// Copyright (c) The NodeRT Contributors
// 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::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 Geolocation { namespace Provider { 
  v8::Local<v8::Value> WrapGeolocationProvider(::Windows::Devices::Geolocation::Provider::GeolocationProvider^ wintRtInstance);
  ::Windows::Devices::Geolocation::Provider::GeolocationProvider^ UnwrapGeolocationProvider(Local<Value> value);
  



  static void InitLocationOverrideStatusEnum(const Local<Object> exports) {
    HandleScope scope;

    Local<Object> enumObject = Nan::New<Object>();

    Nan::Set(exports, Nan::New<String>("LocationOverrideStatus").ToLocalChecked(), enumObject);
    Nan::Set(enumObject, Nan::New<String>("success").ToLocalChecked(), Nan::New<Integer>(static_cast<int>(::Windows::Devices::Geolocation::Provider::LocationOverrideStatus::Success)));
    Nan::Set(enumObject, Nan::New<String>("accessDenied").ToLocalChecked(), Nan::New<Integer>(static_cast<int>(::Windows::Devices::Geolocation::Provider::LocationOverrideStatus::AccessDenied)));
    Nan::Set(enumObject, Nan::New<String>("alreadyStarted").ToLocalChecked(), Nan::New<Integer>(static_cast<int>(::Windows::Devices::Geolocation::Provider::LocationOverrideStatus::AlreadyStarted)));
    Nan::Set(enumObject, Nan::New<String>("other").ToLocalChecked(), Nan::New<Integer>(static_cast<int>(::Windows::Devices::Geolocation::Provider::LocationOverrideStatus::Other)));
  }


  static bool IsBasicGeopositionJsObject(Local<Value> value) {
    if (!value->IsObject()) {
      return false;
    }

    Local<String> symbol;
    Local<Object> obj = Nan::To<Object>(value).ToLocalChecked();

    symbol = Nan::New<String>("latitude").ToLocalChecked();
    if (Nan::Has(obj, symbol).FromMaybe(false)) {
      if (!Nan::Get(obj,symbol).ToLocalChecked()->IsNumber()) {
        return false;
      }
    }
    
    symbol = Nan::New<String>("longitude").ToLocalChecked();
    if (Nan::Has(obj, symbol).FromMaybe(false)) {
      if (!Nan::Get(obj,symbol).ToLocalChecked()->IsNumber()) {
        return false;
      }
    }
    
    symbol = Nan::New<String>("altitude").ToLocalChecked();
    if (Nan::Has(obj, symbol).FromMaybe(false)) {
      if (!Nan::Get(obj,symbol).ToLocalChecked()->IsNumber()) {
        return false;
      }
    }
    
    return true;
  }

  ::Windows::Devices::Geolocation::BasicGeoposition BasicGeopositionFromJsObject(Local<Value> value) {
    HandleScope scope;
    ::Windows::Devices::Geolocation::BasicGeoposition returnValue;

    if (!value->IsObject()) {
      Nan::ThrowError(Nan::TypeError(NodeRT::Utils::NewString(L"Unexpected type, expected an object")));
      return returnValue;
    }

    Local<Object> obj = Nan::To<Object>(value).ToLocalChecked();
    Local<String> symbol;

    symbol = Nan::New<String>("latitude").ToLocalChecked();
    if (Nan::Has(obj, symbol).FromMaybe(false)) {
      returnValue.Latitude = Nan::To<double>(Nan::Get(obj,symbol).ToLocalChecked()).FromMaybe(0.0);
    }
    
    symbol = Nan::New<String>("longitude").ToLocalChecked();
    if (Nan::Has(obj, symbol).FromMaybe(false)) {
      returnValue.Longitude = Nan::To<double>(Nan::Get(obj,symbol).ToLocalChecked()).FromMaybe(0.0);
    }
    
    symbol = Nan::New<String>("altitude").ToLocalChecked();
    if (Nan::Has(obj, symbol).FromMaybe(false)) {
      returnValue.Altitude = Nan::To<double>(Nan::Get(obj,symbol).ToLocalChecked()).FromMaybe(0.0);
    }
    
    return returnValue;
  }

  Local<Value> BasicGeopositionToJsObject(::Windows::Devices::Geolocation::BasicGeoposition value) {
    EscapableHandleScope scope;

