// /***************************************************************************
// The Disc Image Chef
// ----------------------------------------------------------------------------
//
// Filename       : 22_Certance.cs
// Author(s)      : Natalia Portillo <claunia@claunia.com>
//
// Component      : Device structures decoders.
//
// --[ Description ] ----------------------------------------------------------
//
//     Decodes Certance MODE PAGE 22h: Interface Control Mode Page.
//
// --[ 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.Diagnostics.CodeAnalysis;
using System.Text;

namespace DiscImageChef.Decoders.SCSI
{
    [SuppressMessage("ReSharper", "InconsistentNaming")]
    [SuppressMessage("ReSharper", "MemberCanBeInternal")]
    [SuppressMessage("ReSharper", "MemberCanBePrivate.Global")]
    [SuppressMessage("ReSharper", "NotAccessedField.Global")]
    public static partial class Modes
    {
        #region Certance Mode Page 0x22: Interface Control Mode Page
        public struct Certance_ModePage_22
        {
            /// <summary>
            ///     Parameters can be saved
            /// </summary>
            public bool PS;
            public byte BaudRate;
            public byte CmdFwd;
            public bool StopBits;
            public byte Alerts;
            public byte PortATransportType;
            public byte PortAPresentSelectionID;
            public byte NextSelectionID;
            public byte JumperedSelectionID;
            public byte TargetInitiatedBusControl;
            public bool PortAEnabled;
            public bool PortAEnabledOnPower;
        }

        public static Certance_ModePage_22? DecodeCertanceModePage_22(byte[] pageResponse)
        {
            if((pageResponse?[0] & 0x40) == 0x40) return null;

            if((pageResponse?[0] & 0x3F) != 0x22) return null;

            if(pageResponse[1] + 2 != pageResponse.Length) return null;

            if(pageResponse.Length != 16) return null;

            Certance_ModePage_22 decoded = new Certance_ModePage_22();

            decoded.PS                        |= (pageResponse[0] & 0x80) == 0x80;
            decoded.BaudRate                  =  pageResponse[2];
            decoded.CmdFwd                    =  (byte)((pageResponse[3] & 0x18) >> 3);
            decoded.StopBits                  |= (pageResponse[3]       & 0x04) == 0x04;
            decoded.CmdFwd                    =  (byte)(pageResponse[3] & 0x03);
            decoded.PortATransportType        =  pageResponse[4];
            decoded.PortAPresentSelectionID   =  pageResponse[7];
            decoded.NextSelectionID           =  pageResponse[12];
            decoded.JumperedSelectionID       =  pageResponse[13];
            decoded.TargetInitiatedBusControl =  pageResponse[14];
            decoded.PortAEnabled              |= (pageResponse[15] & 0x10) == 0x10;
            decoded.PortAEnabledOnPower       |= (pageResponse[15] & 0x04) == 0x04;

            return decoded;
        }

        public static string PrettifyCertanceModePage_22(byte[] pageResponse) =>
            PrettifyCertanceModePage_22(DecodeCertanceModePage_22(pageResponse));

        public static string PrettifyCertanceModePage_22(Certance_ModePage_22? modePage)
        {
            if(!modePage.HasValue) return null;

            Certance_ModePage_22 page = modePage.Value;
            StringBuilder        sb   = new StringBuilder();

            sb.AppendLine("Certance Interface Control Mode Page:");

            if(page.PS) sb.AppendLine("\tParameters can be saved");

            switch(page.BaudRate)
            {
                case 0:
                case 1:
                case 2:
                    sb.AppendLine("\tLibrary interface will operate at 9600 baud on next reset");
                    break;
                case 3:
                    sb.AppendLine("\tLibrary interface will operate at 19200 baud on next reset");
                    break;
                case 4:
                    sb.AppendLine("\tLibrary interface will operate at 38400 baud on next reset");
                    break;
                case 5:
                    sb.AppendLine("\tLibrary interface will operate at 57600 baud on next reset");
                    break;
                case 6:
                    sb.AppendLine("\tLibrary interface will operate at 115200 baud on next reset");
                    break;
                default:
                    sb.AppendFormat("\tUnknown library interface baud rate code {0}", page.BaudRate).AppendLine();
                    break;
            }

            sb.AppendLine(page.StopBits
                              ? "Library interface transmits 2 stop bits per byte"
                              : "Library interface transmits 1 stop bits per byte");

            switch(page.CmdFwd)
            {
                case 0:
                    sb.AppendLine("\tCommand forwarding is disabled");
                    break;
                case 1:
                    sb.AppendLine("\tCommand forwarding is enabled");
                    break;
                default:
                    sb.AppendFormat("\tUnknown command forwarding code {0}", page.CmdFwd).AppendLine();
                    break;
            }

            switch(page.PortATransportType)
            {
                case 0:
                    sb.AppendLine("\tPort A link is down");
                    break;
                case 3:
                    sb.AppendLine("\tPort A uses Parallel SCSI Ultra-160 interface");
                    break;
                default:
                    sb.AppendFormat("\tUnknown port A transport type code {0}", page.PortATransportType).AppendLine();
                    break;
            }

            if(page.PortATransportType > 0)
                sb.AppendFormat("\tDrive responds to SCSI ID {0}", page.PortAPresentSelectionID).AppendLine();

            sb.AppendFormat("\tDrive will respond to SCSI ID {0} on Port A enabling", page.NextSelectionID)
              .AppendLine();
            sb.AppendFormat("\tDrive jumpers choose SCSI ID {0}", page.JumperedSelectionID).AppendLine();

            sb.AppendLine(page.PortAEnabled ? "\tSCSI port is enabled" : "\tSCSI port is disabled");

            sb.AppendLine(page.PortAEnabledOnPower
                              ? "\tSCSI port will be enabled on next power up"
                              : "\tSCSI port will be disabled on next power up");

            return sb.ToString();
        }
        #endregion Certance Mode Page 0x22: Interface Control Mode Page
    }
}