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 WindowsGame6
{
    /// <summary>
    /// This is the main type for your game
    /// </summary>
    public class Game1 : Microsoft.Xna.Framework.Game
    {
        GraphicsDeviceManager graphics;
        SpriteBatch spriteBatch;
        Texture2D texture;
        Point frameSize = new Point(32, 32);
        Point currentFrame = new Point(0, 0);
        Point sheetSize = new Point(3,4 );
        int timeSinceLastFrame = 0;
        int millisecondsPerFrame = 60;
        Vector2 pos1 = Vector2.Zero;
        float speed1 = 3f;


        

      
        

        public Game1()
        {
            graphics = new GraphicsDeviceManager(this);
            Content.RootDirectory = "Content";
            TargetElapsedTime = new TimeSpan(0, 0, 0, 0, 60);
            
            
            
        }

        

        
        /// <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
            GraphicsDevice device;
            graphics.PreferredBackBufferWidth = 500;
            graphics.PreferredBackBufferHeight = 192;
            graphics.IsFullScreen = false;
            graphics.ApplyChanges();
            Window.Title = "Animate Character Sprite";

            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);
            texture = Content.Load<Texture2D>("man");
          
            

            // TODO: use this.Content to load your game content here
        }

        /// <summary>
        /// UnloadContent will be called once per game and is the place to unload
        /// all content.
        /// </summary>
        protected override void UnloadContent()
        {
            // TODO: Unload any non ContentManager content here
        }

        /// <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();

            KeyboardState keyboardState = Keyboard.GetState();
            if (keyboardState.IsKeyDown(Keys.Up))
            {
                pos1.Y -= speed1;
                currentFrame.Y = 0;
                timeSinceLastFrame += gameTime.ElapsedGameTime.Milliseconds;
                if (timeSinceLastFrame > millisecondsPerFrame)
                {
                    timeSinceLastFrame -= millisecondsPerFrame;
                    if (currentFrame.Y >= sheetSize.Y)
                        currentFrame.Y = 0;
                    {
                        ++currentFrame.X;
                        if (currentFrame.X >= sheetSize.X)
                        {
                            currentFrame.X = 0;

                        }
                    }
                }

            }
            else  if (keyboardState.IsKeyDown(Keys.Down))
            {
                pos1.Y += speed1;
                currentFrame.Y = +2;
                timeSinceLastFrame += gameTime.ElapsedGameTime.Milliseconds;
                if (timeSinceLastFrame > millisecondsPerFrame)
                {
                    timeSinceLastFrame -= millisecondsPerFrame;
                    if (currentFrame.Y >= sheetSize.Y)
                        currentFrame.Y = 0;
                    {
                        ++currentFrame.X;
                        if (currentFrame.X >= sheetSize.X)
                        {
                            currentFrame.X = 0;

                        }
                    }
                }

            }
            else if (keyboardState.IsKeyDown(Keys.Right))
            {
                pos1.X += speed1;
                currentFrame.Y = +1;
                timeSinceLastFrame += gameTime.ElapsedGameTime.Milliseconds;
                if (timeSinceLastFrame > millisecondsPerFrame)
                {
                    timeSinceLastFrame -= millisecondsPerFrame;
                    if (currentFrame.Y >= sheetSize.Y)
                        currentFrame.Y = 0;
                    {
                        ++currentFrame.X;
                        if (currentFrame.X >= sheetSize.X)
                        {
                            currentFrame.X = 0;

                        }
                    }
                }
            }
            else if (keyboardState.IsKeyDown(Keys.Left))
            {
                pos1.X -= speed1;
                currentFrame.Y = +3;
                timeSinceLastFrame += gameTime.ElapsedGameTime.Milliseconds;
                if (timeSinceLastFrame > millisecondsPerFrame)
                {
                    timeSinceLastFrame -= millisecondsPerFrame;
                    if (currentFrame.Y >= sheetSize.Y)
                        currentFrame.Y = 0;
                    {
                        ++currentFrame.X;
                        if (currentFrame.X >= sheetSize.X)
                        {
                            currentFrame.X = 0;

                        }
                    }
                }
            }

            if (pos1.X < 0)
                pos1.X = 0;
            if (pos1.Y < 0)
                pos1.Y = 0;
            if (pos1.X > Window.ClientBounds.Width - frameSize.X)
                pos1.X = Window.ClientBounds.Width - frameSize.X;
            if (pos1.Y > Window.ClientBounds.Height - frameSize.Y)
                pos1.Y = Window.ClientBounds.Height - frameSize.Y;

            
            // TODO: Add your 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.CornflowerBlue);

            spriteBatch.Begin(SpriteBlendMode.AlphaBlend,
                SpriteSortMode.FrontToBack, SaveStateMode.None);
            spriteBatch.Draw(texture, pos1,
                new Rectangle(currentFrame.X * frameSize.X,
                    currentFrame.Y * frameSize.Y,
                    frameSize.X,
                    frameSize.Y),
                    Color.White
                    , 0, Vector2.Zero, 1, SpriteEffects.None, 0);
          
                
                
            spriteBatch.End();
            

            base.Draw(gameTime);
        }
        
    }
    
}