    Local<Object> obj = Nan::New<Object>();

    Nan::Set(obj, Nan::New<String>("latitude").ToLocalChecked(), Nan::New<Number>(static_cast<double>(value.Latitude)));
    Nan::Set(obj, Nan::New<String>("longitude").ToLocalChecked(), Nan::New<Number>(static_cast<double>(value.Longitude)));
    Nan::Set(obj, Nan::New<String>("altitude").ToLocalChecked(), Nan::New<Number>(static_cast<double>(value.Altitude)));

    return scope.Escape(obj);
  }

  class GeolocationProvider : 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>("GeolocationProvider").ToLocalChecked());
        localRef->InstanceTemplate()->SetInternalFieldCount(1);


          
            Nan::SetPrototypeMethod(localRef, "setOverridePosition", SetOverridePosition);
            Nan::SetPrototypeMethod(localRef, "clearOverridePosition", ClearOverridePosition);
          


          
          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>("isOverridden").ToLocalChecked(), IsOverriddenGetter);

        Local<Object> constructor = Nan::To<Object>(Nan::GetFunction(localRef).ToLocalChecked()).ToLocalChecked();
        Nan::SetMethod(constructor, "castFrom", CastFrom);



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

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

    private:

      GeolocationProvider(::Windows::Devices::Geolocation::Provider::GeolocationProvider^ 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::Geolocation::Provider::GeolocationProvider^ winRtInstance;


      if (info.Length() == 1 && OpaqueWrapper::IsOpaqueWrapper(info[0]) &&
        NodeRT::Utils::IsWinRtWrapperOf<::Windows::Devices::Geolocation::Provider::GeolocationProvider^>(info[0])) {
        try {
          winRtInstance = (::Windows::Devices::Geolocation::Provider::GeolocationProvider^) NodeRT::Utils::GetObjectInstance(info[0]);
        } catch (Platform::Exception ^exception) {
          NodeRT::Utils::ThrowWinRtExceptionInJs(exception);
          return;
        }
      }
      else if (info.Length() == 0)
      {
        try {
          winRtInstance = ref new ::Windows::Devices::Geolocation::Provider::GeolocationProvider();
        } 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());

      GeolocationProvider *wrapperInstance = new GeolocationProvider(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::Geolocation::Provider::GeolocationProvider^>(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::Geolocation::Provider::GeolocationProvider^ winRtInstance;
      try {
        winRtInstance = (::Windows::Devices::Geolocation::Provider::GeolocationProvider^) NodeRT::Utils::GetObjectInstance(info[0]);
      } catch (Platform::Exception ^exception) {
        NodeRT::Utils::ThrowWinRtExceptionInJs(exception);
        return;
      }

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


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

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

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

      if (info.Length() == 3
        && IsBasicGeopositionJsObject(info[0])
        && info[1]->IsInt32()
        && info[2]->IsNumber())
      {
        try
        {
          ::Windows::Devices::Geolocation::BasicGeoposition arg0 = BasicGeopositionFromJsObject(info[0]);
          ::Windows::Devices::Geolocation::PositionSource arg1 = static_cast<::Windows::Devices::Geolocation::PositionSource>(Nan::To<int32_t>(info[1]).FromMaybe(0));
          double arg2 = Nan::To<double>(info[2]).FromMaybe(0.0);
          
          ::Windows::Devices::Geolocation::Provider::LocationOverrideStatus result;
          result = wrapper->_instance->SetOverridePosition(arg0, arg1, arg2);
          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 ClearOverridePosition(Nan::NAN_METHOD_ARGS_TYPE info) {
      HandleScope scope;

