// /***************************************************************************
// Aaru Data Preservation Suite
// ----------------------------------------------------------------------------
//
// Filename       : BlindWrite6.cs
// Author(s)      : Natalia Portillo <claunia@claunia.com>
//
// Component      : Aaru unit testing.
//
// --[ License ] --------------------------------------------------------------
//
//     This program is free software: you can redistribute it and/or modify
//     it under the terms of the GNU General Public License as
//     published by the Free Software Foundation, either version 3 of the
//     License, or (at your option) any later version.
//
//     This program 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 General Public License for more details.
//
//     You should have received a copy of the GNU General Public License
//     along with this program.  If not, see <http://www.gnu.org/licenses/>.
//
// ----------------------------------------------------------------------------
// Copyright © 2011-2021 Natalia Portillo
// ****************************************************************************/

using System;
using System.IO;
using System.Linq;
using Aaru.Checksums;
using Aaru.CommonTypes;
using Aaru.CommonTypes.Enums;
using Aaru.CommonTypes.Interfaces;
using Aaru.CommonTypes.Structs;
using Aaru.Filters;
using FluentAssertions;
using NUnit.Framework;

namespace Aaru.Tests.Images
{
    [TestFixture]
    public class BlindWrite7
    {
        readonly string[] _testFiles =
        {
            "report_cdr.B6T", "report_cdrom.B6T", "report_cdrw.B6T"
        };

        readonly ulong[] _sectors =
        {
            // report_cdr.B6T
            254265,

            // report_cdrom.B6T
            254265,

            // report_cdrw.B6T
            308224
        };

        readonly MediaType[] _mediaTypes =
        {
            // report_cdr.B6T
            MediaType.CDR,

            // report_cdrom.B6T
            MediaType.CDROM,

            // report_cdrw.B6T
            MediaType.CDRW
        };

        readonly string[] _md5S =
        {
            // report_cdr.B6T
            "86b8a763ef6522fccf97f743d7bf4fa3",

            // report_cdrom.B6T
            "bf4bbec517101d0d6f45d2e4d50cb875",

            // report_cdrw.B6T
            "1e55aa420ca8f8ea77d5b597c9cfc19b"
        };

        readonly string[] _longMd5S =
        {
            // report_cdr.B6T
            "a292359cce05849dec1d06ae471ecf9e",

            // report_cdrom.B6T
            "3d3f9cf7d1ba2249b1e7960071e5af46",

            // report_cdrw.B6T
            "3af5f943ddb9427d9c63a4ce3b704db9"
        };

        readonly string[] _subchannelMd5S =
        {
            // report_cdr.B6T
            null,

            // report_cdrom.B6T
            null,

            // report_cdrw.B6T
            null
        };

        readonly int[] _tracks =
        {
            // report_cdr.B6T
            1,

            // report_cdrom.B6T
            1,

            // report_cdrw.B6T
            1
        };

        readonly int[][] _trackSessions =
        {
            // report_cdr.B6T
            new[]
            {
                1
            },

            // report_cdrom.B6T
            new[]
            {
                1
            },

            // report_cdrw.B6T
            new[]
            {
                1
            }
        };

        readonly ulong[][] _trackStarts =
        {
            // report_cdr.B6T
            new ulong[]
            {
                0
            },

            // report_cdrom.B6T
            new ulong[]
            {
                0
            },

            // report_cdrw.B6T
            new ulong[]
            {
                0
            }
        };

        readonly ulong[][] _trackEnds =
        {
            // report_cdr.B6T
            new ulong[]
            {
                254264
            },

            // report_cdrom.B6T
            new ulong[]
            {
                254264
            },

            // report_cdrw.B6T
            new ulong[]
            {
                308223
            }
        };

        readonly ulong[][] _trackPregaps =
        {
            // report_cdr.B6T
            new ulong[]
            {
                150
            },

            // report_cdrom.B6T
            new ulong[]
            {
                150
            },

            // report_cdrw.B6T
            new ulong[]
            {
                150
            }
        };

        readonly byte[][] _trackFlags =
        {
            // report_cdr.B6T
            new byte[]
            {
                4
            },

            // report_cdrom.B6T
            new byte[]
            {
                4
            },

            // report_cdrw.B6T
            new byte[]
            {
                4
            }
        };

        [Test]
        public void Test()
        {
            // How many sectors to read at once
            const uint sectorsToRead = 256;

            Environment.CurrentDirectory = Path.Combine(Consts.TEST_FILES_ROOT, "Media image formats", "BlindWrite 7");

            IFilter[] filters = new IFilter[_testFiles.Length];

            for(int i = 0; i < _testFiles.Length; i++)
            {
                filters[i] = new ZZZNoFilter();
                filters[i].Open(_testFiles[i]);
            }

