#nullable enable
using System.Collections.Generic;
using Robust.Shared.GameObjects;
using Robust.Shared.Serialization.Manager.Attributes;

namespace Content.Server.GameObjects.Components.NodeContainer.Nodes
{
    /// <summary>
    ///     A <see cref="Node"/> that can reach other <see cref="AdjacentNode"/>s that are directly adjacent to it.
    /// </summary>
    [DataDefinition]
    public class AdjacentNode : Node
    {
        protected override IEnumerable<Node> GetReachableNodes()
        {
            if (!Owner.TryGetComponent(out SnapGridComponent? snap))
                yield break;

            foreach (var cell in snap.GetCardinalNeighborCells())
            foreach (var entity in cell.GetLocal())
            {
                if (!entity.TryGetComponent<NodeContainerComponent>(out var container)) continue;

                foreach (var node in container.Nodes.Values)
                {
                    if (node != null && node != this)
                    {
                        yield return node;
                    }
                }

            }
        }
    }
}