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

namespace Sunless.Architecture;

public sealed class ArchCarvedStairManifest : ArchKindManifest
{
	public override ArchKind Kind => ArchKind.CarvedStair;

	// A carved flight IS an ArchStairPart: the Stair manifest claims the type, and only the platform it is filed on
	// tells the two kinds apart, so claiming it twice would collide.
	public override Type Payload => null;

	public override string Slot => "Stairs";

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

	public override string Label => "Carved stair";

	public override string Glyph => "stairs";

	public override string Subtool => ArchSubtools.Stair;

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

	public override string NameOf( object payload, int id )
	{
		return payload is ArchStairPart stair ? stair.Name : base.NameOf( payload, id );
	}

	public override bool TryRename( object payload, string name )
	{
		if ( string.IsNullOrWhiteSpace( name ) || payload is not ArchStairPart stair )
		{
			return false;
		}

		stair.Name = name;

		return true;
	}

	public override IEnumerable<object> Filed( ArchPlan plan, object host )
	{
		return host is ArchPlatformPart platform ? platform.Stairs : Array.Empty<object>();
	}

	public override bool File( object host, object payload )
	{
		if ( host is not ArchPlatformPart platform || payload is not ArchStairPart stair )
		{
			return false;
		}

		platform.Stairs.Add( stair );

		return true;
	}

	public override bool Unfile( ArchPlan plan, object payload )
	{
		return plan is not null && payload is ArchStairPart stair
			&& plan.Buildings.SelectMany( building => building.Platforms ).Any( platform => platform.Stairs.Remove( stair ) );
	}
}