using System;
using System.Collections.Generic;
using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;

namespace Barbs
{
    class Program : Game, IDisposable
    {
        Texture2D ballTexture;
        private GraphicsDeviceManager graphics;
        private SpriteBatch spriteBatch;
        BasicEffect basicEffect;
        Matrix world;
        Matrix view;
        Matrix projection;
        Line testLine;
        Effect lineEffect;
        public Program()
        {
            graphics = new GraphicsDeviceManager(this);
            Content.RootDirectory = ".";
        }

        protected override void Initialize()
        {
            graphics.PreferredBackBufferHeight = GraphicsAdapter.DefaultAdapter.CurrentDisplayMode.Height;
            graphics.PreferredBackBufferWidth = GraphicsAdapter.DefaultAdapter.CurrentDisplayMode.Width;
            graphics.ApplyChanges();
            Window.IsBorderless = true;
            
            base.Initialize();
        }

        protected override void LoadContent()
        {
            // Create a new SpriteBatch, which can be used to draw textures.
            spriteBatch = new SpriteBatch(GraphicsDevice);
            ballTexture = Content.Load<Texture2D>("ball");

            world = Matrix.CreateTranslation(0, 0, 0);
            view = Matrix.CreateLookAt(new Vector3(0.3f, 0, 2.0f), new Vector3(0, 0, 0), new Vector3(0, 1, 0));
            projection = Matrix.CreatePerspectiveFieldOfView(MathHelper.ToRadians(45), 800f / 480f, 0.01f, 100f);
 
            basicEffect = new BasicEffect(GraphicsDevice);
            lineEffect = Content.Load<Effect>("line");

            Vector2[] arr = { new Vector2(0.0f,0.0f), new Vector2(0.2f,0.5f), new Vector2(0.2f,0.0f), new Vector2(0.5f,0.0f),
            new Vector2(0.7f,-0.5f), new Vector2(1.0f, 1.0f)};
            this.testLine = new Line(new List<Vector2>(arr), 0.01f, Color.DarkSlateGray);
            this.testLine.InitOnGraphicalDevice(GraphicsDevice);
        }

        protected void Dispose()
        {
            //Cleanup
            // OR Final call before shutdown
        }

        protected override void Update(GameTime gameTime)
        {
            if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed || Keyboard.GetState().IsKeyDown(Keys.Escape))
                Exit();

            // TODO: Add your update logic here
            base.Update(gameTime);
        }

        protected override void Draw(GameTime gameTime)
        {
            //graphics.GraphicsDevice.Clear(Color.CornflowerBlue);
            GraphicsDevice.Clear(Color.White);

            // TODO: Add your drawing code here
            // spriteBatch.Begin();
            // spriteBatch.Draw(ballTexture, new Vector2(0, 0), Color.White);
            // spriteBatch.End();

            basicEffect.World = world;
            basicEffect.View = view;
            basicEffect.Projection = projection;
            basicEffect.VertexColorEnabled = true;
            lineEffect.Parameters["WorldViewProjection"].SetValue(world*view*projection);

            this.testLine.Draw(this.lineEffect);
            base.Draw(gameTime);
        }

        static void Main(string[] args)
        {

            using (Program game = new Program())
            {
                game.Run();
            }
        }
    }
}