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

namespace fastdeploy {
namespace vision {

namespace detection {
/*! @brief Postprocessor object for PaddleDet serials model.
 */
class FASTDEPLOY_DECL PaddleDetPostprocessor {
 public:
  PaddleDetPostprocessor() = default;
  /** \brief Process the result of runtime and fill to ClassifyResult structure
   *
   * \param[in] tensors The inference result from runtime
   * \param[in] result The output result of detection
   * \return true if the postprocess successed, otherwise false
   */
  bool Run(const std::vector<FDTensor>& tensors,
           std::vector<DetectionResult>* result);

  /// Apply box decoding and nms step for the outputs for the model.This is
  /// only available for those model exported without box decoding and nms.
  void ApplyDecodeAndNMS();

  bool DecodeAndNMSApplied();

  /// Set scale_factor_ value.This is only available for those model exported
  /// without box decoding and nms.
  void SetScaleFactor(float* scale_factor_value);

 private:
  // Process mask tensor for MaskRCNN
  bool ProcessMask(const FDTensor& tensor,
                   std::vector<DetectionResult>* results);

  bool apply_decode_and_nms_ = false;
  std::vector<float> scale_factor_{1.0, 1.0};
  std::vector<float> GetScaleFactor();
  bool ProcessUnDecodeResults(const std::vector<FDTensor>& tensors,
                              std::vector<DetectionResult>* results);
};

}  // namespace detection
}  // namespace vision
}  // namespace fastdeploy