import 'package:freezed_annotation/freezed_annotation.dart';
import 'package:worldhopper/models/opds_link.dart';
import 'package:worldhopper/models/opds_stream_link.dart';

part 'opds_entry.freezed.dart';
part 'opds_entry.g.dart';

/// Represents an entry in an OPDS feed (a publication or collection)
@freezed
class OPDSEntry with _$OPDSEntry {
  const factory OPDSEntry({
    /// Unique identifier for the entry
    required String id,

    /// Entry title
    required String title,

    /// Entry summary/description
    String? summary,

    /// Entry content (HTML description)
    String? content,

    /// Publication date
    DateTime? published,

    /// Last update date
    DateTime? updated,

    /// Authors
    @Default([]) List<String> authors,

    /// Categories/tags
    @Default([]) List<String> categories,

    /// All links associated with this entry
    @Default([]) List<OPDSLink> links,

    /// PSE stream link (if available)
    OPDSStreamLink? streamLink,

    /// Cover image URL
    String? coverUrl,

    /// Thumbnail image URL
    String? thumbnailUrl,
  }) = _OPDSEntry;

  const OPDSEntry._();

  /// Create OPDSEntry from JSON
  factory OPDSEntry.fromJson(Map<String, dynamic> json) =>
      _$OPDSEntryFromJson(json);

  /// Check if this entry has a stream link (can be read page by page)
  bool get hasStreamLink => streamLink != null;

  /// Check if this entry is a navigation entry (leads to another feed)
  bool get isNavigation => links.any(
        (link) => link.rel == 'subsection' || link.rel.contains('navigation'),
      );

  /// Get the acquisition link (for download or reading)
  OPDSLink? get acquisitionLink => links.firstWhere(
        (link) =>
            link.rel.contains('acquisition') || link.rel.contains('open-access'),
        orElse: () => links.first,
      );

  /// Get the self link
  OPDSLink? get selfLink => links.cast<OPDSLink?>().firstWhere(
        (link) => link?.rel == 'self',
        orElse: () => null,
      );

  /// Check if this entry is an EPUB publication
  bool get isEpub {
    final link = acquisitionLink;
    if (link == null) return false;
    return link.type?.toLowerCase().contains('epub') ?? false;
  }

  /// Check if this entry is an image stream (comic/manga)
  bool get isImageStream => hasStreamLink;
}