using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Reflection;
using DataLoader;
using GamecraftModdingAPI.Utility;
using GPUInstancer;
using HarmonyLib;
using RobocraftX.Blocks;
using RobocraftX.Common;
using RobocraftX.Rendering;
using Svelto.DataStructures;
using Svelto.Tasks;
using Unity.Entities;
using Unity.Entities.Conversion;
using Unity.Physics;
using UnityEngine;
using UnityEngine.AddressableAssets;
using BoxCollider = UnityEngine.BoxCollider;
using Material = UnityEngine.Material;
using Object = UnityEngine.Object;

namespace GamecraftModdingAPI.Blocks
{
    public class CustomBlock
    {
        private static ushort nextID = 500;
        public static void RegisterCustomBlock(string path)
        {
            var prefabData = new List<PrefabData>();
            //category ID:
            //0 - regular
            //1 - joint
            //2 - controller
            uint prefabId = PrefabsID.FetchNewPrefabID(PrefabsID.GenerateDBID(0, nextID++));
            prefabData.Add(new PrefabData()
            {
                prefabName = path,
                prefabId = prefabId
            });
            var loadTask = Addressables.LoadAssetAsync<GameObject>(path);
            AccessTools.Method("RobocraftX.Common.ECSGPUIResourceManager:RegisterPrefab")
                .Invoke(ECSGPUIResourceManager.Instance, new object[] {prefabId, loadTask.Result, 1});
        }

        [HarmonyPatch]
        public static class Patch
        {
            /*public static IEnumerable<CodeInstruction> Transpiler(IEnumerable<CodeInstruction> instructions)
            {
                var list = new List<CodeInstruction>(instructions);
                try
                {
                    *int index = -1;
                    CodeInstruction loadTask = null;
                    for (var i = 0; i < list.Count - 1; i++)
                    {
                        if (list[i].opcode == OpCodes.Ldfld
                            && ((string) list[i].operand).Contains("renderingWorld")
                            && list[i + 1].opcode == OpCodes.Brfalse_S)
                            index = i - 1; //It loads 'this' first
                        if (list[i].opcode == OpCodes.Ldflda
                            && ((string) list[i].operand).Contains("loadTask"))
                            loadTask = new CodeInstruction(list[i]);
                    }*

                    var array = new[]
                    {
                        //Set Yield.It to be returned (current)
                        new CodeInstruction(OpCodes.Ldarg_0), // this
                        new CodeInstruction(OpCodes.Ldsfld,
                            typeof(Yield).GetField("It", BindingFlags.Public | BindingFlags.Static)),
                        new CodeInstruction(OpCodes.Stfld, "object RobocraftX.Common.ECSResourceManagerUtility/'<RegisterPrefabs>d__0'::'<>2__current'"),
                        
                        //Set which yield return we're at (state)
                        new CodeInstruction(OpCodes.Ldarg_0), // this
                        new CodeInstruction(OpCodes.Ldc_I4_1),
                        //new CodeInstruction(OpCodes.Call, ((Action<StringBuffer>)AddInfo).Method)
                    };
                    list.InsertRange(index, array);
                    *
                     IL_00ad: ldarg.0      // this
                      IL_00ae: ldsfld       class [Svelto.Tasks]Svelto.Tasks.Yield [Svelto.Tasks]Svelto.Tasks.Yield::It
                      IL_00b3: stfld        object RobocraftX.Common.ECSResourceManagerUtility/'<RegisterPrefabs>d__0'::'<>2__current'
                     
                      IL_0072: ldarg.0      // this
                      IL_0073: ldnull
                      IL_0074: stfld        object RobocraftX.Common.ECSResourceManagerUtility/'<RegisterPrefabs>d__0'::'<>2__current'
                      IL_0079: ldarg.0      // this
                      IL_007a: ldc.i4.2
                      IL_007b: stfld        object RobocraftX.Common.ECSResourceManagerUtility/'<RegisterPrefabs>d__0'::'<>1__state'
                      IL_0080: ldc.i4.1
                      IL_0081: ret
                     *
                    yield break;
                }
                catch (Exception e)
                {
                    Logging.LogWarning("Failed to inject AddInfo method for the debug display!\n" + e);
                }
            }*/

            private static Material[] materials;

            public static void Prefix(List<PrefabData> prefabData, IList<GameObject> prefabs)
            {
                /*foreach (var block in blocks.Values.Cast<CubeListData>())
                {
                    Console.WriteLine("Block info: " + block);
                }*/

