using Microsoft.Xna.Framework;
using Microsoft.Xna.Framework.Graphics;
using Microsoft.Xna.Framework.Input;
using System;
using System.Linq;
using Tutorial015.Controls;
using Tutorial015.Managers;

namespace Tutorial015
{
  /// <summary>
  /// This is the main type for your game.
  /// </summary>
  public class Game1 : Game
  {
    GraphicsDeviceManager graphics;
    SpriteBatch spriteBatch;

    private Button _button;

    private SpriteFont _font;

    private int _score;

    private ScoreManager _scoreManager;

    private float _timer;

    public static Random 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()
    {
      Random = new Random();

      IsMouseVisible = true;

      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);

      _scoreManager = ScoreManager.Load();

      _font = Content.Load<SpriteFont>("Font");

      _button = new Button(Content.Load<Texture2D>("Button"), _font)
      {
        Text = "Click me!",
      };

      _button.Click += Button_Click;

      SetButtonPosition(_button);

      _timer = 5; // 5 seconds a round
    }

    private void Button_Click(object sender, EventArgs e)
    {
      SetButtonPosition((Button)sender);

      _score++;
    }

    private void SetButtonPosition(Button button)
    {
      var x = Random.Next(0, graphics.PreferredBackBufferWidth - button.Rectangle.Width);
      var y = Random.Next(0, graphics.PreferredBackBufferHeight - button.Rectangle.Height);

      button.Position = new Vector2(x, y);
    }

    /// <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)
    {
      _timer -= (float)gameTime.ElapsedGameTime.TotalSeconds;

      // If the round is over
      if (_timer <= 0)
      {
        SetButtonPosition(_button);

        _scoreManager.Add(new Models.Score()
          {
            PlayerName = "Bob",
            Value = _score, 
          }
        );

        ScoreManager.Save(_scoreManager);

        _timer = 5;
        _score = 0;
      }

      _button.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);

      spriteBatch.Begin();

      _button.Draw(gameTime, spriteBatch);

      spriteBatch.DrawString(_font, "Score: " + _score, new Vector2(10, 10), Color.Red);
      spriteBatch.DrawString(_font, "Time: " + _timer.ToString("N2"), new Vector2(10, 30), Color.Red);

      spriteBatch.DrawString(_font, "Highscores:\n" + string.Join("\n", _scoreManager.Highscores.Select(c => c.PlayerName + ": "+ c.Value).ToArray()), new Vector2(680, 10), Color.Red);

      spriteBatch.End();

      base.Draw(gameTime);
    }
  }
}