// Copyright (c) Microsoft Corporation
// All rights reserved. 
//
// Licensed under the Apache License, Version 2.0 (the ""License""); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0 
//
// THIS CODE IS PROVIDED ON AN  *AS IS* BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION ANY IMPLIED WARRANTIES OR CONDITIONS OF TITLE, FITNESS FOR A PARTICULAR PURPOSE, MERCHANTABLITY OR NON-INFRINGEMENT. 
//
// See the Apache Version 2.0 License for specific language governing permissions and limitations under the License.

// TODO: Verify that this is is still needed..
#define NTDDI_VERSION 0x06010000

#include <v8.h>
#include "nan.h"
#include <string>
#include <ppltasks.h>
#include "CollectionsConverter.h"
#include "CollectionsWrap.h"
#include "node-async.h"
#include "NodeRtUtils.h"
#include "OpaqueWrapper.h"
#include "WrapperBase.h"

#using <Windows.WinMD>

// this undefs fixes the issues of compiling Windows.Data.Json, Windows.Storag.FileProperties, and Windows.Stroage.Search
// Some of the node header files brings windows definitions with the same names as some of the WinRT methods
#undef DocumentProperties
#undef GetObject
#undef CreateEvent
#undef FindText
#undef SendMessage

const char* REGISTRATION_TOKEN_MAP_PROPERTY_NAME = "__registrationTokenMap__";

using v8::Array;
using v8::String;
using v8::Handle;
using v8::Value;
using v8::Boolean;
using v8::Integer;
using v8::FunctionTemplate;
using v8::Object;
using v8::Local;
using v8::Function;
using v8::Date;
using v8::Number;
using v8::PropertyAttribute;
using v8::Primitive;
using Nan::HandleScope;
using Nan::Persistent;
using Nan::Undefined;
using Nan::True;
using Nan::False;
using Nan::Null;
using Nan::MaybeLocal;
using Nan::EscapableHandleScope;
using Nan::HandleScope;
using Nan::TryCatch;
using namespace concurrency;

namespace NodeRT { namespace Windows { namespace Devices { namespace Gpio { 

  v8::Local<v8::Value> WrapGpioPinValueChangedEventArgs(::Windows::Devices::Gpio::GpioPinValueChangedEventArgs^ wintRtInstance);
  ::Windows::Devices::Gpio::GpioPinValueChangedEventArgs^ UnwrapGpioPinValueChangedEventArgs(Local<Value> value);
  
  v8::Local<v8::Value> WrapGpioPin(::Windows::Devices::Gpio::GpioPin^ wintRtInstance);
  ::Windows::Devices::Gpio::GpioPin^ UnwrapGpioPin(Local<Value> value);
  
  v8::Local<v8::Value> WrapGpioController(::Windows::Devices::Gpio::GpioController^ wintRtInstance);
  ::Windows::Devices::Gpio::GpioController^ UnwrapGpioController(Local<Value> value);
  


  static void InitGpioSharingModeEnum(const Local<Object> exports)
  {
    HandleScope scope;
    
	Local<Object> enumObject = Nan::New<Object>();
    Nan::Set(exports, Nan::New<String>("GpioSharingMode").ToLocalChecked(), enumObject);
	Nan::Set(enumObject, Nan::New<String>("exclusive").ToLocalChecked(), Nan::New<Integer>(static_cast<int>(::Windows::Devices::Gpio::GpioSharingMode::Exclusive)));
	Nan::Set(enumObject, Nan::New<String>("sharedReadOnly").ToLocalChecked(), Nan::New<Integer>(static_cast<int>(::Windows::Devices::Gpio::GpioSharingMode::SharedReadOnly)));
  }


  static void InitGpioOpenStatusEnum(const Local<Object> exports)
  {
    HandleScope scope;
    
	Local<Object> enumObject = Nan::New<Object>();
    Nan::Set(exports, Nan::New<String>("GpioOpenStatus").ToLocalChecked(), enumObject);
	Nan::Set(enumObject, Nan::New<String>("pinOpened").ToLocalChecked(), Nan::New<Integer>(static_cast<int>(::Windows::Devices::Gpio::GpioOpenStatus::PinOpened)));
	Nan::Set(enumObject, Nan::New<String>("pinUnavailable").ToLocalChecked(), Nan::New<Integer>(static_cast<int>(::Windows::Devices::Gpio::GpioOpenStatus::PinUnavailable)));
	Nan::Set(enumObject, Nan::New<String>("sharingViolation").ToLocalChecked(), Nan::New<Integer>(static_cast<int>(::Windows::Devices::Gpio::GpioOpenStatus::SharingViolation)));
  }


  static void InitGpioPinDriveModeEnum(const Local<Object> exports)
  {
    HandleScope scope;
    
	Local<Object> enumObject = Nan::New<Object>();
    Nan::Set(exports, Nan::New<String>("GpioPinDriveMode").ToLocalChecked(), enumObject);
	Nan::Set(enumObject, Nan::New<String>("input").ToLocalChecked(), Nan::New<Integer>(static_cast<int>(::Windows::Devices::Gpio::GpioPinDriveMode::Input)));
	Nan::Set(enumObject, Nan::New<String>("output").ToLocalChecked(), Nan::New<Integer>(static_cast<int>(::Windows::Devices::Gpio::GpioPinDriveMode::Output)));
	Nan::Set(enumObject, Nan::New<String>("inputPullUp").ToLocalChecked(), Nan::New<Integer>(static_cast<int>(::Windows::Devices::Gpio::GpioPinDriveMode::InputPullUp)));
	Nan::Set(enumObject, Nan::New<String>("inputPullDown").ToLocalChecked(), Nan::New<Integer>(static_cast<int>(::Windows::Devices::Gpio::GpioPinDriveMode::InputPullDown)));
	Nan::Set(enumObject, Nan::New<String>("outputOpenDrain").ToLocalChecked(), Nan::New<Integer>(static_cast<int>(::Windows::Devices::Gpio::GpioPinDriveMode::OutputOpenDrain)));
	Nan::Set(enumObject, Nan::New<String>("outputOpenDrainPullUp").ToLocalChecked(), Nan::New<Integer>(static_cast<int>(::Windows::Devices::Gpio::GpioPinDriveMode::OutputOpenDrainPullUp)));
	Nan::Set(enumObject, Nan::New<String>("outputOpenSource").ToLocalChecked(), Nan::New<Integer>(static_cast<int>(::Windows::Devices::Gpio::GpioPinDriveMode::OutputOpenSource)));
	Nan::Set(enumObject, Nan::New<String>("outputOpenSourcePullDown").ToLocalChecked(), Nan::New<Integer>(static_cast<int>(::Windows::Devices::Gpio::GpioPinDriveMode::OutputOpenSourcePullDown)));
  }


  static void InitGpioPinValueEnum(const Local<Object> exports)
  {
    HandleScope scope;
    
	Local<Object> enumObject = Nan::New<Object>();
    Nan::Set(exports, Nan::New<String>("GpioPinValue").ToLocalChecked(), enumObject);
	Nan::Set(enumObject, Nan::New<String>("low").ToLocalChecked(), Nan::New<Integer>(static_cast<int>(::Windows::Devices::Gpio::GpioPinValue::Low)));
	Nan::Set(enumObject, Nan::New<String>("high").ToLocalChecked(), Nan::New<Integer>(static_cast<int>(::Windows::Devices::Gpio::GpioPinValue::High)));
  }


  static void InitGpioPinEdgeEnum(const Local<Object> exports)
  {
    HandleScope scope;
    
