using GalaSoft.MvvmLight.Ioc;
using RealTimeGraphEx.Controllers;
using RealTimeGraphEx.DataSeries;
using System;
using System.Collections.Generic;
using System.Collections.ObjectModel;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Media;
using Tango.Core.Commands;
using Tango.Integration.Observables;
using Tango.MachineStudio.Common.Controls;
using Tango.MachineStudio.Common.Notifications;
using Tango.MachineStudio.Common.StudioApplication;
using Tango.SharedUI;
using System.Runtime.CompilerServices;
using System.Windows.Threading;
using Tango.Settings;
using Tango.MachineStudio.Developer.Views;
using Tango.Video.DirectCapture;
using Tango.Integration.Operators;
using Tango.PMR.Diagnostics;
using System.Reflection;
using Tango.PMR.Common;
using Tango.SharedUI.Helpers;
using Tango.Transport;
using Tango.Integration.Printing;
using Tango.Integration.Diagnostics;
using Microsoft.Win32;
using Tango.MachineStudio.Technician.ViewModels;
using Tango.MachineStudio.Common.Diagnostics;
using Tango.MachineStudio.Common.Video;
using Tango.Integration.Services;
using Tango.MachineStudio.Developer.Navigation;
using System.Data.Entity;
using Tango.MachineStudio.Common.Authentication;
using DeepEqual.Syntax;
using System.ComponentModel;
using System.Windows.Data;

namespace Tango.MachineStudio.Developer.ViewModels
{
    /// <summary>
    /// Represents the developer module main view, view model.
    /// </summary>
    /// <seealso cref="Tango.SharedUI.ViewModel" />
    public class MainViewVM : ViewModel, IShutdownRequestBlocker
    {
        private static object _syncLock = new object();

        private INotificationProvider _notification;
        private TimeSpan _runningJobEstimatedDuration;
        private JobHandler _jobHandler;
        private DeveloperNavigationManager _navigation;
        private ObservablesContext _dbJobContext;
        private bool _blockInvalidateCommands;
        private IAuthenticationProvider _authentication;
        private ObservablesContext _machineDBContext;

        #region Properties

        private ObservableCollection<Machine> _machines;
        /// <summary>
        /// Gets or sets the machines.
        /// </summary>
        public ObservableCollection<Machine> Machines
        {
            get { return _machines; }
            set { _machines = value; RaisePropertyChangedAuto(); }
        }

        private ObservableCollection<ColorSpace> _colorSpaces;
        /// <summary>
        /// Gets or sets the color spaces.
        /// </summary>
        public ObservableCollection<ColorSpace> ColorSpaces
        {
            get { return _colorSpaces; }
            set { _colorSpaces = value; RaisePropertyChangedAuto(); }
        }

        private ObservableCollection<Rml> _rmls;
        /// <summary>
        /// Gets or sets the RMLS.
        /// </summary>
        public ObservableCollection<Rml> Rmls
        {
            get { return _rmls; }
            set { _rmls = value; RaisePropertyChangedAuto(); }
        }

        private ObservableCollection<WindingMethod> _windingMethods;

        public ObservableCollection<WindingMethod> WindingMethods
        {
            get { return _windingMethods; }
            set { _windingMethods = value; RaisePropertyChangedAuto(); }
        }


        /// <summary>
        /// Gets or sets the application manager.
        /// </summary>
        public IStudioApplicationManager ApplicationManager { get; set; }

        /// <summary>
        /// Gets or sets the video capture provider.
        /// </summary>
        public IVideoCaptureProvider VideoCaptureProvider { get; set; }

        protected Machine _selectedMachine;
        /// <summary>
        /// Gets or sets the selected machine.
        /// </summary>
        public Machine SelectedMachine
        {
            get { return _selectedMachine; }
            set
            {
                _selectedMachine = value;
                OnSelectedMachineChanged();
                RaisePropertyChangedAuto();
                InvalidateRelayCommands();

                if (_selectedMachine != null)
                {
                    _selectedMachine.Saved -= SelectedMachine_Saved;
                    _selectedMachine.Saved += SelectedMachine_Saved;
                }
            }
        }

        private List<LiquidTypesRml> _liquidTypesRmls;
        /// <summary>
        /// Gets or sets the liquid types RMLS.
        /// </summary>
        public List<LiquidTypesRml> LiquidTypesRmls
        {
            get { return _liquidTypesRmls; }
            set { _liquidTypesRmls = value; RaisePropertyChangedAuto(); }
        }

        private ProcessParametersTablesGroup _rmlProcessParametersTablesGroup;
        /// <summary>
        /// Gets or sets the RML process parameters table group (cloned).
        /// </summary>
        public ProcessParametersTablesGroup RmlProcessParametersTableGroup
        {
            get { return _rmlProcessParametersTablesGroup; }
            set
            { _rmlProcessParametersTablesGroup = value; RaisePropertyChangedAuto(); OnProcessParametersTableGroupChanged(); }
        }

        public void OnDropSegment(Segment dragged, Segment dropped)
        {
            dragged.SegmentIndex = dropped.SegmentIndex;
            dropped.SegmentIndex++;

            int index = 1;

            foreach (var segment in ActiveJob.Segments.OrderBy(x => x.SegmentIndex))
            {
                segment.SegmentIndex = index++;
            }

