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

namespace Sunless.Architecture;

public sealed class ArchRoomManifest : ArchKindManifest<ArchRoom> {
	public override ArchKind Kind => ArchKind.Room;

	public override string Slot => "Rooms";

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

	public override string Label => "Room";

	public override string Glyph => ArchIcons.Get( "subtool_room", "crop_square" );

	public override string HostOutput => "Room footprint or boundary";

	public override IEnumerable<ArchKind> Children => new[]
	{
		ArchKind.Wall, ArchKind.Stair, ArchKind.Trim, ArchKind.Pillar, ArchKind.Span,
		ArchKind.Beam, ArchKind.Cabinet, ArchKind.Porch, ArchKind.Approach
	};

	public override int IndirectRank => 200;

	public override IEnumerable<object> Filed( ArchPlan plan, object host ) {
		if ( host is not ArchBuilding building ) {
			return Array.Empty<object>();
		}

		return building.Rooms.Where( room => !room.Spans );
	}

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

		var footprint = ArchFloorGen.Footprint( room );

		if ( footprint.Count < 3 ) {
			return Array.Empty<List<Vector2>>();
		}

		return new List<List<Vector2>> { footprint };
	}

	public override float Height( object payload, float fallback ) {
		return payload is ArchRoom room ? room.BaseHeight : fallback;
	}
}