using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
using Tango.Core.Threading;
using Tango.DAL.Observables;
using Tango.MachineStudio.Common.Modules;
using Tango.MachineStudio.Common.Navigation;
using Tango.MachineStudio.Common.Notifications;
using Tango.SharedUI;

namespace Tango.MachineStudio.UI.ViewModels
{
    public class LoadingViewVM : ViewModel
    {
        private INotificationProvider _notificationProvider;
        private INavigationManager _navigationManager;
        private IStudioModuleLoader _studioModuleLoader;

        public LoadingViewVM(INavigationManager navigationManager, IStudioModuleLoader studioModuleLoader, INotificationProvider notificationProvider)
        {
            _navigationManager = navigationManager;
            _studioModuleLoader = studioModuleLoader;
            _notificationProvider = notificationProvider;
            Load();
        }

        private void Load()
        {
            StaThreadHelper.StartStaThread(() =>
            {
                Thread.Sleep(3000);
                try
                {
                    ObservablesEntitiesAdapter.Instance.Initialize();
                    InvokeUI(() =>
                    {
                        _studioModuleLoader.LoadModules();
                        _navigationManager.NavigateTo(NavigationView.LoginView);
                    });
                }
                catch (Exception ex)
                {
                    InvokeUINow(() =>
                    {
                        if (_notificationProvider.ShowQuestion("An error occurred while trying to connect to Twine database." + Environment.NewLine + "Would you like to try again?"))
                        {
                            Load();
                        }
                        else
                        {
                            Environment.Exit(0);
                        }
                    });
                }
            });
        }
    }
}