// summarist.h :
//

#if !defined(AGD_SUMMARIST_H__0BCA7040_8648_4F3A_9C89_694B8C36DEC9__INCLUDED_)
#define AGD_SUMMARIST_H__0BCA7040_8648_4F3A_9C89_694B8C36DEC9__INCLUDED_

#include <algorithm>    // std::sort
#include <vector>       // std::vector
#ifndef _LIBBUILD
#include <gfa/svc/common/mysqlwrap.h>
#include <gfa/svc/common/logfile.h>
#else	//	_LIBBUILD
#include "common/mysqlwrap.h"
#include "common/logfile.h"
#endif	//	_LIBBUILD

/////////////////////////////////////////////////////////////////////////////
// summarist.h - Declarations:

#define _countof(a)						(sizeof(a) / sizeof(*a))
#define _SUM_INVALID_TIMESTAMP_VALUE	((time_t)-1)
#define _SUM_TIME_WND_BASE				3600

#define _SUM_MAX_DB_NAME_LENGTH			64
#define _SUM_MAX_DB_USER_LENGTH			64
#define _SUM_MAX_DB_PASS_LENGTH			64
#define _SUM_MAX_TABLE_NAME_LENGTH		64
#define _SUM_GROUP_CONCAT_MAX_LEN		65536

/////////////////////////////////////////////////////////////////////////////

typedef struct _SUMMARIST_PARAMS
{
	char szDBName[_SUM_MAX_DB_NAME_LENGTH];
	char szDBUser[_SUM_MAX_DB_USER_LENGTH];
	char szDBPass[_SUM_MAX_DB_PASS_LENGTH];
	char szTagsTable[_SUM_MAX_TABLE_NAME_LENGTH];
	char szLogsTable[_SUM_MAX_TABLE_NAME_LENGTH];
	char szITagsView[_SUM_MAX_TABLE_NAME_LENGTH];
	const char *pszBaseDir;
	unsigned long nSampleIntv;
	unsigned long nLogIntv;
	unsigned long nWriteIntv;
}SUMMARIST_PARAMS, *LPSUMMARIST_PARAMS;
typedef const SUMMARIST_PARAMS *LPCSUMMARIST_PARAMS;

/////////////////////////////////////////////////////////////////////////////

class CSummarist
{
public:
	CSummarist(LPCSUMMARIST_PARAMS psup, CLogfile &rlf);
	virtual ~CSummarist(void);

	bool Initialze(const unsigned long *pTimeWnds, size_t nCntTimeWnds, bool bDropTables = false);
	void Release(void);
	bool Connect(CMySqlDB &rdb);
	void Close(CMySqlDB &rdb);
	
	inline unsigned long GetProcessingFrequenzy(void) const {
		return m_nProcFrequ;}
	inline size_t TimeWndCount(void) const {
		return m_vTimeWnds.size();}
	inline size_t TimeZoneOffset(void) const {
		return m_tzo;}
	unsigned long GetTimeWindow(size_t nIndex) const;
	bool GetMinMaxTimestampFromLogs(CMySqlDB &rdb, time_t &rMin, time_t &rMax) const;
	bool GetNextTimestampFromLogs(CMySqlDB &rdb, time_t tsLast, time_t &rNext) const;
	std::string CreateSumTableName(unsigned long tWnd) const;
	std::string CreateSumTableName(int nIndex) const;
	bool GetLastSummarizeTimestamp(CMySqlDB &rdb, const char *pszTableName, time_t &rtsLast) const;
	bool GetLastSummarizeTimestamp(CMySqlDB &rdb, size_t nIndex, time_t &rtsLast) const;
	time_t GetBaseTimestamp(time_t tsMinLog);
	bool GetNextTimeFrame(CMySqlDB &rdb, size_t nIndex, time_t tsLast, time_t tsBase, time_t &rtsStart, time_t &rtsEnd) const;
	bool SetNextTimeFrameStart(size_t nIndex, time_t tsStart);
	time_t GetNextDueTimeFrameStart(void) const;
	bool Summarize(CMySqlDB &rdb, size_t nIndex, time_t tsFrom, time_t tsTo);
	bool ProcessOutdated(CMySqlDB &rdb, size_t nIndex, time_t tsUpTo);

public:
	static const char* Timestamp2String(time_t t, char *pszBuffer = NULL, size_t nCbBuffer = 0);

private:
	bool InitTimeWnd(const unsigned long *pTimeWnds, size_t nCntTimeWnds);
	bool InitTables(bool bDropTables);
	bool DropTables(CMySqlDB &rdb);
    bool LockTables(CMySqlDB &rdb, const char *pszTableName);
	bool UnlockTables(CMySqlDB &rdb);
	time_t GetTimezoneOffset(CMySqlDB &rdb);
	bool CreateTagList(CMySqlDB &rdb);
	time_t ReadTimestampBase(void);
	void WriteTimestampBase(time_t ts);

private:
	CLogfile &m_rlf;
	std::vector<unsigned long> m_vTimeWnds;
	std::vector<time_t> m_vTimeFrameStart;
	std::string m_ilTagList;
	unsigned long m_nProcFrequ;
	SUMMARIST_PARAMS m_sup;
    char m_szAppDir[PATH_MAX];
    time_t m_tzo;
    time_t m_tsBase;
};

/////////////////////////////////////////////////////////////////////////////
#endif	//	!defined(AGD_SUMMARIST_H__0BCA7040_8648_4F3A_9C89_694B8C36DEC9__INCLUDED_)