using System.IO;

namespace MyNes.Core;

[BoardInfo("Irem G-101", 32)]
internal class Mapper032 : Board
{
	private bool prg_mode;

	private byte prg_reg0;

	private bool enable_mirroring_switch;

	internal override void HardReset()
	{
		base.HardReset();
		enable_mirroring_switch = true;
		if (SHA1 == "7E4180432726A433C46BA2206D9E13B32761C11E")
		{
			enable_mirroring_switch = false;
			Switch01KNMTFromMirroring(Mirroring.OneScA);
		}
		Switch08KPRG(PRG_ROM_08KB_Mask, PRGArea.AreaE000);
	}

	internal override void WritePRG(ref ushort address, ref byte data)
	{
		switch (address & 0xF007)
		{
		case 32768:
		case 32769:
		case 32770:
		case 32771:
		case 32772:
		case 32773:
		case 32774:
		case 32775:
			prg_reg0 = data;
			Switch08KPRG((!prg_mode) ? prg_reg0 : 0, PRGArea.Area8000);
			Switch08KPRG(prg_mode ? prg_reg0 : (PRG_ROM_08KB_Mask - 1), PRGArea.AreaC000);
			break;
		case 36864:
		case 36865:
		case 36866:
		case 36867:
		case 36868:
		case 36869:
		case 36870:
		case 36871:
			prg_mode = (data & 2) == 2;
			Switch08KPRG((!prg_mode) ? prg_reg0 : 0, PRGArea.Area8000);
			Switch08KPRG(prg_mode ? prg_reg0 : (PRG_ROM_08KB_Mask - 1), PRGArea.AreaC000);
			if (enable_mirroring_switch)
			{
				Switch01KNMTFromMirroring(((data & 1) == 1) ? Mirroring.Horz : Mirroring.Vert);
			}
			break;
		case 40960:
		case 40961:
		case 40962:
		case 40963:
		case 40964:
		case 40965:
		case 40966:
		case 40967:
			Switch08KPRG(data, PRGArea.AreaA000);
			break;
		case 45056:
			Switch01KCHR(data, CHRArea.Area0000);
			break;
		case 45057:
			Switch01KCHR(data, CHRArea.Area0400);
			break;
		case 45058:
			Switch01KCHR(data, CHRArea.Area0800);
			break;
		case 45059:
			Switch01KCHR(data, CHRArea.Area0C00);
			break;
		case 45060:
			Switch01KCHR(data, CHRArea.Area1000);
			break;
		case 45061:
			Switch01KCHR(data, CHRArea.Area1400);
			break;
		case 45062:
			Switch01KCHR(data, CHRArea.Area1800);
			break;
		case 45063:
			Switch01KCHR(data, CHRArea.Area1C00);
			break;
		}
	}

	internal override void WriteStateData(ref BinaryWriter stream)
	{
		base.WriteStateData(ref stream);
		stream.Write(prg_mode);
		stream.Write(prg_reg0);
	}

	internal override void ReadStateData(ref BinaryReader stream)
	{
		base.ReadStateData(ref stream);
		prg_mode = stream.ReadBoolean();
		prg_reg0 = stream.ReadByte();
	}
}