using System;
using System.Linq;

using Jellyfin.Data.Enums;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Library;
using MediaBrowser.Controller.Playlists;
using Microsoft.Extensions.Logging;

namespace Jellyfin.Server.Migrations.Routines;

/// <summary>
/// Properly set playlist owner.
/// </summary>
internal class FixPlaylistOwner : IMigrationRoutine
{
    private readonly ILogger<RemoveDuplicateExtras> _logger;
    private readonly ILibraryManager _libraryManager;
    private readonly IPlaylistManager _playlistManager;

    public FixPlaylistOwner(
        ILogger<RemoveDuplicateExtras> logger,
        ILibraryManager libraryManager,
        IPlaylistManager playlistManager)
    {
        _logger = logger;
        _libraryManager = libraryManager;
        _playlistManager = playlistManager;
    }

    /// <inheritdoc/>
    public Guid Id => Guid.Parse("{615DFA9E-2497-4DBB-A472-61938B752C5B}");

    /// <inheritdoc/>
    public string Name => "FixPlaylistOwner";

    /// <inheritdoc/>
    public bool PerformOnNewInstall => false;

    /// <inheritdoc/>
    public void Perform()
    {
        var playlists = _libraryManager.GetItemList(new InternalItemsQuery
        {
            IncludeItemTypes = new[] { BaseItemKind.Playlist }
        })
        .Cast<Playlist>()
        .Where(x => x.OwnerUserId.Equals(Guid.Empty))
        .ToArray();

        if (playlists.Length > 0)
        {
            foreach (var playlist in playlists)
            {
                var shares = playlist.Shares;
                var firstEditShare = shares.First(x => x.CanEdit);
                if (firstEditShare is not null && Guid.TryParse(firstEditShare.UserId, out var guid))
                {
                    playlist.OwnerUserId = guid;
                    playlist.Shares = shares.Where(x => x != firstEditShare).ToArray();

                    _playlistManager.UpdatePlaylistAsync(playlist).GetAwaiter().GetResult();
                }
            }
        }
    }
}