using System;
using System.Collections.Generic;

#if ANDROID
using Android.App;
#endif

using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using Microsoft.Xna.Framework.Input.Touch;
using Microsoft.Xna.Framework.Media;
using Microsoft.Xna.Framework.Storage;

namespace MonoGame.Samples.Input
{
	public class Game1 : Microsoft.Xna.Framework.Game
	{
		GraphicsDeviceManager graphics;
		SpriteBatch spriteBatch;		
		
		SpriteFont font;
		Color clearColor = Color.CornflowerBlue;
		
		KeyboardState currentKeyboardState;
		GamePadState currentGamePadState;
		TouchCollection currentTouchState;
		
		public Game1 ()
		{
			graphics = new GraphicsDeviceManager (this);
			
			Content.RootDirectory = "Content";
			
			graphics.PreferMultiSampling = true;
			graphics.IsFullScreen = true;	

			graphics.SupportedOrientations = DisplayOrientation.LandscapeLeft | DisplayOrientation.LandscapeRight 
				| DisplayOrientation.Portrait
				;
		}
		
		/// <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 ()
		{
			// TODO: Add your initialization logic here
			TouchPanel.EnabledGestures = GestureType.Tap | GestureType.DoubleTap;
			
			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);

			// TODO: use this.Content to load your game content here
			font = Content.Load<SpriteFont> ("spriteFont1");
						
		}

		/// <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)
		{			
			if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed)
			{
				Exit();
			}
			
			currentKeyboardState = Keyboard.GetState ();
			currentGamePadState = GamePad.GetState (PlayerIndex.One);
			currentTouchState = TouchPanel.GetState();
			while (TouchPanel.IsGestureAvailable)
			{
				var gesture = TouchPanel.ReadGesture();
				switch (gesture.GestureType) {
					case GestureType.DoubleTap:
					        clearColor = clearColor == Color.CornflowerBlue ? Color.Red : Color.CornflowerBlue;
							break;
					case GestureType.Tap:
					        clearColor = clearColor == Color.CornflowerBlue ? Color.Black : Color.CornflowerBlue;
							break;
				}
			}
			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)
		{
			graphics.GraphicsDevice.Clear (clearColor);
			
			// Won't be visible until we hide the movie
			spriteBatch.Begin();	
			
			Vector2 center = new Vector2(GraphicsDevice.Viewport.Width /2, GraphicsDevice.Viewport.Height /2);
			Vector2 s1 = font.MeasureString("Touch the Screen");
			center.X -= (s1.X /2);
			spriteBatch.DrawString(font, "Touch the Screen", center, Color.Red);
			center.Y += 20;
			spriteBatch.DrawString(font, GraphicsDevice.Viewport.Width.ToString() + " x " + GraphicsDevice.Viewport.Height.ToString(), center, Color.Red);
			center.Y += 20;
			spriteBatch.DrawString(font, GraphicsDevice.PresentationParameters.DisplayOrientation.ToString(), center, Color.Red);
			
			
			spriteBatch.DrawString(font, "0,0", new Vector2(0,0), Color.Red);
			string s = GraphicsDevice.Viewport.Width.ToString() + ",0";
			Vector2 v = font.MeasureString(s);			
			spriteBatch.DrawString(font, s, new Vector2(GraphicsDevice.Viewport.Width-v.X, 0), Color.Red);
			s = "0,"+GraphicsDevice.Viewport.Height.ToString();
			v = font.MeasureString(s);			
			spriteBatch.DrawString(font, s , new Vector2(0, GraphicsDevice.Viewport.Height-v.Y), Color.Red);
		    string wandh = GraphicsDevice.Viewport.Width.ToString() + ", " + GraphicsDevice.Viewport.Height.ToString();
			Vector2 wh = font.MeasureString(wandh);
			spriteBatch.DrawString(font, wandh, new Vector2(GraphicsDevice.Viewport.Width-wh.X, GraphicsDevice.Viewport.Height-wh.Y), Color.Red);
			
								
			if (currentTouchState != null && currentTouchState.Count > 0) 
			{
				for (int i = 0 ; i < currentTouchState.Count; i++)
				{
					center.Y += s1.Y;
					Vector2 p = currentTouchState[i].Position;
					spriteBatch.DrawString(font, "+", p, Color.Red);
					spriteBatch.DrawString(font, p.ToString(), center, Color.Red);
				}
			}
			
			spriteBatch.End();
		}
	}
}