            IOpticalMediaImage[] images = new IOpticalMediaImage[_testFiles.Length];

            for(int i = 0; i < _testFiles.Length; i++)
            {
                images[i] = new DiscImages.BlindWrite5();
                Assert.AreEqual(true, images[i].Open(filters[i]), $"Open: {_testFiles[i]}");
            }

            for(int i = 0; i < _testFiles.Length; i++)
                Assert.AreEqual(_sectors[i], images[i].Info.Sectors, $"Sectors: {_testFiles[i]}");

            for(int i = 0; i < _testFiles.Length; i++)
                Assert.AreEqual(_mediaTypes[i], images[i].Info.MediaType, $"Media type: {_testFiles[i]}");

            for(int i = 0; i < _testFiles.Length; i++)
                Assert.AreEqual(_tracks[i], images[i].Tracks.Count, $"Tracks: {_testFiles[i]}");

            for(int i = 0; i < _testFiles.Length; i++)
                _trackSessions[i].Should().
                                  BeEquivalentTo(images[i].Tracks.Select(t => t.TrackSession),
                                                 $"Track session: {_testFiles[i]}");

            for(int i = 0; i < _testFiles.Length; i++)
                _trackStarts[i].Should().BeEquivalentTo(images[i].Tracks.Select(t => t.TrackStartSector),
                                                        $"Track start: {_testFiles[i]}");

            for(int i = 0; i < _testFiles.Length; i++)
                _trackEnds[i].Should().
                              BeEquivalentTo(images[i].Tracks.Select(t => t.TrackEndSector),
                                             $"Track end: {_testFiles[i]}");

            for(int i = 0; i < _testFiles.Length; i++)
                _trackPregaps[i].Should().
                                 BeEquivalentTo(images[i].Tracks.Select(t => t.TrackPregap),
                                                $"Track pregap: {_testFiles[i]}");

            for(int i = 0; i < _testFiles.Length; i++)
            {
                int trackNo = 0;

                foreach(Track currentTrack in images[i].Tracks)
                {
                    if(images[i].Info.ReadableSectorTags.Contains(SectorTagType.CdTrackFlags))
                        Assert.AreEqual(_trackFlags[i][trackNo],
                                        images[i].ReadSectorTag(currentTrack.TrackSequence, SectorTagType.CdTrackFlags)
                                            [0], $"Track flags: {_testFiles[i]}, track {currentTrack.TrackSequence}");

                    trackNo++;
                }
            }

            foreach(bool @long in new[]
            {
                false, true
            })
                for(int i = 0; i < _testFiles.Length; i++)
                {
                    var ctx = new Md5Context();

                    foreach(Track currentTrack in images[i].Tracks)
                    {
                        ulong sectors     = currentTrack.TrackEndSector - currentTrack.TrackStartSector + 1;
                        ulong doneSectors = 0;

                        while(doneSectors < sectors)
                        {
                            byte[] sector;

                            if(sectors - doneSectors >= sectorsToRead)
                            {
                                sector = @long ? images[i].
                                                 ReadSectorsLong(doneSectors, sectorsToRead, currentTrack.TrackSequence)
                                             : images[i].
                                                 ReadSectors(doneSectors, sectorsToRead, currentTrack.TrackSequence);

                                doneSectors += sectorsToRead;
                            }
                            else
                            {
                                sector = @long ? images[i].ReadSectorsLong(doneSectors, (uint)(sectors - doneSectors),
                                                                           currentTrack.TrackSequence)
                                             : images[i].ReadSectors(doneSectors, (uint)(sectors - doneSectors),
                                                                     currentTrack.TrackSequence);

                                doneSectors += sectors - doneSectors;
                            }

                            ctx.Update(sector);
                        }
                    }

                    Assert.AreEqual(@long ? _longMd5S[i] : _md5S[i], ctx.End(),
                                    $"{(@long ? "Long hash" : "Hash")}: {_testFiles[i]}");
                }

            for(int i = 0; i < _testFiles.Length; i++)
                if(images[i].Info.ReadableSectorTags.Contains(SectorTagType.CdSectorSubchannel))
                {
                    var ctx = new Md5Context();

                    foreach(Track currentTrack in images[i].Tracks)
                    {
                        ulong sectors     = currentTrack.TrackEndSector - currentTrack.TrackStartSector + 1;
                        ulong doneSectors = 0;

                        while(doneSectors < sectors)
                        {
                            byte[] sector;

                            if(sectors - doneSectors >= sectorsToRead)
                            {
                                sector = images[i].ReadSectorsTag(doneSectors, sectorsToRead,
                                                                  currentTrack.TrackSequence,
                                                                  SectorTagType.CdSectorSubchannel);

                                doneSectors += sectorsToRead;
                            }
                            else
                            {
                                sector = images[i].ReadSectorsTag(doneSectors, (uint)(sectors - doneSectors),
                                                                  currentTrack.TrackSequence,
                                                                  SectorTagType.CdSectorSubchannel);

                                doneSectors += sectors - doneSectors;
                            }

                            ctx.Update(sector);
                        }
                    }

                    Assert.AreEqual(_subchannelMd5S[i], ctx.End(), $"Subchannel hash: {_testFiles[i]}");
                }
        }
    }
}