using UnityEngine;
using Assets.Code.States;
using Assets.Code.Interfaces;

public class StateManager : MonoBehaviour
{
  private IStateBase activeState;
  
  [HideInInspector]
  public GameData gameDataRef;
  
  private static StateManager instanceRef;
  
  void Awake ()
  {
    if(instanceRef == null)
    {
      instanceRef = this;
      DontDestroyOnLoad(gameObject);
    }
    else
    {
      DestroyImmediate(gameObject);
    }
  }

  void Start ()
  {
    activeState = new BeginState(this);
    gameDataRef = GetComponent<GameData>();
  }

    void Update()
    {
    if (activeState != null)
          activeState.StateUpdate();
    }

  void OnGUI()
  {
    if(activeState != null)
      activeState.ShowIt();
  }

    public void SwitchState(IStateBase newState)
    {
        activeState = newState;
    }
  
  public void Restart()
  {
    Destroy(gameObject);
    Application.LoadLevel("Scene0");
  }
}