using System;
using System.Collections;
using System.Collections.Generic;
using BITKit;
using BITKit.CommandPattern;
using BITKit.Entities;
using BITKit.IO;
using Cysharp.Threading.Tasks;
using PaintIn3D;
using Unity.Mathematics;
using UnityEngine;

namespace BITFactory.Cutting
{
	[Serializable]
	public sealed class DIUnityCuttingTool : InjectFromDI<ICuttingTool>,ICuttingTool
	{
		private ICuttingTool _cuttingToolImplementation => Value;

		public ICommand[] Commands => _cuttingToolImplementation.Commands;

		public event Action<ICommand> OnExecute
		{
			add => _cuttingToolImplementation.OnExecute += value;
			remove => _cuttingToolImplementation.OnExecute -= value;
		}

		public event Action<ICommand> OnClear
		{
			add => _cuttingToolImplementation.OnClear += value;
			remove => _cuttingToolImplementation.OnClear -= value;
		}

		public event Action<ICommand> OnUndo
		{
			add => _cuttingToolImplementation.OnUndo += value;
			remove => _cuttingToolImplementation.OnUndo -= value;
		}

		public event Action<ICommand[]> OnRelease
		{
			add => _cuttingToolImplementation.OnRelease += value;
			remove => _cuttingToolImplementation.OnRelease -= value;
		}

		public void Execute(ICommand command)
		{
			_cuttingToolImplementation.Execute(command);
		}

		public void Undo()
		{
			_cuttingToolImplementation.Undo();
		}

		public void Undo(int count)
		{
			_cuttingToolImplementation.Undo(count);
		}

		public void Redo()
		{
			_cuttingToolImplementation.Redo();
		}

		public void Trace(ICommand command)
		{
			_cuttingToolImplementation.Trace(command);
		}

		public void Clear()
		{
			_cuttingToolImplementation.Clear();
		}

		public void Rebuild() => _cuttingToolImplementation.Rebuild();
		public void Release() => _cuttingToolImplementation.Release();

		public void CutPlanePoint(bool preview, float3 planeNormal, float3 planePoint)
		{
			_cuttingToolImplementation.CutPlanePoint(preview, planeNormal, planePoint);
		}

		public void CutPlantSphere(bool preview, float3 planeNormal, float3 planePoint, float radius)
		{
			_cuttingToolImplementation.CutPlantSphere(preview, planeNormal, planePoint, radius);
		}

		public void CutPlaneBox(bool preview, float3 planeNormal, float3 planePoint, float3 boxSize)
		{
			_cuttingToolImplementation.CutPlaneBox(preview, planeNormal, planePoint, boxSize);
		}

		public void CutPlaneLine(bool preview, float3 planeNormal, float3[] line)
		{
			_cuttingToolImplementation.CutPlaneLine(preview, planeNormal, line);
		}

		public void FillPlanePoint(bool preview, float3 planeNormal, float3 planePoint)
		{
			_cuttingToolImplementation.FillPlanePoint(preview, planeNormal, planePoint);
		}
	}


	
	[CustomType(typeof(ICuttingTool),true)]
	public class UnityCuttingTool : EntityBehavior,ICuttingTool
	{
		[SerializeField] private float defaultPointRadius = 0.1f;

		[SerializeReference, SubclassSelector] private IApplicationFile applicationFile;
		private P3dPaintSphere paintSphere
		{
			get
			{
				if (!_paintSphere)
				{
					_paintSphere = GetComponentInChildren<P3dPaintSphere>();
				}
				return _paintSphere;
			}
		}
		private P3dPaintSphere _paintSphere;

		private readonly CommandSequence _commands=new();
		private readonly CommandSequence _executedCommands=new();
		private void Awake()
		{
			DI.Register<ICuttingTool>(this);
		}

		private void OnEnable()
		{
			applicationFile.DataHandle += OnDataHandle;
			applicationFile.AddListener(nameof(UnityCuttingTool),OnData);
			
