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

using MonoGame.Extended;
using MonoGame.Extended.Entities;
using MonoGame.Extended.Tiled;
using MonoGame.Extended.Tiled.Renderers;

namespace EscapeRoom
{
    /// <summary>
    /// This is the main type for your game.
    /// </summary>
    public class Game1 : Game
    {
        Player player = new Player();

        OrthographicCamera camera;

        // The tile map
        private TiledMap map;
        // The renderer for the map
        private TiledMapRenderer mapRenderer;

        GraphicsDeviceManager graphics;
        SpriteBatch spriteBatch;

        public Game1()
        {
            graphics = new GraphicsDeviceManager(this)
            {
                PreferredBackBufferWidth = 1920,
                PreferredBackBufferHeight = 1080,
                IsFullScreen = false
            };
            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
            player.Speed = 200f;

            camera = new OrthographicCamera(GraphicsDevice);


            // Load the compiled map
            map = Content.Load<TiledMap>("map");
            // Create the map renderer
            mapRenderer = new TiledMapRenderer(GraphicsDevice);

            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);

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

            player.Texture = Content.Load<Texture2D>("Player");
        }

        /// <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)
        {
            if (GamePad.GetState(PlayerIndex.One).Buttons.Back == ButtonState.Pressed || Keyboard.GetState().IsKeyDown(Keys.Escape))
                Exit();

            // TODO: Add your update logic here
            var kstate = Keyboard.GetState();

            if (kstate.IsKeyDown(Keys.Up))
            {
                player.Position.Y -= player.Speed * (float)gameTime.ElapsedGameTime.TotalSeconds;
                camera.Move(new Vector2(player.Speed, 0));
            }

            if (kstate.IsKeyDown(Keys.Down))
            {
                player.Position.Y += player.Speed * (float)gameTime.ElapsedGameTime.TotalSeconds;
                camera.Move(new Vector2(-player.Speed, 0));
            }

            if (kstate.IsKeyDown(Keys.Left))
            {
                player.Position.X -= player.Speed * (float)gameTime.ElapsedGameTime.TotalSeconds;
                camera.Move(new Vector2(0, -player.Speed));
            }

            if (kstate.IsKeyDown(Keys.Right))
            {
                player.Position.X += player.Speed * (float)gameTime.ElapsedGameTime.TotalSeconds;
                camera.Move(new Vector2(0, -player.Speed));
            }

            player.Position.X = Math.Min(Math.Max(player.Texture.Width / 2, player.Position.X), graphics.PreferredBackBufferWidth - player.Texture.Width / 2);
            player.Position.Y = Math.Min(Math.Max(player.Texture.Height / 2, player.Position.Y), graphics.PreferredBackBufferHeight - player.Texture.Height / 2);

            // Update the map
            // map Should be the `TiledMap`
            mapRenderer.Update(gameTime);

            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);

            // TODO: Add your drawing code here

            var transformMatrix = camera.GetViewMatrix();
            spriteBatch.Begin(transformMatrix: transformMatrix);

            spriteBatch.Draw(
            player.Texture,
            player.Position,
            null,
            Color.White,
            0f,
            new Vector2(player.Texture.Width / 2, player.Texture.Height / 2),
            Vector2.One,
            SpriteEffects.None,
            0f
            );


            spriteBatch.End();

            base.Draw(gameTime);
        }
    }

    class Player
    {
        public Texture2D Texture;
        public Vector2 Position;
        public float Speed;
    }
}