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 Pool
{
    /// <summary>
    /// Arcade Pool
    /// Graphics by Matt Pickering
    /// </summary>
    public class Game1 : Microsoft.Xna.Framework.Game
    {
        GraphicsDeviceManager graphics;
        SpriteBatch spriteBatch;
        Texture2D backgroundImage;
        Texture2D whiteBall;
        Vector2 whiteSpeed;
        Vector2 whitePosition;
        Rectangle rectangle;
        int backgroundNumber;
        bool backgroundChanged;

        public Game1()
        {
            graphics = new GraphicsDeviceManager(this);
            Content.RootDirectory = "Content";

            graphics.PreferredBackBufferHeight = 594;
            graphics.PreferredBackBufferWidth = 1030;
        }

        /// <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

            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);

            backgroundImage = Content.Load<Texture2D>(@"Tables/table_blue");
            backgroundNumber = 0;
            backgroundChanged = false;
            whiteBall = Content.Load<Texture2D>(@"Balls/white1");
            whitePosition = new Vector2(200, 280);
            whiteSpeed = Vector2.Zero;

            rectangle = new Rectangle(-35, -24, graphics.GraphicsDevice.Viewport.Width + 70, graphics.GraphicsDevice.Viewport.Height + 48);
        }

        /// <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();

            if (GamePad.GetState(PlayerIndex.One).Buttons.RightShoulder == ButtonState.Released && backgroundChanged)
                backgroundChanged = false;

            if (GamePad.GetState(PlayerIndex.One).Buttons.RightShoulder == ButtonState.Pressed && !backgroundChanged)
            {
                TableColour();
                backgroundChanged = true;
            }

            // Allow player to control the white ball
            if (whiteSpeed == Vector2.Zero)
            {
                GamePadState padState = GamePad.GetState(PlayerIndex.One);

                if (GamePad.GetState(PlayerIndex.One).Buttons.A == ButtonState.Pressed)
                {
                    whiteSpeed.X = 8 * padState.ThumbSticks.Left.X;
                    whiteSpeed.Y = 8 * -padState.ThumbSticks.Left.Y;
                }
            }

            // Move the ball and friction
            whitePosition += whiteSpeed;
            if (whiteSpeed != Vector2.Zero)
                whiteSpeed *= new Vector2(0.99f, 0.99f);

            // Stop the ball
            if (Math.Abs(whiteSpeed.X) < 0.26f && Math.Abs(whiteSpeed.Y) < 0.26f)
                whiteSpeed = Vector2.Zero;

            // Check bouncing against cushion.
            if (whitePosition.X < 72 || whitePosition.X > Window.ClientBounds.Width - (whiteBall.Width + 72))
                whiteSpeed.X *= -1;

            if (whitePosition.Y < 76 || whitePosition.Y > Window.ClientBounds.Height - (whiteBall.Height + 76))
                whiteSpeed.Y *= -1;

            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);

            spriteBatch.Draw(backgroundImage, rectangle, Color.White);
            spriteBatch.Draw(whiteBall, whitePosition, Color.White);

            spriteBatch.End();

            base.Draw(gameTime);
        }

        public void TableColour()
        {
            switch (backgroundNumber)
            {
                case 0:
                    backgroundImage = Content.Load<Texture2D>(@"Tables/table_green");
                    backgroundNumber = 1;
                    break;
                case 1:
                    backgroundImage = Content.Load<Texture2D>(@"Tables/table_purple");
                    backgroundNumber = 2;
                    break;
                case 2:
                    backgroundImage = Content.Load<Texture2D>(@"Tables/table_red");
                    backgroundNumber = 3;
                    break;
                case 3:
                    backgroundImage = Content.Load<Texture2D>(@"Tables/table_yellow");
                    backgroundNumber = 4;
                    break;
                case 4: backgroundImage = Content.Load<Texture2D>(@"Tables/table_blue");
                    backgroundNumber = 0;
                    break;
            }
        }
    }
}