#region File Description

/* SmlProgram.cs

 * Sets up and runs SML

 * Version 1.1

 * */

#endregion



#region Using Statements



using System;

using System.Collections.Generic;

using System.Linq;

using System.IO;



using Microsoft.Xna.Framework;

using Microsoft.Xna.Framework.Audio;

using Microsoft.Xna.Framework.Content;

using Microsoft.Xna.Framework.GamerServices;

using Microsoft.Xna.Framework.Graphics;

using Microsoft.Xna.Framework.Input;

using Microsoft.Xna.Framework.Media;



using Sml.Screens;

using SmlEngine.UI.Input;

using SmlEngine.UI.Managers;

using SmlEngine.UI.Screens;



#endregion



namespace Sml

{

    /// <summary>

    /// This is the class that sets up and runs SML.

    /// </summary>

    public class SmlProgram : Game

    {

        #region Fields



        private const string Title = "SML v0.04 - Alpha";



        private GraphicsDeviceManager graphics;

        private SpriteBatch spriteBatch;



        private ScreenManager screenManager;



        private List<Screen> Screens; // used to store screens for now because I can't see how to make a screen inactive in ScreenManager yet



        private TitleScreen titleScreen;

        private MainMenuScreen mainMenuScreen;

        private GameScreen gameScreen;



        private WorldScreen worldScreen;



        private int worldIndex = -1; // used when entering levels to keep track of which world is being used

        private int worldSectionIndex = -1; // which section the world is above

        private List<int> worldExitNumber = new List<int>(); // which exits this level will trigger on clear

        #endregion



        #region Methods



        /// <summary>

        /// Constructs a new SmlProgram instance.

        /// </summary>

        public SmlProgram()

        {

            graphics = new GraphicsDeviceManager(this);

            Content.RootDirectory = "Content";

            Screens = new List<Screen>();

            graphics.DeviceReset += new EventHandler<EventArgs>(graphics_DeviceReset);

        }



        /// <summary>

        /// Loads a level file, world file, or project file.

        /// </summary>

        /// <param name="filePath">The path of the file to open.</param>

        /// <returns>Success state.</returns>

        private bool OpenFile(string filePath)

        {

            // First, determine what type of file this is.

            // Currently, this is inferred via file extension,

            // but this will change once file handling is more solidifed.

            if (File.Exists(filePath))

            {

                string extension = Path.GetExtension(filePath);

                if (extension == ".lvl")

                {

                    TitleScreen t = new TitleScreen();

                    screenManager.SetActiveGroup(screenManager.AddScreenGroup(new ScreenGroup(screenManager, t)));

                    foreach (Sml.Scenes.LevelScene scene in t.Scenes)

                    {

                        scene.Level.LevelCleared += new SmlEngine.Sprites.Collections.LevelClearedEventHandler(Level_LevelCleared);

                    }

                    return true;

                }

                else if (extension == ".wld")

                {

                    WorldScreen w = new WorldScreen(new List<string>() { filePath, Directory.GetCurrentDirectory() + @"\resources\world4.wld" }, new Vector2(Window.ClientBounds.Height, Window.ClientBounds.Width));

                    screenManager.SetActiveGroup(screenManager.AddScreenGroup(new ScreenGroup(screenManager, w)));

                    foreach (Sml.Scenes.WorldScene scene in w.Scenes)

                    {

                        foreach (SmlEngine.Sprites.Collections.World world in scene.Worlds)

                        {

                            world.LevelEntered += new SmlEngine.Sprites.Collections.LevelEnteredEventHandler(world_LevelEntered);

                        }

                    }

                    return true;

                }

                // eventual project file handling code here

                else

                {

                    // We really need an error handling method that does not involve exceptions.

                    // ERROR

                    throw new Exception(string.Format("The file at {0} is not a valid level, project, or world file.", filePath));

                }

            }

            else

            {

                // ERROR

                throw new Exception(string.Format("The file at {0} does not exist.  Please check your paths.", filePath));

            }

        }



        /// <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>

        protected override void Initialize()

        {

            // Add initialization logic here

            Window.Title = Title;

            IsMouseVisible = true;



            //Initialize components

            InputSettings.Defaults();



            screenManager = new ScreenManager(this, "default");



            screenManager.Initialize();



            //Initialize screens

//            titleScreen = new TitleScreen(); //TitleScreen

//            screenManager.AddScreen(titleScreen);



            mainMenuScreen = new MainMenuScreen(); //MainMenuScreen

            gameScreen = new GameScreen(); //GameScreen



//            worldScreen = new WorldScreen(new List<String>(){@"D:\Documents\Files\SML\world4.wld"}, new Vector2(Window.ClientBounds.Height, Window.ClientBounds.Width)); //WorldScreen

            //screenManager.AddScreen(worldScreen);

            if (OpenFile(Directory.GetCurrentDirectory() + @"\resources\world3.wld") == null)

            {

                // null is the current fail condition because exceptions stop a method

                TitleScreen t = new TitleScreen(); // just for now we'll do this

                screenManager.SetActiveGroup(screenManager.AddScreenGroup(new ScreenGroup(screenManager, t)));

                Screens.Add(t);

            }



            base.Initialize();

        }



        /// <summary>

        /// LoadContent will be called once per game and is the place to load

        /// all of your content.

