using UnityEngine;
using System.Collections;

[ExecuteInEditMode]
public class MenuManager : MonoBehaviour {
	public MenuLayer activeMenu;
	public MenuLayer previousMenu;
	private MenuLayer[] menuArray;
	// Use this for initialization
	void Start () {
		menuArray = GameObject.FindObjectsOfType<MenuLayer> ();
		foreach (var m in menuArray) {
			m.manager = this;
			Debug.Log("Found menu: " + m.Name);
		}
	}
	
	// Update is called once per frame
	void Update () {
	
	}

	public MenuLayer GetMenu(string menuName){
		if (string.IsNullOrEmpty (menuName)) {
			return null;
		}
		foreach (var m in menuArray) {
			if(m.Name == menuName){
				return m;
			}
		}
		return null;
	}

	public void ActivateMenu(string menu){
		var nextMenu = GetMenu (menu);
		if (activeMenu == nextMenu) {
			return;
		}

		if (activeMenu != null) {
			activeMenu.Leave();
		}
		previousMenu = activeMenu;
		activeMenu = nextMenu;
		if (nextMenu != null) {
			nextMenu.Enter();
		}
	}

	public void ActivatePreviousMenu(){
		ActivateMenu (previousMenu == null ? "" : previousMenu.Name);
	}

	/*void OnGUI(){
		if (activeMenu == null) {
			return;
		}
		activeMenu.Draw ();
	}*/
}