// /***************************************************************************
// Aaru Data Preservation Suite
// ----------------------------------------------------------------------------
//
// Filename       : VirtualPC.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 Aaru.Checksums;
using Aaru.CommonTypes;
using Aaru.DiscImages;
using Aaru.Filters;
using FluentAssertions.Execution;
using NUnit.Framework;

namespace Aaru.Tests.Images.VirtualPC
{
    [TestFixture]
    public class VirtualPc
    {
readonly string[] _testFiles =
{/*
"vpc106b_fixed_150mb_fat16.lz",
"vpc213_fixed_50mb_fat16.lz",
"vpc303_fixed_30mb_fat16.lz",
"vpc30_fixed_30mb_fat16.lz",
"vpc4_fixed_130mb_fat16.lz",*/
"vpc504_dynamic_250mb.lz",
"vpc504_fixed_10mb.lz",
"vpc50_dynamic_250mb.lz",
"vpc50_fixed_10mb.lz",
"vpc601_dynamic_250mb.vhd.lz",
"vpc601_fixed_10mb.vhd.lz",
"vpc60_differencing_parent_250mb.vhd.lz",
"vpc60_dynamic_250mb.vhd.lz",
"vpc60_fixed_10mb.vhd.lz",
"vpc702_differencing_parent_250mb.vhd.lz",
"vpc702_dynamic_250mb.vhd.lz",
"vpc702_fixed_10mb.vhd.lz"
};

readonly ulong[] _sectors =
{
// vpc106b_fixed_150mb_fat16.lz
//0,
// vpc213_fixed_50mb_fat16.lz
//0,
// vpc303_fixed_30mb_fat16.lz
//0,
// vpc30_fixed_30mb_fat16.lz
//0,
// vpc4_fixed_130mb_fat16.lz
//0,
// vpc504_dynamic_250mb.lz
511056,
// vpc504_fixed_10mb.lz
20468,
// vpc50_dynamic_250mb.lz
511056,
// vpc50_fixed_10mb.lz
20468,
// vpc601_dynamic_250mb.vhd.lz
511056,
// vpc601_fixed_10mb.vhd.lz
20468,
// vpc60_differencing_parent_250mb.vhd.lz
511056,
// vpc60_dynamic_250mb.vhd.lz
511056,
// vpc60_fixed_10mb.vhd.lz
20468,
// vpc702_differencing_parent_250mb.vhd.lz
511056,
// vpc702_dynamic_250mb.vhd.lz
511056,
// vpc702_fixed_10mb.vhd.lz
20468
};

readonly uint[] _sectorSize =
{
// vpc106b_fixed_150mb_fat16.lz
//512,
// vpc213_fixed_50mb_fat16.lz
//512,
// vpc303_fixed_30mb_fat16.lz
//512,
// vpc30_fixed_30mb_fat16.lz
//512,
// vpc4_fixed_130mb_fat16.lz
//512,
// vpc504_dynamic_250mb.lz
512,
// vpc504_fixed_10mb.lz
512,
// vpc50_dynamic_250mb.lz
512,
// vpc50_fixed_10mb.lz
512,
// vpc601_dynamic_250mb.vhd.lz
512,
// vpc601_fixed_10mb.vhd.lz
512,
// vpc60_differencing_parent_250mb.vhd.lz
512,
// vpc60_dynamic_250mb.vhd.lz
512,
// vpc60_fixed_10mb.vhd.lz
512,
// vpc702_differencing_parent_250mb.vhd.lz
512,
// vpc702_dynamic_250mb.vhd.lz
512,
// vpc702_fixed_10mb.vhd.lz
512
};

readonly MediaType[] _mediaTypes =
{
// vpc106b_fixed_150mb_fat16.lz
//MediaType.Unknown,
// vpc213_fixed_50mb_fat16.lz
//MediaType.Unknown,
// vpc303_fixed_30mb_fat16.lz
//MediaType.Unknown,
// vpc30_fixed_30mb_fat16.lz
//MediaType.Unknown,
// vpc4_fixed_130mb_fat16.lz
//MediaType.Unknown,
// vpc504_dynamic_250mb.lz
MediaType.Unknown,
// vpc504_fixed_10mb.lz
MediaType.Unknown,
// vpc50_dynamic_250mb.lz
MediaType.Unknown,
// vpc50_fixed_10mb.lz
MediaType.Unknown,
// vpc601_dynamic_250mb.vhd.lz
MediaType.Unknown,
// vpc601_fixed_10mb.vhd.lz
MediaType.Unknown,
// vpc60_differencing_parent_250mb.vhd.lz
MediaType.Unknown,
// vpc60_dynamic_250mb.vhd.lz
MediaType.Unknown,
// vpc60_fixed_10mb.vhd.lz
MediaType.Unknown,
// vpc702_differencing_parent_250mb.vhd.lz
MediaType.Unknown,
// vpc702_dynamic_250mb.vhd.lz
MediaType.Unknown,
// vpc702_fixed_10mb.vhd.lz
MediaType.Unknown
};

