using System.Runtime.InteropServices.Swift;
using ExampleWorld.wit.imports.lyra.api;

namespace LyraApi.Ecs;

public class ViewResult
{
    private List<Component> components;
    private IEcs.EcsDynamicView inner;

    internal ViewResult(List<Component> components, IEcs.EcsDynamicView inner)
    {
        this.components = components;
        this.inner = inner;
    }

    public IEnumerable<(Entity, T1)> Get<T1>() where T1 : IComponent
    {
        (IEcs.Entity, byte[])? row = inner.Next();

        if (row is (var entity, byte[] bytes))
        {
            byte[] compBytes = bytes.Take((int)T1.HostSize).ToArray();
            var t1 = (T1?)T1.TakeFromBytes(compBytes);

            if (t1 != null)
            {
                yield return (new Entity(entity), t1);
            }
        }
    }
}