using Encompass;
using PongFE.Components;
using PongFE.Messages;

namespace PongFE.Engines
{
    [Reads(
        typeof(ScoreComponent),
        typeof(PlayerComponent),
        typeof(BallParametersComponent)
    )]
    [Receives(typeof(ScoreMessage))]
    [Sends(typeof(GameWinMessage), typeof(BallSpawnMessage))]
    [Writes(typeof(ScoreComponent))]
    public class ScoreEngine : Engine
    {
        public override void Update(double dt)
        {
            foreach (ref readonly var scoreMessage in ReadMessages<ScoreMessage>())
            {
                if (HasComponent<ScoreComponent>(scoreMessage.Entity))
                {
                    ref readonly var scoreComponent = ref GetComponent<ScoreComponent>(scoreMessage.Entity);
                    SetComponent(scoreMessage.Entity, new ScoreComponent(scoreComponent.Score + 1));

                    if (scoreComponent.Score + 1 >= 2)
                    {
                        ref readonly var playerComponent = ref GetComponent<PlayerComponent>(scoreMessage.Entity);
                        SendMessage(new GameWinMessage(playerComponent.PlayerIndex));
                    }
                    else
                    {
                        ref readonly var ballParametersComponent = ref ReadComponent<BallParametersComponent>();

                        SendMessage(
                            new BallSpawnMessage(
                                new MoonTools.Structs.Position2D(640, (int)MathHelper.RandomFloat(20, 700)),
                                ballParametersComponent.Speed,
                                16,
                                16
                            ),
                            ballParametersComponent.Delay
                        );
                    }
                }
            }
        }
    }
}