// 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 "fastdeploy/vision/common/processors/manager.h"
#include "fastdeploy/vision/common/processors/transform.h"
#include "fastdeploy/vision/common/result.h"

namespace fastdeploy {
namespace vision {

namespace perception {
/*! @brief Preprocessor object for Petr serials model.
 */
class FASTDEPLOY_DECL PetrPreprocessor : public ProcessorManager  {
 public:
  PetrPreprocessor() = default;
  /** \brief Create a preprocessor instance for Petr model
   *
   * \param[in] config_file Path of configuration file for deployment, e.g smoke/infer_cfg.yml
   */
  explicit PetrPreprocessor(const std::string& config_file);

  /** \brief Process the input image and prepare input tensors for runtime
   *
   * \param[in] images The input image data list, all the elements are returned by cv::imread()
   * \param[in] outputs The output tensors which will feed in runtime
   * \param[in] ims_info The shape info list, record input_shape and output_shape
   * \return true if the preprocess successed, otherwise false
   */
  bool Apply(FDMatBatch* image_batch, std::vector<FDTensor>* outputs);

  void Normalize(cv::Mat *im, const std::vector<float> &mean,
               const std::vector<float> &std, float &scale);

 protected:
  bool BuildPreprocessPipelineFromConfig();
  std::vector<std::shared_ptr<Processor>> processors_;

  bool disable_permute_ = false;

  bool initialized_ = false;

  std::string config_file_;

  float scale_ = 1.0f;
  std::vector<float> mean_;
  std::vector<float> std_;

  std::vector<float> input_k_data_;
};

}  // namespace perception
}  // namespace vision
}  // namespace fastdeploy