	Local<Object> enumObject = Nan::New<Object>();
    Nan::Set(exports, Nan::New<String>("GpioPinEdge").ToLocalChecked(), enumObject);
	Nan::Set(enumObject, Nan::New<String>("fallingEdge").ToLocalChecked(), Nan::New<Integer>(static_cast<int>(::Windows::Devices::Gpio::GpioPinEdge::FallingEdge)));
	Nan::Set(enumObject, Nan::New<String>("risingEdge").ToLocalChecked(), Nan::New<Integer>(static_cast<int>(::Windows::Devices::Gpio::GpioPinEdge::RisingEdge)));
  }



  
  class GpioPinValueChangedEventArgs : public WrapperBase
  {
  public:    
    static void Init(const Local<Object> exports)
    {
      HandleScope scope;
      
      Local<FunctionTemplate> localRef = Nan::New<FunctionTemplate>(New);
      s_constructorTemplate.Reset(localRef);
      localRef->SetClassName(Nan::New<String>("GpioPinValueChangedEventArgs").ToLocalChecked());
      localRef->InstanceTemplate()->SetInternalFieldCount(1);
      
                              
      Nan::SetAccessor(localRef->PrototypeTemplate(), Nan::New<String>("edge").ToLocalChecked(), EdgeGetter);
      
      Local<Object> constructor = Nan::To<Object>(Nan::GetFunction(localRef).ToLocalChecked()).ToLocalChecked();
	  Nan::SetMethod(constructor, "castFrom", CastFrom);


      Nan::Set(exports, Nan::New<String>("GpioPinValueChangedEventArgs").ToLocalChecked(), constructor);
    }


    virtual ::Platform::Object^ GetObjectInstance() const override
    {
      return _instance;
    }

  private:
    
    GpioPinValueChangedEventArgs(::Windows::Devices::Gpio::GpioPinValueChangedEventArgs^ instance)
    {
      _instance = instance;
    }
    
    
    static void New(Nan::NAN_METHOD_ARGS_TYPE info)
    {
      HandleScope scope;

	    Local<FunctionTemplate> localRef = Nan::New<FunctionTemplate>(s_constructorTemplate);

      // in case the constructor was called without the new operator
      if (!localRef->HasInstance(info.This()))
      {
        if (info.Length() > 0)
        {
          std::unique_ptr<Local<Value> []> constructorArgs(new Local<Value>[info.Length()]);

          Local<Value> *argsPtr = constructorArgs.get();
          for (int i = 0; i < info.Length(); i++)
          {
            argsPtr[i] = info[i];
          }

		  MaybeLocal<Object> res = Nan::NewInstance(Nan::GetFunction(localRef).ToLocalChecked(), info.Length(), constructorArgs.get());
		  if (res.IsEmpty())
		  {
			  return;
		  }
		  info.GetReturnValue().Set(res.ToLocalChecked());
		  return;
		}
		else
		{
          MaybeLocal<Object> res = Nan::NewInstance(Nan::GetFunction(localRef).ToLocalChecked(), info.Length(), nullptr);
          if (res.IsEmpty())
          {
            return;
          }
          info.GetReturnValue().Set(res.ToLocalChecked());
          return;
        }
      }
      
      ::Windows::Devices::Gpio::GpioPinValueChangedEventArgs^ winRtInstance;


      if (info.Length() == 1 && OpaqueWrapper::IsOpaqueWrapper(info[0]) &&
        NodeRT::Utils::IsWinRtWrapperOf<::Windows::Devices::Gpio::GpioPinValueChangedEventArgs^>(info[0]))
      {
        try 
        {
          winRtInstance = (::Windows::Devices::Gpio::GpioPinValueChangedEventArgs^) NodeRT::Utils::GetObjectInstance(info[0]);
        }
        catch (Platform::Exception ^exception)
        {
          NodeRT::Utils::ThrowWinRtExceptionInJs(exception);
          return;
        }
      }
      else
      {
        Nan::ThrowError(Nan::Error(NodeRT::Utils::NewString(L"Invalid arguments, no suitable constructor found")));
	    	return;
      }

      NodeRT::Utils::SetHiddenValue(info.This(), Nan::New<String>("__winRtInstance__").ToLocalChecked(), True());

      GpioPinValueChangedEventArgs *wrapperInstance = new GpioPinValueChangedEventArgs(winRtInstance);
      wrapperInstance->Wrap(info.This());

      info.GetReturnValue().Set(info.This());
    }


	
    static void CastFrom(Nan::NAN_METHOD_ARGS_TYPE info)
    {
		HandleScope scope;
		if (info.Length() < 1 || !NodeRT::Utils::IsWinRtWrapperOf<::Windows::Devices::Gpio::GpioPinValueChangedEventArgs^>(info[0]))
		{
			Nan::ThrowError(Nan::Error(NodeRT::Utils::NewString(L"Invalid arguments, no object provided, or given object could not be casted to requested type")));
			return;
		}

		::Windows::Devices::Gpio::GpioPinValueChangedEventArgs^ winRtInstance;
		try
		{
			winRtInstance = (::Windows::Devices::Gpio::GpioPinValueChangedEventArgs^) NodeRT::Utils::GetObjectInstance(info[0]);
		}
		catch (Platform::Exception ^exception)
		{
			NodeRT::Utils::ThrowWinRtExceptionInJs(exception);
			return;
		}

		info.GetReturnValue().Set(WrapGpioPinValueChangedEventArgs(winRtInstance));
    }


  



    static void EdgeGetter(Local<String> property, const Nan::PropertyCallbackInfo<v8::Value> &info)
    {
      HandleScope scope;
      
      if (!NodeRT::Utils::IsWinRtWrapperOf<::Windows::Devices::Gpio::GpioPinValueChangedEventArgs^>(info.This()))
      {
        return;
      }

      GpioPinValueChangedEventArgs *wrapper = GpioPinValueChangedEventArgs::Unwrap<GpioPinValueChangedEventArgs>(info.This());

      try 
      {
        ::Windows::Devices::Gpio::GpioPinEdge result = wrapper->_instance->Edge;
        info.GetReturnValue().Set(Nan::New<Integer>(static_cast<int>(result)));
        return;
      }
      catch (Platform::Exception ^exception)
      {
        NodeRT::Utils::ThrowWinRtExceptionInJs(exception);
        return;
      }
    }
    


  private:
    ::Windows::Devices::Gpio::GpioPinValueChangedEventArgs^ _instance;
    static Persistent<FunctionTemplate> s_constructorTemplate;

    friend v8::Local<v8::Value> WrapGpioPinValueChangedEventArgs(::Windows::Devices::Gpio::GpioPinValueChangedEventArgs^ wintRtInstance);
    friend ::Windows::Devices::Gpio::GpioPinValueChangedEventArgs^ UnwrapGpioPinValueChangedEventArgs(Local<Value> value);
  };
  Persistent<FunctionTemplate> GpioPinValueChangedEventArgs::s_constructorTemplate;

  v8::Local<v8::Value> WrapGpioPinValueChangedEventArgs(::Windows::Devices::Gpio::GpioPinValueChangedEventArgs^ winRtInstance)
  {
    EscapableHandleScope scope;

    if (winRtInstance == nullptr)
    {
      return scope.Escape(Undefined());
    }

