using System;
using System.Reflection;
using Gamecraft.Blocks.BlockGroups;
using Gamecraft.GUI.Blueprints;
using GamecraftModdingAPI.Engines;
using GamecraftModdingAPI.Utility;
using HarmonyLib;
using RobocraftX.Blocks;
using RobocraftX.Common;
using RobocraftX.CR.MachineEditing.BoxSelect;
using RobocraftX.CR.MachineEditing.BoxSelect.ClipboardOperations;
using Svelto.DataStructures;
using Svelto.ECS;
using Svelto.ECS.DataStructures;
using Svelto.ECS.EntityStructs;
using Svelto.ECS.Serialization;
using Unity.Collections;
using Unity.Mathematics;
using UnityEngine;

namespace GamecraftModdingAPI.Blocks
{
    public class BlueprintEngine : IApiEngine
    {
        private readonly MethodInfo getBlocksFromGroup =
            AccessTools.Method("RobocraftX.CR.MachineEditing.PlaceBlockUtility:GetBlocksSharingBlockgroup");
        private readonly NativeDynamicArray selectedBlocksInGroup = new NativeDynamicArray();
        private readonly NativeHashSet<ulong> removedConnections = new NativeHashSet<ulong>();
        
        private static readonly Type PlaceBlueprintUtilityType =
            AccessTools.TypeByName("RobocraftX.CR.MachineEditing.PlaceBlueprintUtility");
        private static readonly FieldInfo LocalBlockMap =
            AccessTools.DeclaredField(PlaceBlueprintUtilityType, "_localBlockMap");
        private static readonly MethodInfo BuildBlock = AccessTools.Method(PlaceBlueprintUtilityType, "BuildBlock");
        private static readonly MethodInfo BuildWires = AccessTools.Method(PlaceBlueprintUtilityType, "BuildWires");

        private static NativeEntityRemove nativeRemove;
        private static MachineGraphConnectionEntityFactory connectionFactory;
        private static IEntityFunctions entityFunctions;
        private static ClipboardSerializationDataResourceManager clipboardManager;
        private static IEntitySerialization entitySerialization;
        private static IEntityFactory entityFactory;
        private static FasterList<EGID> globalBlockMap;
        
        public void Ready()
        {
        }

        public EntitiesDB entitiesDB { get; set; }
        public void Dispose()
        {
        }

        public Block[] GetBlocksFromGroup(EGID blockID)
        {
            var list = new FasterList<Block>();
            object blockPos = null, blockRot = null;
            getBlocksFromGroup.Invoke(null, new[] {blockID, selectedBlocksInGroup, entitiesDB, blockPos, blockRot});
            for (uint i = 0; i < selectedBlocksInGroup.Count<EGID>(); i++)
                list.Add(new Block(selectedBlocksInGroup.Get<EGID>(i)));
            selectedBlocksInGroup.FastClear();
            return list.ToArray();
        }

        public void RemoveBlockGroup(int id)
        {
            BlockGroupUtility.RemoveAllBlocksInBlockGroup(id, entitiesDB, removedConnections, nativeRemove,
                connectionFactory, default).Complete();
        }

        public void SelectBlueprint(uint resourceID)
        {
            BlueprintUtil.SelectBlueprint(null, new BlueprintInventoryItemEntityStruct
            {
                blueprintResourceId = resourceID,
            });
        }

        public uint CreateBlueprint()
        {
            uint index = clipboardManager.AllocateSerializationData();
            return index;
        }
        
        public void ReplaceBlueprint(uint playerID, uint blueprintID, Block[] selected, float3 pos, quaternion rot)
        {
            var blockIDs = new EGID[selected.Length];
            for (var i = 0; i < selected.Length; i++)
            {
                var block = selected[i];
                blockIDs[i] = block.Id;
            }

            var serializationData = clipboardManager.GetSerializationData(blueprintID);
            SelectionSerializationUtility.ClearClipboard(playerID, entitiesDB, entityFunctions, serializationData.blueprintData);
            if (selected.Length == 0)
                return;
            //ref BlockGroupTransformEntityComponent groupTransform = ref EntityNativeDBExtensions.QueryEntity<BlockGroupTransformEntityComponent>(entitiesDb, (uint) local1.currentBlockGroup, BlockGroupExclusiveGroups.BlockGroupEntityGroup);
            //ref ColliderAabb collider = ref EntityNativeDBExtensions.QueryEntity<ColliderAabb>(entitiesDB, (uint) groupID, BlockGroupExclusiveGroups.BlockGroupEntityGroup);
            //float3 bottomOffset = PlaceBlockUtility.GetBottomOffset(collider);
            //var rootPosition = math.mul(groupTransform.blockGroupGridRotation, bottomOffset) + groupTransform.blockGroupGridPosition;
            //var rootRotation = groupTransform.blockGroupGridRotation;
            if (math.all(pos == default))
                pos = selected[0].Position;
            if (math.all(rot.value == default))
                rot = Quaternion.Euler(selected[0].Rotation);
            
            clipboardManager.SetGhostSerialized(blueprintID, false);
            SelectionSerializationUtility.CopySelectionToClipboard(playerID, entitiesDB,
                serializationData.blueprintData, entitySerialization, entityFactory, blockIDs,
                (uint) blockIDs.Length, pos, rot);
        }

