using System;
using System.Collections;
using System.Collections.Generic;
using BITKit;
using BITKit.Entities;
using BITKit.Mod;
using BITKit.UX;
using BITKit.WorldNode;
using Cysharp.Threading.Tasks;
using Net.Project.B.Interaction;
using Net.Project.B.Inventory;
using Net.Project.B.Item;
using Net.Project.B.UX;
using Project.B.Entities;
using Project.B.Player;
using UnityEngine;
using UnityEngine.InputSystem;
using UnityEngine.UIElements;

namespace Project.B.UX
{
    public class UXInventorySwap : UIToolKitPanel,IUXInventorySwap
    {
        public override bool AllowCursor => true;
        public override bool CloseWhenClickOutside => true;

        private readonly IUXItemInspector _itemInspector;
        private readonly IUXKeyMap<InputAction> _uxKeyMap;
        private readonly IPlayerFactory _playerFactory;
        private readonly IWorldInteractionService _interactionService;
        private readonly IEntitiesService _entitiesService;
        protected override string DocumentPath => "ui_inventory_swap";

        private VisualTreeAsset _template;
        
        [Inject]
        private IPlayerInventory _playerInventory;

        [UXBindPath("self-container")]
        private VisualElement _selfContainer;

        [UXBindPath("target-container")]
        private VisualElement _targetContainer;

        [UXBindPath("weapon-container",true)]
        private VisualElement _weaponContainer;

        [UXBindPath("preview-container", true)]
        private VisualElement _previewContainer;

        [UXBindPath("self-label")]
        private Label _selfLabel;

        [UXBindPath("target-label")]
        private Label _targetLabel;

        private IRuntimeItemContainer _targetItemContainer;
        
        public UXInventorySwap(IUXService uxService, IPlayerFactory playerFactory, IWorldInteractionService interactionService, IEntitiesService entitiesService, IUXKeyMap<InputAction> uxKeyMap, IUXItemInspector itemInspector) : base(uxService)
        {
            _playerFactory = playerFactory;
            _interactionService = interactionService;
            _entitiesService = entitiesService;
            _uxKeyMap = uxKeyMap;
            _itemInspector = itemInspector;
            OnInitiatedAsync += InitiatedAsync;
            
            _playerFactory.OnEntityCreated += OnEntityCreated;

            _interactionService.OnInteraction += OnInteraction;
        }

        private void OnInteraction(object arg1, IWorldInteractable arg2, WorldInteractionProcess arg3, object arg4)
        {
            if (arg3 is WorldInteractionProcess.Performed or WorldInteractionProcess.System is false) return;

            if (_entitiesService.TryGetEntity(arg2.Id, out var entity) is false) return;

            if (entity.ServiceProvider.QueryComponents(out IRuntimeItemContainer container) is false) return;

            _targetItemContainer = container;

            UXService.Entry(this);
        }

        private UniTask OnEntityCreated(string arg1, IEntity arg2)
        {
            arg2.Inject(this);
            return UniTask.CompletedTask;
        }

        private async UniTask InitiatedAsync()
        {
            _template =await ModService.LoadAsset<VisualTreeAsset>("ux_item_template");

            _weaponContainer ??= _targetContainer;

            if (_previewContainer is not null)
            {
                _previewContainer.style.backgroundImage = null;
            }
        }

        public override async UniTask EntryAsync()
        {
            _selfContainer.Clear();
            _weaponContainer.Clear();
            _targetContainer.Clear();
            
            await base.EntryAsync();

            await Rebuild();
        }

        private async UniTask Rebuild()
        {
            _selfContainer.Clear();
            _weaponContainer.Clear();
            _targetContainer.Clear();
            
             if(_targetItemContainer is null)return;

            foreach (var item in _playerInventory.Container.GetItems())
            {
                var container = _selfContainer.Create(_template);
                
                container.parent.SetEnabled(_targetItemContainer.AllowAdd);

                UXInventoryUtils.Setup(container, item).Forget();

                container.Get<Button>().clicked += () =>
                {
                    try
                    {
                        if (_playerInventory.Container.Remove(item.Id) is false)
                        {
                            return;
                        }

