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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.MachineStudio.Common.Notifications;

namespace Tango.MachineStudio.DB.ViewModels
{
    public class 
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Tango.Core.Commands;
using Tango.Core.DI;
using Tango.Integration.Operation;
using Tango.PPC.Common;
using Tango.PPC.Common.Modules;
using Tango.PPC.Common.Navigation;
using Tango.PPC.UI.ViewsContracts;
using Tango.SharedUI;

namespace Tango.PPC.UI.ViewModels
{
    /// <summary>
    /// Represents the layout view containing the main menu and all modules.
    /// </summary>
    /// <seealso cref="Tango.PPC.Common.PPCViewModel{Tango.PPC.UI.ViewsContracts.ILayoutView}" />
    public class LayoutViewVM : PPCViewModel<ILayoutView>
    {
        private JobHandler _jobHandler;

        /// <summary>
        /// Gets or sets the module loader.
        /// </summary>
        [TangoInject]
        public IPPCModuleLoader ModuleLoader { get; set; }

        #region Properties

        private bool _isMenuOpened;
        /// <summary>
        /// Gets or sets a value indicating whether the side menu is opened.
        /// </summary>
        public bool IsMenuOpened
        {
            get { return _isMenuOpened; }
            set { _isMenuOpened = value; RaisePropertyChangedAuto(); }
        }

        private bool _isNotificationsOpened;
        /// <summary>
        /// Gets or sets a value indicating whether to display all notifications.
        /// </summary>
        public bool IsNotificationsOpened
        {
            get { return _isNotificationsOpened; }
            set { _isNotificationsOpened = value; RaisePropertyChangedAuto(); }
        }

        #endregion

        #region Commands

        /// <summary>
        /// Gets or sets the module navigation command.
        /// </summary>
        public RelayCommand<String> ModuleNavigationCommand { get; set; }

        /// <summary>
        /// Gets or sets the menu or back command.
        /// </summary>
        public RelayCommand MenuOrBackCommand { get; set; }

        /// <summary>
        /// Gets or sets the home command.
        /// </summary>
        public RelayCommand HomeCommand { get; set; }

        /// <summary>
        /// Gets or sets the notifications area pressed command.
        /// </summary>
        public RelayCommand NotificationsAreaPressedCommand { get; set; }

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

        /// <summary>
        /// Gets or sets the sign-out command.
        /// </summary>
        public RelayCommand SignOutCommand { get; set; }

        #endregion

        #region Constructors

        /// <summary>
        /// Initializes a new instance of the <see cref="LayoutViewVM"/> class.
        /// </summary>
        public LayoutViewVM()
        {
            ModuleNavigationCommand = new RelayCommand<string>(NavigateToModule);
            HomeCommand = new RelayCommand(NavigateHome);
            MenuOrBackCommand = new RelayCommand(OpenMenuOrNavigateBack);
            NotificationsAreaPressedCommand = new RelayCommand(OpenFirstNotificationOrDisplayAll);

            StopPrintingCommand = new RelayCommand(StopPrinting);
            SignOutCommand = new RelayCommand(SignOut);
        }

        #endregion

        #region Private Methods

        /// <summary>
        /// Stops the printing.
        /// </summary>
        private void StopPrinting()
        {
            LogManager.Log("Stop printing layout command pressed!");

            if (_jobHandler != null)
            {
                _jobHandler.Cancel();
            }
        }

        /// <summary>
        /// Opens the menu or navigate back.
        /// </summary>
        private void OpenMenuOrNavigateBack()
        {
            if (NavigationManager.CanNavigateBack)
            {
                LogManager.Log("Back command pressed.");
                NavigationManager.NavigateBack();
            }
            else
            {
                LogManager.Log("Menu command pressed.");
                IsMenuOpened = true;
            }
        }

        /// <summary>
        /// Handles the module navigation command.
        /// </summary>
        /// <param name="moduleName">Name of the module.</param>
        private void NavigateToModule(string moduleName)
        {
            LogManager.Log("Navigate to module command pressed.");
            IsMenuOpened = false;
            NavigationManager.NavigateTo(moduleName);
        }

        /// <summary>
        /// Handles the home command.
        /// </summary>
        private void NavigateHome()
        {
            LogManager.Log("Navigate home command pressed.");
            IsMenuOpened = false;
            NavigationManager.NavigateTo(NavigationView.HomeModule);
        }

        /// <summary>
        /// Represents an event that is raised when the sign-out operation is complete.
        /// </summary>
        private void SignOut()
        {
            LogManager.Log("SignOut command pressed.");
            AuthenticationProvider.LogOut();
            IsMenuOpened = false;
        }

        /// <summary>
        /// Opens the first notification or display all.
        /// </summary>
        private void OpenFirstNotificationOrDisplayAll()
        {
            if (NotificationProvider.NotificationItems.Count == 1)
            {
                //Open first
            }
            else
            {
                IsNotificationsOpened = true;
            }
        }

        #endregion

        #region Override Methods

        /// <summary>
        /// Called when the application has been started.
        /// </summary>
        public override void OnApplicationStarted()
        {
            base.OnApplicationStarted();
            ModuleLoader.ModulesLoaded += ModuleLoader_ModulesLoaded;
            MachineProvider.MachineOperator.PrintingStarted += MachineOperator_PrintingStarted;
        }

        /// <summary>
        /// Called when the instance of IPPCView is available.
        /// </summary>
        public override void OnViewAttached()
        {

        }

        #endregion

        #region Event Handlers

        /// <summary>
        /// Handles the PrintingStarted event of the MachineOperator.
        /// </summary>
        /// <param name="sender">The source of the event.</param>
        /// <param name="e">The <see cref="PrintingEventArgs"/> instance containing the event data.</param>
        private void MachineOperator_PrintingStarted(object sender, PrintingEventArgs e)
        {
            _jobHandler = e.JobHandler;
        }

        /// <summary>
        /// Handles the ModulesLoaded event of the ModuleLoader.
        /// </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 ModuleLoader_ModulesLoaded(object sender, EventArgs e)
        {
            LogManager.Log("Modules loaded. Applying modules to main navigation control...");
            View.ApplyModules(ModuleLoader.UserModules);
        }

        #endregion
    }
}