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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Tango.BL.Entities;
using Tango.Core.Commands;
using Tango.Integration.Operation;
using Tango.PPC.Common;

namespace Tango.PPC.UI.ViewModels
{
    public class MachineStatusViewVM : PPCViewModel
    {
        private JobHandler _handler;

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

        private RunningJobStatus _runningJobStatus;
        /// <summary>
        /// Gets or sets the running job status.
        /// </summary>
        public RunningJobStatus RunningJobStatus
        {
            get { return _runningJobStatus; }
            set { _runningJobStatus = value; RaisePropertyChangedAuto(); }
        }

        public RelayCommand StopCommand { get; set; }

        public MachineStatusViewVM()
        {
            StopCommand = new RelayCommand(StopJob);
        }

        public override void OnApplicationStarted()
        {
            MachineProvider.MachineOperator.PrintingStarted += MachineOperator_PrintingStarted;
        }

        private void MachineOperator_PrintingStarted(object sender, PrintingEventArgs e)
        {
            _handler = e.JobHandler;
            Job = e.Job;
            e.JobHandler.StatusChanged += JobHandler_StatusChanged;
            //e.JobHandler.SpoolChangeRequired += JobHandler_SpoolChangeRequired;
            e.JobHandler.Stopped += JobHandler_Stopped;
            //e.JobHandler.CanCancelChanged += JobHandler_CanCancelChanged;
        }

        private void JobHandler_Stopped(object sender, EventArgs e)
        {
            if (_handler != null)
            {
                _handler.StatusChanged -= JobHandler_StatusChanged;
                //_handler.SpoolChangeRequired -= JobHandler_SpoolChangeRequired;
                _handler.Stopped -= JobHandler_Stopped;
            }
        }

        private void JobHandler_StatusChanged(object sender, RunningJobStatus e)
        {
            InvokeUI(() =>
            {
                RunningJobStatus = e;
            });
        }

        #region Public Methods

        /// <summary>
        /// Toggles the application technician mode.
        /// </summary>
        public void ToggleTechnicianMode()
        {
            if (!ApplicationManager.IsInTechnicianMode)
            {
                ApplicationManager.EnterTechnicianMode();
            }
            else
            {
                ApplicationManager.ExitTechnicianMode();
            }
        }

        private void StopJob()
        {
            _handler?.Cancel();
        }

        #endregion
    }
}