// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT License.

#pragma once


namespace CalculatorApp
{

    public ref class WindowFrameService sealed
    {
    public:
        Windows::UI::Xaml::Controls::Page^ GetCurrentPage();
        void SetNewFrame(_In_ Windows::UI::Xaml::Controls::Frame^ frame);

    internal:
        // createdByUs means any window that we create.
        // !createdByUs means the main window
        static WindowFrameService^ CreateNewWindowFrameService(_In_ Windows::UI::Xaml::Controls::Frame^ viewFrame,
                                                               bool createdByUs,
                                                               Platform::WeakReference parent);

        Windows::UI::Core::CoreDispatcher^ GetCoreDispatcher();
        int GetViewId();

        void RegisterOnWindowClosingHandler(std::function<void()> onWindowClosingHandler);
        concurrency::task<void> HandleViewRelease();

        // Throws InvalidArgumentException if a service is already registered with the specified id
        void RegisterRuntimeWindowService(Windows::UI::Xaml::Interop::TypeName serviceId, _In_opt_ Platform::Object^ service);

        // Returns false if no service was registered with the specified id
        bool RemoveRuntimeWindowService(Windows::UI::Xaml::Interop::TypeName serviceId);

        // Throws InvalidArgumentException if no service is registered with the specified id
        Platform::Object^ ResolveRuntimeWindowService(Windows::UI::Xaml::Interop::TypeName serviceId);

        // Returns nullptr if no service is registered with the specified id
        _Ret_maybenull_ Platform::Object^ TryResolveRuntimeWindowService(Windows::UI::Xaml::Interop::TypeName serviceId);

        Windows::UI::Xaml::Controls::Frame^ GetFrame();
        void InvokeWindowClosingHandlers();
    private:
        WindowFrameService(_In_ Windows::UI::Xaml::Controls::Frame^ viewFrame, Platform::WeakReference parent);
        void InitializeFrameService(bool createdByUs);

        void OnConsolidated(_In_ Windows::UI::ViewManagement::ApplicationView^ sender, _In_ Windows::UI::ViewManagement::ApplicationViewConsolidatedEventArgs^ e);
        void OnClosed(_In_ Windows::UI::Core::CoreWindow^ sender, _In_ Windows::UI::Core::CoreWindowEventArgs^ args);

        void LogOnViewClosed(_In_ Windows::UI::Core::CoreWindow^ coreWindow);

    private:
        Platform::Agile<Windows::UI::Core::CoreWindow^> m_currentWindow;
        Platform::Agile<Windows::UI::Core::CoreDispatcher^> m_coreDispatcher;
        Windows::UI::Xaml::Controls::Frame^ m_frame;
        int m_viewId;
        Platform::WeakReference m_parent;

        std::unordered_map<Platform::String^, Platform::Object^> m_runtimeServicesMap;
        std::vector<std::function<void()>> m_onWindowClosingHandlers;
    };
}