    Local<Value> opaqueWrapper = CreateOpaqueWrapper(winRtInstance);
    Local<Value> args[] = {opaqueWrapper};
    Local<FunctionTemplate> localRef = Nan::New<FunctionTemplate>(GpioPinValueChangedEventArgs::s_constructorTemplate);
    return scope.Escape(Nan::NewInstance(Nan::GetFunction(localRef).ToLocalChecked(),_countof(args), args).ToLocalChecked());
  }

  ::Windows::Devices::Gpio::GpioPinValueChangedEventArgs^ UnwrapGpioPinValueChangedEventArgs(Local<Value> value)
  {
     return GpioPinValueChangedEventArgs::Unwrap<GpioPinValueChangedEventArgs>(Nan::To<Object>(value).ToLocalChecked())->_instance;
  }

  void InitGpioPinValueChangedEventArgs(Local<Object> exports)
  {
    GpioPinValueChangedEventArgs::Init(exports);
  }

  class GpioPin : public WrapperBase
  {
  public:    
    static void Init(const Local<Object> exports)
    {
      HandleScope scope;
      
      Local<FunctionTemplate> localRef = Nan::New<FunctionTemplate>(New);
      s_constructorTemplate.Reset(localRef);
      localRef->SetClassName(Nan::New<String>("GpioPin").ToLocalChecked());
      localRef->InstanceTemplate()->SetInternalFieldCount(1);
      
            
      Nan::SetPrototypeMethod(localRef, "isDriveModeSupported", IsDriveModeSupported);
      Nan::SetPrototypeMethod(localRef, "getDriveMode", GetDriveMode);
      Nan::SetPrototypeMethod(localRef, "setDriveMode", SetDriveMode);
      Nan::SetPrototypeMethod(localRef, "write", Write);
      Nan::SetPrototypeMethod(localRef, "read", Read);
      Nan::SetPrototypeMethod(localRef, "close", Close);
      
                  
      Nan::SetPrototypeMethod(localRef,"addListener", AddListener);
      Nan::SetPrototypeMethod(localRef,"on", AddListener);
      Nan::SetPrototypeMethod(localRef,"removeListener", RemoveListener);
      Nan::SetPrototypeMethod(localRef, "off", RemoveListener);
            
      Nan::SetAccessor(localRef->PrototypeTemplate(), Nan::New<String>("debounceTimeout").ToLocalChecked(), DebounceTimeoutGetter, DebounceTimeoutSetter);
      Nan::SetAccessor(localRef->PrototypeTemplate(), Nan::New<String>("pinNumber").ToLocalChecked(), PinNumberGetter);
      Nan::SetAccessor(localRef->PrototypeTemplate(), Nan::New<String>("sharingMode").ToLocalChecked(), SharingModeGetter);
      
      Local<Object> constructor = Nan::To<Object>(Nan::GetFunction(localRef).ToLocalChecked()).ToLocalChecked();
	  Nan::SetMethod(constructor, "castFrom", CastFrom);


      Nan::Set(exports, Nan::New<String>("GpioPin").ToLocalChecked(), constructor);
    }


    virtual ::Platform::Object^ GetObjectInstance() const override
    {
      return _instance;
    }

  private:
    
    GpioPin(::Windows::Devices::Gpio::GpioPin^ instance)
    {
      _instance = instance;
    }
    
    
    static void New(Nan::NAN_METHOD_ARGS_TYPE info)
    {
      HandleScope scope;

	    Local<FunctionTemplate> localRef = Nan::New<FunctionTemplate>(s_constructorTemplate);

      // in case the constructor was called without the new operator
      if (!localRef->HasInstance(info.This()))
      {
        if (info.Length() > 0)
        {
          std::unique_ptr<Local<Value> []> constructorArgs(new Local<Value>[info.Length()]);

          Local<Value> *argsPtr = constructorArgs.get();
          for (int i = 0; i < info.Length(); i++)
          {
            argsPtr[i] = info[i];
          }

		  MaybeLocal<Object> res = Nan::NewInstance(Nan::GetFunction(localRef).ToLocalChecked(), info.Length(), constructorArgs.get());
		  if (res.IsEmpty())
		  {
			  return;
		  }
		  info.GetReturnValue().Set(res.ToLocalChecked());
		  return;
		}
		else
		{
          MaybeLocal<Object> res = Nan::NewInstance(Nan::GetFunction(localRef).ToLocalChecked(), info.Length(), nullptr);
          if (res.IsEmpty())
          {
            return;
          }
          info.GetReturnValue().Set(res.ToLocalChecked());
          return;
        }
      }
      
      ::Windows::Devices::Gpio::GpioPin^ winRtInstance;


      if (info.Length() == 1 && OpaqueWrapper::IsOpaqueWrapper(info[0]) &&
        NodeRT::Utils::IsWinRtWrapperOf<::Windows::Devices::Gpio::GpioPin^>(info[0]))
      {
        try 
        {
          winRtInstance = (::Windows::Devices::Gpio::GpioPin^) NodeRT::Utils::GetObjectInstance(info[0]);
        }
        catch (Platform::Exception ^exception)
        {
          NodeRT::Utils::ThrowWinRtExceptionInJs(exception);
          return;
        }
      }
      else
      {
        Nan::ThrowError(Nan::Error(NodeRT::Utils::NewString(L"Invalid arguments, no suitable constructor found")));
	    	return;
      }

      NodeRT::Utils::SetHiddenValue(info.This(), Nan::New<String>("__winRtInstance__").ToLocalChecked(), True());

      GpioPin *wrapperInstance = new GpioPin(winRtInstance);
      wrapperInstance->Wrap(info.This());

      info.GetReturnValue().Set(info.This());
    }


	
    static void CastFrom(Nan::NAN_METHOD_ARGS_TYPE info)
    {
		HandleScope scope;
		if (info.Length() < 1 || !NodeRT::Utils::IsWinRtWrapperOf<::Windows::Devices::Gpio::GpioPin^>(info[0]))
		{
			Nan::ThrowError(Nan::Error(NodeRT::Utils::NewString(L"Invalid arguments, no object provided, or given object could not be casted to requested type")));
			return;
		}

		::Windows::Devices::Gpio::GpioPin^ winRtInstance;
		try
		{
			winRtInstance = (::Windows::Devices::Gpio::GpioPin^) NodeRT::Utils::GetObjectInstance(info[0]);
		}
		catch (Platform::Exception ^exception)
		{
			NodeRT::Utils::ThrowWinRtExceptionInJs(exception);
			return;
		}

		info.GetReturnValue().Set(WrapGpioPin(winRtInstance));
    }


  
    static void IsDriveModeSupported(Nan::NAN_METHOD_ARGS_TYPE info)
    {
      HandleScope scope;

      if (!NodeRT::Utils::IsWinRtWrapperOf<::Windows::Devices::Gpio::GpioPin^>(info.This()))
      {
        return;
      }

