// /***************************************************************************
// The Disc Image Chef
// ----------------------------------------------------------------------------
//
// Filename       : Statistics.cs
// Author(s)      : Natalia Portillo <claunia@claunia.com>
//
// Component      : Core algorithms.
//
// --[ Description ] ----------------------------------------------------------
//
//     Handles usage statistics.
//
// --[ 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 © 2011-2020 Natalia Portillo
// ****************************************************************************/

using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading;
using System.Xml.Serialization;
using DiscImageChef.CommonTypes.Interop;
using DiscImageChef.CommonTypes.Metadata;
using DiscImageChef.Database;
using DiscImageChef.Database.Models;
using Microsoft.EntityFrameworkCore;
using Newtonsoft.Json;
using Device = DiscImageChef.Devices.Device;
using MediaType = DiscImageChef.CommonTypes.MediaType;
using OperatingSystem = DiscImageChef.Database.Models.OperatingSystem;
using Version = DiscImageChef.Database.Models.Version;

namespace DiscImageChef.Core
{
    /// <summary>Handles anonymous usage statistics</summary>
    public static class Statistics
    {
        /// <summary>Statistics file semaphore</summary>
        static bool submitStatsLock;

        /// <summary>Loads saved statistics from disk</summary>
        public static void LoadStats()
        {
            var ctx = DicContext.Create(Settings.Settings.LocalDbPath);

            if(File.Exists(Path.Combine(Settings.Settings.StatsPath, "Statistics.xml")))
                try
                {
                    var allStats = new Stats();
                    var xs       = new XmlSerializer(allStats.GetType());
                    var sr       = new StreamReader(Path.Combine(Settings.Settings.StatsPath, "Statistics.xml"));
                    allStats = (Stats)xs.Deserialize(sr);
                    sr.Close();

                    if(allStats.Commands != null)
                    {
                        if(allStats.Commands.Analyze > 0)
                        {
                            Command command = ctx.Commands.FirstOrDefault(c => c.Name == "analyze" && c.Synchronized) ??
                                              new Command
                                              {
                                                  Name = "analyze", Synchronized = true
                                              };

                            command.Count += (ulong)allStats.Commands.Analyze;
                            ctx.Commands.Update(command);
                        }

                        if(allStats.Commands.Checksum > 0)
                        {
                            Command command =
                                ctx.Commands.FirstOrDefault(c => c.Name == "checksum" && c.Synchronized) ?? new Command
                                {
                                    Name = "checksum", Synchronized = true
                                };

                            command.Count += (ulong)allStats.Commands.Checksum;
                            ctx.Commands.Update(command);
                        }

                        if(allStats.Commands.Compare > 0)
                        {
                            Command command = ctx.Commands.FirstOrDefault(c => c.Name == "compare" && c.Synchronized) ??
                                              new Command
                                              {
                                                  Name = "compare", Synchronized = true
                                              };

                            command.Count += (ulong)allStats.Commands.Compare;
                            ctx.Commands.Update(command);
                        }

                        if(allStats.Commands.ConvertImage > 0)
                        {
                            Command command =
                                ctx.Commands.FirstOrDefault(c => c.Name == "convert-image" && c.Synchronized) ??
                                new Command
                                {
                                    Name = "convert-image", Synchronized = true
                                };

                            command.Count += (ulong)allStats.Commands.ConvertImage;
                            ctx.Commands.Update(command);
                        }

                        if(allStats.Commands.CreateSidecar > 0)
                        {
                            Command command =
                                ctx.Commands.FirstOrDefault(c => c.Name == "create-sidecar" && c.Synchronized) ??
                                new Command
                                {
                                    Name = "create-sidecar", Synchronized = true
                                };

                            command.Count += (ulong)allStats.Commands.CreateSidecar;
                            ctx.Commands.Update(command);
                        }

                        if(allStats.Commands.Decode > 0)
                        {
                            Command command = ctx.Commands.FirstOrDefault(c => c.Name == "decode" && c.Synchronized) ??
                                              new Command
                                              {
                                                  Name = "decode", Synchronized = true
                                              };

                            command.Count += (ulong)allStats.Commands.Decode;
                            ctx.Commands.Update(command);
                        }

                        if(allStats.Commands.DeviceInfo > 0)
                        {
                            Command command =
                                ctx.Commands.FirstOrDefault(c => c.Name == "device-info" && c.Synchronized) ??
                                new Command
                                {
                                    Name = "device-info", Synchronized = true
                                };

                            command.Count += (ulong)allStats.Commands.DeviceInfo;
                            ctx.Commands.Update(command);
                        }

                        if(allStats.Commands.DeviceReport > 0)
                        {
                            Command command =
                                ctx.Commands.FirstOrDefault(c => c.Name == "device-report" && c.Synchronized) ??
                                new Command
                                {
                                    Name = "device-report", Synchronized = true
                                };

                            command.Count += (ulong)allStats.Commands.DeviceReport;
                            ctx.Commands.Update(command);
                        }

                        if(allStats.Commands.DumpMedia > 0)
                        {
                            Command command =
                                ctx.Commands.FirstOrDefault(c => c.Name == "dump-media" && c.Synchronized) ??
                                new Command
                                {
                                    Name = "dump-media", Synchronized = true
                                };

                            command.Count += (ulong)allStats.Commands.DumpMedia;
                            ctx.Commands.Update(command);
                        }

                        if(allStats.Commands.Entropy > 0)
                        {
                            Command command = ctx.Commands.FirstOrDefault(c => c.Name == "entropy" && c.Synchronized) ??
                                              new Command
                                              {
                                                  Name = "entropy", Synchronized = true
                                              };

                            command.Count += (ulong)allStats.Commands.Entropy;
                            ctx.Commands.Update(command);
                        }

