// /***************************************************************************
// The Disc Image Chef
// ----------------------------------------------------------------------------
//
// Filename       : Commands.cs
// Author(s)      : Natalia Portillo <claunia@claunia.com>
//
// Component      : Direct device access.
//
// --[ Description ] ----------------------------------------------------------
//
//     Sends commands to devices.
//
// --[ License ] --------------------------------------------------------------
//
//     This library is free software; you can redistribute it and/or modify
//     it under the terms of the GNU Lesser General Public License as
//     published by the Free Software Foundation; either version 2.1 of the
//     License, or (at your option) any later version.
//
//     This library is distributed in the hope that it will be useful, but
//     WITHOUT ANY WARRANTY; without even the implied warranty of
//     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
//     Lesser General Public License for more details.
//
//     You should have received a copy of the GNU Lesser General Public
//     License along with this library; if not, see <http://www.gnu.org/licenses/>.
//
// ----------------------------------------------------------------------------
// Copyright © 2011-2019 Natalia Portillo
// ****************************************************************************/

using System;
using System.Diagnostics.CodeAnalysis;
using DiscImageChef.Decoders.ATA;

namespace DiscImageChef.Devices
{
    [SuppressMessage("ReSharper", "MemberCanBePrivate.Global")]
    public partial class Device
    {
        /// <summary>
        ///     Sends a SCSI command to this device
        /// </summary>
        /// <returns>0 if no error occurred, otherwise, errno</returns>
        /// <param name="cdb">SCSI CDB</param>
        /// <param name="buffer">Buffer for SCSI command response</param>
        /// <param name="senseBuffer">Buffer with the SCSI sense</param>
        /// <param name="timeout">Timeout in seconds</param>
        /// <param name="direction">SCSI command transfer direction</param>
        /// <param name="duration">Time it took to execute the command in milliseconds</param>
        /// <param name="sense">
        ///     <c>True</c> if SCSI command returned non-OK status and <paramref name="senseBuffer" /> contains
        ///     SCSI sense
        /// </param>
        public int SendScsiCommand(byte[]        cdb,       ref byte[] buffer,   out byte[] senseBuffer, uint timeout,
                                   ScsiDirection direction, out double duration, out bool   sense)
        {
            return Command.SendScsiCommand(PlatformId, FileHandle, cdb, ref buffer, out senseBuffer, timeout, direction,
                                           out duration, out sense);
        }

        /// <summary>
        ///     Sends an ATA/ATAPI command to this device using CHS addressing
        /// </summary>
        /// <returns>0 if no error occurred, otherwise, errno</returns>
        /// <param name="registers">ATA registers.</param>
        /// <param name="errorRegisters">Status/error registers.</param>
        /// <param name="protocol">ATA Protocol.</param>
        /// <param name="transferRegister">Indicates which register indicates the transfer length</param>
        /// <param name="buffer">Buffer for ATA/ATAPI command response</param>
        /// <param name="timeout">Timeout in seconds</param>
        /// <param name="transferBlocks">
        ///     If set to <c>true</c>, transfer is indicated in blocks, otherwise, it is indicated in
        ///     bytes.
        /// </param>
        /// <param name="duration">Time it took to execute the command in milliseconds</param>
        /// <param name="sense"><c>True</c> if ATA/ATAPI command returned non-OK status</param>
        public int SendAtaCommand(AtaRegistersChs registers, out AtaErrorRegistersChs errorRegisters,
                                  AtaProtocol     protocol,  AtaTransferRegister      transferRegister,
                                  ref byte[]      buffer,
                                  uint            timeout,  bool     transferBlocks,
                                  out double      duration, out bool sense)
        {
            return Command.SendAtaCommand(PlatformId, FileHandle, registers, out errorRegisters, protocol,
                                          transferRegister, ref buffer, timeout, transferBlocks, out duration,
                                          out sense);
        }

        /// <summary>
        ///     Sends an ATA/ATAPI command to this device using 28-bit LBA addressing
        /// </summary>
        /// <returns>0 if no error occurred, otherwise, errno</returns>
        /// <param name="registers">ATA registers.</param>
        /// <param name="errorRegisters">Status/error registers.</param>
        /// <param name="protocol">ATA Protocol.</param>
        /// <param name="transferRegister">Indicates which register indicates the transfer length</param>
        /// <param name="buffer">Buffer for ATA/ATAPI command response</param>
        /// <param name="timeout">Timeout in seconds</param>
        /// <param name="transferBlocks">
        ///     If set to <c>true</c>, transfer is indicated in blocks, otherwise, it is indicated in
        ///     bytes.
        /// </param>
        /// <param name="duration">Time it took to execute the command in milliseconds</param>
        /// <param name="sense"><c>True</c> if ATA/ATAPI command returned non-OK status</param>
        public int SendAtaCommand(AtaRegistersLba28 registers, out AtaErrorRegistersLba28 errorRegisters,
                                  AtaProtocol       protocol,  AtaTransferRegister        transferRegister,
                                  ref byte[]        buffer,
                                  uint              timeout,  bool     transferBlocks,
                                  out double        duration, out bool sense)
        {
            return Command.SendAtaCommand(PlatformId, FileHandle, registers, out errorRegisters, protocol,
                                          transferRegister, ref buffer, timeout, transferBlocks, out duration,
                                          out sense);
        }

