/* 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 <map>
#include <memory>
#include <string>
#include <utility>
#include <vector>
#include "common/types.h"
#include "common/util.h"
#include "framework/lod_tensor.h"
#include "framework/operator.h"
#include "framework/program/program.h"
#include "framework/tensor.h"

namespace paddle_mobile {
namespace framework {

template <typename Device, typename T = float>
class Executor {
 public:
  Executor(const Program<Device> &program,
           paddle_mobile::PaddleMobileConfigInternal config, int batch_size = 1,
           const bool use_optimize = true, const bool lod_mode = false);

  void SetThreadNum(int threads);

  PMStatus Predict(const std::vector<std::pair<std::string, Tensor>> &inputs);
  PMStatus Predict(
      const std::vector<std::pair<std::string, LoDTensor>> &inputs);

  std::vector<T> Predict(const std::vector<T> &input,
                         const std::vector<int64_t> &dims);
  PMStatus Predict();

  void SetInput(const Tensor &input, const std::string &var_name);
  void SetInput(const LoDTensor &input, const std::string &var_name);

  std::shared_ptr<LoDTensor> GetOutput(const std::string &var_name);

#ifdef PADDLE_MOBILE_FPGA
  void InjectVariable(const Tensor &t, std::string var_name);
  void FeedData(const Tensor &t);
  void FeedData(const std::vector<void *> &v);

  void GetResults(std::vector<void *> *v);
  void GetTensorResults(std::vector<framework::Tensor *> *v);
  framework::Tensor *GetTensorByName(const std::string &name);

  std::shared_ptr<Tensor> FetchResult(int id = -1);
  void Predict_From_To(int start = 0, int end = -1);
  void Predict_From(int start);
  void Predict_To(int end);
#endif

 protected:
  Executor() = default;

  bool varInputMemory(const std::shared_ptr<VarDesc> &var_desc,
                      Variable *var) const;
  void InitFeedFetchList();
  void InitMemory();
  void InitCombineMemory();
  void InitNoPersistableMemory(const Tensor &input_tensor);
  void LoadMemory(void **data, const std::shared_ptr<VarDesc> var_desc,
                  LoDTensor *tensor);
#ifdef PADDLE_MOBILE_CL
  void LoadMemory(const VarDesc var_desc, float *tensorInput, char **data);
#endif

  int batch_size_;
  bool use_optimize_;
  bool lod_mode_;
  PaddleMobileConfigInternal config_;
  Program<Device> program_;
  std::shared_ptr<ProgramDesc> program_desc_;
  std::vector<std::shared_ptr<OperatorBase<Device>>> ops_of_block0_;
  std::unordered_map<std::string, int> feed_indices_;
  std::unordered_map<std::string, int> fetch_indices_;

  // for super resoltion
  DDim input_dim_last_;

#ifdef PADDLE_MOBILE_PROFILE
  struct ProfInfo {
    int tid = 0;
    uint64_t runBegin = 0UL;
    uint64_t runEnd = 0UL;
  };
#endif
};

}  // namespace framework
}  // namespace paddle_mobile