/*
Copyright 2016 Gábor Mező (gabor.mezo@outlook.com)

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

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

#pragma once
#include <nan.h>

namespace fastcall {
inline void Noop(char* data, void* hint) {}

inline v8::Local<v8::Object> WrapPointer(char* ptr, size_t length = 0)
{
    if (ptr == nullptr)
        length = 0;
    return Nan::NewBuffer(ptr, length, Noop, nullptr).ToLocalChecked();
}

inline v8::Local<v8::Object> WrapNullPointer()
{
    return WrapPointer((char*)nullptr, (size_t)0);
}

inline char* UnwrapPointer(const v8::Local<v8::Value>& value)
{
	assert(value->IsObject() && node::Buffer::HasInstance(value));
    return node::Buffer::Data(value);
}

template <typename T>
inline v8::Local<v8::Object> Wrap(T* object)
{
    assert(object);

    return
        Nan::NewBuffer(
           reinterpret_cast<char*>(object),
            0,
            [](char* data, void* hint) {
                delete reinterpret_cast<T*>(data);
            },
            nullptr)
            .ToLocalChecked();
}

template <typename T>
inline v8::Local<v8::Object> Wrap(T* object, Nan::FreeCallback freeFunction)
{
    assert(object);

    return
        Nan::NewBuffer(
            reinterpret_cast<char*>(object),
            0,
            freeFunction,
            nullptr)
            .ToLocalChecked();
}

template <typename T>
inline T* Unwrap(const v8::Local<v8::Value>& value)
{
    assert(value->IsObject() && node::Buffer::HasInstance(value));
	auto data = node::Buffer::Data(value);
    auto ptr = reinterpret_cast<T*>(data);
	return ptr;
}

template <typename S>
v8::Local<v8::Value> GetValue(const S& value, const char* key)
{
    Nan::EscapableHandleScope scope;

    return scope.Escape(Nan::Get(value, Nan::New(key).ToLocalChecked()).ToLocalChecked());
}

template <typename T, typename S>
v8::Local<T> GetValue(const S& value, const char* key)
{
    Nan::EscapableHandleScope scope;

#if _MSC_VER
    return scope.Escape(Nan::Get(value, Nan::New(key).ToLocalChecked()).ToLocalChecked().As<T>());
#else
    return scope.Escape(Nan::Get(value, Nan::New(key).ToLocalChecked()).ToLocalChecked().template As<T>());
#endif
}

template <typename T, typename S>
void SetValue(T& value, const char* key, const S& v)
{
    Nan::HandleScope scope;

    Nan::Set(value, Nan::New(key).ToLocalChecked(), v);
}

template <typename T>
v8::Local<v8::Object> WrapPointer(T* ptr, size_t length = 0)
{
    Nan::EscapableHandleScope scope;

    return scope.Escape(WrapPointer(reinterpret_cast<char*>(ptr), length));
}

template <typename T>
T* UnwrapPointer(const v8::Local<v8::Value>& value)
{
    Nan::HandleScope scope;

    return reinterpret_cast<T*>(UnwrapPointer(value));
}

inline v8::Local<v8::Object> GetGlobal()
{
    return Nan::GetCurrentContext()->Global();
}

inline void DeleteUVAsyncHandle(uv_handle_t* handle)
{
    delete (uv_async_t*)handle;
}

bool InstanceOf(const v8::Local<v8::Object>& obj, v8::Local<v8::Function> ctor);
}