                        if(allStats.Commands.ExtractFiles > 0)
                        {
                            Command command =
                                ctx.Commands.FirstOrDefault(c => c.Name == "extract-files" && c.Synchronized) ??
                                new Command
                                {
                                    Name = "extract-files", Synchronized = true
                                };

                            command.Count += (ulong)allStats.Commands.ExtractFiles;
                            ctx.Commands.Update(command);
                        }

                        if(allStats.Commands.Formats > 0)
                        {
                            Command command = ctx.Commands.FirstOrDefault(c => c.Name == "formats" && c.Synchronized) ??
                                              new Command
                                              {
                                                  Name = "formats", Synchronized = true
                                              };

                            command.Count += (ulong)allStats.Commands.Formats;
                            ctx.Commands.Update(command);
                        }

                        if(allStats.Commands.ImageInfo > 0)
                        {
                            Command command =
                                ctx.Commands.FirstOrDefault(c => c.Name == "image-info" && c.Synchronized) ??
                                new Command
                                {
                                    Name = "image-info", Synchronized = true
                                };

                            command.Count += (ulong)allStats.Commands.ImageInfo;
                            ctx.Commands.Update(command);
                        }

                        if(allStats.Commands.ListDevices > 0)
                        {
                            Command command =
                                ctx.Commands.FirstOrDefault(c => c.Name == "list-devices" && c.Synchronized) ??
                                new Command
                                {
                                    Name = "list-devices", Synchronized = true
                                };

                            command.Count += (ulong)allStats.Commands.ListDevices;
                            ctx.Commands.Update(command);
                        }

                        if(allStats.Commands.ListEncodings > 0)
                        {
                            Command command =
                                ctx.Commands.FirstOrDefault(c => c.Name == "list-encodings" && c.Synchronized) ??
                                new Command
                                {
                                    Name = "list-encodings", Synchronized = true
                                };

                            command.Count += (ulong)allStats.Commands.ListEncodings;
                            ctx.Commands.Update(command);
                        }

                        if(allStats.Commands.Ls > 0)
                        {
                            Command command = ctx.Commands.FirstOrDefault(c => c.Name == "ls" && c.Synchronized) ??
                                              new Command
                                              {
                                                  Name = "ls", Synchronized = true
                                              };

                            command.Count += (ulong)allStats.Commands.Ls;
                            ctx.Commands.Update(command);
                        }

                        if(allStats.Commands.MediaInfo > 0)
                        {
                            Command command =
                                ctx.Commands.FirstOrDefault(c => c.Name == "media-info" && c.Synchronized) ??
                                new Command
                                {
                                    Name = "media-info", Synchronized = true
                                };

                            command.Count += (ulong)allStats.Commands.MediaInfo;
                            ctx.Commands.Update(command);
                        }

                        if(allStats.Commands.MediaScan > 0)
                        {
                            Command command =
                                ctx.Commands.FirstOrDefault(c => c.Name == "media-scan" && c.Synchronized) ??
                                new Command
                                {
                                    Name = "media-scan", Synchronized = true
                                };

                            command.Count += (ulong)allStats.Commands.MediaScan;
                            ctx.Commands.Update(command);
                        }

                        if(allStats.Commands.PrintHex > 0)
                        {
                            Command command =
                                ctx.Commands.FirstOrDefault(c => c.Name == "printhex" && c.Synchronized) ?? new Command
                                {
                                    Name = "printhex", Synchronized = true
                                };

                            command.Count += (ulong)allStats.Commands.PrintHex;
                            ctx.Commands.Update(command);
                        }

                        if(allStats.Commands.Verify > 0)
                        {
                            Command command = ctx.Commands.FirstOrDefault(c => c.Name == "verify" && c.Synchronized) ??
                                              new Command
                                              {
                                                  Name = "verify", Synchronized = true
                                              };

                            command.Count += (ulong)allStats.Commands.Verify;
                            ctx.Commands.Update(command);
                        }
                    }

                    if(allStats.OperatingSystems != null)
                        foreach(OsStats operatingSystem in allStats.OperatingSystems)
                        {
                            if(string.IsNullOrWhiteSpace(operatingSystem.name) ||
                               string.IsNullOrWhiteSpace(operatingSystem.version))
                                continue;

                            OperatingSystem existing =
                                ctx.OperatingSystems.FirstOrDefault(c => c.Name    == operatingSystem.name    &&
                                                                         c.Version == operatingSystem.version &&
                                                                         c.Synchronized) ?? new OperatingSystem
                                {
                                    Name = operatingSystem.name, Version = operatingSystem.version, Synchronized = true
                                };

                            existing.Count += (ulong)operatingSystem.Value;
                            ctx.OperatingSystems.Update(existing);
                        }

                    if(allStats.Versions != null)
                        foreach(NameValueStats nvs in allStats.Versions)
                        {
                            if(string.IsNullOrWhiteSpace(nvs.name))
                                continue;

                            Version existing = ctx.Versions.FirstOrDefault(c => c.Name == nvs.name && c.Synchronized) ??
                                               new Version
                                               {
                                                   Name = nvs.name, Synchronized = true
                                               };

                            existing.Count += (ulong)nvs.Value;
                            ctx.Versions.Update(existing);
                        }

                    if(allStats.Filesystems != null)
                        foreach(NameValueStats nvs in allStats.Filesystems)
                        {
                            if(string.IsNullOrWhiteSpace(nvs.name))
                                continue;

                            Filesystem existing =
                                ctx.Filesystems.FirstOrDefault(c => c.Name == nvs.name && c.Synchronized) ??
                                new Filesystem
                                {
                                    Name = nvs.name, Synchronized = true
                                };