      GpioPin *wrapper = GpioPin::Unwrap<GpioPin>(info.This());

      if (info.Length() == 1
        && info[0]->IsInt32())
      {
        try
        {
          ::Windows::Devices::Gpio::GpioPinDriveMode arg0 = static_cast<::Windows::Devices::Gpio::GpioPinDriveMode>(Nan::To<int32_t>(info[0]).FromMaybe(0));
          
          bool result;
          result = wrapper->_instance->IsDriveModeSupported(arg0);
          info.GetReturnValue().Set(Nan::New<Boolean>(result));
          return;
        }
        catch (Platform::Exception ^exception)
        {
          NodeRT::Utils::ThrowWinRtExceptionInJs(exception);
          return;
        }
      }
      else 
      {
        Nan::ThrowError(Nan::Error(NodeRT::Utils::NewString(L"Bad arguments: no suitable overload found")));
        return;
      }
    }
    static void GetDriveMode(Nan::NAN_METHOD_ARGS_TYPE info)
    {
      HandleScope scope;

      if (!NodeRT::Utils::IsWinRtWrapperOf<::Windows::Devices::Gpio::GpioPin^>(info.This()))
      {
        return;
      }

      GpioPin *wrapper = GpioPin::Unwrap<GpioPin>(info.This());

      if (info.Length() == 0)
      {
        try
        {
          ::Windows::Devices::Gpio::GpioPinDriveMode result;
          result = wrapper->_instance->GetDriveMode();
          info.GetReturnValue().Set(Nan::New<Integer>(static_cast<int>(result)));
          return;
        }
        catch (Platform::Exception ^exception)
        {
          NodeRT::Utils::ThrowWinRtExceptionInJs(exception);
          return;
        }
      }
      else 
      {
        Nan::ThrowError(Nan::Error(NodeRT::Utils::NewString(L"Bad arguments: no suitable overload found")));
        return;
      }
    }
    static void SetDriveMode(Nan::NAN_METHOD_ARGS_TYPE info)
    {
      HandleScope scope;

      if (!NodeRT::Utils::IsWinRtWrapperOf<::Windows::Devices::Gpio::GpioPin^>(info.This()))
      {
        return;
      }

      GpioPin *wrapper = GpioPin::Unwrap<GpioPin>(info.This());

      if (info.Length() == 1
        && info[0]->IsInt32())
      {
        try
        {
          ::Windows::Devices::Gpio::GpioPinDriveMode arg0 = static_cast<::Windows::Devices::Gpio::GpioPinDriveMode>(Nan::To<int32_t>(info[0]).FromMaybe(0));
          
          wrapper->_instance->SetDriveMode(arg0);
          return;   
        }
        catch (Platform::Exception ^exception)
        {
          NodeRT::Utils::ThrowWinRtExceptionInJs(exception);
          return;
        }
      }
      else 
      {
        Nan::ThrowError(Nan::Error(NodeRT::Utils::NewString(L"Bad arguments: no suitable overload found")));
        return;
      }
    }
    static void Write(Nan::NAN_METHOD_ARGS_TYPE info)
    {
      HandleScope scope;

      if (!NodeRT::Utils::IsWinRtWrapperOf<::Windows::Devices::Gpio::GpioPin^>(info.This()))
      {
        return;
      }

      GpioPin *wrapper = GpioPin::Unwrap<GpioPin>(info.This());

      if (info.Length() == 1
        && info[0]->IsInt32())
      {
        try
        {
          ::Windows::Devices::Gpio::GpioPinValue arg0 = static_cast<::Windows::Devices::Gpio::GpioPinValue>(Nan::To<int32_t>(info[0]).FromMaybe(0));
          
          wrapper->_instance->Write(arg0);
          return;   
        }
        catch (Platform::Exception ^exception)
        {
          NodeRT::Utils::ThrowWinRtExceptionInJs(exception);
          return;
        }
      }
      else 
      {
        Nan::ThrowError(Nan::Error(NodeRT::Utils::NewString(L"Bad arguments: no suitable overload found")));
        return;
      }
    }
    static void Read(Nan::NAN_METHOD_ARGS_TYPE info)
    {
      HandleScope scope;

      if (!NodeRT::Utils::IsWinRtWrapperOf<::Windows::Devices::Gpio::GpioPin^>(info.This()))
      {
        return;
      }

      GpioPin *wrapper = GpioPin::Unwrap<GpioPin>(info.This());

      if (info.Length() == 0)
      {
        try
        {
          ::Windows::Devices::Gpio::GpioPinValue result;
          result = wrapper->_instance->Read();
          info.GetReturnValue().Set(Nan::New<Integer>(static_cast<int>(result)));
          return;
        }
        catch (Platform::Exception ^exception)
        {
          NodeRT::Utils::ThrowWinRtExceptionInJs(exception);
          return;
        }
      }
      else 
      {
        Nan::ThrowError(Nan::Error(NodeRT::Utils::NewString(L"Bad arguments: no suitable overload found")));
        return;
      }
    }
    static void Close(Nan::NAN_METHOD_ARGS_TYPE info)
    {
      HandleScope scope;

      if (!NodeRT::Utils::IsWinRtWrapperOf<::Windows::Devices::Gpio::GpioPin^>(info.This()))
      {
	    return;
      }

      GpioPin *wrapper = GpioPin::Unwrap<GpioPin>(info.This());

      if (info.Length() == 0)
      {
        try
        {
          delete wrapper->_instance;
          wrapper->_instance = nullptr;
		  return;
        }
        catch (Platform::Exception ^exception)
        {
          NodeRT::Utils::ThrowWinRtExceptionInJs(exception);
		  return;
        }
      }
      else 
      {
        Nan::ThrowError(Nan::Error(NodeRT::Utils::NewString(L"Bad arguments: no suitable overload found")));
		return;
      }
    }




    static void DebounceTimeoutGetter(Local<String> property, const Nan::PropertyCallbackInfo<v8::Value> &info)
    {
      HandleScope scope;
      
      if (!NodeRT::Utils::IsWinRtWrapperOf<::Windows::Devices::Gpio::GpioPin^>(info.This()))
      {
        return;
      }

      GpioPin *wrapper = GpioPin::Unwrap<GpioPin>(info.This());

      try 
      {
        ::Windows::Foundation::TimeSpan result = wrapper->_instance->DebounceTimeout;
        info.GetReturnValue().Set(Nan::New<Number>(result.Duration/10000.0));
        return;
      }
      catch (Platform::Exception ^exception)
      {
        NodeRT::Utils::ThrowWinRtExceptionInJs(exception);
        return;
      }
    }
    
    static void DebounceTimeoutSetter(Local<String> property, Local<Value> value, const Nan::PropertyCallbackInfo<void> &info)
    {
      HandleScope scope;
      
      if (!value->IsNumber())
      {
        Nan::ThrowError(Nan::Error(NodeRT::Utils::NewString(L"Value to set is of unexpected type")));
        return;
      }

      if (!NodeRT::Utils::IsWinRtWrapperOf<::Windows::Devices::Gpio::GpioPin^>(info.This()))
      {
        return;
      }

      GpioPin *wrapper = GpioPin::Unwrap<GpioPin>(info.This());

      try 
      {
        
        ::Windows::Foundation::TimeSpan winRtValue = NodeRT::Utils::TimeSpanFromMilli(Nan::To<int64_t>(value).FromMaybe(0));

        wrapper->_instance->DebounceTimeout = winRtValue;
      }
      catch (Platform::Exception ^exception)
      {
        NodeRT::Utils::ThrowWinRtExceptionInJs(exception);
      }
    }
    
    static void PinNumberGetter(Local<String> property, const Nan::PropertyCallbackInfo<v8::Value> &info)
    {
      HandleScope scope;
      
      if (!NodeRT::Utils::IsWinRtWrapperOf<::Windows::Devices::Gpio::GpioPin^>(info.This()))
      {
        return;
      }

