using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Threading;
using BITKit;
using BITKit.Entities;
using BITKit.StateMachine;
using BITKit.UX;
using Cysharp.Threading.Tasks;
using Microsoft.Extensions.DependencyInjection;
using Net.Project.B.Inventory;
using Net.Project.B.Item;
using Project.B.Entities;
using Project.B.Item;
using Project.B.Player;
using UnityEngine;
using UnityEngine.InputSystem;
using UnityEngine.InputSystem.XR.Haptics;
using UnityEngine.UIElements;

namespace Net.Project.B.PDA
{
    [Serializable]
    public struct AppControllerClass : IScriptableControllerClass
    {
        
    }
    public class UnityPDAService:UIToolKitPanel, IPDAService
    {
        private readonly IServiceProvider _serviceProvider;
        private readonly IManagedItemService _managedItemService;
        private readonly IUXKeyMap<InputAction> _uxKeyMap;
        protected override string DocumentPath => "ui_pda";
        public override bool AllowCursor => true;
        public override bool CloseWhenClickOutside => true;
        [UXBindPath("pda-container")] private VisualElement _pdaContainer;
        [UXBindPath("dock-container")] private VisualElement _dockContainer;
        [UXBindPath("app-container")] private VisualElement _appContainer;
        [UXBindPath("home-button")] private Button _homeButton;
        
        [Inject]
        private IPlayerWeaponInventory _playerWeaponInventory;

        [Inject] private IPlayerInventory _playerInventory;

        private readonly HashSet<int> _pdaItems = new();

        private VisualTreeAsset _appTemplate;
        
        private readonly Dictionary<string,IAppClass> _routes = new();

        private CancellationTokenSource _operatorCts = new();
        private readonly ValidHandle _operatorHandle = new();
        
        private readonly HashSet<object> _initiated = new();

        private readonly Dictionary<string, VisualElement> _appLaunchers = new();

        private IAppClass _currentAppClass;
        private string _currentUrl;

        public UnityPDAService(IUXService uxService, IPlayerFactory playerFactory, IEntitiesService entitiesService, IManagedItemService managedItemService, IUXKeyMap<InputAction> uxKeyMap, IServiceProvider serviceProvider) : base(uxService)
        {
            _managedItemService = managedItemService;
            _uxKeyMap = uxKeyMap;
            _serviceProvider = serviceProvider;

            playerFactory.OnEntityCreated += OnEntityCreated;

            foreach (var scriptableItem in entitiesService.QueryComponents<ScriptableItem>())
            {
                if (scriptableItem.ControllerClass is AppControllerClass)
                {
                    _pdaItems.Add(scriptableItem.Id);
                }
            }

            OnInitiatedAsync += InitiatedAsync;

            foreach (var appClass in _serviceProvider.GetServices<IAppClass>())
            {
                foreach (var path in appClass.Routes)
                {
                    _routes.Add(path,appClass);
                }
            }
        }

        private  UniTask InitiatedAsync()
        {
            _appTemplate = _appContainer.Q<TemplateContainer>().templateSource;
            _appContainer.Clear();

            foreach (var appClass in _serviceProvider.GetServices<IAppClass>())
            {
                var app = (IApp)Activator.CreateInstance(appClass.AppType);
                
                var container = _appContainer.Create(_appTemplate);
                container.Get<Label>().text = app.AppName;

                container.Get<VisualElement>().AddToClassList(app.PackageName.Replace(".", "-"));

                container.Get<Button>().clicked += () =>
                {
                    container.RemoveFromClassList("allow-badge");
                    var type = typeof(IAppClass<>).MakeGenericType(app.GetType());
                    var service = (IAppClass)_serviceProvider.GetRequiredService(type);
                    Navigate(service!.Routes[0]).Forget();
                };

                var packageName = Activator.CreateInstance(appClass.AppType).As<IApp>().PackageName;

                _appLaunchers[packageName] = container;
            }

            _homeButton.clicked += ()=>Home().Forget();
            