            SegmentsCollectionView.Refresh();
        }

        private ObservableCollection<ProcessParametersTablesGroup> _groupsHistory;
        /// <summary>
        /// Gets or sets the RML process parameters groups history.
        /// </summary>
        public ObservableCollection<ProcessParametersTablesGroup> GroupsHistory
        {
            get { return _groupsHistory; }
            set { _groupsHistory = value; RaisePropertyChangedAuto(); }
        }

        private ProcessParametersTablesGroup _selectedGroupHistory;
        /// <summary>
        /// Gets or sets the selected process parameters tables group history.
        /// </summary>
        public ProcessParametersTablesGroup SelectedGroupHistory
        {
            get { return _selectedGroupHistory; }
            set { _selectedGroupHistory = value; RaisePropertyChangedAuto(); OnSelectedGroupHistoryChanged(); }
        }

        private ProcessParametersTable _selectedProcessParametersTable;
        /// <summary>
        /// Gets or sets the selected process parameters table.
        /// </summary>
        public ProcessParametersTable SelectedProcessParametersTable
        {
            get { return _selectedProcessParametersTable; }
            set { _selectedProcessParametersTable = value; RaisePropertyChangedAuto(); OnSelectedParametersTableChanged(); }
        }

        private Job _activeJob;
        /// <summary>
        /// Gets or sets the selected machine job.
        /// </summary>
        public Job ActiveJob
        {
            get { return _activeJob; }
            set
            {
                _activeJob = value;
                RaisePropertyChangedAuto();
                OnActiveJobChanged();
            }
        }

        private Job _selectedMachineJob;
        /// <summary>
        /// Gets or sets the selected machine job.
        /// </summary>
        public Job SelectedMachineJob
        {
            get { return _selectedMachineJob; }
            set { _selectedMachineJob = value; RaisePropertyChangedAuto(); }
        }

        private ObservableCollection<Job> _selectedJobs;
        /// <summary>
        /// Gets or sets the selected jobs.
        /// </summary>
        public ObservableCollection<Job> SelectedJobs
        {
            get { return _selectedJobs; }
            set { _selectedJobs = value; RaisePropertyChangedAuto(); }
        }

        private Segment _selectedSegment;
        /// <summary>
        /// Gets or sets the job selected segment.
        /// </summary>
        public Segment SelectedSegment
        {
            get { return _selectedSegment; }
            set { _selectedSegment = value; RaisePropertyChangedAuto(); OnSelectedSegmentChanged(); }
        }

        private ObservableCollection<Segment> _selectedSegments;
        /// <summary>
        /// Gets or sets the selected segments.
        /// </summary>
        public ObservableCollection<Segment> SelectedSegments
        {
            get { return _selectedSegments; }
            set { _selectedSegments = value; RaisePropertyChangedAuto(); }
        }

        private BrushStop _selectedBrushStop;
        /// <summary>
        /// Gets or sets the selected segment selected brush stop.
        /// </summary>
        public BrushStop SelectedBrushStop
        {
            get { return _selectedBrushStop; }
            set { _selectedBrushStop = value; RaisePropertyChangedAuto(); }
        }

        private ObservableCollection<BrushStop> _selectedBrushStops;
        /// <summary>
        /// Gets or sets the selected brush stops.
        /// </summary>
        public ObservableCollection<BrushStop> SelectedBrushStops
        {
            get { return _selectedBrushStops; }
            set { _selectedBrushStops = value; RaisePropertyChangedAuto(); }
        }

        private Rml _selectedRML;
        /// <summary>
        /// Gets or sets the selected RML.
        /// </summary>
        public Rml SelectedRML
        {
            get { return _selectedRML; }
            set
            {
                _selectedRML = value;
                InvalidateLiquidFactorsAndProcessTables();
                RaisePropertyChangedAuto();
                InvalidateRelayCommands();
            }
        }

        private bool _isSideBarOpened;
        /// <summary>
        /// Gets or sets a value indicating whether the configuration panels are opened.
        /// </summary>
        public bool IsSideBarOpened
        {
            get { return _isSideBarOpened; }
            set { _isSideBarOpened = value; RaisePropertyChangedAuto(); }
        }

        private TimeSpan _estimatedDuration;
        /// <summary>
        /// Gets or sets the estimated duration for the selected job.
        /// </summary>
        public TimeSpan EstimatedDuration
        {
            get { return _estimatedDuration; }
            set { _estimatedDuration = value; RaisePropertyChangedAuto(); }
        }

        private bool _isJobRunning;
        /// <summary>
        /// Gets or sets a value indicating whether a job is currently running.
        /// </summary>
        public bool IsJobRunning
        {
            get { return _isJobRunning; }
            set { _isJobRunning = value; RaisePropertyChangedAuto(); }
        }

        private Job _runningJob;
        /// <summary>
        /// Gets or sets the currently running job.
        /// </summary>
        public Job RunningJob
        {
            get { return _runningJob; }
            set { _runningJob = value; RaisePropertyChangedAuto(); }
        }

        private double _runningJobProgress;
        /// <summary>
        /// Gets or sets the running job current progress.
        /// </summary>
        public double RunningJobProgress
        {
            get { return _runningJobProgress; }
            set { _runningJobProgress = value; RaisePropertyChangedAuto(); }
        }

        private TimeSpan _runningJobRemainingTime;
        /// <summary>
        /// Gets or sets the job remaining time.
        /// </summary>
        public TimeSpan RunningJobRemainingTime
        {
            get { return _runningJobRemainingTime; }
            set { _runningJobRemainingTime = value; RaisePropertyChangedAuto(); }
        }

        private bool _isJobCompleted;
        /// <summary>
        /// Gets or sets a value indicating whether the running job has completed successfully.
        /// </summary>
        public bool IsJobCompleted
        {
            get { return _isJobCompleted; }
            set { _isJobCompleted = value; RaisePropertyChangedAuto(); }
        }

        private bool _isJobFailed;
        /// <summary>
        /// Gets or sets a value indicating whether the running job has failed.
        /// </summary>
        public bool IsJobFailed
        {
            get { return _isJobFailed; }
            set { _isJobFailed = value; RaisePropertyChangedAuto(); }
        }

        private bool _showJobStatus;
        /// <summary>
        /// Gets or sets a value indicating whether to show all the relevant job status areas.
        /// </summary>
        public bool ShowJobStatus
        {
            get { return _showJobStatus; }
            set { _showJobStatus = value; RaisePropertyChangedAuto(); }
        }

