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

namespace Sunless.Architecture;

// Everything here is cut from Footprint, not Open - the house is already out of it.
public static partial class ArchPorchGen
{
	static void Plinth( ArchMesh canvas, ArchPorchShape shape, ArchKit kit, ArchBrush brush )
	{
		var skirt = ArchFootprint.Shrink( new[] { shape.Footprint }, 2.5f );
		var top = shape.Deck - MathF.Max( 1f, kit.PorchDeckThickness );

		foreach ( var loop in skirt )
		{
			ArchFloorGen.Slab( canvas, loop, null, shape.Grade, top, brush );
		}
	}

	// One slab - the texture already draws the board courses at 128 px/m.
	static void Deck( ArchMesh canvas, ArchPorchShape shape, ArchKit kit, ArchBrush brush )
	{
		ArchFloorGen.Slab( canvas, shape.Footprint, null, shape.Deck - MathF.Max( 1f, kit.PorchDeckThickness ), shape.Deck, brush );
	}

	// Only the open edges get the lip - the house side has no edge to show.
	static void Nosing( ArchMesh canvas, ArchPorchShape shape, ArchKit kit, ArchBrush brush )
	{
		const float proud = 1.3f;
		const float drop = 0.7f;

		var bottom = shape.Deck - MathF.Max( 1f, kit.PorchDeckThickness ) - drop;

		foreach ( var run in shape.Open )
		{
			ArchBandSection.Between( 0f, proud, bottom, shape.Deck ).Emit( canvas, run, brush );
		}
	}
}