                            existing.Count += (ulong)nvs.Value;
                            ctx.Filesystems.Update(existing);
                        }

                    if(allStats.Partitions != null)
                        foreach(NameValueStats nvs in allStats.Partitions)
                        {
                            if(string.IsNullOrWhiteSpace(nvs.name))
                                continue;

                            Partition existing =
                                ctx.Partitions.FirstOrDefault(c => c.Name == nvs.name && c.Synchronized) ??
                                new Partition
                                {
                                    Name = nvs.name, Synchronized = true
                                };

                            existing.Count += (ulong)nvs.Value;
                            ctx.Partitions.Update(existing);
                        }

                    if(allStats.Filesystems != null)
                        foreach(NameValueStats nvs in allStats.Filesystems)
                        {
                            if(string.IsNullOrWhiteSpace(nvs.name))
                                continue;

                            Filesystem existing =
                                ctx.Filesystems.FirstOrDefault(c => c.Name == nvs.name && c.Synchronized) ??
                                new Filesystem
                                {
                                    Name = nvs.name, Synchronized = true
                                };

                            existing.Count += (ulong)nvs.Value;
                            ctx.Filesystems.Update(existing);
                        }

                    if(allStats.MediaImages != null)
                        foreach(NameValueStats nvs in allStats.MediaImages)
                        {
                            if(string.IsNullOrWhiteSpace(nvs.name))
                                continue;

                            MediaFormat existing =
                                ctx.MediaFormats.FirstOrDefault(c => c.Name == nvs.name && c.Synchronized) ??
                                new MediaFormat
                                {
                                    Name = nvs.name, Synchronized = true
                                };

                            existing.Count += (ulong)nvs.Value;
                            ctx.MediaFormats.Update(existing);
                        }

                    if(allStats.Filters != null)
                        foreach(NameValueStats nvs in allStats.Filters)
                        {
                            if(string.IsNullOrWhiteSpace(nvs.name))
                                continue;

                            Filter existing = ctx.Filters.FirstOrDefault(c => c.Name == nvs.name && c.Synchronized) ??
                                              new Filter
                                              {
                                                  Name = nvs.name, Synchronized = true
                                              };

                            existing.Count += (ulong)nvs.Value;
                            ctx.Filters.Update(existing);
                        }

                    if(allStats.Devices != null)
                        foreach(DeviceStats device in allStats.Devices)
                        {
                            if(ctx.SeenDevices.Any(d => d.Manufacturer == device.Manufacturer &&
                                                        d.Model        == device.Model        &&
                                                        d.Revision     == device.Revision     &&
                                                        d.Bus          == device.Bus))
                                continue;

                            ctx.SeenDevices.Add(new DeviceStat
                            {
                                Bus      = device.Bus, Manufacturer      = device.Manufacturer, Model = device.Model,
                                Revision = device.Revision, Synchronized = true
                            });
                        }

                    if(allStats.Medias != null)
                        foreach(MediaStats media in allStats.Medias)
                        {
                            if(string.IsNullOrWhiteSpace(media.type))
                                continue;

                            Database.Models.Media existing =
                                ctx.Medias.FirstOrDefault(c => c.Type == media.type && c.Real == media.real &&
                                                               c.Synchronized) ?? new Database.Models.Media
                                {
                                    Type = media.type, Real = media.real, Synchronized = true
                                };

                            existing.Count += (ulong)media.Value;
                            ctx.Medias.Update(existing);
                        }

                    ctx.SaveChanges();
                    File.Delete(Path.Combine(Settings.Settings.StatsPath, "Statistics.xml"));
                }
                catch
                {
                    // Do not care about it
                }

            if(Settings.Settings.Current.Stats == null)
                return;

            ctx.OperatingSystems.Add(new OperatingSystem
            {
                Name  = DetectOS.GetRealPlatformID().ToString(), Synchronized = false, Version = DetectOS.GetVersion(),
                Count = 1
            });

            ctx.Versions.Add(new Version
            {
                Name = CommonTypes.Interop.Version.GetVersion(), Synchronized = false, Count = 1
            });

            ctx.SaveChanges();
        }

        /// <summary>Saves statistics to disk</summary>
        public static void SaveStats()
        {
            var ctx = DicContext.Create(Settings.Settings.LocalDbPath);
            ctx.SaveChanges();

            if(Settings.Settings.Current.Stats != null &&
               Settings.Settings.Current.Stats.ShareStats)
                SubmitStats();
        }

        /// <summary>Submits statistics to DiscImageChef.Server</summary>
        public static void SubmitStats()
        {
            var submitThread = new Thread(() =>
            {
                var ctx = DicContext.Create(Settings.Settings.LocalDbPath);

                try
                {
                    if(submitStatsLock)
                        return;

                    submitStatsLock = true;

                    if(ctx.Commands.Any(c => !c.Synchronized)            ||
                       ctx.Filesystems.Any(c => !c.Synchronized)         ||
                       ctx.Filters.Any(c => !c.Synchronized)             ||
                       ctx.MediaFormats.Any(c => !c.Synchronized)        ||
                       ctx.Partitions.Any(c => !c.Synchronized)          ||
                       ctx.Medias.Any(c => !c.Synchronized)              ||
                       ctx.SeenDevices.Any(c => !c.Synchronized)         ||
                       ctx.OperatingSystems.Any(c => !c.Synchronized)    ||
                       ctx.Versions.Any(c => !c.Synchronized)            ||
                       ctx.RemoteApplications.Any(c => !c.Synchronized)  ||
                       ctx.RemoteArchitectures.Any(c => !c.Synchronized) ||
                       ctx.RemoteOperatingSystems.Any(c => !c.Synchronized))
                    {
                        var dto = new StatsDto();