        private bool _isJobCanceled;
        /// <summary>
        /// Gets or sets a value indicating whether the last running job was canceled.
        /// </summary>
        public bool IsJobCanceled
        {
            get { return _isJobCanceled; }
            set { _isJobCanceled = value; RaisePropertyChangedAuto(); }
        }

        private IMachineOperator _machineOperator;
        /// <summary>
        /// Gets or sets the machine operator.
        /// </summary>
        public IMachineOperator MachineOperator
        {
            get { return _machineOperator; }
            set { _machineOperator = value; RaisePropertyChangedAuto(); }
        }

        private IRealTimeGraph _fullScreenGraph;
        /// <summary>
        /// Gets or sets the full screen graph.
        /// </summary>
        public IRealTimeGraph FullScreenGraph
        {
            get { return _fullScreenGraph; }
            set { _fullScreenGraph = value; RaisePropertyChangedAuto(); }
        }

        private List<Segment> _runningJobSegments;
        /// <summary>
        /// Gets or sets the running job segments.
        /// </summary>
        public List<Segment> RunningJobSegments
        {
            get { return _runningJobSegments; }
            set { _runningJobSegments = value; RaisePropertyChangedAuto(); }
        }

        private ICollectionView _jobsCollectionView;
        /// <summary>
        /// Gets or sets the jobs collection view.
        /// </summary>
        public ICollectionView JobsCollectionView
        {
            get { return _jobsCollectionView; }
            set
            {
                _jobsCollectionView = value;
                BindingOperations.EnableCollectionSynchronization(_jobsCollectionView, _syncLock);

                RaisePropertyChangedAuto();
            }
        }

        private ICollectionView _segmentsCollectionView;
        /// <summary>
        /// Gets or sets the segments collection view.
        /// </summary>
        public ICollectionView SegmentsCollectionView
        {
            get { return _segmentsCollectionView; }
            set
            {
                _segmentsCollectionView = value;
                BindingOperations.EnableCollectionSynchronization(_segmentsCollectionView, _syncLock);
                RaisePropertyChangedAuto();
            }
        }

        private ICollectionView _brushStopsCollectionView;
        /// <summary>
        /// Gets or sets the brush stops collection view.
        /// </summary>
        public ICollectionView BrushStopsCollectionView
        {
            get { return _brushStopsCollectionView; }
            set
            {
                _brushStopsCollectionView = value;
                BindingOperations.EnableCollectionSynchronization(_brushStopsCollectionView, _syncLock);
                RaisePropertyChangedAuto();
            }
        }

        #endregion

        #region Commands

        /// <summary>
        /// Gets or sets the edit machine command.
        /// </summary>
        public RelayCommand EditMachineCommand { get; set; }

        /// <summary>
        /// Gets or sets the edit RML command.
        /// </summary>
        public RelayCommand EditRMLCommand { get; set; }

        /// <summary>
        /// Gets or sets the toggle side bar command.
        /// </summary>
        public RelayCommand ToggleSideBarCommand { get; set; }

        /// <summary>
        /// Gets or sets the save process parameters command.
        /// </summary>
        public RelayCommand SaveProcessParametersCommand { get; set; }

        /// <summary>
        /// Gets or sets the save liquid factors command.
        /// </summary>
        public RelayCommand SaveLiquidFactorsCommand { get; set; }

        /// <summary>
        /// Gets or sets the add segment command.
        /// </summary>
        public RelayCommand AddSegmentCommand { get; set; }

        /// <summary>
        /// Gets or sets the remove segment command.
        /// </summary>
        public RelayCommand RemoveSegmentCommand { get; set; }

        /// <summary>
        /// Gets or sets the add job command.
        /// </summary>
        public RelayCommand AddJobCommand { get; set; }

        /// <summary>
        /// Gets or sets the remove job command.
        /// </summary>
        public RelayCommand RemoveJobCommand { get; set; }

        /// <summary>
        /// Gets or sets the add brush stop command.
        /// </summary>
        public RelayCommand AddBrushStopCommand { get; set; }

        /// <summary>
        /// Gets or sets the remove brush stop command.
        /// </summary>
        public RelayCommand RemoveBrushStopCommand { get; set; }

        /// <summary>
        /// Gets or sets the save job command.
        /// </summary>
        public RelayCommand SaveJobCommand { get; set; }

        /// <summary>
        /// Gets or sets the discard job command.
        /// </summary>
        public RelayCommand DiscardJobCommand { get; set; }

        /// <summary>
        /// Gets or sets the start job command.
        /// </summary>
        public RelayCommand StartJobCommand { get; set; }

        /// <summary>
        /// Gets or sets the stop job command.
        /// </summary>
        public RelayCommand StopJobCommand { get; set; }

        /// <summary>
        /// Gets or sets the close job completion status command.
        /// </summary>
        public RelayCommand CloseJobCompletionStatusCommand { get; set; }

        /// <summary>
        /// Gets or sets the load job command.
        /// </summary>
        public RelayCommand LoadJobCommand { get; set; }

        /// <summary>
        /// Gets or sets the duplicate job command.
        /// </summary>
        public RelayCommand DuplicateJobCommand { get; set; }

        /// <summary>
        /// Gets or sets the duplicate segment command.
        /// </summary>
        public RelayCommand DuplicateSegmentCommand { get; set; }

        /// <summary>
        /// Gets or sets the duplicate brush stop command.
        /// </summary>
        public RelayCommand DuplicateBrushStopCommand { get; set; }

        #endregion

        #region Constructors

        /// <summary>
        /// Initializes a new instance of the <see cref="MainViewVM"/> class.
        /// </summary>
        public MainViewVM() : base()
        {

