using System.Collections.Generic;
using Microsoft.Xna.Framework.Graphics;
using StardewModdingAPI.AssemblyRewriters;
using StardewModdingAPI.Events;
using StardewModdingAPI.Framework.ModLoading;
using StardewModdingAPI.Framework.ModLoading.Finders;
using StardewModdingAPI.Framework.ModLoading.Rewriters;
using StardewValley;
#if STARDEW_VALLEY_1_3
using SObject = StardewValley.Object;
#endif

namespace StardewModdingAPI.Metadata
{
    /// <summary>Provides CIL instruction handlers which rewrite mods for compatibility and throw exceptions for incompatible code.</summary>
    internal class InstructionMetadata
    {
        /*********
        ** Properties
        *********/
        /// <summary>The assembly names to which to heuristically detect broken references.</summary>
        /// <remarks>The current implementation only works correctly with assemblies that should always be present.</remarks>
        private readonly string[] ValidateReferencesToAssemblies = { "StardewModdingAPI", "Stardew Valley", "StardewValley" };


        /*********
        ** Public methods
        *********/
        /// <summary>Get rewriters which detect or fix incompatible CIL instructions in mod assemblies.</summary>
        public IEnumerable<IInstructionHandler> GetHandlers()
        {
            return new IInstructionHandler[]
            {
                /****
                ** rewrite CIL to fix incompatible code
                ****/
                // rewrite for crossplatform compatibility
                new MethodParentRewriter(typeof(SpriteBatch), typeof(SpriteBatchMethods), onlyIfPlatformChanged: true),

#if !STARDEW_VALLEY_1_3
                // rewrite for Stardew Valley 1.2
                new FieldToPropertyRewriter(typeof(Game1), nameof(Game1.activeClickableMenu)),
                new FieldToPropertyRewriter(typeof(Game1), nameof(Game1.currentMinigame)),
                new FieldToPropertyRewriter(typeof(Game1), nameof(Game1.gameMode)),
                new FieldToPropertyRewriter(typeof(Game1), nameof(Game1.player)),
                new FieldReplaceRewriter(typeof(Game1), "borderFont", nameof(Game1.smallFont)),
                new FieldReplaceRewriter(typeof(Game1), "smoothFont", nameof(Game1.smallFont)),

                // rewrite for SMAPI 1.9
                new TypeReferenceRewriter("StardewModdingAPI.Inheritance.ItemStackChange", typeof(ItemStackChange)),
#endif

                // rewrite for SMAPI 2.0
                new VirtualEntryCallRemover(),

                // rewrite for Stardew Valley 1.3
#if STARDEW_VALLEY_1_3
                new StaticFieldToConstantRewriter<int>(typeof(Game1), "tileSize", Game1.tileSize),
                new FieldToPropertyRewriter(typeof(Character), nameof(Character.name), nameof(Character.Name)),
                new FieldToPropertyRewriter(typeof(GameLocation), nameof(GameLocation.isFarm), nameof(GameLocation.IsFarm)),
                new FieldToPropertyRewriter(typeof(GameLocation), nameof(GameLocation.isOutdoors), nameof(GameLocation.isOutdoors)),
                new FieldToPropertyRewriter(typeof(GameLocation), nameof(GameLocation.name), nameof(GameLocation.Name)),
                new FieldToPropertyRewriter(typeof(Item), nameof(Item.category), nameof(Item.Category)),
                new FieldToPropertyRewriter(typeof(SObject), nameof(SObject.quality), nameof(SObject.Quality)),
                new FieldToPropertyRewriter(typeof(SObject), nameof(SObject.stack), nameof(SObject.Stack)),
#endif

                /****
                ** detect incompatible code
                ****/
                #if !STARDEW_VALLEY_1_3
                // detect changes in Stardew Valley 1.2
                new FieldFinder("StardewValley.Item", "set_Name", InstructionHandleResult.NotCompatible),

                // detect APIs removed in SMAPI 1.9
                new TypeFinder("StardewModdingAPI.Advanced.ConfigFile", InstructionHandleResult.NotCompatible),
                new TypeFinder("StardewModdingAPI.Advanced.IConfigFile", InstructionHandleResult.NotCompatible),
                new TypeFinder("StardewModdingAPI.Entities.SPlayer", InstructionHandleResult.NotCompatible),
                new TypeFinder("StardewModdingAPI.Extensions", InstructionHandleResult.NotCompatible),
                new TypeFinder("StardewModdingAPI.Inheritance.SGame", InstructionHandleResult.NotCompatible),
                new TypeFinder("StardewModdingAPI.Inheritance.SObject", InstructionHandleResult.NotCompatible),
                new TypeFinder("StardewModdingAPI.LogWriter", InstructionHandleResult.NotCompatible),
                new TypeFinder("StardewModdingAPI.Manifest", InstructionHandleResult.NotCompatible),
                new TypeFinder("StardewModdingAPI.Version", InstructionHandleResult.NotCompatible),
                new EventFinder("StardewModdingAPI.Events.GraphicsEvents", "DrawDebug", InstructionHandleResult.NotCompatible),
                new EventFinder("StardewModdingAPI.Events.GraphicsEvents", "DrawTick", InstructionHandleResult.NotCompatible),
                new EventFinder("StardewModdingAPI.Events.GraphicsEvents", "OnPostRenderHudEventNoCheck", InstructionHandleResult.NotCompatible),
                new EventFinder("StardewModdingAPI.Events.GraphicsEvents", "OnPostRenderGuiEventNoCheck", InstructionHandleResult.NotCompatible),
                new EventFinder("StardewModdingAPI.Events.GraphicsEvents", "OnPreRenderHudEventNoCheck", InstructionHandleResult.NotCompatible),
                new EventFinder("StardewModdingAPI.Events.GraphicsEvents", "OnPreRenderGuiEventNoCheck", InstructionHandleResult.NotCompatible),

