using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using System; // ez

namespace SpaceShooter
{
    /// <summary>
    /// This is the main type for your game.
    /// </summary>
    public class Game1 : Game
    {
        GraphicsDeviceManager graphics;
        SpriteBatch SpriteBatch;
        Texture2D Ship;
        Vector2 ShipPos;
        Vector2 ShipPosAi;
        bool ShipColor = false;
        Random rng = new Random();
        public Game1()
        {
            graphics = new GraphicsDeviceManager(this);
            Content.RootDirectory = "Content";
        }

        /// <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

            ShipPos = new Vector2(Window.ClientBounds.Width / 2, Window.ClientBounds.Height / 2);
            ShipPosAi = new Vector2(Window.ClientBounds.Width, Window.ClientBounds.Height);
            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);
            Ship = Content.Load<Texture2D>("images/ship");

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

        /// <summary>
        /// UnloadContent will be called once per game and is the place to unload
        /// game-specific 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)
        {
            // Spelare
            KeyboardState KeyboardState = Keyboard.GetState();
            if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed || Keyboard.GetState().IsKeyDown(Keys.Escape))
                Exit();

            if (KeyboardState.IsKeyDown(Keys.W) && !(ShipPos.Y <= 0))
            {
                ShipPos.Y -= 3f;
            }
            if (KeyboardState.IsKeyDown(Keys.S) && !(ShipPos.Y >= Window.ClientBounds.Height - (int)Ship.Height))
            {
                ShipPos.Y += 3f;
            }
            if (KeyboardState.IsKeyDown(Keys.A) && !(ShipPos.X <= 0))
            {
                ShipPos.X -= 3f;
            }
            if (KeyboardState.IsKeyDown(Keys.D) && !(ShipPos.X >= Window.ClientBounds.Width - (int)Ship.Width))
            {
                ShipPos.X += 3f;
            }

            if (KeyboardState.IsKeyDown(Keys.E))
            {
                if (ShipColor == false)
                {
                    ShipColor = true;
                }
                else if (ShipColor == true)
                {
                    ShipColor = false;
                }
                // AI
                int dir = rng.Next(1,5);
                if (dir == 1)
                {
                    ShipPosAi.Y -= 2f;
                }
                if (dir == 2)
                {
                    ShipPosAi.Y += 2f;
                }
                if (dir == 3)
                {
                    ShipPosAi.X -= 2f;
                }
                if (dir == 4)
                {
                    ShipPosAi.Y += 2f;
                }
            }
            // 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.HotPink);
            SpriteBatch.Begin();
            SpriteBatch.Draw(Ship, ShipPosAi, Color.White);
            if (ShipColor == false)
            {
                SpriteBatch.Draw(Ship, ShipPos, Color.Green);
            }
            else
            {
                SpriteBatch.Draw(Ship, ShipPos, Color.Red);
            }


            SpriteBatch.End();
            // TODO: Add your drawing code here

            base.Draw(gameTime);
        }
    }
}