        public Block[] PlaceBlueprintBlocks(uint blueprintID, uint playerID, float3 pos, float3 rot)
        { //RobocraftX.CR.MachineEditing.PlaceBlueprintUtility.PlaceBlocksFromSerialisedData
            var serializationData = clipboardManager.GetSerializationData(blueprintID);
            var blueprintData = serializationData.blueprintData;
            blueprintData.dataPos = 0U;
            uint selectionSize;
            PositionEntityStruct selectionPosition;
            RotationEntityStruct selectionRotation;
            uint version;
            BoxSelectSerializationUtilities.ReadClipboardHeader(blueprintData, out selectionSize, out selectionPosition, out selectionRotation, out version);
            ((FasterList<EGID>) LocalBlockMap.GetValue(null)).Clear();
            if (version <= 1U)
            {
                uint groupsCount;
                BoxSelectSerializationUtilities.ReadBlockGroupData(blueprintData, out groupsCount);
                for (int index = 0; (long) index < (long) groupsCount; ++index)
                {
                    int nextFilterId = BlockGroupUtility.NextFilterId;
                    entitySerialization.DeserializeNewEntity(new EGID((uint) nextFilterId, BlockGroupExclusiveGroups.BlockGroupEntityGroup), blueprintData, 1);
                }
            }
            int nextFilterId1 = BlockGroupUtility.NextFilterId;
            entityFactory.BuildEntity<BlockGroupEntityDescriptor>(new EGID((uint) nextFilterId1, BlockGroupExclusiveGroups.BlockGroupEntityGroup)).Init(new BlockGroupTransformEntityComponent
            {
                blockGroupGridPosition = selectionPosition.position,
                blockGroupGridRotation = selectionRotation.rotation
            });
            var frot = Quaternion.Euler(rot);
            var grid = new GridRotationStruct {position = pos, rotation = frot};
            var poss = new PositionEntityStruct {position = pos};
            var rots = new RotationEntityStruct {rotation = frot};
            for (int index = 0; (long) index < (long) selectionSize; ++index)
                BuildBlock.Invoke(null,
                    new object[]
                    {
                        playerID, grid, poss, rots, selectionPosition, selectionRotation, blueprintData,
                        entitiesDB, entitySerialization, nextFilterId1
                    });
            /*
             uint playerId, in GridRotationStruct ghostParentGrid,
             in PositionEntityStruct ghostParentPosition, in RotationEntityStruct ghostParentRotation,
             in PositionEntityStruct selectionPosition, in RotationEntityStruct selectionRotation,
              ISerializationData serializationData, EntitiesDB entitiesDb,
              IEntitySerialization entitySerialization, int blockGroupId
             */
            if (globalBlockMap == null)
                globalBlockMap = FullGameFields._deserialisedBlockMap;
            var placedBlocks = (FasterList<EGID>) LocalBlockMap.GetValue(null);
            globalBlockMap.Clear();
            globalBlockMap.AddRange(placedBlocks);
            BuildWires.Invoke(null,
                new object[] {playerID, blueprintData, entitySerialization, entitiesDB, entityFactory});
            var blocks = new Block[placedBlocks.count];
            for (int i = 0; i < blocks.Length; i++)
                blocks[i] = new Block(placedBlocks[i]);
            return blocks;
        }

        public void InitBlueprint(uint blueprintID)
        {
            clipboardManager.IncrementRefCount(blueprintID);
        }

        public void DisposeBlueprint(uint blueprintID)
        {
            clipboardManager.DecrementRefCount(blueprintID);
        }

        public string Name { get; } = "GamecraftModdingAPIBlueprintGameEngine";
        public bool isRemovable { get; }

        [HarmonyPatch]
        private static class RemoveEnginePatch
        {
            public static void Prefix(IEntityFunctions entityFunctions,
                MachineGraphConnectionEntityFactory machineGraphConnectionEntityFactory)
            {
                nativeRemove = entityFunctions.ToNativeRemove<BlockEntityDescriptor>("GCAPI" + nameof(BlueprintEngine));
                connectionFactory = machineGraphConnectionEntityFactory;
                BlueprintEngine.entityFunctions = entityFunctions;
            }

            public static MethodBase TargetMethod()
            {
                return AccessTools.Constructor(AccessTools.TypeByName("RobocraftX.CR.MachineEditing.RemoveBlockEngine"));
            }
        }

        [HarmonyPatch]
        private static class SelectEnginePatch
        {
            public static void Prefix(ClipboardSerializationDataResourceManager clipboardSerializationDataResourceManager,
                IEntitySerialization entitySerialization,
                IEntityFactory entityFactory)
            {
                clipboardManager = clipboardSerializationDataResourceManager;
                BlueprintEngine.entitySerialization = entitySerialization;
                BlueprintEngine.entityFactory = entityFactory;
            }

            public static MethodBase TargetMethod()
            {
                return AccessTools.Constructor(AccessTools.TypeByName("RobocraftX.CR.MachineEditing.SelectBlockEngine"));
            }
        }
    }
}