using System;
using System.Collections;
using System.Collections.Generic;
using UnityEngine;
using Unity.VisualScripting;
using UnityEngine.Events;
using System.Linq;
using UnityEngine.UIElements;

namespace BITKit.Entities
{

    [Inspectable]
    public class Entity : MonoBehaviour, IEntity
    {
        public string addressablePath="Entity";
        GenericEvent genericEvent = new();
        Processor processor = new();
        public IEntityComponent[] entityComponents { get; set; }
        public int Id
        {
            get
            {
                if (id is 0)
                {
                    id = Guid.NewGuid().GetHashCode();
                }
                return id;
            }
            set
            {
                if (id != value)
                {
                    id = value;
                    EntitiesManager.Dictionary.TryRemove(id, out var _);
                    EntitiesManager.GetOrAdd(id, x => this);
                }
            }
        }
        int id;

        protected virtual void Awake()
        {
            entityComponents = GetComponentsInChildren<IEntityComponent>(true);
            entityComponents.ForEach(x => x.Initialize(this));
        }
        protected virtual void Start()
        {
            entityComponents.ForEach(x => x.OnAwake());
            entityComponents.ForEach(x => x.OnStart());
            EntitiesManager.Dictionary.AddOrUpdate(id, (x) => this, (x1, x2) => this);
        }
        protected virtual void OnDestroy()
        {
            entityComponents.ForEach(x => x.OnDestroyComponent());
            EntitiesManager.Dictionary.TryRemove(id, out var _);
        }
        protected virtual void Update()
        {
            entityComponents.ForEach(x => x.OnUpdate(Time.deltaTime));
        }
        protected virtual void FixedUpdate()
        {
            entityComponents.ForEach(x => x.OnFixedUpdate(Time.fixedDeltaTime));
        }
        protected virtual 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 null && typeof(T).IsAssignableFrom(typeof(Component)))
            {
                if (TryGetComponent<T>(out var component))
                {
                    Set<T>(component);
                    return component;
                }
            }
            return value;
        }
        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;
        }

        public int[] GetInts() => new int[] { id };
        public float[] GetFloats() => null;
        public byte[] GetBytes() => null;

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