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

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

      if (info.Length() == 0)
      {
        try
        {
          wrapper->_instance->ClearOverridePosition();
          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 IsOverriddenGetter(Local<String> property, const Nan::PropertyCallbackInfo<v8::Value> &info) {
      HandleScope scope;

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

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

      try  {
        bool result = wrapper->_instance->IsOverridden;
        info.GetReturnValue().Set(Nan::New<Boolean>(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(v8::Isolate::GetCurrent(), info[0]);
      auto str = *eventName;

      Local<Function> callback = info[1].As<Function>();

      ::Windows::Foundation::EventRegistrationToken registrationToken;
      if (NodeRT::Utils::CaseInsenstiveEquals(L"isOverriddenChanged", str))
      {
        if (!NodeRT::Utils::IsWinRtWrapperOf<::Windows::Devices::Geolocation::Provider::GeolocationProvider^>(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;
        }
        GeolocationProvider *wrapper = GeolocationProvider::Unwrap<GeolocationProvider>(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->IsOverriddenChanged::add(
            ref new ::Windows::Foundation::EventHandler<::Platform::Object^>(
            [callbackObjPtr](::Platform::Object^ arg0, ::Platform::Object^ arg1) {
              NodeUtils::Async::RunOnMain([callbackObjPtr , arg0, arg1]() {
                HandleScope scope;


                Local<Value> wrappedArg0;
                Local<Value> wrappedArg1;

                {
                  TryCatch tryCatch;


                  wrappedArg0 = CreateOpaqueWrapper(arg0);
                  wrappedArg1 = CreateOpaqueWrapper(arg1);


                  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(v8::Isolate::GetCurrent(), 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(v8::Isolate::GetCurrent(), info[0]);
      auto str = *eventName;

      if ((!NodeRT::Utils::CaseInsenstiveEquals(L"isOverriddenChanged", str))) {
        Nan::ThrowError(Nan::Error(String::Concat(v8::Isolate::GetCurrent(), 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"isOverriddenChanged", str)) {
          if (!NodeRT::Utils::IsWinRtWrapperOf<::Windows::Devices::Geolocation::Provider::GeolocationProvider^>(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;
          }
          GeolocationProvider *wrapper = GeolocationProvider::Unwrap<GeolocationProvider>(info.This());
          wrapper->_instance->IsOverriddenChanged::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::Geolocation::Provider::GeolocationProvider^ _instance;
      static Persistent<FunctionTemplate> s_constructorTemplate;

      friend v8::Local<v8::Value> WrapGeolocationProvider(::Windows::Devices::Geolocation::Provider::GeolocationProvider^ wintRtInstance);
      friend ::Windows::Devices::Geolocation::Provider::GeolocationProvider^ UnwrapGeolocationProvider(Local<Value> value);
  };

  Persistent<FunctionTemplate> GeolocationProvider::s_constructorTemplate;

  v8::Local<v8::Value> WrapGeolocationProvider(::Windows::Devices::Geolocation::Provider::GeolocationProvider^ 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>(GeolocationProvider::s_constructorTemplate);
    return scope.Escape(Nan::NewInstance(Nan::GetFunction(localRef).ToLocalChecked(),_countof(args), args).ToLocalChecked());
  }

  ::Windows::Devices::Geolocation::Provider::GeolocationProvider^ UnwrapGeolocationProvider(Local<Value> value) {
     return GeolocationProvider::Unwrap<GeolocationProvider>(Nan::To<Object>(value).ToLocalChecked())->_instance;
  }

  void InitGeolocationProvider(Local<Object> exports) {
    GeolocationProvider::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::Geolocation::Provider::InitLocationOverrideStatusEnum(target);
      NodeRT::Windows::Devices::Geolocation::Provider::InitGeolocationProvider(target);


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



NODE_MODULE(binding, init)