        }

        /// <summary>
        /// Initializes a new instance of the <see cref="MainViewVM"/> class.
        /// </summary>
        /// <param name="applicationManager">The application manager.</param>
        /// <param name="notificationProvider">The notification provider.</param>
        [PreferredConstructor]
        public MainViewVM(IStudioApplicationManager applicationManager, INotificationProvider notificationProvider, IDiagnosticsFrameProvider diagnosticsFrameProvider, IVideoCaptureProvider videoCaptureProvider, DeveloperNavigationManager navigation, IAuthenticationProvider authentication) : this()
        {
            using (var db = ObservablesContext.CreateDefault())
            {
                Machines = db.Machines.ToObservableCollection();
            }

            _machineDBContext = ObservablesContext.CreateDefault();

            SelectedJobs = new ObservableCollection<Job>();

            _authentication = authentication;

            _notification = notificationProvider;
            _navigation = navigation;
            ApplicationManager = applicationManager;
            VideoCaptureProvider = videoCaptureProvider;

            //Initialize Commands...
            EditMachineCommand = new RelayCommand(EditMachine, () => SelectedMachine != null);
            EditRMLCommand = new RelayCommand(EditRML, () => SelectedRML != null);
            ToggleSideBarCommand = new RelayCommand(() => IsSideBarOpened = !IsSideBarOpened);
            SaveProcessParametersCommand = new RelayCommand(SaveProcessParameters, () => SelectedRML != null && SelectedRML.ProcessParametersTablesGroups.Count > 0);
            SaveLiquidFactorsCommand = new RelayCommand(SaveLiquidFactors, () => SelectedRML != null);
            AddSegmentCommand = new RelayCommand(AddSegment, () => ActiveJob != null);
            RemoveSegmentCommand = new RelayCommand(RemoveSelectedSegments, () => SelectedSegment != null);
            AddJobCommand = new RelayCommand(AddJob, () => SelectedMachine != null);
            RemoveJobCommand = new RelayCommand(RemoveSelectedJobs, () => SelectedMachineJob != null);
            AddBrushStopCommand = new RelayCommand(AddBrushStop, () => SelectedSegment != null);
            RemoveBrushStopCommand = new RelayCommand(RemoveSelectedBrushStops, () => SelectedBrushStop != null);
            SaveJobCommand = new RelayCommand(SaveJob, () => SelectedMachine != null);
            DiscardJobCommand = new RelayCommand(DiscardJob, () => SelectedMachine != null);
            StartJobCommand = new RelayCommand(StartJob, () => ActiveJob != null && !IsJobRunning);
            StopJobCommand = new RelayCommand(StopJob, () => IsJobRunning);
            CloseJobCompletionStatusCommand = new RelayCommand(CloseJobCompletionStatusBar);
            LoadJobCommand = new RelayCommand(LoadJob, () => SelectedMachineJob != null);
            DuplicateJobCommand = new RelayCommand(DuplicateSelectedJobs, () => SelectedMachineJob != null);
            DuplicateSegmentCommand = new RelayCommand(DuplicateSelectedSegments, () => SelectedSegment != null);
            DuplicateBrushStopCommand = new RelayCommand(DuplicateSelectedBrushStops, () => SelectedBrushStop != null);

            ApplicationManager.ConnectedMachineChanged += ApplicationManager_ConnectedMachineChanged;
        }

        #endregion

        #region Event Handlers

        /// <summary>
        /// Handles the application manager connected machine changes event.
        /// </summary>
        /// <param name="sender">The sender.</param>
        /// <param name="machine">The machine.</param>
        private void ApplicationManager_ConnectedMachineChanged(object sender, IExternalBridgeClient machine)
        {
            MachineOperator = machine;
        }

        /// <summary>
        /// Handles the Saved event of the SelectedMachine.
        /// </summary>
        /// <param name="sender">The source of the event.</param>
        /// <param name="e">The <see cref="EventArgs"/> instance containing the event data.</param>
        private void SelectedMachine_Saved(object sender, EventArgs e)
        {
            InvalidateLiquidFactorsAndProcessTables();
            SelectedMachine.Reload(_machineDBContext);
        }

        /// <summary>
        /// Handles the LengthChanged event of the SelectedJob.
        /// </summary>
        /// <param name="sender">The source of the event.</param>
        /// <param name="e">The <see cref="EventArgs"/> instance containing the event data.</param>
        private void ActiveJob_LengthChanged(object sender, EventArgs e)
        {
            UpdateEstimatedDuration();
        }

        /// <summary>
        /// Handles the DyeingSpeedMinInkUptakeChanged event of the SelectedProcessParametersTable.
        /// </summary>
        /// <param name="sender">The source of the event.</param>
        /// <param name="e">The <see cref="EventArgs"/> instance containing the event data.</param>
        private void SelectedProcessParametersTable_DyeingSpeedMinInkUptakeChanged(object sender, EventArgs e)
        {
            if (SelectedSegment != null)
            {
                foreach (var liquidVolume in SelectedSegment.BrushStops.SelectMany(x => x.LiquidVolumes))
                {
                    liquidVolume.Invalidate();
                }
            }

            UpdateEstimatedDuration();
        }

        #endregion

        #region Virtual Methods

        protected virtual void OnSelectedParametersTableChanged()
        {
            if (SelectedProcessParametersTable != null)
            {
                SelectedProcessParametersTable.DyeingSpeedMinInkUptakeChanged -= SelectedProcessParametersTable_DyeingSpeedMinInkUptakeChanged;
                SelectedProcessParametersTable.DyeingSpeedMinInkUptakeChanged += SelectedProcessParametersTable_DyeingSpeedMinInkUptakeChanged;
            }

            SetSegmentBrushStopsLiquidVolumes(SelectedSegment);

