const STORAGE_KEYS = Object.freeze({
  developerTools: 'shine-feature-developer-tools-v1',
  dmFileTransfer: 'shine-feature-dm-file-transfer-v1',
});

function readBoolean(key, defaultValue = true) {
  try {
    const raw = localStorage.getItem(key);
    if (raw == null) return Boolean(defaultValue);
    return raw !== '0' && raw !== 'false';
  } catch {
    return Boolean(defaultValue);
  }
}

function writeBoolean(key, enabled) {
  const value = Boolean(enabled);
  try {
    localStorage.setItem(key, value ? '1' : '0');
  } catch {
    // В приватном режиме/при запрете storage оставляем значение только на уровне default.
  }
  window.dispatchEvent(new CustomEvent('shine-feature-settings-updated', {
    detail: { key, enabled: value },
  }));
  return value;
}

export function isDeveloperToolsEnabled() {
  return readBoolean(STORAGE_KEYS.developerTools, true);
}

export function setDeveloperToolsEnabled(enabled) {
  return writeBoolean(STORAGE_KEYS.developerTools, enabled);
}

export function isDmFileTransferEnabled() {
  return readBoolean(STORAGE_KEYS.dmFileTransfer, true);
}

export function setDmFileTransferEnabled(enabled) {
  return writeBoolean(STORAGE_KEYS.dmFileTransfer, enabled);
}