//
// App.xaml.cpp
// Implementation of the App class.
//

#include "pch.h"
#include "MainPage.xaml.h"

using namespace HelloWorldCPlusPlus;

using namespace Platform;
using namespace Windows::ApplicationModel;
using namespace Windows::ApplicationModel::Activation;
using namespace Windows::Foundation;
using namespace Windows::Foundation::Collections;
using namespace Windows::UI::Xaml;
using namespace Windows::UI::Xaml::Controls;
using namespace Windows::UI::Xaml::Controls::Primitives;
using namespace Windows::UI::Xaml::Data;
using namespace Windows::UI::Xaml::Input;
using namespace Windows::UI::Xaml::Interop;
using namespace Windows::UI::Xaml::Media;
using namespace Windows::UI::Xaml::Navigation;

// The Blank Application template is documented at http://go.microsoft.com/fwlink/?LinkId=234227

/// <summary>
/// Initializes the singleton application object.  This is the first line of authored code
/// executed, and as such is the logical equivalent of main() or WinMain().
/// </summary>
App::App()
{
	InitializeComponent();
	Suspending += ref new SuspendingEventHandler(this, &App::OnSuspending);
}

/// <summary>
/// Invoked when the application is launched normally by the end user.  Other entry points
/// will be used when the application is launched to open a specific file, to display
/// search results, and so forth.
/// </summary>
/// <param name="pArgs">Details about the launch request and process.</param>
void App::OnLaunched(Windows::ApplicationModel::Activation::LaunchActivatedEventArgs^ pArgs)
{
	// Do not repeat app initialization when already running, just ensure that
	// the window is active
	if (pArgs->PreviousExecutionState == ApplicationExecutionState::Running)
	{
		Window::Current->Activate();
		return;
	}

	if (pArgs->PreviousExecutionState == ApplicationExecutionState::Terminated)
	{
		//TODO: Load state from previously suspended application
	}

	// Create a Frame to act navigation context and navigate to the first page
	auto rootFrame = ref new Frame();
	if (!rootFrame->Navigate(TypeName(MainPage::typeid)))
	{
		throw ref new FailureException("Failed to create initial page");
	}

	// Place the frame in the current Window and ensure that it is active
	Window::Current->Content = rootFrame;
	Window::Current->Activate();
}

/// <summary>
/// Invoked when application execution is being suspended.  Application state is saved
/// without knowing whether the application will be terminated or resumed with the contents
/// of memory still intact.
/// </summary>
/// <param name="sender">The source of the suspend request.</param>
/// <param name="e">Details about the suspend request.</param>
void App::OnSuspending(Object^ sender, SuspendingEventArgs^ e)
{
	(void) sender;	// Unused parameter
	(void) e;	// Unused parameter

	//TODO: Save application state and stop any background activity
}
