#ifndef OPENPOSE_HAND_HAND_EXTRACTOR_CAFFE_HPP
#define OPENPOSE_HAND_HAND_EXTRACTOR_CAFFE_HPP

#include <openpose/core/common.hpp>
#include <openpose/core/enumClasses.hpp>
#include <openpose/hand/handExtractorNet.hpp>

namespace op
{
    /**
     * Hand keypoint extractor class for Caffe framework.
     */
    class OP_API HandExtractorCaffe : public HandExtractorNet
    {
    public:
        /**
         * Constructor of the HandExtractorCaffe class.
         * @param netInputSize Size at which the cropped image (where the hand is located) is resized.
         * @param netOutputSize Size of the final results. At the moment, it must be equal than netOutputSize.
         * @param modelFolder Folder where the models are located.
         * @param gpuId The GPU index (0-based) which the deep net will use.
         * @param numberScales Number of scales to run. The more scales, the slower it will be but possibly also more
         * accurate.
         * @param rangeScales The range between the smaller and bigger scale.
         */
        HandExtractorCaffe(const Point<int>& netInputSize, const Point<int>& netOutputSize,
                           const std::string& modelFolder, const int gpuId,
                           const int numberScales = 1, const float rangeScales = 0.4f,
                           const std::vector<HeatMapType>& heatMapTypes = {},
                           const ScaleMode heatMapScaleMode = ScaleMode::ZeroToOneFixedAspect,
                           const bool enableGoogleLogging = true);

        /**
         * Virtual destructor of the HandExtractor class.
         * Required to allow inheritance.
         */
        virtual ~HandExtractorCaffe();

        /**
         * This function must be call before using any other function. It must also be called inside the thread in
         * which the functions are going to be used.
         */
        void netInitializationOnThread();

        /**
         * This function extracts the hand keypoints for each detected hand in the image.
         * @param handRectangles location of the hands in the image. It is a length-variable std::vector, where
         * each index corresponds to a different person in the image. Internally the std::vector, a std::array of 2
         * elements: index 0 and 1 for left and right hand respectively. Inside each array element, a
         * op::Rectangle<float> (similar to cv::Rect for floating values) with the position of that hand (or 0,0,0,0 if
         * some hand is missing, e.g., if a specific person has only half of the body inside the image).
         * @param inputData Original image in Mat format and BGR format.
         */
        void forwardPass(const std::vector<std::array<Rectangle<float>, 2>> handRectangles, const Matrix& inputData);

    private:
        // PIMPL idiom
        // http://www.cppsamples.com/common-tasks/pimpl.html
        struct ImplHandExtractorCaffe;
        std::unique_ptr<ImplHandExtractorCaffe> upImpl;

        Array<float> getHeatMapsFromLastPass() const;

        // PIMP requires DELETE_COPY & destructor, or extra code
        // http://oliora.github.io/2015/12/29/pimpl-and-rule-of-zero.html
        DELETE_COPY(HandExtractorCaffe);
    };
}

#endif // OPENPOSE_HAND_HAND_EXTRACTOR_CAFFE_HPP