                        if (_targetItemContainer.Add(item) is false)
                        {
                            return;
                        }
                    }
                    catch (PlayerInventoryAddItemOverridden)
                    {

                    }
                    Rebuild().Forget();
                };
                
                Setup(container,item);
                
                container.Get<Button>().RegisterCallback<MouseDownEvent>(evt =>
                {
                    if(evt.button is not 1)return;
                      
                    ContextMenuBuilder
                        .Create()
                        .BuildText("操作")
                        .BuildAction("检视", () =>_itemInspector.Inspect(item))
                        .BuildAction("丢下", () =>
                        {
                            if (_playerInventory.Container.Drop(item.Id))
                            {
                                Rebuild().Forget();
                            }
                          
                        })
                        .Build();
                });
            }
            

            foreach (var item in _targetItemContainer.GetItems())
            {
                var scriptableItem =await UXInventoryUtils.GetScriptableItem(item.ScriptableId);
                
                var container =(scriptableItem is ScriptableWeapon{WeaponSlot:1 or 2} ? _weaponContainer : _targetContainer).Create(_template);
                
                container.parent.SetEnabled(_targetItemContainer.AllowRemove);

                UXInventoryUtils.Setup(container,item).Forget();

                container.Get<Button>().clicked += Take;
                
                Setup(container,item);

                container.Get<Button>().RegisterCallback<MouseDownEvent>(evt =>
                {
                    ContextMenuBuilder
                        .Create()
                        .BuildText("操作")
                        .BuildAction("检视", () =>_itemInspector.Inspect(item))
                        .BuildAction("拿起", Take)
                        .Build();
                });
                
                var isWide = scriptableItem is ScriptableWeapon { WeaponSlot: (int)PlayerWeaponSlot.Primary or (int)PlayerWeaponSlot.Secondary or (int)PlayerWeaponSlot.Sidearm};

                if (isWide)
                {
                    container.style.width = 200;
                }
                
                void Take()
                {
                    try
                    {
                        if (_targetItemContainer.Remove(item.Id) is false)
                        {
                            return;
                        }
                        
                        if (_playerInventory.Container.Add(item) is false)
                        {
                            return;
                        }
                        
                    }
                    catch (PlayerInventoryAddItemOverridden)
                    {

                    }
                    Rebuild().Forget();
                }
            }

            return;

            void Setup(VisualElement container, IRuntimeItem runtimeItem)
            {
                if(_previewContainer is null)return;

                async void Callback(PointerEnterEvent x)
                {
                    var item = await UXInventoryUtils.GetScriptableItem(runtimeItem.ScriptableId);

                    _previewContainer.style.backgroundImage = new(item.Icon);
                }

                container.Get<Button>().RegisterCallback<PointerEnterEvent>(Callback);    
            }
            
        }

        protected override void OnPanelEntry()
        {
            base.OnPanelEntry();
            InputActionGroup.RegisterCallback(_uxKeyMap.CancelKey, OnReturn);
            InputActionGroup.RegisterCallback(_uxKeyMap.InventoryKey, OnReturn);

            if (_targetItemContainer is not null)
            {
                _targetItemContainer.IsBusy.AddElement(this);
            }
        }

        protected override void OnPanelExit()
        {
            base.OnPanelExit();
            InputActionGroup.UnRegisterCallback(_uxKeyMap.CancelKey, OnReturn);
            InputActionGroup.UnRegisterCallback(_uxKeyMap.InventoryKey, OnReturn);
            
            _selfContainer.Clear();
            _targetContainer.Clear();
            _weaponContainer.Clear();
            
            if (_targetItemContainer is not null)
            {
                _targetItemContainer.IsBusy.RemoveElement(this);
            }
        }

        private void OnReturn(InputAction.CallbackContext obj)
        {
            if (obj.JustPressed() is false) return;
            
            
            UXService.Return();
        }

        public override void Dispose()
        {
            base.Dispose();
            OnInitiatedAsync -= InitiatedAsync;

            _playerFactory.OnEntityCreated -= OnEntityCreated;


            _interactionService.OnInteraction -= OnInteraction;
        }
    }

}