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using System;
using System.Globalization;
using System.Threading.Tasks;
using Jellyfin.Database.Implementations.Entities;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Entities.Audio;
using MediaBrowser.Controller.Events;
using MediaBrowser.Controller.Subtitles;
using MediaBrowser.Model.Activity;
using MediaBrowser.Model.Globalization;
using Episode = MediaBrowser.Controller.Entities.TV.Episode;

namespace Jellyfin.Server.Implementations.Events.Consumers.Library
{
    /// <summary>
    /// Creates an entry in the activity log whenever a subtitle download fails.
    /// </summary>
    public class SubtitleDownloadFailureLogger : IEventConsumer<SubtitleDownloadFailureEventArgs>
    {
        private readonly ILocalizationManager _localizationManager;
        private readonly IActivityManager _activityManager;

        /// <summary>
        /// Initializes a new instance of the <see cref="SubtitleDownloadFailureLogger"/> class.
        /// </summary>
        /// <param name="localizationManager">The localization manager.</param>
        /// <param name="activityManager">The activity manager.</param>
        public SubtitleDownloadFailureLogger(ILocalizationManager localizationManager, IActivityManager activityManager)
        {
            _localizationManager = localizationManager;
            _activityManager = activityManager;
        }

        /// <inheritdoc />
        public async Task OnEvent(SubtitleDownloadFailureEventArgs eventArgs)
        {
            await _activityManager.CreateAsync(new ActivityLog(
                string.Format(
                    CultureInfo.InvariantCulture,
                    _localizationManager.GetLocalizedString("SubtitleDownloadFailureFromForItem"),
                    eventArgs.Provider,
                    GetItemName(eventArgs.Item)),
                "SubtitleDownloadFailure",
                Guid.Empty)
            {
                ItemId = eventArgs.Item.Id.ToString("N", CultureInfo.InvariantCulture),
                ShortOverview = eventArgs.Exception.Message
            }).ConfigureAwait(false);
        }

        private static string GetItemName(BaseItem item)
        {
            var name = item.Name;
            if (item is Episode episode)
            {
                if (episode.IndexNumber.HasValue)
                {
                    name = string.Format(
                        CultureInfo.InvariantCulture,
                        "Ep{0} - {1}",
                        episode.IndexNumber.Value,
                        name);
                }

                if (episode.ParentIndexNumber.HasValue)
                {
                    name = string.Format(
                        CultureInfo.InvariantCulture,
                        "S{0}, {1}",
                        episode.ParentIndexNumber.Value,
                        name);
                }
            }

            if (item is IHasSeries hasSeries)
            {
                name = hasSeries.SeriesName + " - " + name;
            }

            if (item is IHasAlbumArtist hasAlbumArtist)
            {
                var artists = hasAlbumArtist.AlbumArtists;

                if (artists.Count > 0)
                {
                    name = artists[0] + " - " + name;
                }
            }
            else if (item is IHasArtist hasArtist)
            {
                var artists = hasArtist.Artists;

                if (artists.Count > 0)
                {
                    name = artists[0] + " - " + name;
                }
            }

            return name;
        }
    }
}