//   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 "paddle/fluid/framework/op_registry.h"
#include "paddle/fluid/framework/reader.h"

namespace paddle {
namespace operators {
namespace reader {

extern std::vector<framework::DDim> RestoreShapes(
    const std::vector<int>& shape_concat, const std::vector<int>& ranks);

class FileReaderMakerBase : public framework::OpProtoAndCheckerMaker {
 public:
  FileReaderMakerBase(OpProto* op_proto, OpAttrChecker* op_checker);
};

class FileReaderInferShape : public framework::InferShapeBase {
 public:
  void operator()(framework::InferShapeContext* ctx) const override;
};

class FileReaderInferVarType : public framework::VarTypeInference {
 public:
  void operator()(const framework::OpDesc& op_desc,
                  framework::BlockDesc* block) const override;
};

// general infershape for decorated reader
class DecoratedReaderInferShape : public framework::InferShapeBase {
 public:
  void operator()(framework::InferShapeContext* ctx) const override;
};

// general var type inference for decorated reader
class DecoratedReaderInferVarType : public framework::VarTypeInference {
 public:
  void operator()(const framework::OpDesc& op_desc,
                  framework::BlockDesc* block) const override;
};

class DecoratedReaderMakerBase : public framework::OpProtoAndCheckerMaker {
 public:
  DecoratedReaderMakerBase(OpProto* op_proto, OpAttrChecker* op_checker);
};

}  // namespace reader
}  // namespace operators
}  // namespace paddle

#define REGISTER_FILE_READER_OPERATOR(op_name, ...)                  \
  REGISTER_OPERATOR(op_name, __VA_ARGS__,                            \
                    paddle::operators::reader::FileReaderInferShape, \
                    paddle::framework::EmptyGradOpMaker,             \
                    paddle::operators::reader::FileReaderInferVarType)

#define REGISTER_DECORATED_READER_OPERATOR(op_name, ...)                  \
  REGISTER_OPERATOR(op_name, __VA_ARGS__,                                 \
                    paddle::operators::reader::DecoratedReaderInferShape, \
                    paddle::framework::EmptyGradOpMaker,                  \
                    paddle::operators::reader::DecoratedReaderInferVarType)