using System;
using System.Collections.Generic;
using System.Text;

namespace BspImport.Decompiler.Lumps;

public class BrushLump : BaseLump
{
	public BrushLump( ImportContext context, byte[] data, int version = 0 ) : base( context, data, version )
	{
	}

	protected override void Parse( BinaryReader _reader )
	{
		int brushLength = sizeof( int ) * 3;

		int brushCount = _reader.GetLength() / brushLength;
		Context.Brushes = new Brush[brushCount];

		for ( int i = 0; i < brushCount; i++ )
		{
			var reader = _reader.Split( brushLength );
			int firstSide = reader.ReadInt32();
			int numSides = reader.ReadInt32();
			uint contents = reader.ReadUInt32();
			var contentsFlags = (ContentsFlags)contents;

			Context.Brushes[i] = new Brush( firstSide, numSides, contentsFlags );
		}
	}
}

public struct Brush( int firstSide, int numSides, ContentsFlags contents )
{
	public int FirstSide = firstSide;
	public int NumSides = numSides;
	public ContentsFlags Contents = contents;

	public bool IsClipBrush => (Contents & ContentsFlags.PlayerClip) != 0 || (Contents & ContentsFlags.MonsterClip) != 0;
}