#include "ImageApplyRotation.h"

#ifdef _WIN32
#ifdef USE_HANWANG
#include<sstream>
#endif
#endif

CImageApplyRotation::CImageApplyRotation(RotationType rotation, bool isBackTransposed, int dpi, const char* tessdataPath)
	: m_rotation(rotation)
	, m_backTranspose(isBackTransposed)
	, m_dpi(dpi)
#ifdef _WIN32
#ifdef USE_HANWANG
	, m_ocr(nullptr)
#endif
#endif
{
#ifdef _WIN32
#ifdef USE_HANWANG
	if (tessdataPath != nullptr)
	{
		std::wstringstream wss;
		wss << tessdataPath;
		m_ocr = new HG_OCR(wss.str().c_str());
	}
#endif
#endif
}

CImageApplyRotation::~CImageApplyRotation()
{
#ifdef _WIN32
#ifdef USE_HANWANG
	if (m_ocr)
		delete m_ocr;
#endif
#endif
}

void CImageApplyRotation::apply(cv::Mat& pDib, int side)
{
#ifdef LOG
	FileTools::write_log("imgprc.txt", "enter CImageApplyRotation apply");
#endif // LOG
	if (pDib.empty())
	{
#ifdef LOG
		FileTools::write_log("imgprc.txt", "exit CImageApplyRotation apply");
#endif // LOG
		return;
	}

	if (m_rotation == RotationType::AutoTextOrientation)	//�Զ��ı�����ʶ��
	{
#ifdef USE_HANWANG
		cv::Mat temp;
		if (m_dpi != 200)
		{
			double scale = 200 / static_cast<double>(m_dpi);
			int new_w = static_cast<int>(pDib.cols * scale) / 4 * 4;
			int new_h = pDib.rows * scale;
			cv::resize(pDib, temp, cv::Size(new_w, new_h));
		}
		else
			temp = pDib(cv::Rect(0, 0, pDib.cols / 4 * 4, pDib.rows)).clone();

		if (temp.channels() == 3)
			cv::cvtColor(temp, temp, cv::COLOR_BGR2GRAY);
		cv::threshold(temp, temp, 180, 255, cv::THRESH_OTSU);

		int orientation = 0;
		if (m_ocr)
			orientation = m_ocr->orientation(temp.data, temp.cols, temp.rows, temp.channels());

		switch (orientation)
		{
		case 90:
			cv::transpose(pDib, pDib);
			cv::flip(pDib, pDib, 0);
			break;
		case 180:
			cv::flip(pDib, pDib, 0);
			cv::flip(pDib, pDib, 1);
			break;
		case 270:
			cv::transpose(pDib, pDib);
			cv::flip(pDib, pDib, 1);
			break;
		default:
			break;
		}
#endif
	}
	else if (m_backTranspose && side == 1)	//������ת180
	{
		if (m_rotation != RotationType::Rotate_180)	//��ת180��
		{
			if (m_rotation == RotationType::Rotate_90_clockwise || m_rotation == RotationType::Rotate_90_anti_clockwise)	//90��  -90��
			{
				transpose(pDib, pDib);
				flip(pDib, pDib, m_rotation == RotationType::Rotate_90_clockwise ? 0 : 1);
			}
			else
			{
				flip(pDib, pDib, 0);
				flip(pDib, pDib, 1);
			}
		}
	}
	else //zh
	{
		if (m_rotation == RotationType::Rotate_90_clockwise || m_rotation == RotationType::Rotate_90_anti_clockwise)	//90��  -90��
		{
			transpose(pDib, pDib);
			flip(pDib, pDib, m_rotation == RotationType::Rotate_90_clockwise ? 1 : 0);
		}
		else if (m_rotation == RotationType::Rotate_180)
		{
			flip(pDib, pDib, 0);
			flip(pDib, pDib, 1);
		}
	}
#ifdef LOG
	FileTools::write_log("imgprc.txt", "exit CImageApplyRotation apply");
#endif // LOG
}

void CImageApplyRotation::apply(std::vector<cv::Mat>& mats, bool isTwoSide)
{
	(void)isTwoSide;
	int i = 0;
	for (cv::Mat& var : mats) {
		if (!var.empty()) {
			apply(var, i);
			i++;
		}
	}
}