                        if(ctx.Commands.Any(c => !c.Synchronized))
                        {
                            dto.Commands = new List<NameValueStats>();

                            foreach(string nvs in ctx.Commands.Where(c => !c.Synchronized).Select(c => c.Name).
                                                      Distinct())
                                dto.Commands.Add(new NameValueStats
                                {
                                    name = nvs, Value = ctx.Commands.LongCount(c => !c.Synchronized && c.Name == nvs)
                                });
                        }

                        if(ctx.Filesystems.Any(c => !c.Synchronized))
                        {
                            dto.Filesystems = new List<NameValueStats>();

                            foreach(string nvs in ctx.Filesystems.Where(c => !c.Synchronized).Select(c => c.Name).
                                                      Distinct())
                                dto.Filesystems.Add(new NameValueStats
                                {
                                    name = nvs, Value = ctx.Filesystems.LongCount(c => !c.Synchronized && c.Name == nvs)
                                });
                        }

                        if(ctx.Filters.Any(c => !c.Synchronized))
                        {
                            dto.Filters = new List<NameValueStats>();

                            foreach(string nvs in ctx.Filters.Where(c => !c.Synchronized).Select(c => c.Name).Distinct()
                            )
                                dto.Filters.Add(new NameValueStats
                                {
                                    name = nvs, Value = ctx.Filters.LongCount(c => !c.Synchronized && c.Name == nvs)
                                });
                        }

                        if(ctx.MediaFormats.Any(c => !c.Synchronized))
                        {
                            dto.MediaFormats = new List<NameValueStats>();

                            foreach(string nvs in ctx.Commands.Where(c => !c.Synchronized).Select(c => c.Name).
                                                      Distinct())
                                dto.MediaFormats.Add(new NameValueStats
                                {
                                    name  = nvs,
                                    Value = ctx.MediaFormats.LongCount(c => !c.Synchronized && c.Name == nvs)
                                });
                        }

                        if(ctx.Partitions.Any(c => !c.Synchronized))
                        {
                            dto.Partitions = new List<NameValueStats>();

                            foreach(string nvs in ctx.Partitions.Where(c => !c.Synchronized).Select(c => c.Name).
                                                      Distinct())
                                dto.Partitions.Add(new NameValueStats
                                {
                                    name = nvs, Value = ctx.Partitions.LongCount(c => !c.Synchronized && c.Name == nvs)
                                });
                        }

                        if(ctx.Versions.Any(c => !c.Synchronized))
                        {
                            dto.Versions = new List<NameValueStats>();

                            foreach(string nvs in ctx.Versions.Where(c => !c.Synchronized).Select(c => c.Name).
                                                      Distinct())
                                dto.Versions.Add(new NameValueStats
                                {
                                    name = nvs, Value = ctx.Versions.LongCount(c => !c.Synchronized && c.Name == nvs)
                                });
                        }

                        if(ctx.Medias.Any(c => !c.Synchronized))
                        {
                            dto.Medias = new List<MediaStats>();

                            foreach(string media in ctx.Medias.Where(c => !c.Synchronized).Select(c => c.Type).
                                                        Distinct())
                            {
                                if(ctx.Medias.Any(c => !c.Synchronized && c.Type == media && c.Real))
                                    dto.Medias.Add(new MediaStats
                                    {
                                        real  = true, type = media,
                                        Value = ctx.Medias.LongCount(c => !c.Synchronized && c.Type == media && c.Real)
                                    });

                                if(ctx.Medias.Any(c => !c.Synchronized && c.Type == media && !c.Real))
                                    dto.Medias.Add(new MediaStats
                                    {
                                        real  = false, type = media,
                                        Value = ctx.Medias.LongCount(c => !c.Synchronized && c.Type == media && !c.Real)
                                    });
                            }
                        }

                        if(ctx.SeenDevices.Any(c => !c.Synchronized))
                        {
                            dto.Devices = new List<DeviceStats>();

                            foreach(DeviceStat device in ctx.SeenDevices.Where(c => !c.Synchronized))
                                dto.Devices.Add(new DeviceStats
                                {
                                    Bus                   = device.Bus, Manufacturer              = device.Manufacturer,
                                    ManufacturerSpecified = !(device.Manufacturer is null), Model = device.Model,
                                    Revision              = device.Revision
                                });
                        }

                        if(ctx.OperatingSystems.Any(c => !c.Synchronized))
                        {
                            dto.OperatingSystems = new List<OsStats>();

                            foreach(string osName in ctx.
                                                     OperatingSystems.Where(c => !c.Synchronized).Select(c => c.Name).
                                                     Distinct())
                            {
                                foreach(string osVersion in ctx.
                                                            OperatingSystems.
                                                            Where(c => !c.Synchronized && c.Name == osName).
                                                            Select(c => c.Version).Distinct())
                                    dto.OperatingSystems.Add(new OsStats
                                    {
                                        name = osName, version = osVersion,
                                        Value = ctx.OperatingSystems.LongCount(c => !c.Synchronized     &&
                                                                                    c.Name    == osName &&
                                                                                    c.Version == osVersion)
                                    });
                            }
                        }

                        if(ctx.RemoteApplications.Any(c => !c.Synchronized))
                        {
                            dto.RemoteApplications = new List<OsStats>();

                            foreach(string remoteAppName in ctx.
                                                            RemoteApplications.Where(c => !c.Synchronized).
                                                            Select(c => c.Name).Distinct())
                            {
                                foreach(string remoteAppVersion in ctx.
                                                                   RemoteApplications.
                                                                   Where(c => !c.Synchronized &&
                                                                              c.Name == remoteAppName).
                                                                   Select(c => c.Version).Distinct())
                                    dto.RemoteApplications.Add(new OsStats
                                    {
                                        name = remoteAppName, version = remoteAppVersion,
                                        Value = ctx.RemoteApplications.LongCount(c => !c.Synchronized            &&
                                                                                      c.Name    == remoteAppName &&
                                                                                      c.Version == remoteAppVersion)
                                    });
                            }
                        }

