using System;
using System.Linq;
using Editor;
using Sandbox;

namespace Sunless.Architecture;

public static class ArchSpanUi
{
	public static void Build( ToolSidebarWidget panel, ArchSpanPart span, Action refresh, Action changed )
	{
		using ( var forms = ArchIconGrid.In( panel.AddGroup( "Form" ) ) )
		{
			foreach ( var value in Enum.GetValues<PillarSpan>().Where( value => value != PillarSpan.None ) )
			{
				var captured = value;

				forms.Pick( $"Span: {Hint( captured )}", $"span_{captured}".ToLowerInvariant(), Glyph( captured ),
					span.Form == captured, () => { span.Form = captured; refresh?.Invoke(); changed?.Invoke(); } );
			}
		}

		var group = panel.AddGroup( "Section" );

		group.Add( ArchPartUi.Number( "Thickness (0 takes the piers')", span.Thickness, 0f, value => span.Thickness = value, changed ) );
		group.Add( ArchPartUi.Number( "Drop below the head", span.Drop, 0f, value => span.Drop = value, changed ) );
		group.Add( ArchPartUi.Number( "Springs from floor (0 takes the rise)", span.Springing, 0f, value => span.Springing = value, changed ) );

		if ( span.Form == PillarSpan.Beam )
		{
			group.Add( ArchPartUi.Number( "Depth", span.BeamDepth, 18f, value => span.BeamDepth = value, changed ) );

			return;
		}

		group.Add( ArchPartUi.Number( "Rise", span.Rise, 48f, value => span.Rise = value, changed ) );

		if ( span.Form == PillarSpan.Arch )
		{
			group.Add( ArchPartUi.Number( "Ring", span.Ring, 10f, value => span.Ring = value, changed ) );
		}

		group.Add( ArchPartUi.Integer( "Segments", span.Segments, 10, value => span.Segments = value, changed ) );
	}

	public static string Hint( PillarSpan form ) => form switch
	{
		PillarSpan.Beam => "a straight block from pier to pier",
		PillarSpan.Arch => "a ring turned between them",
		PillarSpan.Haunch => "a cove filling the corner at each end, with nothing between",
		_ => "nothing between them"
	};

	public static string Glyph( PillarSpan form ) => form switch
	{
		PillarSpan.Beam => "horizontal_rule",
		PillarSpan.Arch => "bridge",
		PillarSpan.Haunch => "rounded_corner",
		_ => "block"
	};
}