/*
 * EscapeScreen.cs
 * Authors: Karl Orosz, Brian Chesborough
 * Copyright (c) 2007-2008 Cornell University

 This program is free software; you can redistribute it and/or
 modify it under the terms of the GNU General Public License
 as published by the Free Software Foundation; either version 2
 of the License, or (at your option) any later version.

 This program is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 GNU General Public License for more details.

 You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
*/

using System;
using System.Collections.Generic;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using tAC_Engine.Graphics.Entities;
using Util;

namespace StarJack
{
	/// <summary>
	/// This is the main type for your game
	/// </summary>
	public class EscapeScreen : GameScreen
	{
		public const String TextureDirectory = @"Texture\";

		private readonly List<string> mMenuItems = new List<string>();
		private int mItemSelected;
		private SpriteBatch mSpriteBatch;
		private SpriteFont mSpriteFont;

		public int curWorld;
		public int curLevel;
		public int curRoom;

		private Entity mBackground;
		private Entity mMenuBackground;

		private InputHandler inputHandler;

		//The list of the components that this screen will own
		private List<GameComponent> mComponents = new List<GameComponent>();

		/// <summary>
		/// Allows the game to perform any initialization it needs to before starting to run.
		/// This is where it can query for any required services and load any non-graphic
		/// related content.  Calling base.Initialize will enumerate through any components
		/// and initialize them as well.
		/// </summary>
		public override void Initialize()
		{
            Entity.RootDirectory = RootDirectory;

			inputHandler = GetInputHandler();

			mMenuItems.Add("Continue");
			mMenuItems.Add("Mini Game Selection");
			mMenuItems.Add("Exit");

			inputHandler.Initialize();

            inputHandler.BindButton(Keys.Down, Trigger.Activated, (int)EventCode.MenuDown);
            inputHandler.BindButton(Keys.Up, Trigger.Activated, (int)EventCode.MenuUp);
            inputHandler.BindButton(Keys.Enter, Trigger.Activated, (int)EventCode.MenuSelect);
            inputHandler.BindButton(Keys.Escape, Trigger.Activated, (int)EventCode.MenuCancel);

			mBackground = new Entity("Back");
			mBackground.TextureName = "Square";
			mBackground.Width = 800;
			mBackground.Height = 600;
			mBackground.Color = new Color(0, 0, 0, 155);
			mBackground.X = 0;
			mBackground.Y = 0;

			mMenuBackground = new Entity("MenuBack");
			mMenuBackground.TextureName = "Wires";
			mMenuBackground.X = 200;
			mMenuBackground.Y = 200;
			mMenuBackground.Width = 200;
			mMenuBackground.Height = 200;

			base.Initialize();

#if DEBUG
            ShowFPS();
#endif
		}

		/// <summary>
		/// LoadContent will be called once per game and is the place to load
		/// all of your content.
		/// </summary>
		protected override void LoadContent()
		{
			mSpriteBatch = new SpriteBatch(GraphicsDevice);
			foreach (GameComponent gc in mComponents)
			{
				EntitySprite s = gc as EntitySprite;
				if (s != null)
				{
					s.SpriteBatch = mSpriteBatch;
				}
			}

			mSpriteFont = Content.Load<SpriteFont>(@"Fonts\menufont");

			mMenuBackground.LoadContent(Content);
			mBackground.LoadContent(Content);

			base.LoadContent();
		}

		/// <summary>
		/// UnloadContent will be called once per game and is the place to unload
		/// all content.
		/// </summary>
		protected override void UnloadContent()
		{
			base.UnloadContent();
		}

		public override void Reinitialize()
		{
			inputHandler.Enable();
			Enabled = true;
			Visible = true;
		}

		protected override void Dispose(bool disposing)
		{
			if (disposing)
			{
				mSpriteBatch.Dispose();
			}
			base.Dispose(disposing);
		}

		/// <summary>
		/// Allows the game to run logic such as updating the world,
		/// checking for collisions, gathering input, and playing audio.
		/// </summary>
		/// <param name="gameTime">Provides a snapshot of timing values.</param>
		public override void Update(GameTime gameTime)
		{
			base.Update(gameTime);
			while (inputHandler.HasEvent())
			{
				InputEvent e = inputHandler.GetNextEvent();

				switch ((EventCode)e.EventCode)
				{
					case EventCode.MenuDown:
						mItemSelected = (mItemSelected + 1) % mMenuItems.Count;
						//SoundManager.SoundManager.PlayEffect("Menu_Move");
						break;

					case EventCode.MenuUp:
						mItemSelected = (mItemSelected - 1 + mMenuItems.Count) % mMenuItems.Count;
						//SoundManager.SoundManager.PlayEffect("Menu_Move");
						break;

					case EventCode.MenuSelect:
						//SoundManager.SoundManager.PlayEffect("Menu_Select");
						if (mMenuItems[mItemSelected] == "Continue")
						{
							Done();
						}
						else if (mMenuItems[mItemSelected] == "Mini Game Selection")
						{
							Done();
						}
						else if (mMenuItems[mItemSelected] == "Exit")
						{
							Exit();

						}
						break;

					case EventCode.MenuCancel:
						Done();
						break;
				}
			}
		}

		/// <summary>
		/// This is called when the game should draw itself.
		/// </summary>
		/// <param name="gameTime">Provides a snapshot of timing values.</param>
		public override void Draw(GameTime gameTime)
		{
			base.Draw(gameTime);

			Vector2 location = new Vector2(200, 200);
			Vector2 shadow = new Vector2(202, 202);

			mBackground.Draw(mSpriteBatch);
			mMenuBackground.Draw(mSpriteBatch);

			mSpriteBatch.Begin();

			mSpriteBatch.DrawString(mSpriteFont, StarJackInfo.Name, shadow, Color.Black);
			mSpriteBatch.DrawString(mSpriteFont, StarJackInfo.Name, location, Color.BurlyWood);

			for (int i = 0; i < mMenuItems.Count; ++i)
			{
				location.Y += 75;
				shadow.Y += 75;
				mSpriteBatch.DrawString(mSpriteFont, mMenuItems[i], shadow, Color.Black);
				if (i == mItemSelected)
				{
					mSpriteBatch.DrawString(mSpriteFont, mMenuItems[i], location, Color.Yellow);
				}
				else
				{
					mSpriteBatch.DrawString(mSpriteFont, mMenuItems[i], location, Color.White);
				}
			}
			mSpriteBatch.End();
		}
	}
}