                        if(ctx.RemoteArchitectures.Any(c => !c.Synchronized))
                        {
                            dto.RemoteArchitectures = new List<NameValueStats>();

                            foreach(string nvs in ctx.RemoteArchitectures.Where(c => !c.Synchronized).
                                                      Select(c => c.Name).Distinct())
                                dto.RemoteArchitectures.Add(new NameValueStats
                                {
                                    name  = nvs,
                                    Value = ctx.RemoteArchitectures.LongCount(c => !c.Synchronized && c.Name == nvs)
                                });
                        }

                        if(ctx.RemoteOperatingSystems.Any(c => !c.Synchronized))
                        {
                            dto.RemoteOperatingSystems = new List<OsStats>();

                            foreach(string remoteOsName in ctx.
                                                           RemoteOperatingSystems.Where(c => !c.Synchronized).
                                                           Select(c => c.Name).Distinct())
                            {
                                foreach(string remoteOsVersion in ctx.
                                                                  RemoteOperatingSystems.
                                                                  Where(c => !c.Synchronized && c.Name == remoteOsName).
                                                                  Select(c => c.Version).Distinct())
                                    dto.RemoteOperatingSystems.Add(new OsStats
                                    {
                                        name = remoteOsName, version = remoteOsVersion,
                                        Value = ctx.RemoteOperatingSystems.LongCount(c => !c.Synchronized           &&
                                                                                          c.Name    == remoteOsName &&
                                                                                          c.Version == remoteOsVersion)
                                    });
                            }
                        }

                    #if DEBUG
                        System.Console.WriteLine("Uploading statistics");
                    #else
                            DiscImageChef.Console.DicConsole.DebugWriteLine("Submit stats", "Uploading statistics");
                    #endif

                        string json = JsonConvert.SerializeObject(dto, Formatting.Indented, new JsonSerializerSettings
                        {
                            NullValueHandling = NullValueHandling.Ignore
                        });

                        byte[] jsonBytes = Encoding.UTF8.GetBytes(json);
                        var    request   = WebRequest.Create("https://www.discimagechef.app/api/uploadstatsv2");

                        ((HttpWebRequest)request).UserAgent =
                            $"DiscImageChef {typeof(Version).Assembly.GetName().Version}";

                        request.Method        = "POST";
                        request.ContentLength = jsonBytes.Length;
                        request.ContentType   = "application/json";
                        Stream reqStream = request.GetRequestStream();
                        reqStream.Write(jsonBytes, 0, jsonBytes.Length);

                        //jsonStream.CopyTo(reqStream);
                        reqStream.Close();
                        WebResponse response = request.GetResponse();

                        if(((HttpWebResponse)response).StatusCode != HttpStatusCode.OK)
                            return;

                        Stream data   = response.GetResponseStream();
                        var    reader = new StreamReader(data ?? throw new InvalidOperationException());

                        string result = reader.ReadToEnd();
                        data.Close();
                        response.Close();

                        if(result != "ok")
                            return;

                        if(ctx.Commands.Any(c => !c.Synchronized))
                            foreach(string nvs in ctx.Commands.Where(c => !c.Synchronized).Select(c => c.Name).
                                                      Distinct())
                            {
                                Command existing = ctx.Commands.FirstOrDefault(c => c.Synchronized && c.Name == nvs) ??
                                                   new Command
                                                   {
                                                       Name = nvs, Synchronized = true
                                                   };

                                existing.Count += (ulong)ctx.Commands.LongCount(c => !c.Synchronized && c.Name == nvs);
                                ctx.Commands.Update(existing);
                                ctx.Commands.RemoveRange(ctx.Commands.Where(c => !c.Synchronized && c.Name == nvs));
                            }

                        if(ctx.Filesystems.Any(c => !c.Synchronized))
                            foreach(string nvs in ctx.Filesystems.Where(c => !c.Synchronized).Select(c => c.Name).
                                                      Distinct())
                            {
                                Filesystem existing =
                                    ctx.Filesystems.FirstOrDefault(c => c.Synchronized && c.Name == nvs) ??
                                    new Filesystem
                                    {
                                        Name = nvs, Synchronized = true
                                    };

                                existing.Count +=
                                    (ulong)ctx.Filesystems.LongCount(c => !c.Synchronized && c.Name == nvs);

                                ctx.Filesystems.Update(existing);

                                ctx.Filesystems.RemoveRange(ctx.Filesystems.Where(c => !c.Synchronized &&
                                                                                       c.Name == nvs));
                            }

                        if(ctx.Filters.Any(c => !c.Synchronized))
                            foreach(string nvs in ctx.Filters.Where(c => !c.Synchronized).Select(c => c.Name).Distinct()
                            )
                            {
                                Filter existing = ctx.Filters.FirstOrDefault(c => c.Synchronized && c.Name == nvs) ??
                                                  new Filter
                                                  {
                                                      Name = nvs, Synchronized = true
                                                  };

                                existing.Count += (ulong)ctx.Filters.LongCount(c => !c.Synchronized && c.Name == nvs);
                                ctx.Filters.Update(existing);
                                ctx.Filters.RemoveRange(ctx.Filters.Where(c => !c.Synchronized && c.Name == nvs));
                            }

                        if(ctx.MediaFormats.Any(c => !c.Synchronized))
                            foreach(string nvs in ctx.MediaFormats.Where(c => !c.Synchronized).Select(c => c.Name).
                                                      Distinct())
                            {
                                MediaFormat existing =
                                    ctx.MediaFormats.FirstOrDefault(c => c.Synchronized && c.Name == nvs) ??
                                    new MediaFormat
                                    {
                                        Name = nvs, Synchronized = true
                                    };

