using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using BITKit.Entities;
using BITKit.StateMachine;
using UnityEngine;

namespace BITKit.Entities
{
	public class StateBasedBehavior<T> : EntityBehavior,IStateMachine<T> where T : IState
	{
		[SerializeField] private MonoStateMachine<T> stateMachine;
		public bool Enabled
		{
			get => stateMachine.Enabled;
			set => stateMachine.Enabled = value;
		}

		public T CurrentState
		{
			get => stateMachine.CurrentState;
			set => stateMachine.CurrentState = value;
		}

		public event Action<T, T> OnStateChanged
		{
			add => stateMachine.OnStateChanged += value;
			remove => stateMachine.OnStateChanged -= value;
		}

		public event Action<T> OnStateRegistered;
		public event Action<T> OnStateUnRegistered;
		public IDictionary<Type, T> StateDictionary => stateMachine.StateDictionary;
		public override void OnAwake()
		{
			base.OnAwake();
			if (stateMachine is null)
			{
				Debug.LogWarning(GetType().Name);
			}
			else
			{
				foreach (var x in stateMachine.states)
				{
					Entity.Inject(x);
				}
				stateMachine.Initialize();
			}
		}
		void IStateMachine<T>.Initialize()
		{
			stateMachine.Initialize();
		}
		public void UpdateState(float deltaTime)
		{
			stateMachine.UpdateState(deltaTime);
		}
		public void DisposeState()
		{
			stateMachine.DisposeState();
		}

		public void TransitionState<State>() where State : T
		{
			stateMachine.TransitionState<State>();
		}

		public void TransitionState(T state)
		{
			stateMachine.TransitionState(state);
		}
		
		public virtual void Register(T newState)
		{
			Entity.Inject(newState);
			StateMachineUtils.Register(this, newState);
		}

		public virtual void UnRegister(T newState)=>StateMachineUtils.UnRegister(this,newState);
		public void InvokeOnStateRegistered(T state)
		{
			OnStateRegistered?.Invoke(state);
		}

		public void InvokeOnStateUnRegistered(T state)
		{
			OnStateUnRegistered?.Invoke(state);
		}
	}

}