import 'package:freezed_annotation/freezed_annotation.dart';

import '../channels/channel_id.dart';
import '../common/common.dart';
import '../reverse_engineering/pages/watch_page.dart';
import 'video_id.dart';

part 'video.freezed.dart';

/// YouTube video metadata.
@freezed
class Video with _$Video {
  /// Video URL.
  String get url => 'https://www.youtube.com/watch?v=$id';

  /// Returns true if the watch page is available for this video.
  bool get hasWatchPage => watchPage != null;

  factory Video(

      /// Video ID.
      VideoId id,

      /// Video title.
      String title,

      /// Video author.
      String author,

      /// Video author Id.
      ChannelId channelId,

      /// Video upload date.
      /// Note: For search queries it is calculated with:
      ///   DateTime.now() - how much time is was published.
      DateTime? uploadDate,

      /// Video publish date.
      DateTime? publishDate,

      /// Video description.
      String description,

      /// Duration of the video.
      Duration? duration,

      /// Available thumbnails for this video.
      ThumbnailSet thumbnails,

      /// Search keywords used for this video.
      Iterable<String>? keywords,

      /// Engagement statistics for this video.
      Engagement engagement,

      /// Returns true if this is a live stream.
      //ignore: avoid_positional_boolean_parameters
      bool isLive,
      [

      /// Used internally.
      /// Shouldn't be used in the code.
      @internal WatchPage? watchPage]) {
    return Video._internal(

        /// Video ID.
        id,

        /// Video title.
        title,

        /// Video author.
        author,

        /// Video author Id.
        channelId,

        /// Video upload date.
        /// Note: For search queries it is calculated with:
        ///   DateTime.now() - how much time is was published.
        uploadDate,

        /// Video publish date.
        publishDate,
        description,
        duration,
        thumbnails,
        UnmodifiableListView(keywords ?? const Iterable.empty()),
        engagement,
        isLive,
        watchPage);
  }

  /// Initializes an instance of [Video]
  const factory Video._internal(

      /// Video ID.
      VideoId id,

      /// Video title.
      String title,

      /// Video author.
      String author,

      /// Video author Id.
      ChannelId channelId,

      /// Video upload date.
      /// Note: For search queries it is calculated with:
      ///   DateTime.now() - how much time is was published.
      DateTime? uploadDate,

      /// Video publish date.
      DateTime? publishDate,

      /// Video description.
      String description,

      /// Duration of the video.
      Duration? duration,

      /// Available thumbnails for this video.
      ThumbnailSet thumbnails,

      /// Search keywords used for this video.
      UnmodifiableListView<String> keywords,

      /// Engagement statistics for this video.
      Engagement engagement,

      /// Returns true if this is a live stream.
      //ignore: avoid_positional_boolean_parameters
      bool isLive,
      [

      /// Used internally.
      /// Shouldn't be used in the code.
      @internal WatchPage? watchPage]) = _Video;

  const Video._();
}