            #if 	UNITY_STANDALONE_WIN
            var wallpaperPath = GetWindowsWallPaper.GetWallpaperPath();

            if (System.IO.File.Exists(wallpaperPath))
            {
                byte[] imageData = System.IO.File.ReadAllBytes(wallpaperPath);
                Texture2D texture = new Texture2D(2, 2);
                if (texture.LoadImage(imageData))
                {
                    RootVisualElement.Get<VisualElement>().style.backgroundImage = new StyleBackground(texture);
                }
            }
            #endif
            
            return UniTask.CompletedTask;
        }

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

        private void OnCancel(InputAction.CallbackContext obj)
        {
            if (obj.JustPressed())
            {
                OnReturn();
            }
        }

        protected override void OnPanelExit()
        {
            base.OnPanelExit();
            InputActionGroup.UnRegisterCallback(_uxKeyMap.CancelKey, OnCancel);
            InputActionGroup.UnRegisterCallback(_uxKeyMap.InventoryKey, OnCancel);
        }

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

            _playerWeaponInventory.StateMachine.OnStateChanged += OnStateChanged;
            
            return UniTask.CompletedTask;
        }

        private void OnStateChanged(IPlayerWeaponController arg1, IPlayerWeaponController arg2)
        {
            if(arg2 is null)return;
            if(_managedItemService.Items.TryGetValue(arg2.Identifier,out var item) is false && _playerInventory.Container.ItemDictionary.TryGetValue(arg2.Identifier,out item) is false)return;
            if(_pdaItems.Contains(item.ScriptableId) is false)return;
            UXService.Entry(this);
        }
        public async UniTask Navigate(string url)
        {
            _operatorCts.Cancel();
            _operatorCts = new();

            await _operatorHandle;
            using var _ = _operatorHandle.GetHandle();
            
            if (_routes.TryGetValue(url, out var appClass) is false)return;

            var prevClass = _currentAppClass;

            if (prevClass is not null)
            {
                prevClass.Enabled = false;
                await prevClass.OnStateExitAsync(prevClass,appClass);
                prevClass.OnStateExit(prevClass,appClass);
            }
            
            if(_operatorCts.IsCancellationRequested)return;

            _currentAppClass = appClass;

            if (_initiated.Add(appClass))
            {
                await appClass.InitializeAsync();
                appClass.Initialize();
            }

            appClass.Enabled = true;

            var prevUrl = _currentUrl;
            
            var page=await appClass.GetPage(_currentUrl = url);
            if (page is VisualElement visualElement)
            {
                _pdaContainer.Add(visualElement);
            }
            
            appClass.OnStateEntryAsync(prevClass);
            appClass.OnStateEntry(prevClass);

            await OnNavigatedAsync.UniTaskFunc(prevUrl, url);
            OnNavigated?.Invoke(prevUrl,url);
        }
        public async UniTask Home()
        {
            
            _operatorCts.Cancel();
            _operatorCts = new();
            
            await _operatorHandle;
            using var _ = _operatorHandle.GetHandle();

            if (_currentAppClass is not null)
            {
                _currentAppClass.Enabled = false;
                
                await _currentAppClass.OnStateExitAsync(_currentAppClass,null);
                _currentAppClass.OnStateExit(_currentAppClass,null);
           
                _currentAppClass = null;
            }
            
            _pdaContainer.Clear();
        }
        public async UniTask Back()
        {
            _operatorCts.Cancel();
            _operatorCts = new();
            
            await _operatorHandle;
            using var _ = _operatorHandle.GetHandle();
        }

        public void Badge(string packageName)
        {
            if (_currentAppClass is not null)
            {
                var app = Activator.CreateInstance(_currentAppClass.AppType).As<IApp>().PackageName;
                if(string.Equals(app,packageName))return;
            }
            _appLaunchers[packageName].AddToClassList("allow-badge");
        }

        public event Action<string, string> OnNavigated;
        public event Func<string, string, UniTask> OnNavigatedAsync;
        public event Action<string> OnNotification;
        public void Notify(string message)
        {
            OnNotification?.Invoke(message);
        }
    }
}