readonly string[] _md5S =
{
// vpc106b_fixed_150mb_fat16.lz
//"UNKNOWN",
// vpc213_fixed_50mb_fat16.lz
//"UNKNOWN",
// vpc303_fixed_30mb_fat16.lz
//"UNKNOWN",
// vpc30_fixed_30mb_fat16.lz
//"UNKNOWN",
// vpc4_fixed_130mb_fat16.lz
//"UNKNOWN",
// vpc504_dynamic_250mb.lz
"cbcee980986d980f6add1f9622a5f917",
// vpc504_fixed_10mb.lz
"b790693b1c94bed209ee1bb9d0b6a075",
// vpc50_dynamic_250mb.lz
"c0955193d302f5eae2138a3669c89669",
// vpc50_fixed_10mb.lz
"1c843b778d48a67b78e4ca65ab602673",
// vpc601_dynamic_250mb.vhd.lz
"3e3675037a8ec4b78ebafdc2b25e5ceb",
// vpc601_fixed_10mb.vhd.lz
"4b4e98a5bba2469382132f9289ae1c57",
// vpc60_differencing_parent_250mb.vhd.lz
"3e3675037a8ec4b78ebafdc2b25e5ceb",
// vpc60_dynamic_250mb.vhd.lz
"723b2ed575e0e87f253f672f39b3a49f",
// vpc60_fixed_10mb.vhd.lz
"4b4e98a5bba2469382132f9289ae1c57",
// vpc702_differencing_parent_250mb.vhd.lz
"0f6b4f4bb22f02e88e442638f803e4f4",
// vpc702_dynamic_250mb.vhd.lz
"3e3675037a8ec4b78ebafdc2b25e5ceb",
// vpc702_fixed_10mb.vhd.lz
"4b4e98a5bba2469382132f9289ae1c57"
};

        readonly string _dataFolder =
            Path.Combine(Consts.TEST_FILES_ROOT, "Media image formats", "VirtualPC");

        [Test]
        public void Info()
        {
            Environment.CurrentDirectory = _dataFolder;

            Assert.Multiple(() =>
            {
                for(int i = 0; i < _testFiles.Length; i++)
                {
                    var filter = new LZip();
                    filter.Open(_testFiles[i]);

                    var  image  = new Vhd();
                    bool opened = image.Open(filter);

                    Assert.AreEqual(true, opened, $"Open: {_testFiles[i]}");

                    if(!opened)
                        continue;

                    using(new AssertionScope())
                    {
                        Assert.Multiple(() =>
                        {
                            Assert.AreEqual(_sectors[i], image.Info.Sectors, $"Sectors: {_testFiles[i]}");
                            Assert.AreEqual(_sectorSize[i], image.Info.SectorSize, $"Sector size: {_testFiles[i]}");
                            Assert.AreEqual(_mediaTypes[i], image.Info.MediaType, $"Media type: {_testFiles[i]}");
                        });
                    }
                }
            });
        }

        // How many sectors to read at once
        const uint SECTORS_TO_READ = 256;

        [Test]
        public void Hashes()
        {
            Environment.CurrentDirectory = _dataFolder;

            Assert.Multiple(() =>
            {
                for(int i = 0; i < _testFiles.Length; i++)
                {
                    var filter = new LZip();
                    filter.Open(_testFiles[i]);

                    var   image       = new Vhd();
                    bool  opened      = image.Open(filter);
                    ulong doneSectors = 0;

                    Assert.AreEqual(true, opened, $"Open: {_testFiles[i]}");

                    if(!opened)
                        continue;

                    var ctx = new Md5Context();

                    while(doneSectors < image.Info.Sectors)
                    {
                        byte[] sector;

                        if(image.Info.Sectors - doneSectors >= SECTORS_TO_READ)
                        {
                            sector      =  image.ReadSectors(doneSectors, SECTORS_TO_READ);
                            doneSectors += SECTORS_TO_READ;
                        }
                        else
                        {
                            sector      =  image.ReadSectors(doneSectors, (uint)(image.Info.Sectors - doneSectors));
                            doneSectors += image.Info.Sectors - doneSectors;
                        }

                        ctx.Update(sector);
                    }

                    Assert.AreEqual(_md5S[i], ctx.End(), $"Hash: {_testFiles[i]}");
                }
            });
        }
    }
}