using GameCore.ECS;
using GameCore.ECS.Interfaces;
using GameCore.Input;

namespace GameCore.Movement;

public class RotationSystem : ISystem
{
    private const float MinPitch = -(float)System.Math.PI / 2f;
    private const float MaxPitch = (float)System.Math.PI / 2f;

    public void Update(World world, float deltaTime)
    {
        var entities = world.GetEntitiesWith<InputStateComponent>();
        foreach (var entity in entities)
        {
            var input = world.GetComponent<InputStateComponent>(entity);
            var rotation = world.GetComponent<RotationComponent>(entity);

            if (input == null || rotation == null)
                continue;

            rotation.Rotation.Y += input.LookDirection.Y;
            rotation.Rotation.X += input.LookDirection.X;

            rotation.Rotation.X = System.Math.Clamp(rotation.Rotation.X, MinPitch, MaxPitch);
        }
    }
}