#region Using Statements
using System;
using System.Collections.Generic;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Audio;
using Microsoft.Xna.Framework.Content;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using Microsoft.Xna.Framework.Storage;
#endregion

namespace Spaceattack
{
    /// <summary>
    /// This is the main type for your game
    /// </summary>
    public class Game1 : Microsoft.Xna.Framework.Game
    {
        GraphicsDeviceManager graphics;
        ContentManager content;
        KeyboardState oldState;
        List<Vector2> bullets = new List<Vector2>();

        public Game1()
        {
            graphics = new GraphicsDeviceManager(this);
            content = new ContentManager(Services);
            oldState = Keyboard.GetState();
        }


        /// <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();
        }


        Texture2D myShip; // you ship Player - 1
        Texture2D Missle; // Player - 1 Missle
        Texture2D Bullet; // Player - 1 Bullet
                // ENEMIES
        Texture2D Enemy1; // enemy1
                //POSITIONS
        Vector2 ShipPosition = Vector2.Zero;
        Vector2 BulletPosition = Vector2.Zero;
        Vector2 MisslePosition = Vector2.Zero;
        Vector2 Enemy1Position = Vector2.Zero;
        SpriteBatch spriteBatch;
        protected override void LoadGraphicsContent(bool loadAllContent)
        {
            if (loadAllContent)
            {
                myShip = content.Load<Texture2D>("Ship");
                Missle = content.Load<Texture2D>("Missle");
                Bullet = content.Load<Texture2D>("Bullet");
                Enemy1 = content.Load<Texture2D>("Enemy1");
                spriteBatch = new SpriteBatch(graphics.GraphicsDevice);
            }
        }



        /// <summary>
        /// Unload your graphics content.  If unloadAllContent is true, you should
        /// unload content from both ResourceManagementMode pools.  Otherwise, just
        /// unload ResourceManagementMode.Manual content.  Manual content will get
        /// Disposed by the GraphicsDevice during a Reset.
        /// </summary>
        /// <param name="unloadAllContent">Which type of content to unload.</param>
        protected override void UnloadGraphicsContent(bool unloadAllContent)
        {
            if (unloadAllContent == true)
            {
                content.Unload();
            }
        }


        /// <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 default game to exit on Xbox 360 and Windows
            if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed)
                this.Exit();

            // TODO: Add your update logic here

            base.Update(gameTime);
            UpdateBullets();
            UpdateKeyboard(BulletPosition);
        }
        void UpdateBullets()
        {

        }
        void UpdateKeyboard(Vector2 BulletPosition)
        {
            KeyboardState newState = Keyboard.GetState();

            // Check to see if the Spacebar is down
            if (newState.IsKeyDown(Keys.Space))
            {
                bullets.Add(new Vector2(+120, +25) + ShipPosition);
            }
            if (newState.IsKeyDown(Keys.Down))
            {
                ShipPosition.Y++;
            }
            if (newState.IsKeyDown(Keys.Up))
            {
                ShipPosition.Y--;
            }
            if (newState.IsKeyDown(Keys.Left))
            {
                ShipPosition.X--;
            }
            if (newState.IsKeyDown(Keys.Right))
            {
                ShipPosition.X++;
            }
            oldState = newState;
        }

        /// <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(Color.CornflowerBlue);

            //draw our sprite

            spriteBatch.Begin(SpriteBlendMode.AlphaBlend);
            spriteBatch.Draw(myShip, ShipPosition, Color.White);
            for (int i = 0; i < bullets.Count; i++)
            {
                spriteBatch.Draw(Bullet, bullets[i], Color.White);
            }
            spriteBatch.End();
            base.Draw(gameTime);
        }

    }
}

for (int i = 0; i < bullets.Count; i++)
{
	// You'll want some time factor included 
	bullets[i].x += 5.0f * gameTime.EllapsedTime.TotalSeconds;
}

    class Bullet
    {
        public Rectangle rectangle;
        public Vector2 position;
        public float speed;
        public bool isActive;
        public float Rotation;
        public BoundingSphere sphere;
       
        double time;
        

        public Bullet(Vector2 Position, GameTime gameTime, float rotation,float length) 
        {
            rectangle = new Rectangle((int)Position.X, (int)Position.Y, 4, 4);
            Rotation = rotation;
            isActive = true;
            speed = 10+length;
            position = Position;
            time = gameTime.TotalGameTime.TotalSeconds+.5;
            sphere = new BoundingSphere(new Vector3(position.X,position.Y,0),2);
            
        }
        public void MoveBullet(GameTime gameTime)
        {
            if (time >= gameTime.TotalGameTime.TotalSeconds)
            {
                if (isActive == true)
                {
                    position.X += speed * ((float)Math.Cos(Rotation));
                    position.Y += speed * ((float)Math.Sin(Rotation));
                    rectangle.X = (int)position.X;
                    rectangle.Y = (int)position.Y;
                    sphere.Center.X = position.X;
                    sphere.Center.Y = position.Y;
                }
            }
            else
            {
                isActive = false;
            }
        }
    }
//The below code is from the main game

        void AddBullet(GameTime gameTime,Vector2 position, float rotation)
        {
            if (gameTime.TotalGameTime.Milliseconds % 200 < 50&&shipobject.isactive)
            {
                if (beendone == false)
                {
                    ScreenManager.audio.Fire();
                    bulletsInPlay.Add(bullets[bulletcount] = new Bullet(position, gameTime, rotation,length));
                    bulletcount++;
                    beendone = true;
                }
            }
            else
            {
                beendone = false;
            }
           
            firebullet = false;
        }