using System.IO;

namespace MyNes.Core;

[BoardInfo("Unknown", 60)]
[HassIssues]
internal class Mapper060 : Board
{
	private int latch;

	private byte menu;

	internal override string Issues => MNInterfaceLanguage.IssueMapper60;

	internal override void HardReset()
	{
		base.HardReset();
		latch = 0;
		menu = 0;
	}

	internal override void SoftReset()
	{
		base.SoftReset();
		latch = 0;
		menu = (byte)((uint)(menu + 1) & 3u);
		Switch08KCHR(menu);
		Switch16KPRG(menu, PRGArea.Area8000);
		Switch16KPRG(menu, PRGArea.AreaC000);
	}

	internal override void WritePRG(ref ushort address, ref byte data)
	{
		latch = address & 0x100;
		Switch01KNMTFromMirroring(((address & 8) == 8) ? Mirroring.Horz : Mirroring.Vert);
		Switch16KPRG((address >> 4) & ~((~address >> 7) & 1), PRGArea.Area8000);
		Switch16KPRG((address >> 4) | ((~address >> 7) & 1), PRGArea.AreaC000);
		Switch08KCHR(address);
	}

	internal override void ReadPRG(ref ushort address, out byte data)
	{
		if (latch == 0)
		{
			base.ReadPRG(ref address, out data);
		}
		else
		{
			data = menu;
		}
	}

	internal override void WriteStateData(ref BinaryWriter stream)
	{
		base.WriteStateData(ref stream);
		stream.Write(latch);
		stream.Write(menu);
	}

	internal override void ReadStateData(ref BinaryReader stream)
	{
		base.ReadStateData(ref stream);
		latch = stream.ReadInt32();
		menu = stream.ReadByte();
	}
}