using System;
using MediaBrowser.Controller.Entities;
using MediaBrowser.Controller.Sorting;
using MediaBrowser.Model.Querying;

namespace Emby.Server.Implementations.Sorting
{
    public class GameSystemComparer : IBaseItemComparer
    {
        /// <summary>
        /// Compares the specified x.
        /// </summary>
        /// <param name="x">The x.</param>
        /// <param name="y">The y.</param>
        /// <returns>System.Int32.</returns>
        public int Compare(BaseItem x, BaseItem y)
        {
            return string.Compare(GetValue(x), GetValue(y), StringComparison.CurrentCultureIgnoreCase);
        }

        /// <summary>
        /// Gets the value.
        /// </summary>
        /// <param name="x">The x.</param>
        /// <returns>System.String.</returns>
        private static string GetValue(BaseItem x)
        {
            var game = x as Game;

            if (game != null)
            {
                return game.GameSystem;
            }

            var system = x as GameSystem;

            if (system != null)
            {
                return system.GameSystemName;
            }

            return string.Empty;
        }

        /// <summary>
        /// Gets the name.
        /// </summary>
        /// <value>The name.</value>
        public string Name => ItemSortBy.GameSystem;
    }
}