                // detect APIs removed in SMAPI 2.0
                new TypeFinder("StardewModdingAPI.Command", InstructionHandleResult.NotCompatible),
                new TypeFinder("StardewModdingAPI.Config", InstructionHandleResult.NotCompatible),
                new TypeFinder("StardewModdingAPI.Log", InstructionHandleResult.NotCompatible),
                new EventFinder("StardewModdingAPI.Events.GameEvents", "Initialize", InstructionHandleResult.NotCompatible),
                new EventFinder("StardewModdingAPI.Events.GameEvents", "LoadContent", InstructionHandleResult.NotCompatible),
                new EventFinder("StardewModdingAPI.Events.GameEvents", "GameLoaded", InstructionHandleResult.NotCompatible),
                new EventFinder("StardewModdingAPI.Events.PlayerEvents", "LoadedGame", InstructionHandleResult.NotCompatible),
                new EventFinder("StardewModdingAPI.Events.PlayerEvents", "FarmerChanged", InstructionHandleResult.NotCompatible),
                new EventFinder("StardewModdingAPI.Events.TimeEvents", "DayOfMonthChanged", InstructionHandleResult.NotCompatible),
                new EventFinder("StardewModdingAPI.Events.TimeEvents", "YearOfGameChanged", InstructionHandleResult.NotCompatible),
                new EventFinder("StardewModdingAPI.Events.TimeEvents", "SeasonOfYearChanged", InstructionHandleResult.NotCompatible),
                new EventFinder("StardewModdingAPI.Events.TimeEvents", "OnNewDay", InstructionHandleResult.NotCompatible),
                new TypeFinder("StardewModdingAPI.Events.EventArgsCommand", InstructionHandleResult.NotCompatible),
                new TypeFinder("StardewModdingAPI.Events.EventArgsFarmerChanged", InstructionHandleResult.NotCompatible),
                new TypeFinder("StardewModdingAPI.Events.EventArgsLoadedGameChanged", InstructionHandleResult.NotCompatible),
                new TypeFinder("StardewModdingAPI.Events.EventArgsNewDay", InstructionHandleResult.NotCompatible),
                new TypeFinder("StardewModdingAPI.Events.EventArgsStringChanged", InstructionHandleResult.NotCompatible),
                new PropertyFinder("StardewModdingAPI.Mod", "PathOnDisk", InstructionHandleResult.NotCompatible),
                new PropertyFinder("StardewModdingAPI.Mod", "BaseConfigPath", InstructionHandleResult.NotCompatible),
                new PropertyFinder("StardewModdingAPI.Mod", "PerSaveConfigFolder", InstructionHandleResult.NotCompatible),
                new PropertyFinder("StardewModdingAPI.Mod", "PerSaveConfigPath", InstructionHandleResult.NotCompatible),
                #endif

                // detect broken code
                new ReferenceToMissingMemberFinder(this.ValidateReferencesToAssemblies),
                new ReferenceToMemberWithUnexpectedTypeFinder(this.ValidateReferencesToAssemblies),

                /****
                ** detect code which may impact game stability
                ****/
                new TypeFinder("Harmony.HarmonyInstance", InstructionHandleResult.DetectedGamePatch),
                new TypeFinder("System.Runtime.CompilerServices.CallSite", InstructionHandleResult.DetectedDynamic),
                new FieldFinder(typeof(SaveGame).FullName, nameof(SaveGame.serializer), InstructionHandleResult.DetectedSaveSerialiser),
                new FieldFinder(typeof(SaveGame).FullName, nameof(SaveGame.farmerSerializer), InstructionHandleResult.DetectedSaveSerialiser),
                new FieldFinder(typeof(SaveGame).FullName, nameof(SaveGame.locationSerializer), InstructionHandleResult.DetectedSaveSerialiser),
                new EventFinder(typeof(SpecialisedEvents).FullName, nameof(SpecialisedEvents.UnvalidatedUpdateTick), InstructionHandleResult.DetectedUnvalidatedUpdateTick)
            };
        }
    }
}