      GpioPin *wrapper = GpioPin::Unwrap<GpioPin>(info.This());

      try 
      {
        int result = wrapper->_instance->PinNumber;
        info.GetReturnValue().Set(Nan::New<Integer>(result));
        return;
      }
      catch (Platform::Exception ^exception)
      {
        NodeRT::Utils::ThrowWinRtExceptionInJs(exception);
        return;
      }
    }
    
    static void SharingModeGetter(Local<String> property, const Nan::PropertyCallbackInfo<v8::Value> &info)
    {
      HandleScope scope;
      
      if (!NodeRT::Utils::IsWinRtWrapperOf<::Windows::Devices::Gpio::GpioPin^>(info.This()))
      {
        return;
      }

      GpioPin *wrapper = GpioPin::Unwrap<GpioPin>(info.This());

      try 
      {
        ::Windows::Devices::Gpio::GpioSharingMode result = wrapper->_instance->SharingMode;
        info.GetReturnValue().Set(Nan::New<Integer>(static_cast<int>(result)));
        return;
      }
      catch (Platform::Exception ^exception)
      {
        NodeRT::Utils::ThrowWinRtExceptionInJs(exception);
        return;
      }
    }
    


    static void AddListener(Nan::NAN_METHOD_ARGS_TYPE info)
    {
      HandleScope scope;

      if (info.Length() < 2 || !info[0]->IsString() || !info[1]->IsFunction())
      {
        Nan::ThrowError(Nan::Error(NodeRT::Utils::NewString(L"wrong arguments, expected arguments are eventName(string),callback(function)")));
		return;
      }

      String::Value eventName(info[0]);
      auto str = *eventName;
      
      Local<Function> callback = info[1].As<Function>();
      
      ::Windows::Foundation::EventRegistrationToken registrationToken;
      if (NodeRT::Utils::CaseInsenstiveEquals(L"valueChanged", str))
      {
        if (!NodeRT::Utils::IsWinRtWrapperOf<::Windows::Devices::Gpio::GpioPin^>(info.This()))
        {
          Nan::ThrowError(Nan::Error(NodeRT::Utils::NewString(L"The caller of this method isn't of the expected type or internal WinRt object was disposed")));
		  return;
        }
        GpioPin *wrapper = GpioPin::Unwrap<GpioPin>(info.This());
      
        try
        {
          Persistent<Object>* perstPtr = new Persistent<Object>();
          perstPtr->Reset(NodeRT::Utils::CreateCallbackObjectInDomain(callback));
          std::shared_ptr<Persistent<Object>> callbackObjPtr(perstPtr, 
            [] (Persistent<Object> *ptr ) {
              NodeUtils::Async::RunOnMain([ptr]() {
                ptr->Reset();
                delete ptr;
            });
          });

          registrationToken = wrapper->_instance->ValueChanged::add(
            ref new ::Windows::Foundation::TypedEventHandler<::Windows::Devices::Gpio::GpioPin^, ::Windows::Devices::Gpio::GpioPinValueChangedEventArgs^>(
            [callbackObjPtr](::Windows::Devices::Gpio::GpioPin^ arg0, ::Windows::Devices::Gpio::GpioPinValueChangedEventArgs^ arg1) {
              NodeUtils::Async::RunOnMain([callbackObjPtr , arg0, arg1]() {
           	    HandleScope scope;
                TryCatch tryCatch;
              
                Local<Value> error;

                Local<Value> wrappedArg0 = WrapGpioPin(arg0);
                Local<Value> wrappedArg1 = WrapGpioPinValueChangedEventArgs(arg1);

                if (tryCatch.HasCaught())
                {
                  error = Nan::To<Object>(tryCatch.Exception()).ToLocalChecked();
                }
                else 
                {
                  error = Undefined();
                }

				// TODO: this is ugly! Needed due to the possibility of expception occuring inside object convertors
				// can be fixed by wrapping the conversion code in a function and calling it on the fly
				// we must clear the try catch block here so the invoked inner method exception won't get swollen (issue #52) 
				tryCatch.~TryCatch();


                if (wrappedArg0.IsEmpty()) wrappedArg0 = Undefined();
                if (wrappedArg1.IsEmpty()) wrappedArg1 = Undefined();

                Local<Value> args[] = { wrappedArg0, wrappedArg1 };
                Local<Object> callbackObjLocalRef = Nan::New<Object>(*callbackObjPtr);
                NodeRT::Utils::CallCallbackInDomain(callbackObjLocalRef, _countof(args), args);
              });
            })
          );
        }
        catch (Platform::Exception ^exception)
        {
          NodeRT::Utils::ThrowWinRtExceptionInJs(exception);
          return;
        }

      }
      else 
      {
        Nan::ThrowError(Nan::Error(String::Concat(NodeRT::Utils::NewString(L"given event name isn't supported: "), info[0].As<String>())));
		return;
      }

      Local<Value> tokenMapVal = NodeRT::Utils::GetHiddenValue(callback, Nan::New<String>(REGISTRATION_TOKEN_MAP_PROPERTY_NAME).ToLocalChecked());
      Local<Object> tokenMap;

      if (tokenMapVal.IsEmpty() || Nan::Equals(tokenMapVal, Undefined()).FromMaybe(false))
      {
        tokenMap = Nan::New<Object>();
        NodeRT::Utils::SetHiddenValueWithObject(callback, Nan::New<String>(REGISTRATION_TOKEN_MAP_PROPERTY_NAME).ToLocalChecked(), tokenMap);
      }
      else
      {
        tokenMap = Nan::To<Object>(tokenMapVal).ToLocalChecked();
      }

      Nan::Set(tokenMap, info[0], CreateOpaqueWrapper(::Windows::Foundation::PropertyValue::CreateInt64(registrationToken.Value)));
    }

    static void RemoveListener(Nan::NAN_METHOD_ARGS_TYPE info)
    {
      HandleScope scope;

      if (info.Length() < 2 || !info[0]->IsString() || !info[1]->IsFunction())
      {
        Nan::ThrowError(Nan::Error(NodeRT::Utils::NewString(L"wrong arguments, expected a string and a callback")));
        return;
      }

      String::Value eventName(info[0]);
      auto str = *eventName;

      if ((NodeRT::Utils::CaseInsenstiveEquals(L"valueChanged", str)))
      {
        Nan::ThrowError(Nan::Error(String::Concat(NodeRT::Utils::NewString(L"given event name isn't supported: "), info[0].As<String>())));
        return;
      }

      Local<Function> callback = info[1].As<Function>();
      Local<Value> tokenMap = NodeRT::Utils::GetHiddenValue(callback, Nan::New<String>(REGISTRATION_TOKEN_MAP_PROPERTY_NAME).ToLocalChecked());
                
      if (tokenMap.IsEmpty() || Nan::Equals(tokenMap, Undefined()).FromMaybe(false))
      {
        return;
      }

      Local<Value> opaqueWrapperObj =  Nan::Get(Nan::To<Object>(tokenMap).ToLocalChecked(), info[0]).ToLocalChecked();

      if (opaqueWrapperObj.IsEmpty() || Nan::Equals(opaqueWrapperObj,Undefined()).FromMaybe(false))
      {
        return;
      }

