#ifndef ANSOCRBASE_H
#define ANSOCRBASE_H
#define ANSOCR_API __declspec(dllexport)
#pragma once
#include "opencv2/core.hpp"
#include "opencv2/imgcodecs.hpp"
#include "opencv2/imgproc.hpp"
#include <iostream>
#include <vector>
#include "LabVIEWHeader/extcode.h"
#include "ANSLicense.h"
#include <map>
#include <regex>
namespace ANSCENTER {

	// ── ALPR Enums ──────────────────────────────────────────────────────
	enum OCRMode {
		OCR_GENERAL = 0,
		OCR_ALPR = 1
	};

	enum ALPRCharClass {
		CHAR_DIGIT = 0,
		CHAR_LATIN_ALPHA = 1,
		CHAR_ALPHANUMERIC = 2,
		CHAR_HIRAGANA = 3,
		CHAR_KATAKANA = 4,
		CHAR_KANJI = 5,
		CHAR_CJK_ANY = 6,
		CHAR_ANY = 7
	};

	// ── ALPR Structs ────────────────────────────────────────────────────
	struct ALPRZone {
		std::string name;
		int row = 0;
		int col = 0;
		ALPRCharClass charClass = CHAR_ANY;
		int minLength = 1;
		int maxLength = 10;
		std::string validationRegex;
		std::map<std::string, std::string> corrections;
	};

	struct ALPRPlateFormat {
		std::string name;
		Country country = JAPAN;
		int numRows = 2;
		std::vector<ALPRZone> zones;
		float rowSplitThreshold = 0.3f;
	};

	struct ALPRResult {
		bool valid = false;
		std::string formatName;
		std::string fullPlateText;
		std::map<std::string, std::string> parts;
		float confidence = 0.0f;
		cv::Rect plateBox;
	};

	struct OCRModelConfig {
		bool			userGPU = true;
		bool			useTensorRT = false;
		int				gpuId = 0;
		int				gpuMemory = 4000;
		int             cpuThreads = 10;
		bool			enableMKLDNN = false;
		bool			ensureASCII = true;
		OCRLanguage     ocrLanguage;
		std::string	    precisionType;
		std::string	    ocrType;
		std::string		limitType;

		bool			useDetector = true;
		bool			useRecognizer = true;
		bool			useCLS = true;
		bool			useTable = false;
		bool			useLayout = false;

		std::string		detectionModelDir;
		std::string     detectionModelFile;
		std::string     detectionModelParam;
		std::string		detectionScoreMode;


		std::string		recognizerModelDir;
		std::string		recognizerModelFile;
		std::string		recognizerModelParam;
		std::string		recogizerCharDictionaryPath;

		std::string		clsModelDir;
		std::string		clsModelFile;
		std::string		clsModelParam;


		std::string		layoutModelDir;
		std::string		layourDictionaryPath;
		std::string		tableModelDir;
		std::string		tableCharDictionaryPath;

		int				limitSideLen = 960;
		double			detectionDBThreshold = 0.3;
		double			detectionBoxThreshold = 0.6;
		double			detectionDBUnclipRatio = 1.5;
		bool            useDilation = false;
		bool            useAngleCLS = false;
		double			clsThreshold = 0.9;
		int				clsBatchNumber = 1;
		int				recognizerBatchNum = 6;
		int				recoginzerImageHeight = 48;
		int				recoginzerImageWidth = 320;
		double			layoutScoreThreshold = 0.5;
		double			layoutNMSThreshold = 0.5;
		int				tableModelMaxLengh = 488;
		int				tableBatchNum = 1;
		bool			mergeNoSpanStructure = true;
	};
	struct OCRObject
	{
		int classId{ 0 };
		int trackId{ 0 };
		std::string className{};
		float confidence{ 0.0 };
		cv::Rect box{};
		std::vector<cv::Point2f> polygon;		// polygon that contain x1 ,y1,x2,y2,x3,y3,x4,y4
		std::vector<float> kps{};				// Containing keypoints
		cv::Mat mask{};							// jpeg string of the mask
		std::string extraInfo;					// More information such as facial recognition
		std::string cameraId;
		//std::string attributes;					// Attributes information in JSON string
	};
	class ANSOCR_API ANSOCRBase {
	protected:
		bool            _licenseValid{ false };
		bool			_isInitialized{ false };
		std::string     _licenseKey;
		std::string     _modelFolder;
		std::string     _modelConfigFile;
		OCRModelConfig  _modelConfig;
		int				_engineMode; //0: Auto detect, 1 GPU, 2 CPU
		SPDLogger& _logger = SPDLogger::GetInstance("OCR", false);

