using System;
using System.Collections.Generic;
using Microsoft.Xna.Framework.Graphics;
#if SMAPI_DEPRECATED
using StardewModdingAPI.Framework.Deprecations;
#endif

namespace StardewModdingAPI.Framework.Content
{
    internal class AssetInfo : IAssetInfo
    {
        /*********
        ** Fields
        *********/
        /// <summary>Normalizes an asset key to match the cache key.</summary>
        protected readonly Func<string, string> GetNormalizedPath;

        /// <summary>The backing field for <see cref="NameWithoutLocale"/>.</summary>
        private IAssetName? NameWithoutLocaleImpl;


        /*********
        ** Accessors
        *********/
        /// <inheritdoc />
        public string? Locale { get; }

        /// <inheritdoc />
        public IAssetName Name { get; }

        /// <inheritdoc />
        public IAssetName NameWithoutLocale => this.NameWithoutLocaleImpl ??= this.Name.GetBaseAssetName();

        /// <inheritdoc />
        public Type DataType { get; }

#if SMAPI_DEPRECATED
        /// <inheritdoc />
        [Obsolete($"Use {nameof(AssetInfo.Name)} or {nameof(AssetInfo.NameWithoutLocale)} instead. This property will be removed in SMAPI 4.0.0.")]
        public string AssetName
        {
            get
            {
                SCore.DeprecationManager.Warn(
                    source: null,
                    nounPhrase: $"{nameof(IAssetInfo)}.{nameof(IAssetInfo.AssetName)}",
                    version: "3.14.0",
                    severity: DeprecationLevel.Info,
                    unlessStackIncludes: new[]
                    {
                        $"{typeof(AssetInterceptorChange).FullName}.{nameof(AssetInterceptorChange.CanIntercept)}",
                        $"{typeof(ContentCoordinator).FullName}.{nameof(ContentCoordinator.GetAssetOperations)}"
                    }
                );

                return this.NameWithoutLocale.Name;
            }
        }
#endif


        /*********
        ** Public methods
        *********/
        /// <summary>Construct an instance.</summary>
        /// <param name="locale">The content's locale code, if the content is localized.</param>
        /// <param name="assetName">The asset name being read.</param>
        /// <param name="type">The content type being read.</param>
        /// <param name="getNormalizedPath">Normalizes an asset key to match the cache key.</param>
        public AssetInfo(string? locale, IAssetName assetName, Type type, Func<string, string> getNormalizedPath)
        {
            this.Locale = locale;
            this.Name = assetName;
            this.DataType = type;
            this.GetNormalizedPath = getNormalizedPath;
        }

#if SMAPI_DEPRECATED
        /// <inheritdoc />
        [Obsolete($"Use {nameof(Name)}.{nameof(IAssetName.IsEquivalentTo)} or {nameof(AssetInfo.NameWithoutLocale)}.{nameof(IAssetName.IsEquivalentTo)} instead. This method will be removed in SMAPI 4.0.0.")]
        public bool AssetNameEquals(string path)
        {
            SCore.DeprecationManager.Warn(
                source: null,
                nounPhrase: $"{nameof(IAssetInfo)}.{nameof(IAssetInfo.AssetNameEquals)}",
                version: "3.14.0",
                severity: DeprecationLevel.Info,
                unlessStackIncludes: new[]
                {
                    $"{typeof(AssetInterceptorChange).FullName}.{nameof(AssetInterceptorChange.CanIntercept)}",
                    $"{typeof(ContentCoordinator).FullName}.{nameof(ContentCoordinator.GetAssetOperations)}"
                }
            );


            return this.NameWithoutLocale.IsEquivalentTo(path);
        }
#endif


        /*********
        ** Protected methods
        *********/
        /// <summary>Get a human-readable type name.</summary>
        /// <param name="type">The type to name.</param>
        protected string GetFriendlyTypeName(Type type)
        {
            // dictionary
            if (type.IsGenericType && type.GetGenericTypeDefinition() == typeof(Dictionary<,>))
            {
                Type[] genericArgs = type.GetGenericArguments();
                return $"Dictionary<{this.GetFriendlyTypeName(genericArgs[0])}, {this.GetFriendlyTypeName(genericArgs[1])}>";
            }

            // texture
            if (type == typeof(Texture2D))
                return type.Name;

            // native type
            if (type == typeof(int))
                return "int";
            if (type == typeof(string))
                return "string";

            // default
            return type.FullName!;
        }
    }
}