using UnityEngine;

public interface IState
{
    public void Enter(StateHandler excutor);
    public void Excute();
    public void Exit();
}

public class StateHandler : MonoBehaviour
{
    public IState CurrentState { get; private set; }   

    void Update()
    {
        if (CurrentState is null) return;
        CurrentState.Excute();
    }

    public void ChangeState(IState state)
    {
        if(CurrentState != null)
        {
            CurrentState.Exit();
        }

        CurrentState = state;
        CurrentState?.Enter(this);
    }
}