        /// </summary>

        protected override void LoadContent()

        {

            // Create a new SpriteBatch, which can be used to draw textures.

            spriteBatch = new SpriteBatch(GraphicsDevice);



            // Use this.Content to load game content here.

            mainMenuScreen.LoadContent(Content);

            gameScreen.LoadContent(Content);



            foreach (Screen s in screenManager.ScreenGroups[screenManager.activeGroupIndex].Screens)

            {

                //s.LoadContent(Content);

            }

        }



        /// <summary>

        /// UnloadContent will be called once per game and is the place to unload

        /// all content.

        /// </summary>

        protected override void UnloadContent()

        {

            // Unload non-ContentManager content here

        }



        void graphics_DeviceReset(object sender, EventArgs e)

        {

            foreach (Screen s in screenManager.ScreenGroups[screenManager.activeGroupIndex].Screens)

            {

                if (s is WorldScreen)

                {

                    (s as WorldScreen).Scenes[0].ReloadContent();

                }

            }

        }



        void world_LevelEntered(object sender, SmlEngine.Sprites.Base.WorldMap.LevelEnteredEventArgs e)

        {

            if (!File.Exists(e.filePath))

            {

                System.Windows.Forms.MessageBox.Show(string.Format("The following level file could not be found:{0}{1}", Environment.NewLine, e.filePath), "File Not Found", System.Windows.Forms.MessageBoxButtons.OK, System.Windows.Forms.MessageBoxIcon.Error);

                return;

            }

            try

            {

                foreach (Screen s in screenManager.ScreenGroups[screenManager.activeGroupIndex].Screens)

                {

                    if (s is WorldScreen)

                    {

                        foreach (Sml.Scenes.WorldScene scene in s.Scenes)

                        {

                            if (scene.Worlds.Contains(sender))

                            {

                                worldIndex = screenManager.GroupIndexFromScreen(s);

                                worldSectionIndex = scene.Worlds.IndexOf((SmlEngine.Sprites.Collections.World)sender);

                                continue;

                            }

                        }

                    }

                }

                worldExitNumber = e.exitNumber;

                OpenFile(e.filePath);

            }

            catch (Exception ex)

            {

                System.Windows.Forms.MessageBox.Show(ex.Message);

            }

        }



        void Level_LevelCleared(object sender, SmlEngine.Sprites.Collections.LevelClearedEventArgs e)

        {

            if (screenManager.resourceState == SmlEngine.ResourceState.WorldStandalone)

            {

                screenManager.SetActiveGroup(worldIndex);

                (screenManager.ScreenGroups[worldIndex].Screens[0] as WorldScreen).GetScene(0).SwapWorld(worldSectionIndex);

                if (worldExitNumber.Any())

                {

                    (screenManager.ScreenGroups[worldIndex].Screens[0] as WorldScreen).GetScene(0).Worlds[worldSectionIndex].StartReveal(worldExitNumber[0]);

                }

                else

                {

                    (screenManager.ScreenGroups[worldIndex].Screens[0] as WorldScreen).GetScene(0).Worlds[worldSectionIndex].UnlockTile();

                }

            }

            else

            {

                // Default case for no world loaded (i.e. standalone level)

                screenManager.RemoveAllScreenGroups();

                TitleScreen t = new TitleScreen();

                screenManager.SetActiveGroup(screenManager.AddScreenGroup(new ScreenGroup(screenManager, t)));

            }

        }



        /// <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>

        protected override void Update(GameTime gameTime)

        {

            // Allows the game to exit

            if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed)

                this.Exit();



            // Add update logic here

            base.Update(gameTime);

        }



        /// <summary>

        /// This is called when the game should draw itself.

        /// </summary>

        /// <param name="gameTime">Provides a snapshot of timing values.</param>

        protected override void Draw(GameTime gameTime)

        {

            GraphicsDevice.Clear(Color.Black);



            // Add drawing code here



             base.Draw(gameTime);

            //worldScreen.Draw(gameTime);

        }

        #endregion

    }



    #region Entry Point



#if WINDOWS || XBOX

    static class Program

    {

        /// <summary>

        /// The main entry point for the application.

        /// </summary>

        static void Main(string[] args)

        {

            using (SmlProgram game = new SmlProgram())

            {

                game.Run();

            }

        }

    }

#endif



    #endregion

}