		// ALPR settings
		OCRMode                     _ocrMode = OCR_GENERAL;
		Country                 _alprCountry = JAPAN;
		std::vector<ALPRPlateFormat> _alprFormats;

		void            CheckLicense();
		[[nodiscard]] bool			Init(const std::string& licenseKey, OCRModelConfig modelConfig, const std::string& modelZipFilePath, const std::string& modelZipPassword, int engineMode);
	public:
		[[nodiscard]] virtual bool Initialize(const std::string& licenseKey, OCRModelConfig modelConfig, const std::string& modelZipFilePath, const std::string& modelZipPassword, int engineMode);
		[[nodiscard]] virtual std::vector<ANSCENTER::OCRObject> RunInference(const cv::Mat& input) = 0;
		[[nodiscard]] virtual std::vector<ANSCENTER::OCRObject> RunInference(const cv::Mat& input, const std::string& cameraId) = 0;
		[[nodiscard]] virtual std::vector<ANSCENTER::OCRObject> RunInference(const cv::Mat& input, const std::vector<cv::Rect>& Bbox) = 0;
		[[nodiscard]] virtual std::vector<ANSCENTER::OCRObject> RunInference(const cv::Mat& input, const std::vector<cv::Rect>& Bbox, const std::string &cameraId) = 0;

		// Run recognizer only on a pre-cropped text image (skips detection)
		// Returns recognized text and confidence. Default returns empty.
		virtual std::pair<std::string, float> RecognizeText(const cv::Mat& croppedImage) { return {"", 0.0f}; }

		// ALPR configuration methods
		void SetOCRMode(OCRMode mode);
		OCRMode GetOCRMode() const;
		void SetCountry(Country country);
		Country GetCountry() const;
		void SetALPRFormat(const ALPRPlateFormat& format);
		void AddALPRFormat(const ALPRPlateFormat& format);
		void ClearALPRFormats();
		void LoadDefaultFormats(Country country);
		const std::vector<ALPRPlateFormat>& GetALPRFormats() const;

		~ANSOCRBase() {
			try {

			}
			catch (std::exception& e) {
				std::cout << "ANSOCRBase::Destroy()" << e.what();
			}

		};
		[[nodiscard]] virtual bool Destroy() = 0;
	};
	class ANSOCRUtility
	{
	public:
		[[nodiscard]] static std::string OCRDetectionToJsonString(const std::vector<OCRObject>& dets);
		[[nodiscard]] static std::vector<cv::Rect> GetBoundingBoxes(const std::string& strBBoxes);
		[[nodiscard]] static std::string PolygonToString(const std::vector<cv::Point2f>& polygon);
		[[nodiscard]] static std::vector<cv::Point2f> RectToNormalizedPolygon(const cv::Rect& rect, float imageWidth, float imageHeight);
		[[nodiscard]] static std::string  KeypointsToString(const std::vector<float>& kps);

		// ALPR post-processing
		[[nodiscard]] static std::vector<ALPRResult> ALPRPostProcessing(
			const std::vector<OCRObject>& ocrResults,
			const std::vector<ALPRPlateFormat>& formats,
			int imageWidth, int imageHeight,
			ANSOCRBase* engine = nullptr,
			const cv::Mat& originalImage = cv::Mat());
		[[nodiscard]] static std::string ALPRResultToJsonString(const std::vector<ALPRResult>& results);

		// UTF-8 character classification helpers
		static uint32_t NextUTF8Codepoint(const std::string& str, size_t& pos);
		static bool IsCharClass(uint32_t codepoint, ALPRCharClass charClass);
	private:
	};
}

// Original signature — backward compatible with third-party apps built against older DLL
extern "C" ANSOCR_API int		   CreateANSOCRHandle(ANSCENTER::ANSOCRBase** Handle, const char* licenseKey, const char* modelFilePath,
	const char* modelFileZipPassword, int language, int engineMode, int gpuId = 0,
	double detectorDBThreshold = 0.3, double detectorDBBoxThreshold = 0.6, double detectorDBUnclipRatio = 1.5,
	double classifierThreshold = 0.9, int useDilation = 0);
// Extended version with limitSideLen parameter — new callers should use this
extern "C" ANSOCR_API int		   CreateANSOCRHandleEx(ANSCENTER::ANSOCRBase** Handle, const char* licenseKey, const char* modelFilePath,
	const char* modelFileZipPassword, int language, int engineMode, int gpuId = 0,
	double detectorDBThreshold = 0.3, double detectorDBBoxThreshold = 0.6, double detectorDBUnclipRatio = 1.5,
	double classifierThreshold = 0.9, int useDilation = 0, int limitSideLen = 960);
extern "C" ANSOCR_API std::string  RunInference(ANSCENTER::ANSOCRBase** Handle, unsigned char* jpeg_string, int32 bufferLength);
extern "C" ANSOCR_API std::string  RunInferenceWithCamID(ANSCENTER::ANSOCRBase** Handle, unsigned char* jpeg_string, int32 bufferLength, const char* cameraId);
extern "C" ANSOCR_API int		   RunInferenceCV(ANSCENTER::ANSOCRBase** Handle, const cv::Mat &image, std::string &ocrResult);

