import Foundation

typealias ServerLibraryError = EncryptedFileError

/// 服务器库专用载荷与密钥空间；使用标准 age 文件。
final class ServerLibraryStorage {
  private let encrypted: EncryptedFileStorage<CatalogDocument>

  init(keys: CredentialKeyStoring = KeychainCredentialKeyStore(namespace: "server-library.age")) {
    encrypted = EncryptedFileStorage(
      keys: keys, maximumSize: 64 * 1024 * 1024,
      legacyFileNames: ["catalog.enc", "catalog.json"], makeDefault: { CatalogDocument() },
      encode: CatalogFileStore.encode, decode: CatalogFileStore.decode)
  }

  func load(at url: URL, allowingInteraction: Bool) throws -> CatalogDocument {
    try encrypted.load(at: url, allowingInteraction: allowingInteraction)
  }

  func save(_ document: CatalogDocument, at url: URL) throws {
    try encrypted.save(document, at: url)
  }

  func reset(at url: URL) throws -> CatalogDocument {
    try encrypted.reset(at: url)
  }
}