using System.Linq;
using TINK.View.Map;
using TINK.ViewModel.Map;
using Xamarin.Forms;

namespace TINK
{
	public static class BackdoorMethodHelpers
	{
		public static void DoTapPage(string stationId)
		{
			Serilog.Log.Information($"Request via backdoor to tap station {stationId}.");
			var currentPage = GetCurrentPage();
			var mapPageViewModel = (currentPage as MapPage)?.BindingContext as MapPageViewModel;
			if (mapPageViewModel == null)
			{
				Serilog.Log.Error($"Request via backdoor to tap station {stationId} aborted because current page is not of expected type {typeof(MapPage).Name}. Type detected is {currentPage.GetType().Name}.");
				return;
			}

			Serilog.Log.Information($"Invoking member to tap.");
			mapPageViewModel?.OnStationClicked(stationId);
		}

		/// <summary> Gets the current page assumed that app is master detail page.</summary>
		/// <returns></returns>
		static Page GetCurrentPage()
		{

#if USEFLYOUT
            return (Application.Current.MainPage as FlyoutPage)?.Detail.Navigation.NavigationStack.LastOrDefault();
#else
			return Shell.Current.CurrentPage;
#endif
		}

	}
}