using System;
using System.Collections.Generic;
using UnityEngine;
using System.Linq;
using System.Reflection;
using System.Threading;
using BITKit.Core.Entites;
using Cysharp.Threading.Tasks;
using UnityEngine.UIElements;
// ReSharper disable RedundantTypeArgumentsOfMethod

namespace BITKit.Entities
{
    public class Entity : MonoBehaviour, IEntity
    {
       private readonly GenericEvent genericEvent = new();
       private readonly Processor processor = new();
        public IEntityComponent[] entityComponents { get; set; }
        public ulong Id { get; private set; }
        private CancellationToken _cancellationToken;
        private bool isInitialized;
        private void Awake()
        {
            Id = (ulong)Guid.NewGuid().GetHashCode();
            _cancellationToken = gameObject.GetCancellationTokenOnDestroy();
            Set(_cancellationToken);
            foreach (var serviceRegister in GetComponentsInChildren<IServiceRegister>(true))
            {
                genericEvent.Set(serviceRegister.BaseType, serviceRegister);
            }
            entityComponents = GetComponentsInChildren<IEntityComponent>(true).Distinct().ToArray();
            foreach (var x in entityComponents)
            {
                foreach (var att in x.GetType().GetCustomAttributes<CustomTypeAttribute>())
                {
                    genericEvent.Set(att.Type, x);
                }
            }
            entityComponents.ForEach(x => x.Initialize(this));
            UnityEntitiesService.Register(this);
        }
        private void Start()
        {
            entityComponents.ForEach(x => x.OnAwake());
            entityComponents.ForEach(x => x.OnStart());
            isInitialized = true;
        }
        private void OnDestroy()
        {
            if (isInitialized)
            {
                entityComponents.ForEach(x => x.OnDestroyComponent());
            }
            UnityEntitiesService.UnRegister(this);
        }
        private void Update()
        {
            entityComponents.ForEach(x => x.OnUpdate(Time.deltaTime));
        }
        private void FixedUpdate()
        {
            entityComponents.ForEach(x => x.OnFixedUpdate(Time.fixedDeltaTime));
        }
        private void LateUpdate()
        {
            entityComponents.ForEach(x => x.OnLateUpdate(Time.deltaTime));
        }
        public void AddListener<T>(Action<T> action) => genericEvent.AddListener<T>(action);
        public void Invoke<T>(T value) => genericEvent.Invoke<T>(value);
        public void RemoveListener<T>(Action<T> action) => genericEvent.RemoveListener<T>(action);
        public void AddListener<T>(string key, Action<T> action) => genericEvent.AddListener<T>(key, action);
        public void Invoke<T>(string key, T value) => genericEvent.Invoke<T>(key, value);
        public void Invoke<T>() where T : new() => genericEvent.Invoke<T>();
        public void RemoveListener<T>(string key, Action<T> action) => genericEvent.RemoveListener<T>(key, action);
        public T Get<T>(string key = Constant.System.Internal)
        {
            var value = genericEvent.Get<T>(key);
            if (value is not null || !typeof(T).IsAssignableFrom(typeof(Component))) return value;
            if (!TryGetComponent<T>(out var component)) return default(T);
            Set<T>(component);
            return component;
        }
        public void Set<T>(T value) => genericEvent.Set<T>(value);
        public void Set<T>(string key = Constant.System.Internal, T value = default) => genericEvent.Set<T>(key, value);
        public T GetContext<T>(T value = default) => processor.GetContext<T>(value);
        public void AddProcessor<T>(Func<T, T> func) => processor.AddProcessor<T>(func);
        public void RemoveProcessor<T>(Func<T, T> func) => processor.RemoveProcessor<T>(func);
        public T GetContext<T>(string key, T value) => processor.GetContext<T>(value);
        public void AddProcessor<T>(string key, Func<T, T> func) => processor.AddProcessor<T>(key, func);
        public void RemoveProcessor<T>(string key, Func<T, T> func) => processor.RemoveProcessor<T>(key, func);

        public void RegisterCallback<T>(T t)
        {
            var value = GetCallbacks<T>() as List<T>;
            value!.Add(t);
        }

        public void UnRegisterCallback<T>(T t)
        {
            var value = GetCallbacks<T>() as List<T>;
            value!.Remove(t);
        }

        public IEnumerable<T> GetCallbacks<T>()
        {
            var value = Get<List<T>>(nameof(ICallback)).CreateOrAddIfEmety(() =>
            {
                List<T> newList = new();
                Set<List<T>>(nameof(ICallback), newList);

                return newList;
            });
            if (value is null)
            {
                Debug.LogWarning("List is Null");
            }
            return value;
        }

        
    }
#if UNITY_EDITOR
    [UnityEditor.CustomEditor(typeof(Entity))]
    public class EntityInspector : BITInspector<Entity>
    {
        public override VisualElement CreateInspectorGUI()
        {
            FillDefaultInspector();
            CreateSubTitle("Identity");
            var idLabel = root.Create<Label>();
            idLabel.text = agent.Id.ToString();
            return root;
        }
    }
#endif
}