/**
 * Audiobookshelf API types. Only fields Shelfless uses are typed; unknown extras are
 * tolerated. See memory: abs-api-corrections.
 *
 * ABS returns two shapes for media:
 *  - "minified" (library item lists): metadata uses flattened strings
 *    (authorName, narratorName, seriesName).
 *  - "expanded" (single item with ?expanded=1): metadata uses arrays of objects
 *    (authors[], narrators[], series[]).
 * We model both with optional fields and read defensively via helpers in lib/media.
 */

// ── Auth ──────────────────────────────────────────────────────────────────
export type UserType = 'root' | 'admin' | 'user' | 'guest'

export interface UserPermissions {
  download: boolean
  update: boolean
  delete: boolean
  upload: boolean
  accessAllLibraries: boolean
  accessAllTags: boolean
  accessExplicitContent: boolean
  [key: string]: boolean | undefined
}

export interface AbsUser {
  id: string
  username: string
  email?: string | null
  type: UserType
  token: string
  isActive?: boolean
  isLocked?: boolean
  lastSeen?: number | null
  createdAt?: number
  permissions: UserPermissions
  librariesAccessible?: string[]
  itemTagsAccessible?: string[]
}

export interface LoginResponse {
  user: AbsUser
  userDefaultLibraryId?: string
  serverSettings?: Record<string, unknown>
  source?: string
}

export interface AuthorizeResponse {
  user: AbsUser
  userDefaultLibraryId?: string
}

export function isAdminUser(user: Pick<AbsUser, 'type'> | null | undefined): boolean {
  return user?.type === 'root' || user?.type === 'admin'
}

// ── Libraries ───────────────────────────────────────────────────────────────
export type MediaType = 'book' | 'podcast'

export interface LibraryFolder {
  id: string
  fullPath: string
  libraryId?: string
  addedAt?: number
}

export interface LibrarySettings {
  coverAspectRatio?: number
  disableWatcher?: boolean
  autoScanCronExpression?: string | null
  [key: string]: unknown
}

export interface Library {
  id: string
  name: string
  folders: LibraryFolder[]
  displayOrder: number
  icon: string
  mediaType: MediaType
  provider: string
  settings?: LibrarySettings
  createdAt: number
  lastUpdate: number
}

export interface LibrariesResponse {
  libraries: Library[]
}

export interface LibraryStats {
  totalItems?: number
  totalAuthors?: number
  totalGenres?: number
  totalDuration?: number
  totalSize?: number
  numAudioTracks?: number
  [key: string]: unknown
}

// ── Metadata / Media ─────────────────────────────────────────────────────────
export interface AuthorRef {
  id?: string
  name: string
}
export interface SeriesRef {
  id?: string
  name: string
  sequence?: string | null
}

export interface BookMetadata {
  title: string | null
  titleIgnorePrefix?: string
  subtitle?: string | null
  // expanded
  authors?: AuthorRef[]
  narrators?: string[]
  series?: SeriesRef[]
  // minified
  authorName?: string
  narratorName?: string
  seriesName?: string
  genres?: string[]
  publishedYear?: string | null
  publishedDate?: string | null
  publisher?: string | null
  description?: string | null
  isbn?: string | null
  asin?: string | null
  language?: string | null
  explicit?: boolean
}

export interface Chapter {
  id: number
  start: number
  end: number
  title: string
}

export interface AudioFileMeta {
  filename: string
  ext: string
  path: string
  relPath?: string
  size: number
}

export interface AudioFile {
  index: number
  ino: string
  metadata: AudioFileMeta
  duration: number
  bitRate?: number
  codec?: string
  channels?: number
  mimeType?: string
}

export interface Book {
  id?: string
  libraryItemId?: string
  metadata: BookMetadata
  coverPath: string | null
  tags?: string[]
  audioFiles?: AudioFile[]
  chapters?: Chapter[]
  duration?: number
  size?: number
  numTracks?: number
  numChapters?: number
  numAudioFiles?: number
  ebookFormat?: string | null
}

export interface PodcastMetadata {
  title: string | null
  author?: string | null
  description?: string | null
  releaseDate?: string | null
  genres?: string[]
  feedUrl?: string | null
  imageUrl?: string | null
  itunesId?: string | null
  itunesArtistId?: string | null
  language?: string | null
  explicit?: boolean
  type?: string | null
}

export interface PodcastEpisode {
  id: string
  index?: number
  episode?: string | null
  season?: string | null
  title: string
  subtitle?: string | null
  description?: string | null
  pubDate?: string | null
  publishedAt?: number | null
  audioFile?: AudioFile
  duration?: number
  size?: number
}

export interface Podcast {
  id?: string
  libraryItemId?: string
  metadata: PodcastMetadata
  coverPath: string | null
  tags?: string[]
  episodes?: PodcastEpisode[]
  numEpisodes?: number
  autoDownloadEpisodes?: boolean
}

export type Media = Book | Podcast

// ── Library items ─────────────────────────────────────────────────────────
export interface LibraryFile {
  ino: string
  metadata: AudioFileMeta
  fileType?: string
  addedAt?: number
  updatedAt?: number
}

export interface LibraryItem {
  id: string
  ino?: string
  libraryId: string
  folderId?: string
  path?: string
  relPath?: string
  isFile?: boolean
  mtimeMs?: number
  ctimeMs?: number
  birthtimeMs?: number
  addedAt: number
  updatedAt: number
  isMissing?: boolean
  isInvalid?: boolean
  mediaType: MediaType
  media: Media
  libraryFiles?: LibraryFile[]
  numFiles?: number
  size?: number
  // present on some list/expanded responses
  collapsedSeries?: unknown
  recentEpisode?: PodcastEpisode
  progress?: MediaProgress
}

export interface LibraryItemsResponse {
  results: LibraryItem[]
  total: number
  limit: number
  page: number
  sortBy?: string
  sortDesc?: boolean
  mediaType?: MediaType
  minified?: boolean
}

export interface LibrarySearchResult {
  book?: { libraryItem: LibraryItem; matchKey?: string; matchText?: string }[]
  podcast?: { libraryItem: LibraryItem }[]
  authors?: { id: string; name: string }[]
  series?: { series: SeriesRef; books: LibraryItem[] }[]
  tags?: string[]
}

// ── Progress & sessions ─────────────────────────────────────────────────────
export interface MediaProgress {
  id: string
  libraryItemId: string
  episodeId?: string | null
  duration: number
  progress: number // 0..1
  currentTime: number
  isFinished: boolean
  hideFromContinueListening?: boolean
  lastUpdate?: number
  startedAt?: number
  finishedAt?: number | null
}

export interface ItemsInProgressResponse {
  libraryItems: LibraryItem[]
}

export interface AudioTrack {
  index: number
  startOffset: number
  duration: number
  title?: string
  contentUrl: string
  mimeType: string
  codec?: string
  metadata?: AudioFileMeta
}

export interface PlaybackSession {
  id: string
  userId: string
  libraryId?: string
  libraryItemId: string
  episodeId?: string | null
  mediaType: MediaType
  displayTitle?: string
  displayAuthor?: string
  coverPath?: string | null
  duration: number
  playMethod?: number
  mediaPlayer?: string
  audioTracks: AudioTrack[]
  chapters?: Chapter[]
  currentTime: number
  startedAt?: number
  updatedAt?: number
}

// ── Server / admin ──────────────────────────────────────────────────────────
export interface BackupInfo {
  id: string
  backupMetadataCovers?: boolean
  fileName: string
  path?: string
  serverVersion?: string
  createdAt: number
  size?: number
}