using System.IO;

namespace MyNes.Core;

[BoardInfo("Sachen Poker", 243)]
[HassIssues]
internal class Mapper243 : Board
{
	private int addr;

	private int chr_reg;

	internal override string Issues => MNInterfaceLanguage.IssueMapper243;

	internal override void HardReset()
	{
		base.HardReset();
		addr = (chr_reg = 0);
	}

	internal override void WriteEX(ref ushort address, ref byte data)
	{
		if (address >= 20480 || address < 16416)
		{
			return;
		}
		switch (address & 0x4101)
		{
		case 16640:
			addr = data & 7;
			break;
		case 16641:
			switch (addr)
			{
			case 2:
				chr_reg = ((data << 3) & 8) | (chr_reg & 7);
				Switch08KCHR(chr_reg);
				break;
			case 4:
				chr_reg = (data & 1) | (chr_reg & 0xE);
				Switch08KCHR(chr_reg);
				break;
			case 5:
				Switch32KPRG(data & 7, PRGArea.Area8000);
				break;
			case 6:
				chr_reg = ((data & 3) << 1) | (chr_reg & 9);
				Switch08KCHR(chr_reg);
				break;
			case 7:
				switch ((data >> 1) & 3)
				{
				case 0:
					Switch01KNMTFromMirroring(Mirroring.Horz);
					break;
				case 1:
					Switch01KNMTFromMirroring(Mirroring.Vert);
					break;
				case 2:
					Switch01KNMT(14);
					break;
				case 3:
					Switch01KNMTFromMirroring(Mirroring.OneScB);
					break;
				}
				break;
			case 3:
				break;
			}
			break;
		}
	}

	internal override void WriteStateData(ref BinaryWriter stream)
	{
		base.WriteStateData(ref stream);
		stream.Write(addr);
		stream.Write(chr_reg);
	}

	internal override void ReadStateData(ref BinaryReader stream)
	{
		base.ReadStateData(ref stream);
		addr = stream.ReadInt32();
		chr_reg = stream.ReadInt32();
	}
}