            UpdateEstimatedDuration();
        }

        /// <summary>
        /// Called when the process parameters table group has been changed
        /// </summary>
        private void OnProcessParametersTableGroupChanged()
        {
            if (RmlProcessParametersTableGroup != null && RmlProcessParametersTableGroup.ProcessParametersTables.Count > 0)
            {
                SelectedProcessParametersTable = RmlProcessParametersTableGroup.ProcessParametersTables.First();
            }

            UpdateEstimatedDuration();
        }

        /// <summary>
        /// Called when the selected segment has been changed
        /// </summary>
        protected virtual void OnSelectedSegmentChanged()
        {
            if (SelectedSegment != null)
            {
                SetSegmentBrushStopsLiquidVolumes(SelectedSegment);
                SelectedBrushStop = SelectedSegment.BrushStops.FirstOrDefault();

                BrushStopsCollectionView = CollectionViewSource.GetDefaultView(SelectedSegment.BrushStops);
                BrushStopsCollectionView.SortDescriptions.Add(new SortDescription(nameof(BrushStop.StopIndex), ListSortDirection.Ascending));
            }
        }

        /// <summary>
        /// Called when the selected group history has been changed
        /// </summary>
        protected virtual void OnSelectedGroupHistoryChanged()
        {
            if (SelectedGroupHistory != null)
            {
                RmlProcessParametersTableGroup = SelectedGroupHistory.CloneGroup();
            }
        }

        /// <summary>
        /// Called when the machine has been changed
        /// </summary>
        protected virtual void OnSelectedMachineChanged()
        {
            if (SelectedMachine != null)
            {
                ReloadMachine();
                JobsCollectionView = CollectionViewSource.GetDefaultView(SelectedMachine.Jobs);
                JobsCollectionView.SortDescriptions.Add(new SortDescription(nameof(Job.LastUpdated), ListSortDirection.Descending));
                InvalidateLiquidFactorsAndProcessTables();
            }
        }

        private void ReloadMachine()
        {
            _machineDBContext.Dispose();
            _machineDBContext = ObservablesContext.CreateDefault();
            _machineDBContext.Configuration.LazyLoadingEnabled = true;
            _selectedMachine = _machineDBContext.Machines.SingleOrDefault(x => x.Guid == _selectedMachine.Guid);
            RaisePropertyChanged(nameof(SelectedMachine));

            JobsCollectionView = CollectionViewSource.GetDefaultView(SelectedMachine.Jobs);
            JobsCollectionView.SortDescriptions.Add(new SortDescription(nameof(Job.LastUpdated), ListSortDirection.Descending));
        }

        #endregion

        #region Private Methods

        private void OnActiveJobChanged()
        {
            if (ActiveJob != null)
            {
                SegmentsCollectionView = CollectionViewSource.GetDefaultView(ActiveJob.Segments);
                SegmentsCollectionView.SortDescriptions.Add(new SortDescription(nameof(Segment.SegmentIndex), ListSortDirection.Ascending));
            }
        }

        private void LoadJob()
        {
            if (SelectedMachineJob != null)
            {
                SelectedSegments = new ObservableCollection<Segment>();
                SelectedBrushStops = new ObservableCollection<BrushStop>();
                SelectedRML = null;
                SelectedSegment = null;
                SelectedGroupHistory = null;
                SelectedBrushStop = null;
                SelectedProcessParametersTable = null;
                RmlProcessParametersTableGroup = null;

                using (_notification.PushTaskItem("Loading job details..."))
                {
                    //await Task.Factory.StartNew(() =>
                    //{
                    _blockInvalidateCommands = false;

                    _dbJobContext = ObservablesContext.CreateDefault();
                    _dbJobContext.Configuration.LazyLoadingEnabled = true;

                    ColorSpaces = _dbJobContext.ColorSpaces.ToObservableCollection();
                    Rmls = _dbJobContext.Rmls.ToObservableCollection();
                    WindingMethods = _dbJobContext.WindingMethods.ToObservableCollection();

                    _activeJob = _dbJobContext.Jobs.SingleOrDefault(x => x.Guid == SelectedMachineJob.Guid);

                    _selectedRML = ActiveJob.Rml;

                    _selectedSegment = ActiveJob.Segments.FirstOrDefault();

                    ActiveJob.LengthChanged -= ActiveJob_LengthChanged;
                    ActiveJob.LengthChanged += ActiveJob_LengthChanged;

                    ActiveJob = _activeJob;

                    SelectedRML = _selectedRML;
                    SelectedSegment = _selectedSegment;

                    UpdateEstimatedDuration();

                    _blockInvalidateCommands = false;
                    InvalidateRelayCommands();

                    InvokeUI(() => _navigation.NavigateTo(DeveloperNavigationView.JobView));
                    //});
                }
            }
        }

        private async void SaveJob()
        {
            if (ActiveJob != null)
            {
                using (_notification.PushTaskItem("Saving job to database..."))
                {
                    ActiveJob.LastUpdated = DateTime.UtcNow;
                    ActiveJob.Rml = SelectedRML;

                    await ActiveJob.SaveAsync(_dbJobContext);
                    ReloadMachine();
                    SelectedMachineJob = SelectedMachine.Jobs.SingleOrDefault(x => x.Guid == ActiveJob.Guid);
                }
            }
        }

        private void DiscardJob()
        {
            bool jobModified = !ActiveJob.CompareUsingJson(SelectedMachineJob);

            if (jobModified)
            {
                if (_notification.ShowQuestion("This will discard the current job changes. Are you sure?"))
                {
                    _dbJobContext.Dispose();
                    _navigation.NavigateTo(DeveloperNavigationView.MachineJobSelectionView);
                }
            }
            else
            {
                _dbJobContext.Dispose();
                _navigation.NavigateTo(DeveloperNavigationView.MachineJobSelectionView);
            }
        }

        private void CloseJobCompletionStatusBar()
        {
            _navigation.NavigateTo(DeveloperNavigationView.JobView);
            IsJobCompleted = false;
            IsJobFailed = false;
            IsJobCanceled = false;
            ShowJobStatus = false;
            RunningJob = null;
        }

        private void StopJob()
        {
            IsJobRunning = false;
            IsJobCanceled = true;
            _jobHandler.Cancel();
        }

        private void FailJob()
        {
            IsJobRunning = false;
            IsJobFailed = true;
        }

        private void CompleteJob()
        {
            IsJobRunning = false;
            IsJobCompleted = true;
        }

        private void StartJob()
        {
            if (MachineOperator == null || MachineOperator.State != TransportComponentState.Connected)
            {
                _notification.ShowError("No machine connected. Could not execute the specified job.");
                return;
            }

            if (SelectedProcessParametersTable == null)
            {
                _notification.ShowError("No process parameters table selected. Could not execute the specified job.");
                return;
            }