                /*var res = Addressables.LoadContentCatalogAsync("customCatalog.json");
                while (!res.IsDone) yield return Yield.It;*/
                foreach (var gameObject in prefabs)
                {
                    switch (gameObject.name)
                    {
                        case "Cube":
                            gameObject.GetComponentsInChildren<MeshRenderer>()[0].sharedMaterials = materials;
                            break;
                        case "CTR_CommandBlock":
                            materials = gameObject.GetComponentsInChildren<MeshRenderer>()[0].sharedMaterials;
                            break;
                    }
                }
            }

            public static MethodBase TargetMethod()
            { //General block registration
                //return AccessTools.Method("RobocraftX.Blocks.BlocksCompositionRoot:RegisterPartPrefabs");
                return AccessTools.Method("RobocraftX.Rendering.ECSGPUIResourceManager:InitPreRegisteredPrefabs");
            }
        }

        /*[HarmonyPatch]
        public static class RendererPatch
        {
            private static Material[] materials;
            public static void Prefix(uint prefabID, GameObject gameObject)
            {
                Console.WriteLine("ID: " + prefabID + " - Name: " + gameObject.name);
                if (gameObject.name == "Cube")
                {
                    //Console.WriteLine("Length: " + gameObject.GetComponentsInChildren<MeshRenderer>().Length);
                    if (materials != null)
                        gameObject.GetComponentsInChildren<MeshRenderer>()[0].sharedMaterials = materials;
                    /*ECSGPUIResourceManager.Instance.RegisterGhostsPrefabsAtRuntime(
                        new[] {new PrefabData {prefabId = prefabID, prefabName = "Assets/Prefabs/Cube.prefab"}},
                        new List<GameObject> {gameObject});#1#
                    GameObject go = Object.Instantiate(gameObject);
                    go.SetActive(false);
                    AccessTools.Method("RobocraftX.Rendering.ECSGPUIResourceManager:RegisterNewPrefabAtRuntime")
                        .Invoke(ECSGPUIResourceManager.Instance,
                            new object[] {(uint) ((int) prefabID * 2 + 1), gameObject, true});
                    //ECSGPUIResourceManager.Instance.RegisterNewPrefabAtRuntime((uint) ((int)prefabID * 2 + 1), gameObject, true); //.isOcclusionCulling = false;
                    UnityEngine.Object.Destroy(gameObject);
                    GPUInstancerAPI.AddInstancesToPrefabPrototypeAtRuntime(ECSGPUIResourceManager.Instance.prefabManager,
                        gameObject.GetComponent<GPUInstancerPrefab>().prefabPrototype, new[] {gameObject});
                    Console.WriteLine("Registered prefab to instancer");
                    
                    /*var register = AccessTools.Method("RobocraftX.Common.ECSPhysicResourceManager:RegisterPrefab",
                        new[] {typeof(uint), typeof(GameObject), typeof(World), typeof(BlobAssetStore)});
                    register.Invoke(ECSPhysicResourceManager.Instance,
                        new object[] {prefabID, gameObject, MGPatch.data.Item1, MGPatch.data.Item2});#1#
                    /*Console.WriteLine(
                        "Entity: " + ECSPhysicResourceManager.Instance.GetUECSPhysicEntityPrefab(prefabID));
                    Console.WriteLine("Prefab ID: " + PrefabsID.DBIDMAP[500]);
                    PhysicsCollider componentData = MGPatch.data.Item1.EntityManager.GetComponentData<PhysicsCollider>(ECSPhysicResourceManager.Instance.GetUECSPhysicEntityPrefab(prefabID));
                    Console.WriteLine("Collider valid: " + componentData.IsValid);
                    unsafe
                    {
                        Console.WriteLine("Collider type: " + componentData.ColliderPtr->Type);
                        CollisionFilter filter = componentData.Value.Value.Filter;
                        Console.WriteLine("Filter not empty: " + !filter.IsEmpty);
                    }#1#
                    //MGPatch.data.Item1.EntityManager.GetComponentData<>()
                    gameObject.AddComponent<BoxCollider>();
                    gameObject.AddComponent<Transform>();
                    Console.WriteLine("Registered prefab to physics");
                    ECSGPUIResourceManager.Instance.RegisterGhostsPrefabsAtRuntime();
                }
                else if (gameObject.name == "CTR_CommandBlock")
                    materials = gameObject.GetComponentsInChildren<MeshRenderer>()[0].sharedMaterials;
            }

            public static MethodBase TargetMethod()
            {RobocraftX.Common.ECSGPUIResourceManager.RegisterPrefab
                return AccessTools.Method("RobocraftX.Common.ECSGPUIResourceManager:RegisterPrefab",
                    new[] {typeof(uint), typeof(GameObject)});
            }
        }*/

