/*************************************************************
/* Copyright (C), 2008-2010, StoneU Tech. Co., Ltd.
/* 文件名:		DBInterface.h
/* 作者:		Jesse			 
/* 创建日期:	2010-08-02
/* 版本号:		V1.0
/* 描述:		实现多种数据库的支持
/* 其它:  
/* 主要类模块:  CDBInterface
/* 历史修改记录: 
		作者           时间           版本           描述
	   Jesse         10/08/02          1.0	      创建这个模块
***************************************************************/
#include "stdafx.h"
#include "DBInterface.h"
#include "Global.h"

namespace DBInterface
{
	CDBInterface* CDBInterface::m_pDBInterface = NULL;

	// 静态成员函数，提供全局访问的接口
	CDBInterface* CDBInterface::GetInstancePtr()
	{
		if( NULL == m_pDBInterface )
		{
			m_pDBInterface = new CDBInterface();
		}

		return m_pDBInterface;
	}

    // 设置数据库类型
	void CDBInterface::SetDBType(char *pDBType)
	{
		strcpy(m_chDBType, pDBType);
	}

	//获取表最大的ID, 通用函数
	INT CDBInterface::GetMaxID( CHAR *pTableName, CHAR *pFieldName, CHAR *pMaxID )
	{
		CHAR strSQLText[MAX_SQL_LENGTH + 1] = "";
		list<string> list1;
		list<string>::iterator it;

		sprintf(strSQLText, "select max(%s) as maxid from %s", pFieldName, pTableName);

		int nRet = CDBConnection::GetInstancePtr()->GetFieldValueList1(strSQLText, list1);
		if( 0 == list1.size() )
		{
			return 0;
		}

		if( nRet != -1 )
		{
			strcpy(pMaxID, list1.begin()->c_str());
		}

		for( it = list1.begin(); it != list1.end(); )
		{
			list1.erase(it++);
		}

		return nRet;
	}

	// 获取Summary资料
	INT CDBInterface::GetSummaryInfo(char *pUid, char *pVarDesc, char *pID)
	{
		CHAR strSQLText[MAX_SQL_LENGTH + 1] = "";
		list<string> list1;
		list<string>::iterator it;

		if (!_stricmp(m_chDBType, "SQL SERVER"))
		{ 
			sprintf(strSQLText, "select top 1 id from t_summary_log where varuid = \'%s\' and varname = \'%s\'", pUid, pVarDesc);
		}
		else if (!_stricmp(m_chDBType, "ACCESS97"))
		{
			sprintf(strSQLText, "select top 1 id from t_summary_log where varuid = \'%s\' and varname = \'%s\'", pUid, pVarDesc);
		}
		else if (!_stricmp(m_chDBType, "ACCESS2000"))
		{
			sprintf(strSQLText, "select top 1 id from t_summary_log where varuid = \'%s\' and varname = \'%s\'", pUid, pVarDesc);
		}
		else if(!_stricmp(m_chDBType, "PGSQL"))
		{
			sprintf(strSQLText, "select id from t_summary_log where varuid = \'%s\' and varname = \'%s\' limit 1", pUid, pVarDesc);
		}

		int nRet = CDBConnection::GetInstancePtr()->GetFieldValueList1(strSQLText, list1);
		if( 0 == list1.size() )
		{
			return 0;
		}

		if( nRet != -1 )
		{
			strcpy(pID, list1.begin()->c_str());
		}

		for( it = list1.begin(); it != list1.end(); )
		{
			list1.erase(it++);
		}

		return nRet;
	}

	//插入Summary记录
	INT CDBInterface::InsertSummaryRecord(
								CHAR* pDevName,				// 设备名称
								CHAR* pHappenTime,			// 发生时间
								CHAR* pMemo,				// 备注
								CHAR *pVarDesc,				// 变量描述
								double dbCurrValue,			// 当前值
								CHAR* pVarUid,				// 设备Uid
								CHAR* pVarName				// 变量名称
							)
	{
		CHAR strSQLText[MAX_SQL_LENGTH + 1] = "";
		int iMaxID;
		CHAR chMaxID[10] = {0};
		GetMaxID("t_summary_log", "id", chMaxID);

		if( 0 == atoi(chMaxID) )
		{
			iMaxID = 1;
		}
		else
		{
			iMaxID = atoi(chMaxID) + 1;
		}

		sprintf(strSQLText, "insert into t_summary_log(devname, happentime," \
			"memos, id, type_desc, curr_value, varuid, varname) values(" \
			"\'%s\', \'%s\', \'%s\', %d, \'%s\', %.1f, \'%s\', \'%s\')", 
			pDevName, pHappenTime, pMemo, iMaxID, pVarDesc, dbCurrValue, pVarUid, pVarName);

		//LOG4C((LOG_NOTICE, "%s", strSQLText));

	    return CDBConnection::GetInstancePtr()->Execute(strSQLText);
	}

	//更新Summary记录
	INT CDBInterface::EditSummaryRecord( 
								CHAR *pDevName,				// 设备名称
								CHAR *pHappenTime,			// 发生时间
								CHAR* pMemo,				// 备注
								int iID,					// ID
								CHAR* pVarDesc,				// 变量描述
								double dbCurrValue,			// 当前值
								CHAR* pVarUid,				// 设备Uid
								CHAR* pVarName				// 变量名称
							)
	{
		CHAR strSQLText[MAX_SQL_LENGTH + 1] = "";

		sprintf(strSQLText, "update t_summary_log set devname = \'%s\', happentime = \'%s\'," \
			"memos = \'%s\', type_desc = \'%s\', curr_value = %.1f, varuid = \'%s\', varname = \'%s\' where id = %d", 
			pDevName, pHappenTime, pMemo, pVarDesc, dbCurrValue, pVarUid, pVarName, iID);

	    return CDBConnection::GetInstancePtr()->Execute(strSQLText);
	}

	//更新Summary记录
	INT CDBInterface::EditSummaryRecord( 
								CHAR *pDevName,				// 设备名称
								CHAR *pHappenTime,			// 发生时间
								CHAR* pMemo,				// 备注
								CHAR* pVarDesc,				// 变量描述
								double dbCurrValue,			// 当前值
								CHAR* pVarUid,				// 设备Uid
								CHAR* pVarName				// 变量名称
							)
	{
		CHAR strSQLText[MAX_SQL_LENGTH + 1] = "";

		sprintf(strSQLText, "update t_summary_log set devname = \'%s\', happentime = \'%s\'," \
			"memos = \'%s\', type_desc = \'%s\', curr_value = %.1f, varuid = \'%s\', varname = \'%s\' where varname = \'%s\'", 
			pDevName, pHappenTime, pMemo, pVarDesc, dbCurrValue, pVarUid, pVarName, pVarName);

		//LOG4C((LOG_NOTICE, "%s", strSQLText));

	    return CDBConnection::GetInstancePtr()->Execute(strSQLText);
	}

};