using System;
using System.Collections.Generic;
using System.Linq;
using Sandbox;

namespace Sunless.Architecture;

public sealed class ArchBeamManifest : ArchKindManifest<ArchBeamPart> {
	public override ArchKind Kind => ArchKind.Beam;

	public override string Slot => "Beams";

	public override IEnumerable<Type> Hosts => new[] { typeof( ArchRoom ) };

	public override string Label => "Beams";

	public override string Glyph => "view_stream";

	// Timber hung under a plane is the same drag as a box standing on one, so it rides the boolean tool.
	public override string Subtool => ArchSubtools.Bool;

	public override int DirectRank => 9;

	public override ArchLayerStage Stage( object payload ) => ArchLayerStage.Structure;

	public override IReadOnlyList<List<Vector2>> Loops( object payload ) {
		if ( payload is not ArchBeamPart beam ) {
			return Array.Empty<List<Vector2>>();
		}

		var outline = beam.Outline();

		return outline.Count >= 3 ? new List<List<Vector2>> { outline } : Array.Empty<List<Vector2>>();
	}

	public override float Height( object payload, float fallback ) {
		return payload is ArchBeamPart beam ? beam.Soffit : fallback;
	}
}