                                existing.Count +=
                                    (ulong)ctx.MediaFormats.LongCount(c => !c.Synchronized && c.Name == nvs);

                                ctx.MediaFormats.Update(existing);

                                ctx.MediaFormats.RemoveRange(ctx.MediaFormats.Where(c => !c.Synchronized &&
                                                                                         c.Name == nvs));
                            }

                        if(ctx.Partitions.Any(c => !c.Synchronized))
                            foreach(string nvs in ctx.Partitions.Where(c => !c.Synchronized).Select(c => c.Name).
                                                      Distinct())
                            {
                                Partition existing =
                                    ctx.Partitions.FirstOrDefault(c => c.Synchronized && c.Name == nvs) ?? new Partition
                                    {
                                        Name = nvs, Synchronized = true
                                    };

                                existing.Count +=
                                    (ulong)ctx.Partitions.LongCount(c => !c.Synchronized && c.Name == nvs);

                                ctx.Partitions.Update(existing);
                                ctx.Partitions.RemoveRange(ctx.Partitions.Where(c => !c.Synchronized && c.Name == nvs));
                            }

                        if(ctx.Versions.Any(c => !c.Synchronized))
                            foreach(string nvs in ctx.Versions.Where(c => !c.Synchronized).Select(c => c.Name).
                                                      Distinct())
                            {
                                Version existing = ctx.Versions.FirstOrDefault(c => c.Synchronized && c.Name == nvs) ??
                                                   new Version
                                                   {
                                                       Name = nvs, Synchronized = true
                                                   };

                                existing.Count += (ulong)ctx.Versions.LongCount(c => !c.Synchronized && c.Name == nvs);
                                ctx.Versions.Update(existing);
                                ctx.Versions.RemoveRange(ctx.Versions.Where(c => !c.Synchronized && c.Name == nvs));
                            }

                        if(ctx.Medias.Any(c => !c.Synchronized))
                            foreach(string media in ctx.Medias.Where(c => !c.Synchronized).Select(c => c.Type).
                                                        Distinct())
                            {
                                if(ctx.Medias.Any(c => !c.Synchronized && c.Type == media && c.Real))
                                {
                                    Database.Models.Media existing =
                                        ctx.Medias.FirstOrDefault(c => c.Synchronized && c.Type == media && c.Real) ??
                                        new Database.Models.Media
                                        {
                                            Synchronized = true, Type = media, Real = true
                                        };

                                    existing.Count +=
                                        (ulong)ctx.Medias.LongCount(c => !c.Synchronized && c.Type == media && c.Real);

                                    ctx.Medias.Update(existing);

                                    ctx.Medias.RemoveRange(ctx.Medias.Where(c => !c.Synchronized && c.Type == media &&
                                                                                 c.Real));
                                }

                                if(!ctx.Medias.Any(c => !c.Synchronized && c.Type == media && !c.Real))
                                    continue;

                                {
                                    Database.Models.Media existing =
                                        ctx.Medias.FirstOrDefault(c => c.Synchronized && c.Type == media && !c.Real) ??
                                        new Database.Models.Media
                                        {
                                            Synchronized = true, Type = media, Real = false
                                        };

                                    existing.Count +=
                                        (ulong)ctx.Medias.LongCount(c => !c.Synchronized && c.Type == media && !c.Real);

                                    ctx.Medias.Update(existing);

                                    ctx.Medias.RemoveRange(ctx.Medias.Where(c => !c.Synchronized && c.Type == media &&
                                                                                 !c.Real));
                                }
                            }

                        if(ctx.SeenDevices.Any(c => !c.Synchronized))
                            foreach(DeviceStat device in ctx.SeenDevices.Where(c => !c.Synchronized))
                            {
                                device.Synchronized = true;
                                ctx.Update(device);
                            }

                        if(ctx.OperatingSystems.Any(c => !c.Synchronized))
                            foreach(string osName in ctx.
                                                     OperatingSystems.Where(c => !c.Synchronized).Select(c => c.Name).
                                                     Distinct())
                            {
                                foreach(string osVersion in ctx.
                                                            OperatingSystems.
                                                            Where(c => !c.Synchronized && c.Name == osName).
                                                            Select(c => c.Version).Distinct())
                                {
                                    OperatingSystem existing =
                                        ctx.OperatingSystems.FirstOrDefault(c => c.Synchronized && c.Name == osName &&
                                                                                 c.Version ==
                                                                                 osVersion) ??
                                        new OperatingSystem
                                        {
                                            Synchronized = true, Version = osVersion, Name = osName
                                        };

                                    existing.Count +=
                                        (ulong)ctx.OperatingSystems.LongCount(c => !c.Synchronized     &&
                                                                                   c.Name    == osName &&
                                                                                   c.Version == osVersion);

                                    ctx.OperatingSystems.Update(existing);

                                    ctx.OperatingSystems.RemoveRange(ctx.OperatingSystems.Where(c => !c.Synchronized  &&
                                                                                                     c.Name == osName &&
                                                                                                     c.Version ==
                                                                                                     osVersion));
                                }
                            }

                        if(ctx.RemoteApplications.Any(c => !c.Synchronized))
                            foreach(string remoteAppName in ctx.
                                                            RemoteApplications.Where(c => !c.Synchronized).
                                                            Select(c => c.Name).Distinct())
                            {
                                foreach(string remoteAppVersion in ctx.
                                                                   RemoteApplications.
                                                                   Where(c => !c.Synchronized &&
                                                                              c.Name == remoteAppName).
                                                                   Select(c => c.Version).Distinct())
                                {
                                    RemoteApplication existing =
                                        ctx.RemoteApplications.FirstOrDefault(c => c.Synchronized             &&
                                                                                   c.Name    == remoteAppName &&
                                                                                   c.Version == remoteAppVersion) ??
                                        new RemoteApplication
                                        {
                                            Synchronized = true, Version = remoteAppVersion, Name = remoteAppName
                                        };

