// /***************************************************************************
// The Disc Image Chef
// ----------------------------------------------------------------------------
//
// Filename       : 3C_HP.cs
// Author(s)      : Natalia Portillo <claunia@claunia.com>
//
// Component      : Device structures decoders.
//
// --[ Description ] ----------------------------------------------------------
//
//     Decodes HP MODE PAGE 3Ch: Device Time 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 © 2011-2018 Natalia Portillo
// ****************************************************************************/

using System;
using System.Text;

namespace DiscImageChef.Decoders.SCSI
{
    public static partial class Modes
    {
        #region HP Mode Page 0x3C: Device Time Mode page
        public struct HP_ModePage_3C
        {
            /// <summary>
            /// Parameters can be saved
            /// </summary>
            public bool PS;
            public bool LT;
            public bool WT;
            public bool PT;
            public ushort CurrentPowerOn;
            public uint PowerOnTime;
            public bool UTC;
            public bool NTP;
            public uint WorldTime;
            public byte LibraryHours;
            public byte LibraryMinutes;
            public byte LibrarySeconds;
            public uint CumulativePowerOn;
        }

        public static HP_ModePage_3C? DecodeHPModePage_3C(byte[] pageResponse)
        {
            if((pageResponse?[0] & 0x40) == 0x40) return null;

            if((pageResponse?[0] & 0x3F) != 0x3C) return null;

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

            if(pageResponse.Length != 36) return null;

            HP_ModePage_3C decoded = new HP_ModePage_3C();

            decoded.PS |= (pageResponse[0] & 0x80) == 0x80;
            decoded.LT |= (pageResponse[2] & 0x04) == 0x04;
            decoded.WT |= (pageResponse[2] & 0x02) == 0x02;
            decoded.PT |= (pageResponse[2] & 0x01) == 0x01;
            decoded.CurrentPowerOn = (ushort)((pageResponse[6] << 8) + pageResponse[7]);
            decoded.PowerOnTime = (uint)((pageResponse[8] << 24) + (pageResponse[9] << 16) + (pageResponse[10] << 8) +
                                         pageResponse[11]);
            decoded.UTC |= (pageResponse[14] & 0x02) == 0x02;
            decoded.NTP |= (pageResponse[14] & 0x01) == 0x01;
            decoded.WorldTime = (uint)((pageResponse[16] << 24) + (pageResponse[17] << 16) + (pageResponse[18] << 8) +
                                       pageResponse[19]);
            decoded.LibraryHours = pageResponse[23];
            decoded.LibraryMinutes = pageResponse[24];
            decoded.LibrarySeconds = pageResponse[25];
            decoded.CumulativePowerOn = (uint)((pageResponse[32] << 24) + (pageResponse[33] << 16) +
                                               (pageResponse[34] << 8) + pageResponse[35]);

            return decoded;
        }

        public static string PrettifyHPModePage_3C(byte[] pageResponse)
        {
            return PrettifyHPModePage_3C(DecodeHPModePage_3C(pageResponse));
        }

        public static string PrettifyHPModePage_3C(HP_ModePage_3C? modePage)
        {
            if(!modePage.HasValue) return null;

            HP_ModePage_3C page = modePage.Value;
            StringBuilder sb = new StringBuilder();

            sb.AppendLine("HP Device Time Mode Page:");

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

            if(page.PT)
            {
                sb.AppendFormat("\tDrive has been powered up {0} times", page.CurrentPowerOn);
                sb.AppendFormat("\tDrive has been powered up since {0} this time",
                                TimeSpan.FromSeconds(page.PowerOnTime)).AppendLine();
                sb.AppendFormat("\tDrive has been powered up a total of {0}",
                                TimeSpan.FromSeconds(page.CumulativePowerOn)).AppendLine();
            }

            if(page.WT)
            {
                sb.AppendFormat("\tDrive's date/time is: {0}", DateHandlers.UNIXUnsignedToDateTime(page.WorldTime))
                  .AppendLine();
                if(page.UTC) sb.AppendLine("\tDrive's time is UTC");
                if(page.NTP) sb.AppendLine("\tDrive's time is synchronized with a NTP source");
            }

            if(page.LT)
                sb.AppendFormat("\tLibrary time is {0}",
                                new DateTime(DateTime.Now.Year, DateTime.Now.Month, DateTime.Now.Day, page.LibraryHours,
                                             page.LibraryMinutes, page.LibrarySeconds)).AppendLine();

            return sb.ToString();
        }
        #endregion HP Mode Page 0x3C: Device Time Mode page
    }
}