using System;
using System.Collections.Generic;
using System.Linq;
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 Microsoft.Xna.Framework.Net;
using Microsoft.Xna.Framework.Storage;

namespace WindowsGame1
{
    public class Game1 : Microsoft.Xna.Framework.Game
    {
        GraphicsDeviceManager graphics;
        KeyboardState oldState;
        Color backColor = Color.CornflowerBlue;
        Color upColor = Color.CornflowerBlue;
        Color frontColor = Color.Red;
        SpriteBatch spriteBatch;




        public Game1()
        {
            graphics = new GraphicsDeviceManager(this);
        }

        protected override void Initialize()
        {
            base.Initialize();
            oldState = Keyboard.GetState();
        }

        private Texture2D SpriteTexture;
        private Rectangle TitleSafe;
        protected override void LoadContent()
        {
            spriteBatch = new SpriteBatch(GraphicsDevice);
            SpriteTexture = Content.Load<Texture2D>("ship");
            TitleSafe = GetTitleSafeArea(.8f);
        }

        protected override void UnloadContent()
        {
        }

        protected override void Update(GameTime gameTime)
        {
            // Allows the game to exit
            if (GamePad.GetState(PlayerIndex.One).Buttons.Back ==
                ButtonState.Pressed)
                this.Exit();

            UpdateInput();

            base.Update(gameTime);
        }

        protected Rectangle GetTitleSafeArea(float percent)
        {
            Rectangle retval = new Rectangle(
                graphics.GraphicsDevice.Viewport.X,
                graphics.GraphicsDevice.Viewport.Y,
                graphics.GraphicsDevice.Viewport.Width,
                graphics.GraphicsDevice.Viewport.Height);
#if XBOX
            // Find Title Safe area of Xbox 360.
            float border = (1 - percent) / 2;
            retval.X = (int)(border * retval.Width);
            retval.Y = (int)(border * retval.Height);
            retval.Width = (int)(percent * retval.Width);
            retval.Height = (int)(percent * retval.Height);
            return retval;
#else
            return retval;
#endif
        }

        private void UpdateInput()
        {
            KeyboardState newState = Keyboard.GetState();

            // Is the SPACE key down?
            if (newState.IsKeyDown(Keys.Space))
            {
                // If not down last update, key has just been pressed.
                if (!oldState.IsKeyDown(Keys.Space))
                {
                    backColor =
                        frontColor;
                }
            }
            else if (oldState.IsKeyDown(Keys.Space))
            {
                // Key was down last update, but not down now, so
                // it has just been released.
            }
            else
            {
                //backColor = upColor;
            }
            //backColor = upColor;
            // Update saved state.
            oldState = newState;
        }

        protected override void Draw(GameTime gameTime)
        {
            graphics.GraphicsDevice.Clear(Color.CornflowerBlue);
            spriteBatch.Begin();
            Vector2 pos = new Vector2(TitleSafe.Left, TitleSafe.Top);
            spriteBatch.Draw(SpriteTexture, pos, Color.White);
            spriteBatch.End();
            base.Draw(gameTime);
        }
    }
}