      OpaqueWrapper *opaqueWrapper = OpaqueWrapper::Unwrap<OpaqueWrapper>(opaqueWrapperObj.As<Object>());
            
      long long tokenValue = (long long) opaqueWrapper->GetObjectInstance();
      ::Windows::Foundation::EventRegistrationToken registrationToken;
      registrationToken.Value = tokenValue;
        
      try 
      {
        if (NodeRT::Utils::CaseInsenstiveEquals(L"valueChanged", str))
        {
          if (!NodeRT::Utils::IsWinRtWrapperOf<::Windows::Devices::Gpio::GpioPin^>(info.This()))
          {
            Nan::ThrowError(Nan::Error(NodeRT::Utils::NewString(L"The caller of this method isn't of the expected type or internal WinRt object was disposed")));
            return;
          }
          GpioPin *wrapper = GpioPin::Unwrap<GpioPin>(info.This());
          wrapper->_instance->ValueChanged::remove(registrationToken);
        }
      }
      catch (Platform::Exception ^exception)
      {
        NodeRT::Utils::ThrowWinRtExceptionInJs(exception);
      }

      Nan::Delete(Nan::To<Object>(tokenMap).ToLocalChecked(), Nan::To<String>(info[0]).ToLocalChecked());
    }
  private:
    ::Windows::Devices::Gpio::GpioPin^ _instance;
    static Persistent<FunctionTemplate> s_constructorTemplate;

    friend v8::Local<v8::Value> WrapGpioPin(::Windows::Devices::Gpio::GpioPin^ wintRtInstance);
    friend ::Windows::Devices::Gpio::GpioPin^ UnwrapGpioPin(Local<Value> value);
  };
  Persistent<FunctionTemplate> GpioPin::s_constructorTemplate;

  v8::Local<v8::Value> WrapGpioPin(::Windows::Devices::Gpio::GpioPin^ winRtInstance)
  {
    EscapableHandleScope scope;

    if (winRtInstance == nullptr)
    {
      return scope.Escape(Undefined());
    }

    Local<Value> opaqueWrapper = CreateOpaqueWrapper(winRtInstance);
    Local<Value> args[] = {opaqueWrapper};
    Local<FunctionTemplate> localRef = Nan::New<FunctionTemplate>(GpioPin::s_constructorTemplate);
    return scope.Escape(Nan::NewInstance(Nan::GetFunction(localRef).ToLocalChecked(),_countof(args), args).ToLocalChecked());
  }

  ::Windows::Devices::Gpio::GpioPin^ UnwrapGpioPin(Local<Value> value)
  {
     return GpioPin::Unwrap<GpioPin>(Nan::To<Object>(value).ToLocalChecked())->_instance;
  }

  void InitGpioPin(Local<Object> exports)
  {
    GpioPin::Init(exports);
  }

  class GpioController : public WrapperBase
  {
  public:    
    static void Init(const Local<Object> exports)
    {
      HandleScope scope;
      
      Local<FunctionTemplate> localRef = Nan::New<FunctionTemplate>(New);
      s_constructorTemplate.Reset(localRef);
      localRef->SetClassName(Nan::New<String>("GpioController").ToLocalChecked());
      localRef->InstanceTemplate()->SetInternalFieldCount(1);
      
      Local<Function> func;
      Local<FunctionTemplate> funcTemplate;
            
      Nan::SetPrototypeMethod(localRef, "openPin", OpenPin);
      Nan::SetPrototypeMethod(localRef, "tryOpenPin", TryOpenPin);
      
                        
      Nan::SetAccessor(localRef->PrototypeTemplate(), Nan::New<String>("pinCount").ToLocalChecked(), PinCountGetter);
      
      Local<Object> constructor = Nan::To<Object>(Nan::GetFunction(localRef).ToLocalChecked()).ToLocalChecked();
	  Nan::SetMethod(constructor, "castFrom", CastFrom);

      Nan::SetMethod(constructor, "getDefault", GetDefault);
      func = Nan::GetFunction(Nan::New<FunctionTemplate>(GetControllersAsync)).ToLocalChecked();
      Nan::Set(constructor, Nan::New<String>("getControllersAsync").ToLocalChecked(), func);
      func = Nan::GetFunction(Nan::New<FunctionTemplate>(GetDefaultAsync)).ToLocalChecked();
      Nan::Set(constructor, Nan::New<String>("getDefaultAsync").ToLocalChecked(), func);

      Nan::Set(exports, Nan::New<String>("GpioController").ToLocalChecked(), constructor);
    }


    virtual ::Platform::Object^ GetObjectInstance() const override
    {
      return _instance;
    }

  private:
    
    GpioController(::Windows::Devices::Gpio::GpioController^ instance)
    {
      _instance = instance;
    }
    
    
    static void New(Nan::NAN_METHOD_ARGS_TYPE info)
    {
      HandleScope scope;

	    Local<FunctionTemplate> localRef = Nan::New<FunctionTemplate>(s_constructorTemplate);

      // in case the constructor was called without the new operator
      if (!localRef->HasInstance(info.This()))
      {
        if (info.Length() > 0)
        {
          std::unique_ptr<Local<Value> []> constructorArgs(new Local<Value>[info.Length()]);

          Local<Value> *argsPtr = constructorArgs.get();
          for (int i = 0; i < info.Length(); i++)
          {
            argsPtr[i] = info[i];
          }

		  MaybeLocal<Object> res = Nan::NewInstance(Nan::GetFunction(localRef).ToLocalChecked(), info.Length(), constructorArgs.get());
		  if (res.IsEmpty())
		  {
			  return;
		  }
		  info.GetReturnValue().Set(res.ToLocalChecked());
		  return;
		}
		else
		{
          MaybeLocal<Object> res = Nan::NewInstance(Nan::GetFunction(localRef).ToLocalChecked(), info.Length(), nullptr);
          if (res.IsEmpty())
          {
            return;
          }
          info.GetReturnValue().Set(res.ToLocalChecked());
          return;
        }
      }
      
      ::Windows::Devices::Gpio::GpioController^ winRtInstance;


      if (info.Length() == 1 && OpaqueWrapper::IsOpaqueWrapper(info[0]) &&
        NodeRT::Utils::IsWinRtWrapperOf<::Windows::Devices::Gpio::GpioController^>(info[0]))
      {
        try 
        {
          winRtInstance = (::Windows::Devices::Gpio::GpioController^) NodeRT::Utils::GetObjectInstance(info[0]);
        }
        catch (Platform::Exception ^exception)
        {
          NodeRT::Utils::ThrowWinRtExceptionInJs(exception);
          return;
        }
      }
      else
      {
        Nan::ThrowError(Nan::Error(NodeRT::Utils::NewString(L"Invalid arguments, no suitable constructor found")));
	    	return;
      }

      NodeRT::Utils::SetHiddenValue(info.This(), Nan::New<String>("__winRtInstance__").ToLocalChecked(), True());

      GpioController *wrapperInstance = new GpioController(winRtInstance);
      wrapperInstance->Wrap(info.This());

      info.GetReturnValue().Set(info.This());
    }


	
    static void CastFrom(Nan::NAN_METHOD_ARGS_TYPE info)
    {
		HandleScope scope;
		if (info.Length() < 1 || !NodeRT::Utils::IsWinRtWrapperOf<::Windows::Devices::Gpio::GpioController^>(info[0]))
		{
			Nan::ThrowError(Nan::Error(NodeRT::Utils::NewString(L"Invalid arguments, no object provided, or given object could not be casted to requested type")));
			return;
		}

