import { ItemsKeyInterface } from '@standardnotes/models'

export function findDefaultItemsKey(itemsKeys: ItemsKeyInterface[]): ItemsKeyInterface | undefined {
  if (itemsKeys.length === 1) {
    return itemsKeys[0]
  }

  const defaultKeys = itemsKeys.filter((key) => {
    return key.isDefault
  })

  if (defaultKeys.length === 0) {
    return undefined
  }

  if (defaultKeys.length === 1) {
    return defaultKeys[0]
  }

  /**
   * Prioritize one that is synced, as neverSynced keys will likely be deleted after
   * DownloadFirst sync.
   */
  const syncedKeys = defaultKeys.filter((key) => !key.neverSynced)
  if (syncedKeys.length > 0) {
    return syncedKeys[0]
  }

  return undefined
}