using System.IO;

namespace MyNes.Core;

[BoardInfo("Unknown", 207)]
[HassIssues]
internal class Mapper207 : Board
{
	private int mirroring0;

	private int mirroring1;

	internal override string Issues => MNInterfaceLanguage.IssueMapper207;

	internal override void HardReset()
	{
		base.HardReset();
		Switch08KPRG(PRG_ROM_08KB_Mask, PRGArea.AreaE000);
	}

	internal override void WriteSRM(ref ushort address, ref byte data)
	{
		switch (address)
		{
		case 32496:
			Switch02KCHR(data & 0x3F, CHRArea.Area0000);
			mirroring0 = (data >> 7) & 1;
			break;
		case 32497:
			Switch02KCHR(data & 0x3F, CHRArea.Area0800);
			mirroring1 = (data >> 7) & 1;
			break;
		case 32498:
			Switch01KCHR(data, CHRArea.Area1000);
			break;
		case 32499:
			Switch01KCHR(data, CHRArea.Area1400);
			break;
		case 32500:
			Switch01KCHR(data, CHRArea.Area1800);
			break;
		case 32501:
			Switch01KCHR(data, CHRArea.Area1C00);
			break;
		case 32506:
		case 32507:
			Switch08KPRG(data, PRGArea.Area8000);
			break;
		case 32508:
		case 32509:
			Switch08KPRG(data, PRGArea.AreaA000);
			break;
		case 32510:
		case 32511:
			Switch08KPRG(data, PRGArea.AreaC000);
			break;
		case 32502:
		case 32503:
		case 32504:
		case 32505:
			break;
		}
	}

	internal override void ReadNMT(ref ushort address, out byte data)
	{
		switch ((address >> 10) & 3)
		{
		case 0:
		case 1:
			data = NMT_RAM[mirroring0][address & 0x3FF];
			break;
		case 2:
		case 3:
			data = NMT_RAM[mirroring1][address & 0x3FF];
			break;
		default:
			data = 0;
			break;
		}
	}

	internal override void WriteNMT(ref ushort address, ref byte data)
	{
		switch ((address >> 10) & 3)
		{
		case 0:
		case 1:
			NMT_RAM[mirroring0][address & 0x3FF] = data;
			break;
		case 2:
		case 3:
			NMT_RAM[mirroring1][address & 0x3FF] = data;
			break;
		}
	}

	internal override void WriteStateData(ref BinaryWriter stream)
	{
		base.WriteStateData(ref stream);
		stream.Write(mirroring0);
		stream.Write(mirroring1);
	}

	internal override void ReadStateData(ref BinaryReader stream)
	{
		base.ReadStateData(ref stream);
		mirroring0 = stream.ReadInt32();
		mirroring1 = stream.ReadInt32();
	}
}