#pragma once
/************************************************
 * @file BinaryFileStatic.h
 * @short creating, closing, writing and reading
 * from binary files
 ***********************************************/
/**
 *@short creating, closing, writing and reading from binary files
 */


#include "ansi.h"

#include <string>
#include <iomanip>
#include <string.h>

#define MAX_MASTER_FILE_LENGTH 2000


class BinaryFileStatic {
	
 public:

	/** Constructor */
	BinaryFileStatic(){};
	/** Destructor */
	virtual ~BinaryFileStatic(){};

	/**
	 * Create File Name in format fpath/fnameprefix_fx_dy_z.raw,
	 * where x is fnum, y is (dindex * numunits + unitindex) and z is findex
	 * @param fpath file path
	 * @param fnameprefix file name prefix (includes scan and position variables)
	 * @param findex file index
	 * @param frindexenable frame index enable
	 * @param fnum frame number index
	 * @param dindex readout index
	 * @param numunits number of units per readout. eg. eiger has 2 udp units per readout
	 * @param unitindex unit index
	 * @returns complete file name created
	 */
	static std::string CreateFileName(char* fpath, char* fnameprefix, uint64_t findex, bool frindexenable,
			uint64_t fnum = 0, int dindex = -1, int numunits = 1, int unitindex = 0)
	{
		std::ostringstream osfn;
		osfn << fpath << "/" << fnameprefix;
		if (dindex >= 0) osfn << "_d" << (dindex * numunits + unitindex);
		if (frindexenable) osfn << "_f" << std::setfill('0') << std::setw(12) << fnum;
		osfn << "_" << findex;
		osfn << ".raw";
		return osfn.str();
	}

	/**
	 * Create file names for master file
	 * @param fpath file path
	 * @param fnameprefix file name prefix (includes scan and position variables)
	 * @param findex file index
	 * @returns master file name
	 */
	std::string CreateMasterFileName(char* fpath, char* fnameprefix, uint64_t findex)
	{
		std::ostringstream osfn;
		osfn << fpath << "/" << fnameprefix;
		osfn << "_master";
		osfn << "_" << findex;
		osfn << ".raw";
		return osfn.str();
	}

	/**
	 * Close File
	 * @param fd file pointer
	 */
	static void CloseDataFile(FILE*& fd)
	{
		if (fd)
			fclose(fd);
		fd = 0;
	}

	/**
	 * Write data to file
	 * @param fd file pointer
	 * @param buf buffer to write from
	 * @param bsize size of buffer
	 * @returns number of elements written
	 */
	static int WriteDataFile(FILE* fd, char* buf, int bsize)
	{
		if (!fd)
			return 0;
		return fwrite(buf, 1, bsize, fd);
	}


	/**
	 * Create master files
	 * @param fd pointer to file handle
	 * @param fname master file name
	 * @param owenable overwrite enable
	 * @param attr master file attributes
	 * @returns 0 for success and 1 for fail
	 */
	static int CreateMasterDataFile(FILE*& fd, std::string fname, bool owenable,
					masterAttributes& attr)
	{
		if(!owenable){
			if (NULL == (fd = fopen((const char *) fname.c_str(), "wx"))){
				cprintf(RED,"Error in creating binary master file %s\n",fname.c_str());
				fd = 0;
				return 1;
			}
		}else if (NULL == (fd = fopen((const char *) fname.c_str(), "w"))){
			cprintf(RED,"Error in creating binary master file %s\n",fname.c_str());
			fd = 0;
			return 1;
		}
		time_t t = time(0);
		char message[MAX_MASTER_FILE_LENGTH];
		sprintf(message,
				"Version                    : %.1f\n"
				"Detector Type              : %d\n"
				"Dynamic Range              : %d\n"
				"Ten Giga                   : %d\n"
				"Image Size                 : %d bytes\n"
				"nPixelsX                   : %d pixels\n"
				"nPixelsY                   : %d pixels\n"
				"Max Frames Per File        : %u\n"
				"Total Frames               : %lld\n"
				"Exptime (ns)               : %lld\n"
				"SubExptime (ns)            : %lld\n"
				"SubPeriod(ns)              : %lld\n"
				"Period (ns)                : %lld\n"
				"Gap Pixels Enable          : %d\n"
				"Quad Enable                : %d\n"
				"Timestamp                  : %s\n\n"

				"#Frame Header\n"
				"Frame Number               : 8 bytes\n"
				"SubFrame Number/ExpLength  : 4 bytes\n"
				"Packet Number              : 4 bytes\n"
				"Bunch ID                   : 8 bytes\n"
				"Timestamp                  : 8 bytes\n"
				"Module Id                  : 2 bytes\n"
				"Row                        : 2 bytes\n"
				"Column                     : 2 bytes\n"
				"Reserved                   : 2 bytes\n"
				"Debug                      : 4 bytes\n"
				"Round Robin Number         : 2 bytes\n"
				"Detector Type              : 1 byte\n"
				"Header Version             : 1 byte\n"
				"Packets Caught Mask        : 64 bytes\n"
				,
				attr.version,
				attr.detectorType,
				attr.dynamicRange,
				attr.tenGiga,
				attr.imageSize,
				attr.nPixelsX,
				attr.nPixelsY,
				attr.maxFramesPerFile,
				(long long int)attr.totalFrames,
				(long long int)attr.exptimeNs,
				(long long int)attr.subExptimeNs,
				(long long int)attr.subPeriodNs,
				(long long int)attr.periodNs,
				attr.gapPixelsEnable,
				attr.quadEnable,
				ctime(&t));
		if (strlen(message) > MAX_MASTER_FILE_LENGTH) {
			cprintf(RED,"Master File Size %d is greater than max str size %d\n",
					(int)strlen(message), MAX_MASTER_FILE_LENGTH);
			return 1;
		}

		if (fwrite((void*)message, 1, strlen(message), fd) !=  strlen(message))
			return 1;

		BinaryFileStatic::CloseDataFile(fd);
		return 0;
	}


	/**
	 * Create File
	 * @param fd file pointer
	 * @param owenable overwrite enable
	 * @param fname complete file name
	 * @returns 0 for success and 1 for fail
	 */
	static int CreateDataFile(FILE*& fd, bool owenable, std::string fname)
	 {
		if(!owenable){
			if (NULL == (fd = fopen((const char *) fname.c_str(), "wx"))){
				FILE_LOG(logERROR) << "Could not create/overwrite file" << fname;
				fd = 0;
				return 1;
			}
		}else if (NULL == (fd = fopen((const char *) fname.c_str(), "w"))){
			FILE_LOG(logERROR) << "Could not create file" << fname;
			fd = 0;
			return 1;
		}
		//setting to no file buffering
		setvbuf(fd,NULL, _IONBF, 0);
		return 0;
	}

};