                                    existing.Count +=
                                        (ulong)ctx.RemoteApplications.LongCount(c => !c.Synchronized            &&
                                                                                     c.Name    == remoteAppName &&
                                                                                     c.Version == remoteAppVersion);

                                    ctx.RemoteApplications.Update(existing);

                                    ctx.RemoteApplications.RemoveRange(ctx.RemoteApplications.Where(c =>
                                                                                                        !c.
                                                                                                            Synchronized &&
                                                                                                        c.Name ==
                                                                                                        remoteAppName &&
                                                                                                        c.Version ==
                                                                                                        remoteAppVersion));
                                }
                            }

                        if(ctx.RemoteArchitectures.Any(c => !c.Synchronized))
                            foreach(string nvs in ctx.RemoteArchitectures.Where(c => !c.Synchronized).
                                                      Select(c => c.Name).Distinct())
                            {
                                RemoteArchitecture existing =
                                    ctx.RemoteArchitectures.FirstOrDefault(c => c.Synchronized && c.Name == nvs) ??
                                    new RemoteArchitecture
                                    {
                                        Name = nvs, Synchronized = true
                                    };

                                existing.Count +=
                                    (ulong)ctx.RemoteArchitectures.LongCount(c => !c.Synchronized && c.Name == nvs);

                                ctx.RemoteArchitectures.Update(existing);

                                ctx.RemoteArchitectures.RemoveRange(ctx.RemoteArchitectures.
                                                                        Where(c => !c.Synchronized && c.Name == nvs));
                            }

                        foreach(string remoteOsName in ctx.
                                                       RemoteOperatingSystems.Where(c => !c.Synchronized).
                                                       Select(c => c.Name).Distinct())
                        {
                            foreach(string remoteOsVersion in ctx.
                                                              RemoteOperatingSystems.
                                                              Where(c => !c.Synchronized && c.Name == remoteOsName).
                                                              Select(c => c.Version).Distinct())
                            {
                                RemoteOperatingSystem existing =
                                    ctx.RemoteOperatingSystems.FirstOrDefault(c => c.Synchronized            &&
                                                                                   c.Name    == remoteOsName &&
                                                                                   c.Version == remoteOsVersion) ??
                                    new RemoteOperatingSystem
                                    {
                                        Synchronized = true, Version = remoteOsVersion, Name = remoteOsName
                                    };

                                existing.Count +=
                                    (ulong)ctx.RemoteOperatingSystems.LongCount(c => !c.Synchronized           &&
                                                                                     c.Name    == remoteOsName &&
                                                                                     c.Version == remoteOsVersion);

                                ctx.RemoteOperatingSystems.Update(existing);

                                ctx.RemoteOperatingSystems.RemoveRange(ctx.RemoteOperatingSystems.Where(c =>
                                                                                                            !c.
                                                                                                                Synchronized &&
                                                                                                            c.Name ==
                                                                                                            remoteOsName &&
                                                                                                            c.Version ==
                                                                                                            remoteOsVersion));
                            }
                        }

                        ctx.SaveChanges();
                    }
                }
                catch(WebException)
                {
                    // Can't connect to the server, do nothing
                }
                catch(DbUpdateConcurrencyException)
                {
                    // Ignore db concurrency errors
                }

                // ReSharper disable once RedundantCatchClause
                catch
                {
                #if DEBUG
                    submitStatsLock = false;

                    if(Debugger.IsAttached)
                        throw;
                #endif
                }

                IEnumerable<string> statsFiles =
                    Directory.EnumerateFiles(Settings.Settings.StatsPath, "PartialStats_*.xml",
                                             SearchOption.TopDirectoryOnly);

                foreach(string statsFile in statsFiles)
                    try
                    {
                        if(!File.Exists(statsFile))
                            continue;

                        var stats = new Stats();

                        // This can execute before debug console has been inited
                    #if DEBUG
                        System.Console.WriteLine("Uploading partial statistics file {0}", statsFile);
                    #else
                    DiscImageChef.Console.DicConsole.DebugWriteLine("Submit stats", "Uploading partial statistics file {0}", statsFile);
                    #endif

                        var fs = new FileStream(statsFile, FileMode.Open, FileAccess.Read);
                        var xs = new XmlSerializer(stats.GetType());
                        xs.Deserialize(fs); // Just to test validity of stats file
                        fs.Seek(0, SeekOrigin.Begin);

                        var request = WebRequest.Create("https://www.discimagechef.app/api/uploadstats");

                        ((HttpWebRequest)request).UserAgent =
                            $"DiscImageChef {typeof(CommonTypes.Interop.Version).Assembly.GetName().Version}";

                        request.Method        = "POST";
                        request.ContentLength = fs.Length;
                        request.ContentType   = "application/xml";
                        Stream reqStream = request.GetRequestStream();
                        fs.CopyTo(reqStream);
                        reqStream.Close();
                        WebResponse response = request.GetResponse();

                        if(((HttpWebResponse)response).StatusCode != HttpStatusCode.OK)
                            return;

                        Stream data   = response.GetResponseStream();
                        var    reader = new StreamReader(data ?? throw new InvalidOperationException());

                        string responseFromServer = reader.ReadToEnd();
                        data.Close();
                        response.Close();
                        fs.Close();

