using Encompass;
using PongFE.Components;
using PongFE.Enums;
using PongFE.Messages;
using SpriteFontPlus;

namespace PongFE.Engines
{
    [Reads(typeof(PlayAreaComponent))]
    [Receives(typeof(GameWinMessage))]
    [Sends(typeof(UITextSpawnMessage), typeof(ChangeGameStateMessage))]
    public class GameWinEngine : Engine
    {
        public DynamicSpriteFont Font { get; }
        private readonly string _playerOneWinText = "Player 1 Wins!";
        private readonly string _playerTwoWinText = "Player 2 Wins!";

        public GameWinEngine(DynamicSpriteFont font)
        {
            Font = font;
        }

        public override void Update(double dt)
        {
            if (SomeMessage<GameWinMessage>())
            {
                ref readonly var gameWinMessage = ref ReadMessage<GameWinMessage>();
                ref readonly var playAreaComponent = ref ReadComponent<PlayAreaComponent>();

                string winText;
                if (gameWinMessage.PlayerIndex == PlayerIndex.One)
                {
                    winText = _playerOneWinText;
                }
                else
                {
                    winText = _playerTwoWinText;
                }

                var textDimensions = Font.MeasureString(winText);

                SendMessage(new UITextSpawnMessage(
                    new MoonTools.Structs.Position2D(
                        (playAreaComponent.Width - textDimensions.X) / 2,
                        playAreaComponent.Height / 4
                    ),
                    Font,
                    winText
                ));

                SendMessage(new ChangeGameStateMessage(GameState.Title), 2);
            }
        }
    }
}