#pragma once

#include <fsdk/IRefCounted.h>
#include <fsdk/Types/Detection.h>
#include <fsdk/Types/Human.h>
#include <fsdk/Types/HumanLandmarks.h>
#include <fsdk/Types/Image.h>
#include <fsdk/Types/Ref.h>
#include <fsdk/Types/Span.h>

#include <cstddef>

namespace fsdk {

#ifndef DOXYGEN_SHOULD_SKIP_THIS
	DECLARE_SMARTPTR(IHumanDetectionBatch);
#endif

	/**
	 * @brief Human detection result batch interface.
	 * */
	struct IHumanDetectionBatch : public IRefCounted {
		/**
		 * @brief Returns size.
		 * */
		virtual size_t getSize() const noexcept = 0;

		/**
		 * @brief Returns size of the results for the target index.
		 * @param [in] imageIndex index of the image.
		 * */
		virtual size_t getSize(size_t imageIndex) const noexcept = 0;

		/**
		 * @brief Returns detected Human.
		 * @param [in] image source image.
		 * @param [in] imageIndex index of the image.
		 * @param [in] detectionIndex index of the detection.
		 * @return Detected Human.
		 * @see Human and Image for details.
		 * @note image format must be R8G8B8, @see Format.
		 * @note Result Human could be invalid if no humans were
		 * detected on the target image or parameters are invalid.
		 * */
		virtual Human getHuman(const Image& image, size_t imageIndex, size_t detectionIndex) const noexcept = 0;

		/**
		 * @brief Returns detection Span.
		 * @param [in] index index of the detections Span.
		 * @return Span of detections.
		 * @see Span and Detection for details.
		 * @note all spans should be based on user owned continuous collections.
		 * @note Result Span could be empty in two cases:
		 * 1. If no humans were detected in the target image.
		 * 2. If detection request didn't contain the DCT_BOX flag. @see HumanDetectionType.
		 * */
		virtual Span<const Detection> getDetections(size_t index = 0) const noexcept = 0;

		/**
		 * @brief Returns HumanLandmarks17 Span.
		 * @param [in] index index of the HumanLandmarks17 Span.
		 * @return Span of HumanLandmarks17.
		 * @note all spans should be based on user owned continuous collections.
		 * @see Span and HumanLandmarks17 for details.
		 * @note Result Span could be empty in two cases:
		 * 1. If no humans were detected in the target image.
		 * 2. If detection request didn't contain the DCT_POINTS flag. @see HumanDetectionType.
		 * */
		virtual Span<const HumanLandmarks17> getLandmarks17(size_t index = 0) const noexcept = 0;

	};

}