using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Drawing;
using System.IO;
using System.Linq;
using System.Management;
using System.Text;
using System.Threading.Tasks;
using System.Windows;
using Tango.BL.Entities;
using Tango.BL.Enumerations;
using Tango.Core;
using Tango.Core.DI;
using Tango.Core.ExtensionMethods;
using Tango.Core.Helpers;
using Tango.FSE.BL;
using Tango.FSE.Common;
using Tango.FSE.Common.Authentication;
using Tango.FSE.Common.BugReporting;
using Tango.FSE.Common.Connection;
using Tango.FSE.Common.Connectivity;
using Tango.FSE.Common.FSEApplication;
using Tango.FSE.Common.Helpers;
using Tango.FSE.Common.Logging;
using Tango.FSE.Common.Notifications;
using Tango.FSE.Common.RemoteDesktop;
using Tango.FSE.UI.Dialogs;
using Tango.FSE.Web.Messages;
using Tango.Integration.ExternalBridge;
using Tango.Integration.Operation;
using Tango.Logging;
using Tango.RemoteDesktop;
using Tango.RemoteDesktop.CaptureMethods;
using Tango.RemoteDesktop.Encoders;
using Tango.TFS;

namespace Tango.FSE.UI.BugReporting
{
    [TangoCreateWhenRegistered]
    public class DefaultBugReporter : FSEExtendedObject, IBugReporter
    {
        private bool _isInitialized;
        private Project Project;
        private TeamFoundationServiceClient _tfsClient;
        private BugReportingInfoResponse _bugReportingInfoResponse;
        private Bitmap _desktopBitmap;

        private IFSEApplicationManager ApplicationManager { get; set; }

        [TangoInject(TangoInjectMode.WhenAvailable)]
        private INotificationProvider NotificationProvider { get; set; }

        [TangoInject(TangoInjectMode.WhenAvailable)]
        private IMachineProvider MachineProvider { get; set; }

        [TangoInject(TangoInjectMode.WhenAvailable)]
        private IAuthenticationProvider AuthenticationProvider { get; set; }

        [TangoInject(TangoInjectMode.WhenAvailable)]
        private IConnectivityProvider ConnectivityProvider { get; set; }

        [TangoInject(TangoInjectMode.WhenAvailable)]
        private FSEServicesContainer Services { get; set; }

        [TangoInject(TangoInjectMode.WhenAvailable)]
        private ILoggingProvider LoggingProvider { get; set; }

        [TangoInject(TangoInjectMode.WhenAvailable)]
        private IRemoteDesktopProvider RemoteDesktopProvider { get; set; }


        /// <summary>
        /// Initializes a new instance of the <see cref="DefaultBugReporter"/> class.
        /// </summary>
        /// <param name="applicationManager">The application manager.</param>
        public DefaultBugReporter(IFSEApplicationManager applicationManager)
        {
            ApplicationManager = applicationManager;
            applicationManager.ApplicationReady += ApplicationManager_ApplicationReady;
        }

        /// <summary>
        /// Submits the specified bug.
        /// </summary>
        /// <param name="bug">The bug.</param>
        /// <returns></returns>
        public Task SubmitBug(Bug bug)
        {
            return Task.Factory.StartNew(() =>
            {
                if (!_isInitialized)
                {
                    Initialize().GetAwaiter().GetResult();
                }
                else
                {
                    if (!ConnectivityProvider.CheckOnline())
                    {
                        throw new InternetConnectionException();
                    }
                }

                LogManager.Log("Submitting report...");
                WorkItem item = new WorkItem();
                var tempFolder = TemporaryManager.CreateFolder();

                item.Title = bug.Title;
                item.Description = bug.Description;
                item.LoggedInUser = AuthenticationProvider.CurrentUser.Email;

                if (bug.Area != null)
                {
                    item.Area = bug.Area;
                }
                else
                {
                    item.Area = Project.GetAreaByName("FSE Public");

                    if (item.Area == null)
                    {
                        throw new NullReferenceException("Area 'FSE Public' not found.");
                    }
                }

                item.Iteration = Project.Iterations.FirstOrDefault();

                var twineUser = Project.Members.SingleOrDefault(x => x.Email.ToLower().Trim() == AuthenticationProvider.CurrentUser.Email.ToLower().Trim());

