import {
  AUDIO_FORMATS,
  VIDEO_CONTAINERS,
  VIDEO_CODECS,
  SPONSORBLOCK_CATEGORIES,
  DEFAULT_DOWNLOAD_OPTIONS,
  type DownloadOptions,
  type SponsorBlockCategory,
  type AudioFormat,
  type VideoContainer,
  type VideoCodecPref
} from '@shared/ipc'

// Coerce an untrusted partial into a valid DownloadOptions, falling back to the
// defaults for any missing/invalid field. Used both to migrate older settings
// files (which predate downloadOptions) and to validate renderer writes. Lives
// in its own module (not settings.ts) so the settings field schemas (CC9) can
// reuse it without an import cycle.
export function sanitizeOptions(input: unknown): DownloadOptions {
  const o = (input && typeof input === 'object' ? input : {}) as Partial<DownloadOptions>
  const d = DEFAULT_DOWNLOAD_OPTIONS
  const bool = (v: unknown, fallback: boolean): boolean => (typeof v === 'boolean' ? v : fallback)
  const cats = Array.isArray(o.sponsorBlockCategories)
    ? (o.sponsorBlockCategories.filter((c) =>
        (SPONSORBLOCK_CATEGORIES as readonly string[]).includes(c)
      ) as SponsorBlockCategory[])
    : d.sponsorBlockCategories
  return {
    audioFormat: (AUDIO_FORMATS as readonly string[]).includes(o.audioFormat as string)
      ? (o.audioFormat as AudioFormat)
      : d.audioFormat,
    videoContainer: (VIDEO_CONTAINERS as readonly string[]).includes(o.videoContainer as string)
      ? (o.videoContainer as VideoContainer)
      : d.videoContainer,
    preferredVideoCodec: (VIDEO_CODECS as readonly string[]).includes(
      o.preferredVideoCodec as string
    )
      ? (o.preferredVideoCodec as VideoCodecPref)
      : d.preferredVideoCodec,
    formatSort: typeof o.formatSort === 'string' ? o.formatSort.trim() : d.formatSort,
    embedSubtitles: bool(o.embedSubtitles, d.embedSubtitles),
    subtitleLanguages:
      typeof o.subtitleLanguages === 'string' && o.subtitleLanguages.trim()
        ? o.subtitleLanguages.trim()
        : d.subtitleLanguages,
    autoSubtitles: bool(o.autoSubtitles, d.autoSubtitles),
    sponsorBlock: bool(o.sponsorBlock, d.sponsorBlock),
    sponsorBlockMode: o.sponsorBlockMode === 'mark' ? 'mark' : 'remove',
    sponsorBlockCategories: cats,
    embedChapters: bool(o.embedChapters, d.embedChapters),
    splitChapters: bool(o.splitChapters, d.splitChapters),
    embedMetadata: bool(o.embedMetadata, d.embedMetadata),
    metadataTitle: typeof o.metadataTitle === 'string' ? o.metadataTitle : undefined,
    metadataArtist: typeof o.metadataArtist === 'string' ? o.metadataArtist : undefined,
    metadataAlbum: typeof o.metadataAlbum === 'string' ? o.metadataAlbum : undefined,
    embedThumbnail: bool(o.embedThumbnail, d.embedThumbnail),
    cropThumbnail: bool(o.cropThumbnail, d.cropThumbnail),
    writeInfoJson: bool(o.writeInfoJson, d.writeInfoJson),
    writeThumbnailFile: bool(o.writeThumbnailFile, d.writeThumbnailFile),
    writeDescription: bool(o.writeDescription, d.writeDescription)
  }
}