                        if(responseFromServer == "ok")
                            File.Delete(statsFile);
                    }
                    catch(WebException)
                    {
                        // Can't connect to the server, postpone til next try
                        break;
                    }
                    catch
                    {
                    #if DEBUG
                        if(!Debugger.IsAttached)
                            continue;

                        submitStatsLock = false;

                        throw;
                    #endif
                    }

                submitStatsLock = false;
            });

            submitThread.Start();
        }

        /// <summary>Adds the execution of a command to statistics</summary>
        /// <param name="command">Command</param>
        public static void AddCommand(string command)
        {
            if(string.IsNullOrWhiteSpace(command))
                return;

            if(Settings.Settings.Current.Stats == null ||
               !Settings.Settings.Current.Stats.DeviceStats)
                return;

            var ctx = DicContext.Create(Settings.Settings.LocalDbPath);

            ctx.Commands.Add(new Command
            {
                Name = command, Synchronized = false, Count = 1
            });

            ctx.SaveChanges();
        }

        /// <summary>Adds a new filesystem to statistics</summary>
        /// <param name="filesystem">Filesystem name</param>
        public static void AddFilesystem(string filesystem)
        {
            if(string.IsNullOrWhiteSpace(filesystem))
                return;

            if(Settings.Settings.Current.Stats == null ||
               !Settings.Settings.Current.Stats.FilesystemStats)
                return;

            var ctx = DicContext.Create(Settings.Settings.LocalDbPath);

            ctx.Filesystems.Add(new Filesystem
            {
                Name = filesystem, Synchronized = false, Count = 1
            });

            ctx.SaveChanges();
        }

        /// <summary>Adds a new partition scheme to statistics</summary>
        /// <param name="partition">Partition scheme name</param>
        internal static void AddPartition(string partition)
        {
            if(string.IsNullOrWhiteSpace(partition))
                return;

            if(Settings.Settings.Current.Stats == null ||
               !Settings.Settings.Current.Stats.PartitionStats)
                return;

            var ctx = DicContext.Create(Settings.Settings.LocalDbPath);

            ctx.Partitions.Add(new Partition
            {
                Name = partition, Synchronized = false, Count = 1
            });

            ctx.SaveChanges();
        }

        /// <summary>Adds a new filter to statistics</summary>
        /// <param name="filter">Filter name</param>
        public static void AddFilter(string filter)
        {
            if(string.IsNullOrWhiteSpace(filter))
                return;

            if(Settings.Settings.Current.Stats == null ||
               !Settings.Settings.Current.Stats.FilterStats)
                return;

            var ctx = DicContext.Create(Settings.Settings.LocalDbPath);

            ctx.Filters.Add(new Filter
            {
                Name = filter, Synchronized = false, Count = 1
            });

            ctx.SaveChanges();
        }

        /// <summary>Ads a new media image to statistics</summary>
        /// <param name="format">Media image name</param>
        public static void AddMediaFormat(string format)
        {
            if(string.IsNullOrWhiteSpace(format))
                return;

            if(Settings.Settings.Current.Stats == null ||
               !Settings.Settings.Current.Stats.MediaImageStats)
                return;

            var ctx = DicContext.Create(Settings.Settings.LocalDbPath);

            ctx.MediaFormats.Add(new MediaFormat
            {
                Name = format, Synchronized = false, Count = 1
            });

            ctx.SaveChanges();
        }

        /// <summary>Adds a new device to statistics</summary>
        /// <param name="dev">Device</param>
        public static void AddDevice(Device dev)
        {
            if(Settings.Settings.Current.Stats == null ||
               !Settings.Settings.Current.Stats.DeviceStats)
                return;

            string deviceBus;

            if(dev.IsUsb)
                deviceBus = "USB";
            else if(dev.IsFireWire)
                deviceBus = "FireWire";
            else
                deviceBus = dev.Type.ToString();

            var ctx = DicContext.Create(Settings.Settings.LocalDbPath);

            ctx.SeenDevices.Add(new DeviceStat
            {
                Bus          = deviceBus, Manufacturer = dev.Manufacturer, Model = dev.Model, Revision = dev.Revision,
                Synchronized = false
            });

            ctx.SaveChanges();
        }

        /// <summary>Adds a new media type to statistics</summary>
        /// <param name="type">Media type</param>
        /// <param name="real">Set if media was found on a real device, otherwise found on a media image</param>
        public static void AddMedia(MediaType type, bool real)
        {
            if(Settings.Settings.Current.Stats == null ||
               !Settings.Settings.Current.Stats.MediaStats)
                return;

            var ctx = DicContext.Create(Settings.Settings.LocalDbPath);

            ctx.Medias.Add(new Database.Models.Media
            {
                Real = real, Synchronized = false, Type = type.ToString(), Count = 1
            });

            ctx.SaveChanges();
        }

        /// <summary>Adds a new remote to statistics</summary>
        public static void AddRemote(string serverApplication, string serverVersion, string serverOperatingSystem,
                                     string serverOperatingSystemVersion, string serverArchitecture)
        {
            if(Settings.Settings.Current.Stats == null ||
               !Settings.Settings.Current.Stats.MediaStats)
                return;

            var ctx = DicContext.Create(Settings.Settings.LocalDbPath);

            ctx.RemoteApplications.Add(new RemoteApplication
            {
                Count = 1, Name = serverApplication, Synchronized = false, Version = serverVersion
            });

            ctx.RemoteArchitectures.Add(new RemoteArchitecture
            {
                Count = 1, Name = serverArchitecture, Synchronized = false
            });

            ctx.RemoteOperatingSystems.Add(new RemoteOperatingSystem
            {
                Count = 1, Name = serverOperatingSystem, Synchronized = false, Version = serverOperatingSystemVersion
            });

            ctx.SaveChanges();
        }
    }
}