                if (twineUser != null && bug.AssignedTo != null)
                {
                    LogManager.Log($"Bug is created by '{twineUser.Email}' and is assigned to '{bug.AssignedTo.Email}'...");

                    item.CreatedBy = twineUser;
                    item.ChangedBy = twineUser;
                    item.AuthorizedAs = twineUser;
                    item.AssignedTo = bug.AssignedTo;
                }
                else
                {
                    var fseMember = Project.Members.SingleOrDefault(x => x.Email.ToLower() == _bugReportingInfoResponse.UserEmail.ToLower());

                    if (fseMember == null)
                    {
                        throw new KeyNotFoundException("Could not locate FSE team member.");
                    }

                    item.CreatedBy = fseMember;
                    item.ChangedBy = fseMember;
                    item.AuthorizedAs = fseMember;
                    item.AssignedTo = bug.AssignedTo != null ? bug.AssignedTo : fseMember;

                    LogManager.Log($"Bug is created by '{fseMember.Email}' and is assigned to '{item.AssignedTo.Email}'...");
                }


                item.StepsToReproduce = bug.StepsToReproduce.ToStringOrEmpty();

                item.FoundInBuild = ApplicationManager.Version.ToString();
                item.Priority = Priority.Priority3;
                item.Severity = Severity.Medium;
                item.State = State.New;
                item.Type = WorkItemType.Bug;
                item.Environment = AuthenticationProvider.CurrentEnvironment.Description;
                item.MachineType = (MachineType)Settings.LastConnectedMachineType;

                bool hasPPCLogs = false;
                bool hasFirmwareLogs = false;
                bool hasFSELogs = false;

                FileLogger appFileLogger = LogManager.Default.RegisteredLoggers.FirstOrDefault(x => x.GetType() == typeof(FileLogger)) as FileLogger;

                if (appFileLogger != null)
                {
                    LogManager.Log($"Attaching application log file ${appFileLogger.LogFile}");
                    string[] logFiles = GetLogFiles(appFileLogger);
                    foreach (string file in logFiles)
                    {
                        var appLogFile = tempFolder.CreateImaginaryFile();
                        File.Copy(file, appLogFile.Path);
                        item.Attachments.Add(new Attachment()
                        {
                            Description = "Application Log File",
                            FilePath = appLogFile.Path,
                            Name = Path.GetFileName(file),
                        });

                        hasFSELogs = true;
                    }
                }

                if (MachineOperator.EnableSessionLogFile)
                {
                    var file = MachineOperator.SessionLogger.LogFile;

                    if (file != null && File.Exists(file))
                    {
                        var sessionLogFile = tempFolder.CreateImaginaryFile();
                        File.Copy(file, sessionLogFile.Path);
                        item.Attachments.Add(new Attachment()
                        {
                            Description = "Session Log File",
                            FilePath = sessionLogFile.Path,
                            Name = Path.GetFileName(file),
                        });
                    }
                }

                if (MachineProvider.IsConnected && MachineProvider.IsPPCAvailable)
                {
                    var tempLogsFolder = TemporaryManager.CreateFolder();

                    try
                    {
                        var ppcLogFiles = LoggingProvider.GetApplicationLogFiles().Result;
                        var ppcLogFile = ppcLogFiles.OrderBy(x => x.DateCreated).LastOrDefault();

                        if (ppcLogFile != null)
                        {
                            var ppcLogFilePath = Path.Combine(tempLogsFolder, ppcLogFile.Name);
                            var handler = LoggingProvider.DownloadLogFile(ppcLogFile, ppcLogFilePath).Result;
                            handler.WaitForCompletion().GetAwaiter().GetResult();

                            item.Attachments.Add(new Attachment()
                            {
                                Description = "PPC Log File",
                                FilePath = ppcLogFilePath,
                                Name = ppcLogFile.Name
                            });

                            hasPPCLogs = true;
                        }
                    }
                    catch (Exception ex)
                    {
                        LogManager.Log(ex, "Error attaching remote PPC log file.");
                    }

                    try
                    {
                        var embeddedLogFiles = LoggingProvider.GetFirmwareLogFiles().Result;
                        var embeddedLogFile = embeddedLogFiles.OrderBy(x => x.DateCreated).LastOrDefault();

