#region File Description
//-----------------------------------------------------------------------------
// MainMenuScreen.cs
//
// Microsoft XNA Community Game Platform
// Copyright (C) Microsoft Corporation. All rights reserved.
//-----------------------------------------------------------------------------
#endregion

#region Using Statements
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Net;

#endregion

namespace NetworkStateManagement
{
	/// <summary>
	/// The main menu screen is the first thing displayed when the game starts up.
	/// </summary>
	class MainMenuScreen : MenuScreen
	{
	#region Initialization


		/// <summary>
		/// Constructor fills in the menu contents.
		/// </summary>
		public MainMenuScreen ()
		: base(Resources.MainMenu)
			{
			// Create our menu entries.
			MenuEntry singlePlayerMenuEntry = new MenuEntry (Resources.SinglePlayer);
			MenuEntry liveMenuEntry = new MenuEntry (Resources.PlayerMatch);
			MenuEntry systemLinkMenuEntry = new MenuEntry (Resources.SystemLink);
			MenuEntry exitMenuEntry = new MenuEntry (Resources.Exit);

			// Hook up menu event handlers.
			singlePlayerMenuEntry.Selected += SinglePlayerMenuEntrySelected;
			liveMenuEntry.Selected += LiveMenuEntrySelected;
			systemLinkMenuEntry.Selected += SystemLinkMenuEntrySelected;
			exitMenuEntry.Selected += OnCancel;

			// Add entries to the menu.
			MenuEntries.Add (singlePlayerMenuEntry);
			MenuEntries.Add (liveMenuEntry);
			MenuEntries.Add (systemLinkMenuEntry);
			MenuEntries.Add (exitMenuEntry);
		}


	#endregion

	#region Handle Input


		/// <summary>
		/// Event handler for when the Single Player menu entry is selected.
		/// </summary>
		void SinglePlayerMenuEntrySelected (object sender, PlayerIndexEventArgs e)
		{
			LoadingScreen.Load (ScreenManager, true, e.PlayerIndex, 
				new GameplayScreen (null));
		}


		/// <summary>
		/// Event handler for when the Live menu entry is selected.
		/// </summary>
		void LiveMenuEntrySelected (object sender, PlayerIndexEventArgs e)
		{
			CreateOrFindSession (NetworkSessionType.PlayerMatch, e.PlayerIndex);
		}


		/// <summary>
		/// Event handler for when the System Link menu entry is selected.
		/// </summary>
		void SystemLinkMenuEntrySelected (object sender, PlayerIndexEventArgs e)
		{
			CreateOrFindSession (NetworkSessionType.SystemLink, e.PlayerIndex);
		}


		/// <summary>
		/// Helper method shared by the Live and System Link menu event handlers.
		/// </summary>
		void CreateOrFindSession (NetworkSessionType sessionType,
				PlayerIndex playerIndex)
		{
			// First, we need to make sure a suitable gamer profile is signed in.
			ProfileSignInScreen profileSignIn = new ProfileSignInScreen (sessionType);

			// Hook up an event so once the ProfileSignInScreen is happy,
			// it will activate the CreateOrFindSessionScreen.
			profileSignIn.ProfileSignedIn += delegate
		{
		GameScreen createOrFind = new CreateOrFindSessionScreen (sessionType);

		ScreenManager.AddScreen (createOrFind, playerIndex);
		};

			// Activate the ProfileSignInScreen.
			ScreenManager.AddScreen (profileSignIn, playerIndex);
		}


		/// <summary>
		/// When the user cancels the main menu, ask if they want to exit the sample.
		/// </summary>
		protected override void OnCancel (PlayerIndex playerIndex)
		{
			MessageBoxScreen confirmExitMessageBox = 
				new MessageBoxScreen (Resources.ConfirmExitSample);

			confirmExitMessageBox.Accepted += ConfirmExitMessageBoxAccepted;

			ScreenManager.AddScreen (confirmExitMessageBox, playerIndex);
		}


		/// <summary>
		/// Event handler for when the user selects ok on the "are you sure
		/// you want to exit" message box.
		/// </summary>
		void ConfirmExitMessageBoxAccepted (object sender, PlayerIndexEventArgs e)
		{
			ScreenManager.Game.Exit ();
		}


	#endregion
	}
}