using System;
using System.Globalization;
using Microsoft.Xna.Framework.Graphics;
using StardewModdingAPI.Framework.Reflection;
using StardewValley;

namespace StardewModdingAPI.Framework.ContentManagers
{
    /// <summary>An extension of <see cref="GameContentManager"/> specifically optimized for asset propagation.</summary>
    /// <remarks>This avoids sharing an asset cache with <see cref="Game1.content"/> or mods, so that assets can be safely disposed when the vanilla game no longer references them.</remarks>
    internal class GameContentManagerForAssetPropagation : GameContentManager
    {
        /*********
        ** Fields
        *********/
        /// <summary>A unique value used in <see cref="Texture2D"/> to identify assets loaded through this instance.</summary>
        private readonly string Tag = $"Pathoschild.SMAPI/LoadedBy:{nameof(GameContentManagerForAssetPropagation)}";


        /*********
        ** Public methods
        *********/
        /// <inheritdoc />
        public GameContentManagerForAssetPropagation(string name, IServiceProvider serviceProvider, string rootDirectory, CultureInfo currentCulture, ContentCoordinator coordinator, IMonitor monitor, Reflector reflection, Action<BaseContentManager> onDisposing, Action onLoadingFirstAsset, Action<BaseContentManager, IAssetName> onAssetLoaded, bool aggressiveMemoryOptimizations)
            : base(name, serviceProvider, rootDirectory, currentCulture, coordinator, monitor, reflection, onDisposing, onLoadingFirstAsset, onAssetLoaded, aggressiveMemoryOptimizations) { }

        /// <inheritdoc />
        public override T LoadExact<T>(IAssetName assetName, bool useCache)
        {
            T data = base.LoadExact<T>(assetName, useCache);

            if (data is Texture2D texture)
                texture.Tag = this.Tag;

            return data;
        }

        /// <summary>Get whether a texture was loaded by this content manager.</summary>
        /// <param name="texture">The texture to check.</param>
        public bool IsResponsibleFor(Texture2D? texture)
        {
            return
                texture?.Tag is string tag
                && tag.Contains(this.Tag);
        }
    }
}