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using System;
using System.Collections.Generic;
using System.Diagnostics;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using Tango.Core.Commands;
using Tango.Integration.Operation;
using Tango.PMR.Power;
using Tango.PPC.Common;
using Tango.PPC.UI.AppBarItems;
using Tango.PPC.UI.Views;
namespace Tango.PPC.UI.ViewModels
{
public class PowerOffViewVM : PPCViewModel
{
private PowerDownHandler _handler;
private PowerOffAppBarItem _appBarItem;
private int _abortTries;
private StartPowerDownResponse _status;
public StartPowerDownResponse Status
{
get { return _status; }
set { _status = value; RaisePropertyChangedAuto(); }
}
public RelayCommand AbortCommand { get; set; }
public PowerOffViewVM()
{
_appBarItem = new PowerOffAppBarItem();
_appBarItem.Pressed += (x, e) =>
{
NavigationManager.NavigateTo<InternalModule>(nameof(PowerOffView));
};
AbortCommand = new RelayCommand(AbortPowerOff);
}
public override void OnApplicationStarted()
{
}
public override void OnApplicationReady()
{
base.OnApplicationReady();
MachineProvider.MachineOperator.PowerDownStarted += MachineOperator_PowerDownStarted;
}
private void MachineOperator_PowerDownStarted(object sender, PowerDownStartedEventArgs e)
{
_abortTries = 0;
_handler = e.Handler;
_handler.StatusChanged += OnStatusChanged;
_handler.Failed += OnFailed;
_handler.Completed += OnCompleted;
InvokeUI(async () =>
{
await NavigationManager.NavigateTo<InternalModule>(nameof(PowerOffView));
NotificationProvider.PushAppBarItem(_appBarItem);
});
}
private void OnStatusChanged(object sender, PowerDownStatusChangedEventArgs e)
{
Status = e.Status;
_appBarItem.Status = Status;
}
private void OnCompleted(object sender, EventArgs e)
{
InvokeUI(async () =>
{
if (IsVisible)
{
await NavigationManager.NavigateBack();
}
NotificationProvider.PopAppBarItem(_appBarItem);
});
}
private void OnFailed(object sender, Exception ex)
{
InvokeUI(async () =>
{
await NotificationProvider.ShowError($"An error occurred while powering off the machine.\n{ex.FlattenMessage()}");
if (IsVisible)
{
await NavigationManager.NavigateBack();
}
NotificationProvider.PopAppBarItem(_appBarItem);
});
}
private async void AbortPowerOff()
{
try
{
NotificationProvider.SetGlobalBusyMessage("Aborting machine power off...");
await _handler.Abort();
await NavigationManager.NavigateBack();
NotificationProvider.PopAppBarItem(_appBarItem);
}
catch (Exception ex)
{
_abortTries++;
LogManager.Log(ex, "Power down abort error.");
NotificationProvider.ReleaseGlobalBusyMessage();
await NotificationProvider.ShowError($"An error occurred while trying to abort the power off sequence.\n{ex.FlattenMessage()}");
if (_abortTries > 2)
{
if (IsVisible)
{
await NavigationManager.NavigateBack();
}
NotificationProvider.PopAppBarItem(_appBarItem);
}
}
finally
{
NotificationProvider.ReleaseGlobalBusyMessage();
}
}
}
}
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