extern "C" ANSOCR_API std::string  RunInferenceBinary(ANSCENTER::ANSOCRBase** Handle, unsigned char* jpeg_bytes, unsigned int width, unsigned int height);
extern "C" ANSOCR_API int          ReleaseANSOCRHandle(ANSCENTER::ANSOCRBase** Handle);
extern "C" ANSOCR_API std::string  RunInferenceImagePath(ANSCENTER::ANSOCRBase** Handle, const char* imageFilePath);
extern "C" ANSOCR_API std::string  RunInferenceInCroppedImages(ANSCENTER::ANSOCRBase** Handle, unsigned char* jpeg_string, int32 bufferLength, const char* strBboxes);
extern "C" ANSOCR_API std::string  RunInferenceInCroppedImagesWithCamID(ANSCENTER::ANSOCRBase** Handle, unsigned char* jpeg_string, int32 bufferLength, const char* strBboxes, const char* cameraId);

//// For LabVIEW API
extern "C" ANSOCR_API int          RunInference_LV(ANSCENTER::ANSOCRBase** Handle, unsigned char* jpeg_string, int32 bufferLength, LStrHandle detectionResult);
extern "C" ANSOCR_API int          RunInference_LVWithCamID(ANSCENTER::ANSOCRBase** Handle, unsigned char* jpeg_string, int32 bufferLength, const char* cameraId,LStrHandle detectionResult);

extern "C" ANSOCR_API int          RunInferenceBinary_LV(ANSCENTER::ANSOCRBase** Handle, unsigned char* jpeg_bytes, unsigned int width, unsigned int height, LStrHandle detectionResult);
extern "C" ANSOCR_API int		   RunInferenceImagePath_LV(ANSCENTER::ANSOCRBase** Handle, const char* imageFilePath, LStrHandle detectionResult);
extern "C" ANSOCR_API int		   ANSOCRUnitTest(const char* modelFilePath, const char* imageFilePath, LStrHandle detectionResult);
extern "C" ANSOCR_API int		   RunInferenceInCroppedImages_LV(ANSCENTER::ANSOCRBase** Handle, unsigned char* jpeg_string, int32 bufferLength, const char* strBboxes, LStrHandle detectionResult);
extern "C" ANSOCR_API int		   RunInferenceInCroppedImages_LVWithCamID(ANSCENTER::ANSOCRBase** Handle, unsigned char* jpeg_string, int32 bufferLength, const char* strBboxes, const char* cameraId, LStrHandle detectionResult);
extern "C" ANSOCR_API int		   RunInferenceComplete_LV(ANSCENTER::ANSOCRBase** Handle, cv::Mat** cvImage, const char* cameraId, int getJpegString, int jpegImageSize, LStrHandle detectionResult, LStrHandle imageStr);
extern "C" ANSOCR_API int		   RunInferencesComplete_LV(ANSCENTER::ANSOCRBase** Handle, cv::Mat** cvImage, const char* cameraId, int maxImageSize, const char* strBboxes, LStrHandle detectionResult);

// ALPR configuration API
extern "C" ANSOCR_API int         SetANSOCRMode(ANSCENTER::ANSOCRBase** Handle, int ocrMode);
extern "C" ANSOCR_API int         SetANSOCRCountry(ANSCENTER::ANSOCRBase** Handle, int country);
extern "C" ANSOCR_API int         SetANSOCRALPRFormat(ANSCENTER::ANSOCRBase** Handle, const char* formatJson);

// Unicode conversion utilities for LabVIEW wrapper classes
extern "C" ANSOCR_API int         ANSOCR_ConvertUTF8ToUTF16LE(const char* utf8Str, LStrHandle result);
extern "C" ANSOCR_API int         ANSOCR_ConvertUTF16LEToUTF8(const unsigned char* utf16leBytes, int byteLen, LStrHandle result);

// V2 Create / Release — handle as uint64_t by value (no pointer-to-pointer)
extern "C" ANSOCR_API uint64_t    CreateANSOCRHandleEx_V2(const char* licenseKey, const char* modelFilePath,
	const char* modelFileZipPassword, int language, int engineMode, int gpuId,
	double detectorDBThreshold, double detectorDBBoxThreshold, double detectorDBUnclipRatio,
	double classifierThreshold, int useDilation, int limitSideLen);
extern "C" ANSOCR_API uint64_t    CreateANSOCRHandle_V2(const char* licenseKey, const char* modelFilePath,
	const char* modelFileZipPassword, int language, int engineMode, int gpuId,
	double detectorDBThreshold, double detectorDBBoxThreshold, double detectorDBUnclipRatio,
	double classifierThreshold, int useDilation);
extern "C" ANSOCR_API int         ReleaseANSOCRHandle_V2(uint64_t handleVal);

#endif