            RunningJobRemainingTime = TimeSpan.Zero;
            RunningJobProgress = 0;
            IsJobFailed = false;
            IsJobCanceled = false;
            IsJobCompleted = false;
            IsJobRunning = true;
            ShowJobStatus = true;
            RunningJob = ActiveJob;
            _runningJobEstimatedDuration = EstimatedDuration;

            RunningJobSegments = CreateRunningJobEffectiveSegments(RunningJob);

            _navigation.NavigateTo(DeveloperNavigationView.RunningJobView);

            _jobHandler = MachineOperator.Print(ActiveJob, SelectedProcessParametersTable);

            _jobHandler.StatusReceived += (x, status) =>
            {
                RunningJobRemainingTime = _runningJobEstimatedDuration - TimeSpan.FromSeconds(RunningJobProgress / (SelectedProcessParametersTable.DyeingSpeed / 100d));
                RunningJobProgress = status.Progress;

                foreach (var segment in RunningJobSegments)
                {
                    var previousSegmentsWithThis = RunningJobSegments.Where(s => RunningJobSegments.IndexOf(s) <= RunningJobSegments.IndexOf(segment)).ToList();
                    var segmentsDuration = TimeSpan.FromSeconds(previousSegmentsWithThis.Sum(s => s.Length) / (SelectedProcessParametersTable.DyeingSpeed / 100d));
                    var segmentDuration = TimeSpan.FromSeconds(segment.Length / (SelectedProcessParametersTable.DyeingSpeed / 100d));
                    TimeSpan remaining = segmentsDuration - TimeSpan.FromSeconds(RunningJobProgress / (SelectedProcessParametersTable.DyeingSpeed / 100d));
                    if (remaining >= TimeSpan.Zero)
                    {
                        segment.RemainingTime = remaining;
                    }
                    if (remaining < segmentDuration)
                    {
                        segment.Started = true;
                    }
                    if (remaining <= TimeSpan.Zero)
                    {
                        segment.Completed = true;
                        segment.Started = false;
                    }
                }
            };

            _jobHandler.Failed += (x, ex) =>
            {
                FailJob();

                InvokeUI(() =>
                {
                    _notification.ShowError("Job failed. " + ex.Message);
                });
            };

            _jobHandler.Completed += (x, e) =>
            {
                CompleteJob();
            };

            _jobHandler.Canceled += (x, y) =>
            {
                //Finally Canceled..
            };
        }

        private void UpdateEstimatedDuration()
        {
            if (ActiveJob != null && SelectedProcessParametersTable != null && SelectedProcessParametersTable.DyeingSpeed > 0)
            {
                EstimatedDuration = TimeSpan.FromSeconds(ActiveJob.Length / (SelectedProcessParametersTable.DyeingSpeed / 100d));
            }
        }

        private void SetSegmentBrushStopsLiquidVolumes(Segment segment)
        {
            if (!DesignMode && segment != null)
            {
                foreach (var stop in segment.BrushStops)
                {
                    stop.SetLiquidVolumes(SelectedMachine.Configuration, SelectedRML, SelectedProcessParametersTable);
                }
            }
        }

        /// <summary>
        /// Saves the liquid factors.
        /// </summary>
        private async void SaveLiquidFactors()
        {
            if (SelectedRML != null)
            {
                using (_notification.PushTaskItem("Saving Liquid Factors..."))
                {
                    await SelectedRML.SaveAsync();
                    InvalidateLiquidFactorsAndProcessTables();
                }
            }
        }

        /// <summary>
        /// Navigates to the DB Module in order to edit the selected RML.
        /// </summary>
        private void EditRML()
        {
            ApplicationManager.RequestModule("Data Base", SelectedRML);
        }

        /// <summary>
        /// Navigates to the Machine Designer Module in order to edit the selected machine.
        /// </summary>
        private void EditMachine()
        {
            ApplicationManager.RequestModule("Machine Designer", SelectedMachine);
        }

        /// <summary>
        /// Saves the process parameters group.
        /// </summary>
        private async void SaveProcessParameters()
        {
            var response = _notification.ShowTextInput("Enter Group Name", "Group Name");

            if (response == null) return;

            using (_notification.PushTaskItem("Saving Parameters Group..."))
            {
                ProcessParametersTablesGroup group = new ProcessParametersTablesGroup();

                List<ProcessParametersTable> tables = new List<ProcessParametersTable>();
                foreach (var table in RmlProcessParametersTableGroup.ProcessParametersTables)
                {
                    var newTable = table.CloneEntity();
                    newTable.ProcessParametersTablesGroup = group;
                    tables.Add(newTable);
                }

                group.Active = true;
                group.ProcessParametersTables = tables.ToObservableCollection();
                group.Rml = SelectedRML;
                group.Name = response;
                group.SaveDate = DateTime.UtcNow;

                foreach (var g in SelectedRML.ProcessParametersTablesGroups)
                {
                    g.Active = false;
                }

