/*
 * Legal Notice
 *
 * This document and associated source code (the "Work") is a part of a
 * benchmark specification maintained by the TPC.
 *
 * The TPC reserves all right, title, and interest to the Work as provided
 * under U.S. and international laws, including without limitation all patent
 * and trademark rights therein.
 *
 * No Warranty
 *
 * 1.1 TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, THE INFORMATION
 *     CONTAINED HEREIN IS PROVIDED "AS IS" AND WITH ALL FAULTS, AND THE
 *     AUTHORS AND DEVELOPERS OF THE WORK HEREBY DISCLAIM ALL OTHER
 *     WARRANTIES AND CONDITIONS, EITHER EXPRESS, IMPLIED OR STATUTORY,
 *     INCLUDING, BUT NOT LIMITED TO, ANY (IF ANY) IMPLIED WARRANTIES,
 *     DUTIES OR CONDITIONS OF MERCHANTABILITY, OF FITNESS FOR A PARTICULAR
 *     PURPOSE, OF ACCURACY OR COMPLETENESS OF RESPONSES, OF RESULTS, OF
 *     WORKMANLIKE EFFORT, OF LACK OF VIRUSES, AND OF LACK OF NEGLIGENCE.
 *     ALSO, THERE IS NO WARRANTY OR CONDITION OF TITLE, QUIET ENJOYMENT,
 *     QUIET POSSESSION, CORRESPONDENCE TO DESCRIPTION OR NON-INFRINGEMENT
 *     WITH REGARD TO THE WORK.
 * 1.2 IN NO EVENT WILL ANY AUTHOR OR DEVELOPER OF THE WORK BE LIABLE TO
 *     ANY OTHER PARTY FOR ANY DAMAGES, INCLUDING BUT NOT LIMITED TO THE
 *     COST OF PROCURING SUBSTITUTE GOODS OR SERVICES, LOST PROFITS, LOSS
 *     OF USE, LOSS OF DATA, OR ANY INCIDENTAL, CONSEQUENTIAL, DIRECT,
 *     INDIRECT, OR SPECIAL DAMAGES WHETHER UNDER CONTRACT, TORT, WARRANTY,
 *     OR OTHERWISE, ARISING IN ANY WAY OUT OF THIS OR ANY OTHER AGREEMENT
 *     RELATING TO THE WORK, WHETHER OR NOT SUCH AUTHOR OR DEVELOPER HAD
 *     ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.
 *
 * Contributors
 * - Doug Johnson
 */

/*
 *   Class representing a flat file loader.
 */
#ifndef FLAT_FILE_LOADER_H
#define FLAT_FILE_LOADER_H

#include <cstdio>
#include "BaseLoader.h"
#include "unusedflag.h"

using namespace std;

namespace TPCE {

// EGen Formatting Defaults
#ifndef DATETIME_FORMAT
#define DATETIME_FORMAT 12 // YYYY-MM-DD HH:MM:SS.mmm
#endif

#ifndef TIME_FORMAT
#define TIME_FORMAT 01 // hh:mm:ss
#endif

#ifndef DATE_FORMAT
#define DATE_FORMAT 10 // YYYY-MM-DD
#endif

#ifndef BOOLEAN_TRUE
#define BOOLEAN_TRUE "1"
#endif

#ifndef BOOLEAN_FALSE
#define BOOLEAN_FALSE "0"
#endif

#ifndef BUFFER_SIZE
#define BUFFER_SIZE 0
#endif

#ifndef FILE_OPEN_MODE_OVERWRITE
#ifdef WIN32
#define FILE_OPEN_MODE_OVERWRITE "w+"
#else
#define FILE_OPEN_MODE_OVERWRITE "w"
#endif
#endif

#ifndef FILE_OPEN_MODE_APPEND
#ifdef WIN32
#define FILE_OPEN_MODE_APPEND "a+"
#else
#define FILE_OPEN_MODE_APPEND "a"
#endif
#endif

// EGen Formatting
const int FlatFileDateTimeFormat = DATETIME_FORMAT;
const int FlatFileTimeFormat = TIME_FORMAT;
const int FlatFileDateFormat = DATE_FORMAT;
const char *const FlatFileBoolTrue = BOOLEAN_TRUE;
const char *const FlatFileBoolFalse = BOOLEAN_FALSE;

// EGen Buffering
const int FlatFileBufferSize = BUFFER_SIZE;

// EGen File Open Modes
const char *const FlatFileOpenModeOverwrite = FILE_OPEN_MODE_OVERWRITE;
const char *const FlatFileOpenModeAppend = FILE_OPEN_MODE_APPEND;

// Overwrite vs. append functionality for output flat files.
enum FlatFileOutputModes { FLAT_FILE_OUTPUT_APPEND = 0, FLAT_FILE_OUTPUT_OVERWRITE };

/*
 *   FlatLoader class.
 */
template <typename T> class CFlatFileLoader : public CBaseLoader<T> {
protected:
	FILE *hOutFile;

public:
	CFlatFileLoader(char *szFileName, FlatFileOutputModes FlatFileOutputMode);
	~CFlatFileLoader(void);

	// virtual void WriteNextRecord(const T* next_record UNUSED) {};
	// virtual void WriteNextRecord(const T& next_record UNUSED) {};
	void FinishLoad(); // finish load
};

/*
 *       The constructor.
 */
template <typename T> CFlatFileLoader<T>::CFlatFileLoader(char *szFileName, FlatFileOutputModes flatFileOutputMode) {
	if (FLAT_FILE_OUTPUT_APPEND == flatFileOutputMode) {
		hOutFile = fopen(szFileName, FlatFileOpenModeAppend);
	} else if (FLAT_FILE_OUTPUT_OVERWRITE == flatFileOutputMode) {
		hOutFile = fopen(szFileName, FlatFileOpenModeOverwrite);
	}

	if (!hOutFile) {
		throw CSystemErr(CSystemErr::eCreateFile, "CFlatFileLoader<T>::CFlatFileLoader");
	}

	if (FlatFileBufferSize > 0) {
		if (setvbuf(hOutFile, NULL, _IOFBF, FlatFileBufferSize)) {
			throw CSystemErr(CSystemErr::eCreateFile, "CFlatFileLoader<T>::CFlatFileLoader");
		}
	}
}

/*
 *       Destructor.
 */
template <typename T> CFlatFileLoader<T>::~CFlatFileLoader() {
	fclose(hOutFile);
}

/*
 *       Commit sent rows. This needs to be called after the last row has been
 * sent and before the object is destructed. Otherwise all rows will be
 * discarded.
 */
template <typename T> void CFlatFileLoader<T>::FinishLoad() {
	fflush(hOutFile);
}

} // namespace TPCE

#endif // FLAT_FILE_LOADER_H