                        if (embeddedLogFile != null)
                        {
                            var embeddedLogFilePath = Path.Combine(tempLogsFolder, embeddedLogFile.Name);
                            var handler = LoggingProvider.DownloadLogFile(embeddedLogFile, embeddedLogFilePath).Result;
                            handler.WaitForCompletion().GetAwaiter().GetResult();

                            item.Attachments.Add(new Attachment()
                            {
                                Description = "Embedded Log File",
                                FilePath = embeddedLogFilePath,
                                Name = embeddedLogFile.Name
                            });

                            hasFirmwareLogs = true;
                        }
                    }
                    catch (Exception ex)
                    {
                        LogManager.Log(ex, "Error attaching remote embedded log file.");
                    }

                    try
                    {
                        var frame = RemoteDesktopProvider.GetDesktopScreenShot().Result;
                        var ppcDesktopFile = TemporaryManager.CreateImaginaryFile(".jpg");
                        File.WriteAllBytes(ppcDesktopFile, frame.ToEncoder<JpegEncoder>().ToArray());
                        frame.Dispose();
                        item.Attachments.Add(new Attachment()
                        {
                            Description = "PPC Screen Capture",
                            FilePath = ppcDesktopFile,
                            Name = "PPC Screen Capture.jpg"
                        });
                    }
                    catch (Exception ex)
                    {
                        LogManager.Log(ex, "Error retrieving remote PPC screenshot for bug report.");
                    }
                }

                if (_desktopBitmap != null)
                {
                    var tmpBitmap = TemporaryManager.CreateImaginaryFile(".jpg");
                    _desktopBitmap.SaveJpeg(tmpBitmap, 80);

                    item.Attachments.Add(new Attachment()
                    {
                        Description = "FSE Screen Capture",
                        FilePath = tmpBitmap,
                        Name = "FSE Screen Capture.jpg"
                    });

                    _desktopBitmap = null;
                }

                foreach (var attachment in bug.Attachments.ToList())
                {
                    if (File.Exists(attachment.File))
                    {
                        item.Attachments.Add(new Attachment()
                        {
                            Description = attachment.Description,
                            FilePath = attachment.File,
                            Name = attachment.Name,
                        });
                    }
                }

                if (MachineProvider.IsConnected)
                {
                    if (MachineProvider.MachineOperator.DeviceInformation != null)
                    {
                        item.EmbeddedVersion = MachineProvider.MachineOperator.DeviceInformation.Version;
                    }

                    item.MachineSerialNumber = MachineProvider.Machine.SerialNumber;
                }

                SystemInformationModel sysModel = new SystemInformationModel();
                sysModel.FSEVersion = ApplicationManager.Version.ToString();
                sysModel.PPCVersion = "N/A";
                sysModel.EmbeddedVersion = "N/A";
                sysModel.HostName = Environment.MachineName;
                sysModel.UserName = AuthenticationProvider.CurrentUser.Contact.FullName;
                sysModel.OsVersion = GetOsVersion();
                sysModel.UserEmail = AuthenticationProvider.CurrentUser.Email;
                sysModel.Description = bug.Description;
                sysModel.Comments = bug.Comments != null ? bug.Comments : "No comments.";
                sysModel.Exception = bug.Exception != null ? bug.Exception.FlattenException() : "No exception.";

                IMachineOperator op = MachineProvider.MachineOperator;

                LogManager.Log("Checking machine status...");

                if (MachineProvider.IsConnected)
                {
                    LogManager.Log("Machine is connected. Getting device information and configurations...");
                    sysModel.Machine = MachineProvider.Machine;

                    if (MachineProvider.MachineOperator.DeviceInformation != null)
                    {
                        sysModel.EmbeddedVersion = op.DeviceInformation.Version;
                    }

                    var m = op as ExternalBridgeTcpClient;
                    if (m != null && m.ApplicationInformation != null)
                    {
                        sysModel.PPCVersion = m.ApplicationInformation.Version;
                    }
                }
                else
                {
                    LogManager.Log("Machine is disconnected.");
                }

                String html = String.Empty;

