기억하기" 항목(localStorage) 키와 읽기/쓰기 유틸을 관리합니다.
 *
 * [주요 책임]
 * - 앱키/앱시크릿키/계좌번호의 기억하기 체크 상태 저장
 * - 기억하기 값 저장/조회/삭제
 * - 로그아웃/세션만료 시 일괄 정리할 키 목록 제공
 */

export type KisRememberField = "appKey" | "appSecret" | "accountNo";

const KIS_REMEMBER_ENABLED_KEY_MAP = {
  appKey: "autotrade-kis-remember-app-key-enabled",
  appSecret: "autotrade-kis-remember-app-secret-enabled",
  accountNo: "autotrade-kis-remember-account-no-enabled",
} as const;

const KIS_REMEMBER_VALUE_KEY_MAP = {
  appKey: "autotrade-kis-remember-app-key",
  appSecret: "autotrade-kis-remember-app-secret",
  accountNo: "autotrade-kis-remember-account-no",
} as const;

export const KIS_REMEMBER_LOCAL_STORAGE_KEYS = [
  ...Object.values(KIS_REMEMBER_ENABLED_KEY_MAP),
  ...Object.values(KIS_REMEMBER_VALUE_KEY_MAP),
] as const;

function getBrowserLocalStorage() {
  if (typeof window === "undefined") {
    return null;
  }

  return window.localStorage;
}

function readLocalStorage(key: string) {
  const storage = getBrowserLocalStorage();
  if (!storage) {
    return "";
  }

  return storage.getItem(key) ?? "";
}

function writeLocalStorage(key: string, value: string) {
  const storage = getBrowserLocalStorage();
  if (!storage) {
    return;
  }

  storage.setItem(key, value);
}

function removeLocalStorage(key: string) {
  const storage = getBrowserLocalStorage();
  if (!storage) {
    return;
  }

  storage.removeItem(key);
}

export function isKisRememberEnabled(field: KisRememberField) {
  return readLocalStorage(KIS_REMEMBER_ENABLED_KEY_MAP[field]) === "1";
}

export function setKisRememberEnabled(field: KisRememberField, enabled: boolean) {
  const enabledKey = KIS_REMEMBER_ENABLED_KEY_MAP[field];
  if (enabled) {
    writeLocalStorage(enabledKey, "1");
    return;
  }

  removeLocalStorage(enabledKey);
  removeLocalStorage(KIS_REMEMBER_VALUE_KEY_MAP[field]);
}

export function getRememberedKisValue(field: KisRememberField) {
  return readLocalStorage(KIS_REMEMBER_VALUE_KEY_MAP[field]);
}

export function setRememberedKisValue(field: KisRememberField, value: string) {
  const normalized = value.trim();
  const valueKey = KIS_REMEMBER_VALUE_KEY_MAP[field];

  if (!normalized) {
    removeLocalStorage(valueKey);
    return;
  }

  writeLocalStorage(valueKey, normalized);
}