        [HarmonyPatch]
        public static class RMPatch
        {
            public static void Prefix(World physicsWorld,
                GameObjectConversionSystem getExistingSystem,
                FasterList<GameObject> gos,
                List<PrefabData> prefabData)
            {
                Console.WriteLine("First game object data:\n" + gos[0].GetComponents<Component>()
                    .Select(c => c + " - " + c.name + " " + c.GetType())
                    .Aggregate((a, b) => a + "\n" + b));
                for (var index = 0; index < prefabData.Count; index++)
                {
                    var data = prefabData[index];
                    if (!data.prefabName.EndsWith("Cube.prefab")) continue;
                    //getExistingSystem.DeclareLinkedEntityGroup(gos[index]);
                    /*Entity entity = GameObjectConversionUtility.ConvertGameObjectHierarchy(gos[index],
                        GameObjectConversionSettings.FromWorld(physicsWorld, MGPatch.data.Item2));*/
                    Console.WriteLine("Transform: " + gos[index].transform.childCount);
                    Entity primaryEntity = getExistingSystem.GetPrimaryEntity(gos[index]);
                    MultiListEnumerator<Entity> entities = getExistingSystem.GetEntities(gos[index]);
                    Console.WriteLine("ID: " + data.prefabId + " - Name: " + data.prefabName);
                    Console.WriteLine("Primary entity: " + primaryEntity);
                    EntityManager entityManager = physicsWorld.EntityManager;
                    Console.WriteLine("Has collider: " + entityManager.HasComponent<PhysicsCollider>(primaryEntity));
                    while (entities.MoveNext())
                    {
                        Entity current = entities.Current;
                        Console.WriteLine("Entity " + current + " has collider: " +
                                          entityManager.HasComponent<PhysicsCollider>(current));
                    }

                    Console.WriteLine("Adding GPUI prefab");
                    ((GPUInstancerPrefabManager) GPUInstancerManager.activeManagerList.Single(gim =>
                            gim is GPUInstancerPrefabManager))
                        .AddRuntimeRegisteredPrefab(gos[index].GetComponent<GPUInstancerPrefab>());
                    Console.WriteLine("Added GPUI prefab");
                }
            }

            public static MethodBase TargetMethod()
            {
                return AccessTools.Method("RobocraftX.Blocks.ECSResourceManagerUtility:RelinkEntities",
                    new[]
                    {
                        typeof(World),
                        typeof(GameObjectConversionSystem),
                        typeof(FasterList<GameObject>),
                        typeof(List<PrefabData>)
                    });
            }
        }

        [HarmonyPatch]
        public static class MGPatch
        {
            internal static (World, BlobAssetStore) data;
            public static void Prefix(World physicsWorld, BlobAssetStore blobStore, IDataDB dataDB)
            {
                data = (physicsWorld, blobStore);
                //RobocraftX.CR.MachineEditing.UpdateSelectedGhostBlockEngine.UpdateGhostBlock
                //var cld = (CubeListData) ((DataImplementor) dataDB).CreateDataObject("500", typeof(CubeListData), null);
                var abd = dataDB.GetValue<CubeListData>((int) BlockIDs.AluminiumCube);
                var cld = new CubeListData
                {
                    cubeType = CubeType.Block,
                    cubeCategory = CubeCategory.General,
                    inventoryCategory = InventoryCategory.Shapes,
                    ID = 500,
                    Path = "Assets/Prefabs/Cube.prefab", //Index out of range exception: Asset failed to load (wrong path)
                    SpriteName = "CTR_CommandBlock",
                    CubeNameKey = "strConsoleBlock",
                    SelectableFaces = new[] {0, 1, 2, 3, 4, 5},
                    GridScale = new[] {1, 1, 1},
                    Mass = 1,
                    JointBreakAngle = 1,
                    Material = abd.Material
                };
                Console.WriteLine("Aluminium block data:\n" + abd);
                Console.WriteLine("Material: " + abd.Material);
                dataDB.GetValues<CubeListData>().Add("500", cld); //The registration needs to happen after the ID has been set
                dataDB.GetFasterValues<CubeListData>().Add(500, cld);
                //RobocraftX.ExplosionFragments.Engines.PlayFragmentExplodeEngine.PlayRigidBodyEffect
            }

            public static MethodBase TargetMethod()
            {
                return AccessTools.Method("RobocraftX.CR.MainGame.MainGameCompositionRoot:Init");
            }
        }

        public static IEnumerator Prep()
        { //TODO: Don't let the game load until this finishes
            Console.WriteLine("Loading custom catalog...");
            var res = Addressables.LoadContentCatalogAsync("customCatalog.json");
            while (!res.IsDone) yield return Yield.It;
            Console.WriteLine("Loaded custom catalog: " + res.Result.LocatorId);
            Addressables.AddResourceLocator(res.Result);
            /*Console.WriteLine("Loading Cube asset...");
            var loadTask = Addressables.LoadAssetAsync<GameObject>("Assets/Cube.prefab");
            while (!loadTask.IsDone) yield return Yield.It;
            Console.WriteLine("Exception: "+loadTask.OperationException);
            Console.WriteLine("Result: " + loadTask.Result.name);*/
        }
    }
}