                LogManager.Log("Generating HTML system information from template...");

                using (var stream = EmbeddedResourceHelper.GetEmbeddedResourceStream("Tango.FSE.UI.BugReporting.SystemInformationTemplate.cshtml"))
                {
                    StreamReader reader = new StreamReader(stream);
                    html = reader.ReadToEnd();
                }

                item.SystemInformation = String.Empty;
                item.StepsToReproduce = String.Format("<div style=\"white-space:pre\">{0}</div>", item.StepsToReproduce);

                LogManager.Log("Uploading work item...");
                var workItem = _tfsClient.UploadWorkItem(Project, item).Result;

                bug.URL = $"https://twinetfs.visualstudio.com/Tango/_workitems/edit/{workItem.ID}";

                if (hasFSELogs)
                {
                    String encodedData = StartupArgsHelper.EncodeBase64String($"-remote FSE {workItem.ID}");
                    sysModel.Actions.Add(new ActionModel()
                    {
                        Name = "Open FSE logs on Log Viewer",
                        Link = $@"Tango.FSE.LogViewer:\\{encodedData}",
                    });
                }

                if (hasPPCLogs)
                {
                    String encodedData = StartupArgsHelper.EncodeBase64String($"-remote PPC {workItem.ID}");
                    sysModel.Actions.Add(new ActionModel()
                    {
                        Name = "Open PPC logs on Log Viewer",
                        Link = $@"Tango.FSE.LogViewer:\\{encodedData}",
                    });
                }

                if (hasFirmwareLogs)
                {
                    String encodedData = StartupArgsHelper.EncodeBase64String($"-remote Embedded {workItem.ID}");
                    sysModel.Actions.Add(new ActionModel()
                    {
                        Name = "Open Firmware logs on Log Viewer",
                        Link = $@"Tango.FSE.LogViewer:\\{encodedData}",
                    });
                }

                FillPerformance(sysModel);

                String systemInformation = CodeGeneration.Helper.Parse(html, sysModel);

                LogManager.Log("Updating work item system information...");
                workItem = _tfsClient.UpdateWorkItemSystemInfo(Project, item, systemInformation).Result;

                LogManager.Log("Deleting temporary folder...");
                tempFolder.Delete();

                LogManager.Log("Upload completed.");
            });
        }

        /// <summary>
        /// Displays a bug submission dialog. When confirmed, will submit the specified bug.
        /// </summary>
        /// <param name="bug">The bug.</param>
        /// <returns></returns>
        public async Task ShowBugReportDialog(Bug bug)
        {
            BugReportViewVM vm = null;

            try
            {
                _desktopBitmap?.Dispose();
                GdiScreenCapture capture = new GdiScreenCapture();
                _desktopBitmap = capture.GetDesktopBitmap(new CaptureRegion()
                {
                    Left = (int)Application.Current.MainWindow.Left,
                    Top = (int)Application.Current.MainWindow.Top,
                    Width = (int)Application.Current.MainWindow.Width,
                    Height = (int)Application.Current.MainWindow.Height,
                });
            }
            catch (Exception ex)
            {
                LogManager.Log(ex, "Error capturing the user desktop bitmap for bug report.");
            }

            try
            {
                if (AuthenticationProvider.CurrentUser.HasPermission(Permissions.FSE_ModifyBugReport))
                {
                    await Task.Factory.StartNew(() =>
                    {
                        if (!_isInitialized)
                        {
                            using (NotificationProvider.PushTaskItem("Initializing issue reporting service..."))
                            {
                                Initialize().GetAwaiter().GetResult();
                            }
                        }
                        else
                        {
                            if (!ConnectivityProvider.CheckOnline())
                            {
                                throw new InternetConnectionException();
                            }
                        }
                    });

