// 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.

#include "fastdeploy/vision/common/processors/base.h"

#include "fastdeploy/utils/utils.h"
#include "fastdeploy/vision/common/processors/proc_lib.h"

namespace fastdeploy {
namespace vision {

bool Processor::ImplByOpenCV(FDMat* mat) {
  FDERROR << Name() << " Not Implement Yet." << std::endl;
  return false;
}

bool Processor::ImplByOpenCV(FDMatBatch* mat_batch) {
  for (size_t i = 0; i < mat_batch->mats->size(); ++i) {
    if (ImplByOpenCV(&(*(mat_batch->mats))[i]) != true) {
      return false;
    }
  }
  return true;
}

bool Processor::ImplByFlyCV(FDMat* mat) { return ImplByOpenCV(mat); }

bool Processor::ImplByFlyCV(FDMatBatch* mat_batch) {
  for (size_t i = 0; i < mat_batch->mats->size(); ++i) {
    if (ImplByFlyCV(&(*(mat_batch->mats))[i]) != true) {
      return false;
    }
  }
  return true;
}

bool Processor::ImplByCuda(FDMat* mat) {
  FDWARNING << Name()
            << " is not implemented with CUDA, will fallback to OpenCV."
            << std::endl;
  return ImplByOpenCV(mat);
}

bool Processor::ImplByCuda(FDMatBatch* mat_batch) {
  for (size_t i = 0; i < mat_batch->mats->size(); ++i) {
    if (ImplByCuda(&(*(mat_batch->mats))[i]) != true) {
      return false;
    }
  }
  return true;
}

bool Processor::ImplByCvCuda(FDMat* mat) {
  FDWARNING << Name()
            << " is not implemented with CV-CUDA, will fallback to OpenCV."
            << std::endl;
  return ImplByOpenCV(mat);
}

bool Processor::ImplByCvCuda(FDMatBatch* mat_batch) {
  for (size_t i = 0; i < mat_batch->mats->size(); ++i) {
    if (ImplByCvCuda(&(*(mat_batch->mats))[i]) != true) {
      return false;
    }
  }
  return true;
}

bool Processor::operator()(FDMat* mat) {
  ProcLib target = mat->proc_lib;
  if (mat->proc_lib == ProcLib::DEFAULT) {
    target = DefaultProcLib::default_lib;
  }
  if (target == ProcLib::FLYCV) {
#ifdef ENABLE_FLYCV
    return ImplByFlyCV(mat);
#else
    FDASSERT(false, "FastDeploy didn't compile with FlyCV.");
#endif
  } else if (target == ProcLib::CUDA) {
#ifdef WITH_GPU
    FDASSERT(mat->Stream() != nullptr,
             "CUDA processor requires cuda stream, please set stream for Mat");
    return ImplByCuda(mat);
#else
    FDASSERT(false, "FastDeploy didn't compile with WITH_GPU.");
#endif
  } else if (target == ProcLib::CVCUDA) {
#ifdef ENABLE_CVCUDA
    FDASSERT(mat->Stream() != nullptr,
             "CV-CUDA requires cuda stream, please set stream for Mat");
    return ImplByCvCuda(mat);
#else
    FDASSERT(false, "FastDeploy didn't compile with CV-CUDA.");
#endif
  }
  // DEFAULT & OPENCV
  return ImplByOpenCV(mat);
}

bool Processor::operator()(FDMat* mat, ProcLib lib) {
  mat->proc_lib = lib;
  return operator()(mat);
}

bool Processor::operator()(FDMatBatch* mat_batch) {
  ProcLib target = mat_batch->proc_lib;
  if (mat_batch->proc_lib == ProcLib::DEFAULT) {
    target = DefaultProcLib::default_lib;
  }
  if (target == ProcLib::FLYCV) {
#ifdef ENABLE_FLYCV
    return ImplByFlyCV(mat_batch);
#else
    FDASSERT(false, "FastDeploy didn't compile with FlyCV.");
#endif
  } else if (target == ProcLib::CUDA) {
#ifdef WITH_GPU
    FDASSERT(
        mat_batch->Stream() != nullptr,
        "CUDA processor requires cuda stream, please set stream for mat_batch");
    return ImplByCuda(mat_batch);
#else
    FDASSERT(false, "FastDeploy didn't compile with WITH_GPU.");
#endif
  } else if (target == ProcLib::CVCUDA) {
#ifdef ENABLE_CVCUDA
    FDASSERT(mat_batch->Stream() != nullptr,
             "CV-CUDA processor requires cuda stream, please set stream for "
             "mat_batch");
    return ImplByCvCuda(mat_batch);
#else
    FDASSERT(false, "FastDeploy didn't compile with CV-CUDA.");
#endif
  }
  // DEFAULT & OPENCV
  return ImplByOpenCV(mat_batch);
}

void EnableFlyCV() {
#ifdef ENABLE_FLYCV
  DefaultProcLib::default_lib = ProcLib::FLYCV;
  FDINFO << "Will change to use image processing library "
         << DefaultProcLib::default_lib << std::endl;
#else
  FDWARNING << "FastDeploy didn't compile with FlyCV, "
               "will fallback to use OpenCV instead."
            << std::endl;
#endif
}

void DisableFlyCV() {
  DefaultProcLib::default_lib = ProcLib::OPENCV;
  FDINFO << "Will change to use image processing library "
         << DefaultProcLib::default_lib << std::endl;
}

void SetProcLibCpuNumThreads(int threads) {
  cv::setNumThreads(threads);
#ifdef ENABLE_FLYCV
  fcv::set_thread_num(threads);
#endif
}

}  // namespace vision
}  // namespace fastdeploy