// Copyright (c) 2018 PaddlePaddle Authors. 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
//
// 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 <functional>
#include <map>
#include <memory>
#include <string>
#include <utility>

namespace paddle {
namespace inference {
namespace anakin {

class AnakinOpConverter;

class OpRegister {
 public:
  OpRegister() = default;
  std::shared_ptr<AnakinOpConverter> Get(const std::string &name);
  static OpRegister *instance();
  void OpRegisterFn(const std::string &name,
                    std::function<std::shared_ptr<AnakinOpConverter>()> fn) {
    registry_[name] = fn;
  }

 private:
  using RegisterFnType = std::function<std::shared_ptr<AnakinOpConverter>()>;
  std::map<std::string, std::function<std::shared_ptr<AnakinOpConverter>()>>
      registry_;
};

template <typename T, typename... Args>
class Registrar {
 public:
  Registrar(const std::string &name, Args... args) {
    std::shared_ptr<AnakinOpConverter> converter =
        std::make_shared<T>(std::move(args)...);
    OpRegister::instance()->OpRegisterFn(name,
                                         [converter]() { return converter; });
  }
};

}  // namespace anakin
}  // namespace inference
}  // namespace paddle