                    TeamMember assignedTo = Project.Members.SingleOrDefault(x => x.Email == Settings.LastReportAssignedTo);
                    Area area = Project.GetAreaByName(Settings.LastReportArea);

                    if (assignedTo == null)
                    {
                        assignedTo = Project.Members.SingleOrDefault(x => x.Email.ToLower() == _bugReportingInfoResponse.UserEmail.ToLower());
                    }

                    if (area == null)
                    {
                        area = Project.GetAreaByName("FSE");
                    }

                    vm = await NotificationProvider.ShowDialog(new BugReportFullViewVM(bug)
                    {
                        Areas = GetAreasWithoutFSEPublic(Project.Areas.ToList()),
                        TeamMembers = Project.Members.ToList(),
                        Area = area,
                        AssignedTo = assignedTo
                    });

                    if (vm.DialogResult)
                    {
                        Settings.LastReportAssignedTo = (vm as BugReportFullViewVM).AssignedTo.Email;
                        Settings.LastReportArea = (vm as BugReportFullViewVM).Area.Name;
                        Settings.Save();
                    }
                }
                else
                {
                    vm = await NotificationProvider.ShowDialog(new BugReportViewVM(bug));
                }
            }
            catch (Exception ex)
            {
                LogManager.Log(ex, "Error initializing bug report dialog.");
                await NotificationProvider.ShowError($"Error occurred while trying to initialize the bug report.\n{ex.FlattenMessage()}");
                return;
            }

            if (vm.DialogResult)
            {
                var snackbar = NotificationProvider.PushProgressSnackbar("Report Issue", "Submitting report...");

                try
                {
                    await SubmitBug(vm.Bug);

                    if (AuthenticationProvider.CurrentUser.HasPermission(Permissions.FSE_ModifyBugReport))
                    {
                        snackbar.ProgressCompleted("Issue submitted successfully.\nTap to view the bug report on your browser.", TimeSpan.FromSeconds(8), () =>
                        {
                            Process.Start(vm.Bug.URL);
                        });
                    }
                    else
                    {
                        snackbar.ProgressCompleted("Issue submitted successfully. Thank you!", TimeSpan.FromSeconds(5));
                    }
                }
                catch (Exception ex)
                {
                    LogManager.Log(ex, "Error submitting bug report.");
                    snackbar.ProgressFailed("Error occurred while trying to submit the report.", TimeSpan.FromSeconds(2));
                    await NotificationProvider.ShowError($"Error occurred while trying to submit the report.\n{ex.FlattenMessage()}");
                    await ShowBugReportDialog(vm.Bug);
                }
            }
        }

        /// <summary>
        /// Displays a bug submission dialog. When confirmed, will submit the new created bug.
        /// </summary>
        /// <returns></returns>
        public Task ShowBugReportDialog()
        {
            return ShowBugReportDialog(null);
        }

        private async void ApplicationManager_ApplicationReady(object sender, EventArgs e)
        {
            if (!_isInitialized)
            {
                try
                {
                    await Initialize();
                }
                catch { }
            }
        }

        private async Task Initialize()
        {
            if (await ConnectivityProvider.CheckOnlineAsync())
            {
                try
                {
                    _bugReportingInfoResponse = await Services.BugReportingService.GetBugReportingInfo();
                    _tfsClient = new TeamFoundationServiceClient(_bugReportingInfoResponse.CollectionUrl, String.Empty, _bugReportingInfoResponse.PersonalToken);
                    Project = await _tfsClient.GetProject("Tango");
                    _isInitialized = true;
                }
                catch (Exception ex)
                {
                    throw LogManager.Log(ex, "Error initializing bug reporter.");
                }
            }
            else
            {
                throw LogManager.Log(new InternetConnectionException());
            }
        }

        private string[] GetLogFiles(FileLogger logger)
        {
            string[] fileEntries = new string[1];
            fileEntries[0] = logger.LogFile;
            string fileName = Path.GetFileNameWithoutExtension(logger.LogFile);
            int indexPos = fileName.IndexOf(FileLogger.FILE_SET_EXTENSION);
            if (indexPos > 0)
            {
                string extension = Path.GetExtension(logger.LogFile);
                fileName = fileName.Substring(0, indexPos);
                fileEntries = Directory.GetFiles(logger.Folder, $"{fileName}*{extension}").Where(x => Path.GetFileName(x).StartsWith(logger.Tag)).OrderBy(x => x.Length).ThenBy(x => x).ToArray();
            }
            return fileEntries;
        }

