using System;
using System.Runtime.InteropServices;

namespace DiscImageChef.Devices.Windows
{
    [StructLayout(LayoutKind.Sequential)]
    struct ScsiPassThroughDirect
    {
        public ushort Length;
        public byte ScsiStatus;
        public byte PathId;
        public byte TargetId;
        public byte Lun;
        public byte CdbLength;
        public byte SenseInfoLength;
        [MarshalAs(UnmanagedType.U1)]
        public ScsiIoctlDirection DataIn;
        public uint DataTransferLength;
        public uint TimeOutValue;
        public IntPtr DataBuffer;
        public uint SenseInfoOffset;
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 16)]
        public byte[] Cdb;
    };

    [StructLayout(LayoutKind.Sequential)]
    struct ScsiPassThroughDirectAndSenseBuffer
    {
        public ScsiPassThroughDirect sptd;
        [MarshalAs(UnmanagedType.ByValArray, SizeConst = 32)]
        public byte[] SenseBuf;
    }

    struct AtaPassThroughDirect
    {
        public ushort Length;
        public AtaFlags AtaFlags;
        public byte PathId;
        public byte TargetId;
        public byte Lun;
        public byte ReservedAsUchar;
        public uint DataTransferLength;
        public uint TimeOutValue;
        public uint ReservedAsUlong;
        public IntPtr DataBuffer;
        public AtaTaskFile PreviousTaskFile;
        public AtaTaskFile CurrentTaskFile;
    }

    [StructLayout(LayoutKind.Explicit)]
    struct AtaTaskFile
    {
        // Fields for commands sent
        [FieldOffset(0)] public byte Features;
        [FieldOffset(6)] public byte Command;

        // Fields on command return
        [FieldOffset(0)] public byte Error;
        [FieldOffset(6)] public byte Status;

        // Common fields
        [FieldOffset(1)] public byte SectorCount;
        [FieldOffset(2)] public byte SectorNumber;
        [FieldOffset(3)] public byte CylinderLow;
        [FieldOffset(4)] public byte CylinderHigh;
        [FieldOffset(5)] public byte DeviceHead;
        [FieldOffset(7)] public byte Reserved;
    }
}