import '../sources/source.dart';
import 'reader_direction.dart';

/// Built-in reader prefs per catalog source (used when a title has no override).
class SourceReaderDefaults {
  const SourceReaderDefaults._();

  /// ComicLand → vertical webtoon; MangaRead / MangaTown → horizontal paged.
  static ReaderMode modeFor(String sourceId) {
    switch (SourceId.tryParse(sourceId)) {
      case SourceId.mangaread:
      case SourceId.mangatown:
        return ReaderMode.paged;
      case SourceId.comicland:
      case null:
        return ReaderMode.webtoon;
    }
  }

  /// MangaRead / MangaTown → RTL; ComicLand falls back to global Settings.
  static ReadingDirection? directionFor(String sourceId) {
    switch (SourceId.tryParse(sourceId)) {
      case SourceId.mangaread:
      case SourceId.mangatown:
        return ReadingDirection.rtl;
      case SourceId.comicland:
      case null:
        return null;
    }
  }

  /// Resolve stored title mode, else [modeFor].
  static ReaderMode resolveMode(String sourceId, String? storedMode) {
    final raw = storedMode?.trim() ?? '';
    if (raw == 'paged' || raw == 'webtoon') {
      return ReaderMode.fromStorage(raw);
    }
    return modeFor(sourceId);
  }

  /// Resolve stored title direction, else [directionFor], else [globalFallback].
  static ReadingDirection resolveDirection(
    String sourceId,
    String? storedDirection, {
    required ReadingDirection globalFallback,
  }) {
    final raw = storedDirection?.trim() ?? '';
    if (raw == 'ltr' || raw == 'rtl') {
      return ReadingDirection.fromStorage(raw);
    }
    return directionFor(sourceId) ?? globalFallback;
  }
}