        private String GetOsVersion()
        {
            try
            {
                string r = "";
                using (ManagementObjectSearcher searcher = new ManagementObjectSearcher("SELECT * FROM Win32_OperatingSystem"))
                {
                    ManagementObjectCollection information = searcher.Get();
                    if (information != null)
                    {
                        foreach (ManagementObject obj in information)
                        {
                            r = obj["Caption"].ToString() + " - " + obj["OSArchitecture"].ToString();
                        }
                    }
                    r = r.Replace("NT 5.1.2600", "XP");
                    r = r.Replace("NT 5.2.3790", "Server 2003");
                    return r;
                }
            }
            catch
            {
                return Environment.OSVersion.ToString();
            }
        }

        private List<Area> GetAreasWithoutFSEPublic(List<Area> areas)
        {
            List<Area> partial = new List<Area>();
            CloneAreasWithoutFSEPublic(areas.ToList(), partial);
            return partial;
        }

        private void CloneAreasWithoutFSEPublic(List<Area> all, List<Area> partial)
        {
            foreach (var area in all)
            {
                if (area.Name != "FSE Public")
                {
                    var cloned = new Area()
                    {
                        Name = area.Name,
                        Path = area.Path
                    };

                    partial.Add(cloned);

                    CloneAreasWithoutFSEPublic(area.SubAreas, cloned.SubAreas);
                }
            }
        }

        public async Task<List<Bug>> GetConnectedMachineBugs(DateTime startUtc, DateTime endUtc)
        {
            List<Bug> list = new List<Bug>();

            if (!MachineProvider.IsConnected)
            {
                LogManager.Log("Could not get connected machine bugs while machine is not connected.", LogCategory.Warning);
                return new List<Bug>();
            }

            try
            {
                if (!_isInitialized)
                {
                    await Initialize();
                }

                var workItems = await _tfsClient.GetWorkItemsForMachine(Project, MachineProvider.Machine.SerialNumber, startUtc, endUtc);

                if (workItems.Count > 0)
                {
                    return workItems.Where(x => x.CreatedDate >= startUtc && x.CreatedDate <= endUtc).Select(x => new Bug()
                    {
                        Area = x.Area,
                        AssignedTo = x.AssignedTo,
                        CreatedBy = x.CreatedBy,
                        Comments = x.Comment,
                        CreatedDate = x.CreatedDate,
                        Description = x.Description,
                        StepsToReproduce = x.StepsToReproduce,
                        Title = x.Title,
                        LoggedInUser = x.LoggedInUser.IsNotNullOrEmpty() ? x.LoggedInUser : x.CreatedBy.Email,
                        Type = BugType.PPC,
                        URL = $"https://twinetfs.visualstudio.com/Tango/_workitems/edit/{x.ID}"
                    }).ToList();
                }
            }
            catch (Exception ex)
            {
                LogManager.Log(ex, "Could not get machine work items from VSTS.");
            }

            return list;
        }

        #region System Performance

        private void FillPerformance(SystemInformationModel model)
        {
            try
            {
                var computerInfo = new Microsoft.VisualBasic.Devices.ComputerInfo();
                model.RAM = FileHelper.GetFriendlyFileSize((long)computerInfo.TotalPhysicalMemory);
            }
            catch { }

            try
            {
                using (ManagementObjectSearcher mos = new ManagementObjectSearcher("root\\CIMV2", "SELECT * FROM Win32_Processor"))
                {
                    foreach (ManagementObject mo in mos.Get())
                    {
                        model.Processor = mo["Name"].ToStringSafe();
                    }
                }
            }
            catch { }

            try
            {
                using (var mos = new ManagementObjectSearcher("select * from Win32_VideoController"))
                {
                    foreach (ManagementObject mo in mos.Get())
                    {
                        model.GPU = mo["Name"].ToStringSafe();
                    }
                }
            }
            catch { }

            try
            {
                bool is64bit = !string.IsNullOrEmpty(Environment.GetEnvironmentVariable("PROCESSOR_ARCHITEW6432"));
                model.Architecure = is64bit ? "x64" : "x86";
            }
            catch { }

            try
            {
                var cPath = Path.GetPathRoot(Environment.GetFolderPath(Environment.SpecialFolder.System));
                DriveInfo drive = new DriveInfo(cPath);
                model.FreeSpace = FileHelper.GetFriendlyFileSize(drive.TotalFreeSpace);
            }
            catch { }
        }

        #endregion
    }
}