const CELL_LOCAL_PATH_KEY = 'CELL_LOCAL_PATH__';
const CELL_LOCAL_SERVER_PATH_KEY = 'CELL_LOCAL_SERVER_PATH__';
export const CELL_LOCAL_PATH_CHANGED_EVENT = 'cell-local-path-changed';

const FILE_PROTOCOL = 'file://';

export function isValidCellLocalPath(value: string) {
  const text = String(value || '')
    .trim()
    .replace(/[\\/]+$/, '');
  if (!text) return false;
  if (text === '[object Object]') return false;
  if (text === 'null' || text === 'undefined') return false;
  if (!/\.bin$/i.test(text)) return false;
  return /^[a-zA-Z]:[\\/]/.test(text) || /^\\\\/.test(text) || text.startsWith('/') || text.startsWith(FILE_PROTOCOL);
}

function normalizePath(value: string) {
  const text = String(value || '')
    .trim()
    .replace(/[\\/]+$/, '');
  if (!isValidCellLocalPath(text)) return '';
  return text;
}

export function getCellLocalPath() {
  try {
    const serverPath = normalizePath(window.localStorage.getItem(CELL_LOCAL_SERVER_PATH_KEY) || '');
    if (serverPath) return serverPath;
    return normalizePath(window.localStorage.getItem(CELL_LOCAL_PATH_KEY) || '');
  } catch {
    return '';
  }
}

export function getManualCellLocalPath() {
  try {
    return normalizePath(window.localStorage.getItem(CELL_LOCAL_PATH_KEY) || '');
  } catch {
    return '';
  }
}

export function getServerCellLocalPath() {
  try {
    return normalizePath(window.localStorage.getItem(CELL_LOCAL_SERVER_PATH_KEY) || '');
  } catch {
    return '';
  }
}

export function setCellLocalPath(path: string) {
  const normalized = normalizePath(path);
  try {
    if (!normalized) {
      window.localStorage.removeItem(CELL_LOCAL_PATH_KEY);
      window.dispatchEvent(new CustomEvent(CELL_LOCAL_PATH_CHANGED_EVENT, { detail: '' }));
      return;
    }
    window.localStorage.setItem(CELL_LOCAL_PATH_KEY, normalized);
    window.dispatchEvent(new CustomEvent(CELL_LOCAL_PATH_CHANGED_EVENT, { detail: normalized }));
  } catch {}
}

export function clearCellLocalPath() {
  setCellLocalPath('');
}

export function setServerCellLocalPath(path: string) {
  const normalized = normalizePath(path);
  try {
    if (!normalized) {
      window.localStorage.removeItem(CELL_LOCAL_SERVER_PATH_KEY);
      window.dispatchEvent(new CustomEvent(CELL_LOCAL_PATH_CHANGED_EVENT, { detail: getCellLocalPath() }));
      return;
    }
    window.localStorage.setItem(CELL_LOCAL_SERVER_PATH_KEY, normalized);
    window.dispatchEvent(new CustomEvent(CELL_LOCAL_PATH_CHANGED_EVENT, { detail: normalized }));
  } catch {}
}