using System;
using System.Collections;
using System.Collections.Generic;
using System.Text;
using UnityEngine;
using UnityEngine.InputSystem;
using UnityEngine.Pool;
using UnityEngine.UIElements;

namespace BITKit.UX
{
	public class UXAllowInput : MonoBehaviour
	{
		[RuntimeInitializeOnLoadMethod]
		private static void Reload()
		{
			Allow.Clear();
		}
		internal static readonly ValidHandle Allow=new();
		[SerializeField] private UIDocument document;
		private IPanel _panel;

		[SerializeField, ReadOnly] private bool isAllow;
		[SerializeField, ReadOnly] private bool globalAllow;
		[SerializeField, ReadOnly] private string blockBy;
		
		private bool isLocked;
		private void Start()
		{
			_panel = document.rootVisualElement.panel;
			
		}

		private void OnEnable()
		{
			Allow.AddElement(this);
		}
		private void OnDisable()
		{
			Allow.RemoveElement(this);
		}
		private void Update()
		{
			var mousePos = Mouse.current.position.ReadValue();

			mousePos.y = Screen.height - mousePos.y;
			
			var ve =_panel.Pick(RuntimePanelUtils.ScreenToPanel(_panel,mousePos ));

			if (ve is not null)
			{
				var list = ListPool<string>.Get();
				var v = ve;
				{
					while (true)
					{
						list.Add(v.name);
						if (v.parent is not null)
						{
							v = v.parent;
							continue;
						}

						break;
					}
				}
				blockBy = string.Join("\\", list);

				list.Clear();
				ListPool<string>.Release(list);
			}
			else
			{
				blockBy = "unblocked";
			}
			switch (ve,Mouse.current.press.isPressed)
			{
				
				case (null,false) when isLocked is false:
					Allow.AddElement(this);
					Allow.RemoveDisableElements(this);
					break;
				case (not null,false):
					Allow.RemoveElement(this);
					Allow.AddDisableElements(this);
					break;
				case (not null,true):
					isLocked = true;
					break;
				case (null,false):
					isLocked = false;
					break;
			}
			
			
			
			isAllow = ve is null;
			globalAllow = Allow.Allow;
		}
	}
}