                SelectedRML.ProcessParametersTablesGroups.Add(group);
                await SelectedRML.SaveAsync();

                InvalidateLiquidFactorsAndProcessTables();
            }
        }

        /// <summary>
        /// Invalidates the liquid factors and process parameters tables.
        /// </summary>
        private void InvalidateLiquidFactorsAndProcessTables()
        {
            if (SelectedRML != null && SelectedMachine != null)
            {
                LiquidTypesRmls = SelectedMachine.Configuration.IdsPacks.OrderBy(x => x.PackIndex).Select(x => x.LiquidType).SelectMany(x => x.LiquidTypesRmls).Where(x => x.Rml.Guid == SelectedRML.Guid).ToList();
                RmlProcessParametersTableGroup = SelectedRML.ProcessParametersTablesGroups.ToList().SingleOrDefault(x => x.Active);

                _selectedGroupHistory = RmlProcessParametersTableGroup;

                if (RmlProcessParametersTableGroup != null)
                {
                    RmlProcessParametersTableGroup = RmlProcessParametersTableGroup.CloneGroup();
                    RmlProcessParametersTableGroup.ProcessParametersTables = RmlProcessParametersTableGroup.ProcessParametersTables.OrderBy(x => x.TableIndex).ToObservableCollection();
                }

                GroupsHistory = SelectedRML.ProcessParametersTablesGroups.OrderByDescending(x => x.SaveDate).OrderBy(x => !x.Active).ToObservableCollection();

                RaisePropertyChangedAuto(nameof(SelectedGroupHistory));
            }
        }

        private List<Segment> CreateRunningJobEffectiveSegments(Job job)
        {
            List<Segment> segments = new List<Segment>();
            foreach (var s in job.Segments)
            {
                s.Completed = false;
                s.Started = false;
                segments.Add(s);

                if (job.EnableInterSegment && job.Segments.IndexOf(s) != job.Segments.Count - 1)
                {
                    segments.Add(new Segment()
                    {
                        Length = job.InterSegmentLength,
                        BrushStops = new System.Collections.ObjectModel.ObservableCollection<BrushStop>()
                            {
                                new BrushStop()
                                {
                                     Color = Colors.White,
                                }
                            },
                        Started = false,
                        Completed = false
                    });
                }
            }

            return segments;
        }

        #endregion

        #region Add / Remove / Duplicate Jobs, Segments & Brush Stops

        private void ArrangeSegmentsIndices()
        {
            int index = 1;

            foreach (var segment in ActiveJob.Segments.OrderBy(x => x.SegmentIndex))
            {
                segment.SegmentIndex = index++;
            }

            SegmentsCollectionView.Refresh();
        }

        private void ArrangeBrushStopsIndices()
        {
            int index = 0;

            foreach (var stop in SelectedSegment.BrushStops.OrderBy(x => x.StopIndex))
            {
                stop.SetStopIndex(index++);
            }

            if (SelectedSegment.BrushStops.Count > 1)
            {
                SelectedSegment.BrushStops.OrderBy(x => x.StopIndex).First().OffsetPercent = 0;
                SelectedSegment.BrushStops.OrderBy(x => x.StopIndex).Last().OffsetPercent = 100;
            }

            foreach (var stop in SelectedSegment.BrushStops.OrderBy(x => x.StopIndex))
            {
                stop.RaiseStopIndex();
                stop.RaiseOffsetChanged();
            }

            BrushStopsCollectionView.Refresh();
        }

        /// <summary>
        /// Removes the selected segments.
        /// </summary>
        private void RemoveSelectedSegments()
        {
            if (ActiveJob != null && SelectedSegment != null)
            {
                if (_notification.ShowQuestion("Are you sure you want to delete the selected segments?"))
                {
                    SelectedSegments.ToList().ForEach(x =>
                    {
                        ActiveJob.Segments.Remove(x);
                        x.DefferedDelete(_dbJobContext);
                    });

                    ArrangeSegmentsIndices();
                }
            }
        }

        /// <summary>
        /// Adds a new segment.
        /// </summary>
        private void AddSegment()
        {
            if (ActiveJob != null)
            {
                Segment seg = new Segment();
                seg.Name = "Untitled Segment";
                seg.Length = 10;

                if (ActiveJob.Segments.Count > 0)
                {
                    seg.SegmentIndex = ActiveJob.Segments.Max(x => x.SegmentIndex) + 1;
                }
                else
                {
                    seg.SegmentIndex = 1;
                }
                ActiveJob.Segments.Add(seg);
                SelectedSegment = seg;
                AddBrushStop();
                ArrangeSegmentsIndices();
            }
        }

        /// <summary>
        /// Removes the selected jobs.
        /// </summary>
        private async void RemoveSelectedJobs()
        {
            if (SelectedMachine != null && SelectedMachineJob != null)
            {
                if (_notification.ShowQuestion("Are you sure you want to delete the selected jobs?"))
                {
                    SelectedJobs.ToList().ForEach(x =>
                    {
                        SelectedMachine.Jobs.Remove(x);
                        x.DefferedDelete(_machineDBContext);
                    });

                    using (_notification.PushTaskItem("Removing selected jobs..."))
                    {
                        await SelectedMachine.SaveAsync(_machineDBContext);
                    }
                }
            }
        }

        /// <summary>
        /// Adds a new job to the selected machine.
        /// </summary>
        private async void AddJob()
        {
            if (SelectedMachine != null)
            {
                String jobName = _notification.ShowTextInput("Please provide a job name", "Name");

                if (!String.IsNullOrWhiteSpace(jobName))
                {
                    Job newJob = new Job();
                    newJob.Name = jobName;
                    newJob.CreationDate = DateTime.UtcNow;
                    newJob.User = _authentication.CurrentUser;
                    newJob.Rml = _machineDBContext.Rmls.FirstOrDefault();
                    newJob.WindingMethod = _machineDBContext.WindingMethods.FirstOrDefault();
                    newJob.Machine = SelectedMachine;

