/* Copyright (c) 2022 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 <ostream>
#include <string>
#include <tuple>

#include "paddle/utils/any.h"
#include "paddle/utils/flat_hash_map.h"
#include "paddle/utils/small_vector.h"

namespace pten {

// tuple(input_names, attr_names, output_names)
using KernelArgsTuple = std::tuple<paddle::SmallVector<std::string>,
                                   paddle::SmallVector<std::string>,
                                   paddle::SmallVector<std::string>>;

struct KernelSignature {
  std::string name;
  KernelArgsTuple args;

  KernelSignature() = default;
  KernelSignature(std::string&& kernel_name,
                  paddle::SmallVector<std::string>&& inputs,
                  paddle::SmallVector<std::string>&& attrs,
                  paddle::SmallVector<std::string>&& outputs)
      : name(std::move(kernel_name)),
        args(std::make_tuple(inputs, attrs, outputs)) {}
  KernelSignature(const std::string& kernel_name,
                  const paddle::SmallVector<std::string>& inputs,
                  const paddle::SmallVector<std::string>& attrs,
                  const paddle::SmallVector<std::string>& outputs)
      : name(kernel_name), args(std::make_tuple(inputs, attrs, outputs)) {}
};

std::ostream& operator<<(std::ostream& os, KernelSignature signature);

// TODO(chenweihang): Add more methods if needed in future
class ArgumentMappingContext {
 public:
  virtual ~ArgumentMappingContext() = default;

  virtual bool HasInput(const std::string& name) const = 0;
  virtual bool HasOutput(const std::string& name) const = 0;

  // now we can't use Attribute here, it will cause pten relay on
  // boost::variant and BlockDesc
  virtual paddle::any Attr(const std::string& name) const = 0;

  virtual size_t InputSize(const std::string& name) const = 0;
  virtual size_t OutputSize(const std::string& name) const = 0;

  virtual bool IsDenseTensorInput(const std::string& name) const = 0;
  virtual bool IsSelectedRowsInput(const std::string& name) const = 0;
};

}  // namespace pten
