using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;

namespace SuperPolarity
{
    static class ScreenManager
    {
        static Stack<Screen> Screens;
        static SuperPolarity Game;

        static ScreenManager()
        {
            Screens = new Stack<Screen>();
        }

        static public void Push(Screen screen)
        {
            Screens.Push(screen);
        }

        static public void Pop()
        {
            Screens.Pop();
        }

        static public void Update(GameTime gameTime)
        {
            Screens.Peek().Update(gameTime);
        }

        static public void Draw(SpriteBatch spriteBatch)
        {
            foreach (Screen screen in Screens)
            {
                screen.Draw(spriteBatch);
            }
        }

        internal static void SetGame(SuperPolarity game)
        {
            Game = game;
        }
    }
}