        /// <summary>
        ///     Sends an ATA/ATAPI command to this device using 48-bit LBA addressing
        /// </summary>
        /// <returns>0 if no error occurred, otherwise, errno</returns>
        /// <param name="registers">ATA registers.</param>
        /// <param name="errorRegisters">Status/error registers.</param>
        /// <param name="protocol">ATA Protocol.</param>
        /// <param name="transferRegister">Indicates which register indicates the transfer length</param>
        /// <param name="buffer">Buffer for ATA/ATAPI command response</param>
        /// <param name="timeout">Timeout in seconds</param>
        /// <param name="transferBlocks">
        ///     If set to <c>true</c>, transfer is indicated in blocks, otherwise, it is indicated in
        ///     bytes.
        /// </param>
        /// <param name="duration">Time it took to execute the command in milliseconds</param>
        /// <param name="sense"><c>True</c> if ATA/ATAPI command returned non-OK status</param>
        public int SendAtaCommand(AtaRegistersLba48 registers, out AtaErrorRegistersLba48 errorRegisters,
                                  AtaProtocol       protocol,  AtaTransferRegister        transferRegister,
                                  ref byte[]        buffer,
                                  uint              timeout,  bool     transferBlocks,
                                  out double        duration, out bool sense)
        {
            return Command.SendAtaCommand(PlatformId, FileHandle, registers, out errorRegisters, protocol,
                                          transferRegister, ref buffer, timeout, transferBlocks, out duration,
                                          out sense);
        }

        /// <summary>
        ///     Sends a MMC/SD command to this device
        /// </summary>
        /// <returns>The result of the command.</returns>
        /// <param name="command">MMC/SD opcode</param>
        /// <param name="buffer">Buffer for MMC/SD command response</param>
        /// <param name="timeout">Timeout in seconds</param>
        /// <param name="duration">Time it took to execute the command in milliseconds</param>
        /// <param name="sense"><c>True</c> if MMC/SD returned non-OK status</param>
        /// <param name="write"><c>True</c> if data is sent from host to card</param>
        /// <param name="isApplication"><c>True</c> if command should be preceded with CMD55</param>
        /// <param name="flags">Flags indicating kind and place of response</param>
        /// <param name="blocks">How many blocks to transfer</param>
        /// <param name="argument">Command argument</param>
        /// <param name="response">Response registers</param>
        /// <param name="blockSize">Size of block in bytes</param>
        public int SendMmcCommand(MmcCommands command, bool write, bool isApplication, MmcFlags flags,
                                  uint        argument,
                                  uint        blockSize, uint     blocks, ref byte[] buffer, out uint[] response,
                                  out double  duration,  out bool sense,  uint       timeout = 0)
        {
            switch(command)
            {
                case MmcCommands.SendCid when cachedCid != null:
                {
                    DateTime start = DateTime.Now;
                    buffer = new byte[cachedCid.Length];
                    Array.Copy(cachedCid, buffer, buffer.Length);
                    response = new uint[4];
                    sense    = false;
                    DateTime end = DateTime.Now;
                    duration = (end - start).TotalMilliseconds;
                    return 0;
                }
                case MmcCommands.SendCsd when cachedCid != null:
                {
                    DateTime start = DateTime.Now;
                    buffer = new byte[cachedCsd.Length];
                    Array.Copy(cachedCsd, buffer, buffer.Length);
                    response = new uint[4];
                    sense    = false;
                    DateTime end = DateTime.Now;
                    duration = (end - start).TotalMilliseconds;
                    return 0;
                }
                case (MmcCommands)SecureDigitalCommands.SendScr when cachedScr != null:
                {
                    DateTime start = DateTime.Now;
                    buffer = new byte[cachedScr.Length];
                    Array.Copy(cachedScr, buffer, buffer.Length);
                    response = new uint[4];
                    sense    = false;
                    DateTime end = DateTime.Now;
                    duration = (end - start).TotalMilliseconds;
                    return 0;
                }
            }

            if(command != (MmcCommands)SecureDigitalCommands.SendOperatingCondition &&
               command != MmcCommands.SendOpCond || cachedOcr == null)
                return Command.SendMmcCommand(PlatformId, FileHandle, command, write, isApplication, flags, argument,
                                              blockSize, blocks, ref buffer, out response, out duration, out sense,
                                              timeout);

            {
                DateTime start = DateTime.Now;
                buffer = new byte[cachedOcr.Length];
                Array.Copy(cachedOcr, buffer, buffer.Length);
                response = new uint[4];
                sense    = false;
                DateTime end = DateTime.Now;
                duration = (end - start).TotalMilliseconds;
                return 0;
            }
        }
    }
}