		::Windows::Devices::Gpio::GpioController^ winRtInstance;
		try
		{
			winRtInstance = (::Windows::Devices::Gpio::GpioController^) NodeRT::Utils::GetObjectInstance(info[0]);
		}
		catch (Platform::Exception ^exception)
		{
			NodeRT::Utils::ThrowWinRtExceptionInJs(exception);
			return;
		}

		info.GetReturnValue().Set(WrapGpioController(winRtInstance));
    }


  
    static void OpenPin(Nan::NAN_METHOD_ARGS_TYPE info)
    {
      HandleScope scope;

      if (!NodeRT::Utils::IsWinRtWrapperOf<::Windows::Devices::Gpio::GpioController^>(info.This()))
      {
        return;
      }

      GpioController *wrapper = GpioController::Unwrap<GpioController>(info.This());

      if (info.Length() == 1
        && info[0]->IsInt32())
      {
        try
        {
          int arg0 = static_cast<int>(Nan::To<int32_t>(info[0]).FromMaybe(0));
          
          ::Windows::Devices::Gpio::GpioPin^ result;
          result = wrapper->_instance->OpenPin(arg0);
          info.GetReturnValue().Set(WrapGpioPin(result));
          return;
        }
        catch (Platform::Exception ^exception)
        {
          NodeRT::Utils::ThrowWinRtExceptionInJs(exception);
          return;
        }
      }
      else if (info.Length() == 2
        && info[0]->IsInt32()
        && info[1]->IsInt32())
      {
        try
        {
          int arg0 = static_cast<int>(Nan::To<int32_t>(info[0]).FromMaybe(0));
          ::Windows::Devices::Gpio::GpioSharingMode arg1 = static_cast<::Windows::Devices::Gpio::GpioSharingMode>(Nan::To<int32_t>(info[1]).FromMaybe(0));
          
          ::Windows::Devices::Gpio::GpioPin^ result;
          result = wrapper->_instance->OpenPin(arg0, arg1);
          info.GetReturnValue().Set(WrapGpioPin(result));
          return;
        }
        catch (Platform::Exception ^exception)
        {
          NodeRT::Utils::ThrowWinRtExceptionInJs(exception);
          return;
        }
      }
      else 
      {
        Nan::ThrowError(Nan::Error(NodeRT::Utils::NewString(L"Bad arguments: no suitable overload found")));
        return;
      }
    }
    static void TryOpenPin(Nan::NAN_METHOD_ARGS_TYPE info)
    {
      HandleScope scope;

      if (!NodeRT::Utils::IsWinRtWrapperOf<::Windows::Devices::Gpio::GpioController^>(info.This()))
      {
        return;
      }

      GpioController *wrapper = GpioController::Unwrap<GpioController>(info.This());

      if (info.Length() == 2
        && info[0]->IsInt32()
        && info[1]->IsInt32())
      {
        try
        {
          int arg0 = static_cast<int>(Nan::To<int32_t>(info[0]).FromMaybe(0));
          ::Windows::Devices::Gpio::GpioSharingMode arg1 = static_cast<::Windows::Devices::Gpio::GpioSharingMode>(Nan::To<int32_t>(info[1]).FromMaybe(0));
          ::Windows::Devices::Gpio::GpioPin^ arg2;
          ::Windows::Devices::Gpio::GpioOpenStatus arg3;
          
          bool result;
          result = wrapper->_instance->TryOpenPin(arg0, arg1, &arg2, &arg3);
          Local<Object> resObj = Nan::New<Object>();
          Nan::Set(resObj, Nan::New<String>("boolean").ToLocalChecked(), Nan::New<Boolean>(result));
          Nan::Set(resObj, Nan::New<String>("pin").ToLocalChecked(), NodeRT::Utils::CreateExternalWinRTObject("Windows.Devices.Gpio", "GpioPin", arg2));
          Nan::Set(resObj, Nan::New<String>("openStatus").ToLocalChecked(), Nan::New<Integer>(static_cast<int>(arg3)));
          info.GetReturnValue().Set(resObj);
          return;
        }
        catch (Platform::Exception ^exception)
        {
          NodeRT::Utils::ThrowWinRtExceptionInJs(exception);
          return;
        }
      }
      else 
      {
        Nan::ThrowError(Nan::Error(NodeRT::Utils::NewString(L"Bad arguments: no suitable overload found")));
        return;
      }
    }

    static void GetControllersAsync(Nan::NAN_METHOD_ARGS_TYPE info)
    {
      HandleScope scope;

      if (info.Length() == 0 || !info[info.Length() -1]->IsFunction())
      {
          Nan::ThrowError(Nan::Error(NodeRT::Utils::NewString(L"Bad arguments: No callback was given")));
          return;
      }

      ::Windows::Foundation::IAsyncOperation<::Windows::Foundation::Collections::IVectorView<::Windows::Devices::Gpio::GpioController^>^>^ op;
      

      if (info.Length() == 2
        && NodeRT::Utils::IsWinRtWrapperOf<::Windows::Devices::Gpio::Provider::IGpioProvider^>(info[0]))
      {
        try
        {
          ::Windows::Devices::Gpio::Provider::IGpioProvider^ arg0 = dynamic_cast<::Windows::Devices::Gpio::Provider::IGpioProvider^>(NodeRT::Utils::GetObjectInstance(info[0]));
          
          op = ::Windows::Devices::Gpio::GpioController::GetControllersAsync(arg0);
        }
        catch (Platform::Exception ^exception)
        {
          NodeRT::Utils::ThrowWinRtExceptionInJs(exception);
          return;
        }
      }
      else 
      {
        Nan::ThrowError(Nan::Error(NodeRT::Utils::NewString(L"Bad arguments: no suitable overload found")));
        return;
      }
    
      auto opTask = create_task(op);
      uv_async_t* asyncToken = NodeUtils::Async::GetAsyncToken(info[info.Length() -1].As<Function>());

      opTask.then( [asyncToken] (task<::Windows::Foundation::Collections::IVectorView<::Windows::Devices::Gpio::GpioController^>^> t) 
      {	
        try
        {
          auto result = t.get();
          NodeUtils::Async::RunCallbackOnMain(asyncToken, [result](NodeUtils::InvokeCallbackDelegate invokeCallback) {

            
            TryCatch tryCatch;
            Local<Value> error; 
            Local<Value> arg1 = NodeRT::Collections::VectorViewWrapper<::Windows::Devices::Gpio::GpioController^>::CreateVectorViewWrapper(result, 
            [](::Windows::Devices::Gpio::GpioController^ val) -> Local<Value> {
              return WrapGpioController(val);
            },
            [](Local<Value> value) -> bool {
              return NodeRT::Utils::IsWinRtWrapperOf<::Windows::Devices::Gpio::GpioController^>(value);
            },
            [](Local<Value> value) -> ::Windows::Devices::Gpio::GpioController^ {
              return UnwrapGpioController(value);
            }
          );
            if (tryCatch.HasCaught())
            {
              error = Nan::To<Object>(tryCatch.Exception()).ToLocalChecked();
            }
            else 
            {
              error = Undefined();
            }
            if (arg1.IsEmpty()) arg1 = Undefined();
            Local<Value> args[] = {error, arg1};
			// TODO: this is ugly! Needed due to the possibility of expception occuring inside object convertors
			// can be fixed by wrapping the conversion code in a function and calling it on the fly
			// we must clear the try catch block here so the invoked inner method exception won't get swollen (issue #52) 
			tryCatch.~TryCatch();

	  	    
            invokeCallback(_countof(args), args);
          });
        }
        catch (Platform::Exception^ exception)
        {
          NodeUtils::Async::RunCallbackOnMain(asyncToken, [exception](NodeUtils::InvokeCallbackDelegate invokeCallback) {
          
