using System;
using System.Collections;
using System.Collections.Generic;
using System.Xml.Linq;
using BITFALL.Entities.Inventory;
using BITFALL.UX;
using BITKit;
using BITKit.Entities;
using BITKit.Entities.Player;
using BITKit.UX;
using Cysharp.Threading.Tasks;
using UnityEngine;
using UnityEngine.InputSystem;
using UnityEngine.InputSystem.Interactions;
using UnityEngine.UIElements;
using UXUtils = BITFALL.UX.UXUtils;

namespace BITFALL.Items
{
	public sealed class UXInventorySwap : UIToolKitPanel
	{
		[Header(Constant.Header.Input)]
		[SerializeField] private InputActionReference escapeAction;
		[SerializeField] private InputActionReference inventoryAction;
		
		[Header(Constant.Header.Services)]
		[SerializeReference,SubclassSelector] private IPlayerService playerService;
		
		[Header(Constant.Header.Prefabs)]
		[SerializeField] private VisualTreeAsset itemPrefab;
		
		[Inject]
		private IEntitySwapItem swapItem;
		[Inject]
		private IEntityInventory inventory;

		private VisualElement selfContainer;
		private VisualElement otherContainer;
		protected override void Start()
		{
			base.Start();
			inputActionGroup.RegisterCallback(escapeAction, OnEscape);
			inputActionGroup.RegisterCallback(inventoryAction, OnInventory);
			
			selfContainer = document.rootVisualElement.Q<VisualElement>("self-container");
			otherContainer = document.rootVisualElement.Q<VisualElement>("other-container");
		}

		protected override void OnEnable()
		{
			base.OnEnable();
			playerService.OnPlayerInitialized += OnPlayerInitialized;
		}

		protected override void OnDisable()
		{
			base.OnDisable();
			playerService.OnPlayerInitialized -= OnPlayerInitialized;
		}

		private void OnPlayerInitialized(Entity obj)
		{
			obj.Inject(this);
			swapItem.OnSwapOpened += OnSwapOpened;
			
			swapItem.OnSwapClosed += OnSwapClosed;
			
			inventory.OnAdd+=_=>ReBuild();
			inventory.OnRemove+=_=>ReBuild();
			inventory.OnRebuild+=_=>ReBuild();
		}

		private void OnSwapClosed(IBasicItemContainer obj)
		{
			UXService.Entry<UXHud>();
		}

		private void OnSwapOpened(IBasicItemContainer obj)
		{
			UXService.Entry<UXInventorySwap>();

			ReBuild(obj);
		}

		private void OnInventory(InputAction.CallbackContext obj)
		{
			if(obj is not {interaction:PressInteraction,performed:true}) return;
			UXService.Entry<UXHud>();
			swapItem.Close();
		}

		private void OnEscape(InputAction.CallbackContext obj)
		{
			if (obj.performed)
				UXService.Entry<UXHud>();
			swapItem.Close();
		}

		private async void ReBuild()
		{
			await UniTask.NextFrame();
			if(swapItem.TryGetCurrentContainer(out var container))
				ReBuild(container);
		}
		private void ReBuild(IBasicItemContainer other)
		{
			otherContainer.Clear();
			selfContainer.Clear();
			foreach (var item in other.GetItems())
			{
				var container = otherContainer.Create(itemPrefab);
				UXUtils.CreateItemContainer(container, item);
				container.Q<Button>().clicked += () => swapItem.Add(item);
				
			}
			foreach (var item in inventory.GetItems())
			{
				var container = selfContainer.Create(itemPrefab);
				UXUtils.CreateItemContainer(container, item);
				container.Q<Button>().clicked += () => swapItem.Remove(item);
			}
		}
	}
}