		}
		private void OnDisable()
		{
			applicationFile.DataHandle -= OnDataHandle;
			applicationFile.RemoveListener(nameof(UnityCuttingTool),OnData);
		}
		private (string, byte[]) OnDataHandle()
		{
			return new(nameof(UnityCuttingTool), BITBinary.WriteAsBytes(_executedCommands));
		}
		private async void OnData(byte[] obj)
		{
			await UniTask.NextFrame();
			if (destroyCancellationToken.IsCancellationRequested) return;
			Clear();
			var seq = BITBinary.Read<CommandSequence>(obj);
			_commands.AddRange(seq);
			_executedCommands.AddRange(seq);
			Rebuild();
		}

		public void CutPlanePoint(bool preview, float3 planeNormal, float3 planePoint)
		{
			paintSphere.Radius = defaultPointRadius;
			paintSphere.HandleHitLine(
				preview,
				0,
				1.0f,
				0,
				planePoint+planeNormal*1,
				planePoint-planeNormal*1,
				Quaternion.LookRotation(planeNormal),true);
		}

		public void CutPlantSphere(bool preview, float3 planeNormal, float3 planePoint, float radius)
		{
			paintSphere.Radius = radius;
			paintSphere.HandleHitLine(
				preview,
				0,
				1.0f,
				0,
				planePoint+planeNormal*1,
				planePoint-planeNormal*1,
				Quaternion.LookRotation(planeNormal),true);
		}

		public void CutPlaneBox(bool preview, float3 planeNormal, float3 planePoint, float3 boxSize)
		{
			throw new System.NotImplementedException();
		}
		
		public void CutPlaneLine(bool preview, float3 planeNormal, float3[] line)
		{
			paintSphere.Radius = defaultPointRadius;
			
			var lastPoint = line[0];
			foreach (var pos in line)
			{
				paintSphere.HandleHitLine(
					preview,
					0,
					1.0f,
					0,
					lastPoint,
					pos,
					Quaternion.LookRotation(planeNormal),true);
				lastPoint = pos;
			}
		}

		public void FillPlanePoint(bool preview, float3 planeNormal, float3 planePoint)
		{
			var texture = (Texture2D)_paintSphere.TargetTexture.Texture;
		}

		public ICommand[] Commands =>_executedCommands.ToArray();

		public event Action<ICommand> OnExecute;
		public event Action<ICommand> OnClear;
		public event Action<ICommand> OnUndo;
		public event Action<ICommand[]> OnRelease;

		public void Execute(ICommand command)
		{
			_commands.Add(command);
			OnExecute?.Invoke(command);
			_executedCommands.Add(command);
			
			ExecuteInternal(command);
		}
		public void Undo()
		{
			if(_executedCommands.Count==0)return;
			var command = _executedCommands[^1];
			command.Undo();
			_executedCommands.RemoveAt(_executedCommands.Count-1);
			
			OnClear?.Invoke(null);
			paintSphere.TargetTexture.Clear();
			
			foreach (var x in _executedCommands)
			{
				ExecuteInternal(x);
				OnExecute?.Invoke(x);
			}
		}
		public void Undo(int count)
		{
			throw new System.NotImplementedException();
		}
		public void Redo()
		{
			throw new System.NotImplementedException();
		}
		public void Trace(ICommand command)
		{
			var index = _commands.IndexOf(command);
			
			paintSphere.TargetTexture.Clear();
			OnClear?.Invoke(command);
			
			_executedCommands.Clear();
			_executedCommands.AddRange(_commands.GetRange(0, index));

			foreach (var x in _executedCommands)
			{
				ExecuteInternal(x);
				OnExecute?.Invoke(x);
			}
			
		}
		public void Clear()
		{
			OnClear?.Invoke(null);
			_executedCommands.Clear();
			_commands.Clear();
			paintSphere.TargetTexture.Clear();
		}

		public void Rebuild()
		{
			OnClear?.Invoke(null);
			foreach (var x in _executedCommands)
			{
				ExecuteInternal(x);
				OnExecute?.Invoke(x);
			}
		}

		public void Release()
		{
			OnRelease?.Invoke(_executedCommands.ToArray());
		}


		private void ExecuteInternal(ICommand command)
		{
			switch (command)
			{
				case CuttingPointCommand cuttingPointCommand:
					CutPlanePoint(false,cuttingPointCommand.PlaneNormal,cuttingPointCommand.PlanePoint);
					break;
				case CuttingSphereCommand sphereCommand:
					CutPlantSphere(false,sphereCommand.PlaneNormal,sphereCommand.PlanePoint,sphereCommand.Radius);
					break;
				case CuttingLineCommand lineCommand:
					CutPlaneLine(false,lineCommand.PlaneNormal,lineCommand.Line);
					break;
			}
		}
	}

}