            Local<Value> error = NodeRT::Utils::WinRtExceptionToJsError(exception);
        
            Local<Value> args[] = {error};
            invokeCallback(_countof(args), args);
          });
        }  		
      });
    }
    static void GetDefaultAsync(Nan::NAN_METHOD_ARGS_TYPE info)
    {
      HandleScope scope;

      if (info.Length() == 0 || !info[info.Length() -1]->IsFunction())
      {
          Nan::ThrowError(Nan::Error(NodeRT::Utils::NewString(L"Bad arguments: No callback was given")));
          return;
      }

      ::Windows::Foundation::IAsyncOperation<::Windows::Devices::Gpio::GpioController^>^ op;
      

      if (info.Length() == 1)
      {
        try
        {
          op = ::Windows::Devices::Gpio::GpioController::GetDefaultAsync();
        }
        catch (Platform::Exception ^exception)
        {
          NodeRT::Utils::ThrowWinRtExceptionInJs(exception);
          return;
        }
      }
      else 
      {
        Nan::ThrowError(Nan::Error(NodeRT::Utils::NewString(L"Bad arguments: no suitable overload found")));
        return;
      }
    
      auto opTask = create_task(op);
      uv_async_t* asyncToken = NodeUtils::Async::GetAsyncToken(info[info.Length() -1].As<Function>());

      opTask.then( [asyncToken] (task<::Windows::Devices::Gpio::GpioController^> t) 
      {	
        try
        {
          auto result = t.get();
          NodeUtils::Async::RunCallbackOnMain(asyncToken, [result](NodeUtils::InvokeCallbackDelegate invokeCallback) {

            
            TryCatch tryCatch;
            Local<Value> error; 
            Local<Value> arg1 = WrapGpioController(result);
            if (tryCatch.HasCaught())
            {
              error = Nan::To<Object>(tryCatch.Exception()).ToLocalChecked();
            }
            else 
            {
              error = Undefined();
            }
            if (arg1.IsEmpty()) arg1 = Undefined();
            Local<Value> args[] = {error, arg1};
			// TODO: this is ugly! Needed due to the possibility of expception occuring inside object convertors
			// can be fixed by wrapping the conversion code in a function and calling it on the fly
			// we must clear the try catch block here so the invoked inner method exception won't get swollen (issue #52) 
			tryCatch.~TryCatch();

	  	    
            invokeCallback(_countof(args), args);
          });
        }
        catch (Platform::Exception^ exception)
        {
          NodeUtils::Async::RunCallbackOnMain(asyncToken, [exception](NodeUtils::InvokeCallbackDelegate invokeCallback) {
          
            Local<Value> error = NodeRT::Utils::WinRtExceptionToJsError(exception);
        
            Local<Value> args[] = {error};
            invokeCallback(_countof(args), args);
          });
        }  		
      });
    }

    static void GetDefault(Nan::NAN_METHOD_ARGS_TYPE info)
    {
      HandleScope scope;

      if (info.Length() == 0)
      {
        try
        {
          ::Windows::Devices::Gpio::GpioController^ result;
          result = ::Windows::Devices::Gpio::GpioController::GetDefault();
          info.GetReturnValue().Set(WrapGpioController(result));
          return;
        }
        catch (Platform::Exception ^exception)
        {
          NodeRT::Utils::ThrowWinRtExceptionInJs(exception);
          return;
        }
      }
      else 
      {
        Nan::ThrowError(Nan::Error(NodeRT::Utils::NewString(L"Bad arguments: no suitable overload found")));
        return;
      }
    }

    static void PinCountGetter(Local<String> property, const Nan::PropertyCallbackInfo<v8::Value> &info)
    {
      HandleScope scope;
      
      if (!NodeRT::Utils::IsWinRtWrapperOf<::Windows::Devices::Gpio::GpioController^>(info.This()))
      {
        return;
      }

      GpioController *wrapper = GpioController::Unwrap<GpioController>(info.This());

      try 
      {
        int result = wrapper->_instance->PinCount;
        info.GetReturnValue().Set(Nan::New<Integer>(result));
        return;
      }
      catch (Platform::Exception ^exception)
      {
        NodeRT::Utils::ThrowWinRtExceptionInJs(exception);
        return;
      }
    }
    


  private:
    ::Windows::Devices::Gpio::GpioController^ _instance;
    static Persistent<FunctionTemplate> s_constructorTemplate;

    friend v8::Local<v8::Value> WrapGpioController(::Windows::Devices::Gpio::GpioController^ wintRtInstance);
    friend ::Windows::Devices::Gpio::GpioController^ UnwrapGpioController(Local<Value> value);
  };
  Persistent<FunctionTemplate> GpioController::s_constructorTemplate;

  v8::Local<v8::Value> WrapGpioController(::Windows::Devices::Gpio::GpioController^ winRtInstance)
  {
    EscapableHandleScope scope;

    if (winRtInstance == nullptr)
    {
      return scope.Escape(Undefined());
    }

    Local<Value> opaqueWrapper = CreateOpaqueWrapper(winRtInstance);
    Local<Value> args[] = {opaqueWrapper};
    Local<FunctionTemplate> localRef = Nan::New<FunctionTemplate>(GpioController::s_constructorTemplate);
    return scope.Escape(Nan::NewInstance(Nan::GetFunction(localRef).ToLocalChecked(),_countof(args), args).ToLocalChecked());
  }

  ::Windows::Devices::Gpio::GpioController^ UnwrapGpioController(Local<Value> value)
  {
     return GpioController::Unwrap<GpioController>(Nan::To<Object>(value).ToLocalChecked())->_instance;
  }

  void InitGpioController(Local<Object> exports)
  {
    GpioController::Init(exports);
  }

} } } } 

NAN_MODULE_INIT(init)
{
  // we ignore failures for now since it probably means that the initialization already happened for STA, and that's cool
  CoInitializeEx(nullptr, COINIT_MULTITHREADED);
  //if (FAILED(CoInitializeEx(nullptr, COINIT_MULTITHREADED)))
  /*{
    Nan::ThrowError(Nan::Error(NodeRT::Utils::NewString(L"error in CoInitializeEx()")));
    return;
  }*/
  
  NodeRT::Windows::Devices::Gpio::InitGpioSharingModeEnum(target);
  NodeRT::Windows::Devices::Gpio::InitGpioOpenStatusEnum(target);
  NodeRT::Windows::Devices::Gpio::InitGpioPinDriveModeEnum(target);
  NodeRT::Windows::Devices::Gpio::InitGpioPinValueEnum(target);
  NodeRT::Windows::Devices::Gpio::InitGpioPinEdgeEnum(target);
  NodeRT::Windows::Devices::Gpio::InitGpioPinValueChangedEventArgs(target);
  NodeRT::Windows::Devices::Gpio::InitGpioPin(target);
  NodeRT::Windows::Devices::Gpio::InitGpioController(target);

  NodeRT::Utils::RegisterNameSpace("Windows.Devices.Gpio", target);
}


NODE_MODULE(binding, init)