using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Tango.Integration.Emergency;
using Tango.PPC.Common;
using Tango.PPC.Common.Navigation;

namespace Tango.PPC.UI.ViewModels
{
    public class EmergencyViewVM : PPCViewModel
    {
        private bool _isActive;

        public override void OnApplicationStarted()
        {

        }

        public override void OnApplicationReady()
        {
            base.OnApplicationReady();
            MachineProvider.MachineOperator.EmergencyNotificationProvider.StatusChanged += EmergencyNotificationProvider_StatusChanged;
        }

        private void EmergencyNotificationProvider_StatusChanged(object sender, EmergencyStatusChangedEventArgs e)
        {
            InvokeUI(async () =>
            {
                if (e.Status == EmergencyStatus.On && !_isActive)
                {
                    LogManager.Log("Emergency switch activated...");
                    _isActive = true;
                    await NavigationManager.NavigateTo(NavigationView.EmergencyView);
                }
                else if (_isActive)
                {
                    LogManager.Log("Emergency switch deactivated...");
                    _isActive = false;
                    await NavigationManager.NavigateTo(NavigationView.LayoutView);
                }

                if (e.Status == EmergencyStatus.Error && e.ErrorException != null)
                {
                    LogManager.Log(e.ErrorException, "Error occurred while detecting emergency switch.");
                }
            });
        }
    }
}