                    SelectedMachine.Jobs.Add(newJob);
                    await SelectedMachine.SaveAsync(_machineDBContext);
                    SelectedMachineJob = newJob;
                    LoadJob();
                    AddSegment();
                }
            }
        }

        /// <summary>
        /// Removes the selected brush stop.
        /// </summary>
        private void RemoveSelectedBrushStops()
        {
            if (SelectedBrushStop != null && SelectedSegment != null)
            {
                if (_notification.ShowQuestion("Are you sure you want to delete the selected colors?"))
                {
                    SelectedBrushStops.ToList().ForEach(x =>
                    {
                        SelectedSegment.BrushStops.Remove(x);
                        x.DefferedDelete(_dbJobContext);
                    });

                    ArrangeBrushStopsIndices();
                }
            }
        }

        /// <summary>
        /// Adds a new brush stop to the selected segment.
        /// </summary>
        private void AddBrushStop()
        {
            if (SelectedSegment != null)
            {
                var stop = new BrushStop();

                if (SelectedSegment.BrushStops.Count > 0)
                {
                    stop.StopIndex = SelectedSegment.BrushStops.Max(x => x.StopIndex) + 1;
                }
                else
                {
                    stop.StopIndex = 0;
                }

                stop.OffsetPercent = 100;
                stop.Segment = SelectedSegment;
                stop.ColorSpace = _dbJobContext.ColorSpaces.FirstOrDefault();
                stop.Color = Colors.Black;
                stop.SetLiquidVolumes(SelectedMachine.Configuration, SelectedRML, SelectedProcessParametersTable);
                SelectedSegment.BrushStops.Add(stop);
                SelectedSegment.BrushStops.ToList().ForEach(x => x.RaiseOffsetChanged());
                ArrangeBrushStopsIndices();
            }
        }

        /// <summary>
        /// Duplicates the selected brush stops.
        /// </summary>
        private void DuplicateSelectedBrushStops()
        {
            foreach (var stop in SelectedBrushStops.OrderBy(x => x.StopIndex))
            {
                var cloned = stop.Clone();
                cloned.StopIndex = SelectedSegment.BrushStops.Max(x => x.StopIndex) + 1;
                SelectedSegment.BrushStops.Add(cloned);
            }

            ArrangeBrushStopsIndices();
        }

        /// <summary>
        /// Duplicates the selected segments.
        /// </summary>
        private void DuplicateSelectedSegments()
        {
            foreach (var segment in SelectedSegments.OrderBy(x => x.SegmentIndex))
            {
                var cloned = segment.Clone();
                cloned.SegmentIndex = ActiveJob.Segments.Max(x => x.SegmentIndex) + 1;
                ActiveJob.Segments.Add(cloned);
            }

            ArrangeSegmentsIndices();
        }

        /// <summary>
        /// Duplicates the selected jobs.
        /// </summary>
        private async void DuplicateSelectedJobs()
        {
            if (SelectedMachineJob != null)
            {
                using (_notification.PushTaskItem("Cloning selected jobs..."))
                {
                    int index = SelectedMachine.Jobs.Max(x => x.JobIndex);

                    foreach (var job in SelectedJobs)
                    {
                        var cloned = job.Clone();
                        cloned.JobIndex = ++index;
                        SelectedMachine.Jobs.Add(cloned);
                    }

                    await SelectedMachine.SaveAsync(_machineDBContext);
                }
            }
        }

        #endregion

        #region Override Methods

        protected override void RaisePropertyChangedAuto([CallerMemberName] string caller = null)
        {
            base.RaisePropertyChangedAuto(caller);

            if (!_blockInvalidateCommands)
            {
                InvalidateRelayCommands();
            }
        }

        #endregion

        #region Public Methods

        /// <summary>
        /// Switch the brush stop position in the segment.
        /// </summary>
        /// <param name="draggedStop">The dragged stop.</param>
        /// <param name="droppedStop">The dropped stop.</param>
        public void OnDropBrushStop(BrushStop draggedStop, BrushStop droppedStop)
        {
            draggedStop.SetStopIndex(droppedStop.StopIndex);
            droppedStop.SetStopIndex(droppedStop.StopIndex + 1);
            ArrangeBrushStopsIndices();
        }

        #endregion

        #region IShutdownRequestBlocker

        public Task<bool> OnShutdownRequest()
        {
            if (IsJobRunning)
            {
                InvokeUI(() =>
                {
                    _notification.ShowWarning("Please stop the currently running job before closing the developer module.");
                });

                return Task.FromResult(false);
            }

            SettingsManager.Default.MachineStudio.DeveloperModule.LastSelectedMachineGuid = SelectedMachine != null ? SelectedMachine.Guid : null;
            SettingsManager.Default.MachineStudio.DeveloperModule.LastSelectedJobGuid = ActiveJob != null ? ActiveJob.Guid : null;

            return Task.FromResult(true);
        }

        #endregion

        #region IMainView

        //protected override void OnViewAttached()
        //{
        //    base.OnViewAttached();

        //    //if (SettingsManager.Default.MachineStudio.DeveloperModule.LastSelectedMachineGuid != null)
        //    //{
        //    //    SelectedMachine = Adapter.Machines.SingleOrDefault(x => x.Guid == SettingsManager.Default.MachineStudio.DeveloperModule.LastSelectedMachineGuid);
        //    //}

        //    //if (SettingsManager.Default.MachineStudio.DeveloperModule.LastSelectedJobGuid != null && SelectedMachine != null)
        //    //{
        //    //    ActiveJob = SelectedMachine.Jobs.SingleOrDefault(x => x.Guid == SettingsManager.Default.MachineStudio.DeveloperModule.LastSelectedJobGuid);
        //    //}
        //}

        #endregion
    }
}