/*

Copyright (c) 2003, Confident Outsourcing
All rights reserved.

Redistribution and use in source and binary forms, with or without 
modification, are permitted provided that the following conditions are met:

Redistributions of source code must retain the above copyright notice, 
this list of conditions and the following disclaimer. 

Redistributions in binary form must reproduce the above copyright notice, 
this list of conditions and the following disclaimer in the documentation 
and/or other materials provided with the distribution. 

Neither the name of the Confident Outsourcing nor the names of its 
contributors may be used to endorse or promote products derived from 
this software without specific prior written permission. 

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, 
THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 
PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR 
CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, 
EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, 
PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR 
PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY 
OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 
(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 
THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

*/
#include "tocci/tocci.h"
using namespace oracle::occi;

#define OASSERT(x) if ((x)!=OCI_SUCCESS && (x)!=OCI_SUCCESS_WITH_INFO) throw(*new SQLException(errhp));

ResultSet::ResultSet():stmt(NULL),errhp(NULL) {}
ResultSet::ResultSet(OCIStmt *st, OCIError *err):
	stmt(st),
	errhp(err) {

	OCIParam *par;
	int numcols, r, i;
	text *aname;
	ub4 alen;

	r=OCIAttrGet(stmt, OCI_HTYPE_STMT, &numcols, 0, OCI_ATTR_PARAM_COUNT, errhp);
	OASSERT(r);
	/* WE NEED TO DefineByPos or something here to recieve data */
	for (i=1; i<=numcols; i++) {
			r=OCIParamGet(stmt, OCI_HTYPE_STMT, errhp, (void **)&par, i);
			alen=0;
			r=OCIAttrGet((dvoid*) par, (ub4) OCI_DTYPE_PARAM, 
					 (dvoid*) &aname, &alen, (ub4) OCI_ATTR_NAME, 
					(OCIError *) errhp );
			OASSERT(r);
			metadata.push_back(MetaData(string((char*)aname, alen)));
			OCIDescriptorFree((void*) par, OCI_DTYPE_PARAM);
	}
}

int ResultSet::next() { 
	if (stmt==NULL) return END_OF_FETCH;
	int r, numcols, datalen;
	OCIParam *par;
	OCIDefine *def;
	int i, errcode;
	short dtype;
	
	char *dptr;

	r=OCIAttrGet(stmt, OCI_HTYPE_STMT, &numcols, 0, OCI_ATTR_PARAM_COUNT, errhp);
	OASSERT(r);
	/* WE NEED TO DefineByPos or something here to recieve data */
	for (i=1; i<=numcols; i++) {
		par=NULL;
		r=OCIParamGet(stmt, OCI_HTYPE_STMT, errhp, (void **)&par, i);
		OASSERT(r);
		datalen=0;
		r=OCIAttrGet((dvoid*) par, (ub4) OCI_DTYPE_PARAM, 
                 (dvoid*) &dtype,(ub4 *) 0, (ub4) OCI_ATTR_DATA_TYPE, 
                (OCIError *) errhp );
		OASSERT(r);
		r=OCIAttrGet((dvoid*) par, (ub4) OCI_DTYPE_PARAM, (void*) &datalen, NULL, (ub4) OCI_ATTR_DATA_SIZE, 
        (OCIError *) errhp  );
		OASSERT(r);

		if (dtype!=SQLT_STR) {
			dtype=SQLT_STR;
			datalen=512;
		}
		

		if (data[i]==NULL) {data[i]=new Cell; data[i]->ptr=NULL; }
		dptr=(char *)(data[i]->ptr=realloc(data[i]->ptr, datalen+1));
		memset(data[i]->ptr, 0, datalen+1);
		data[i]->len=datalen;
		data[i]->type=dtype;
		if (data[i]->ptr==NULL) throw(*new SQLException(6, "Not enough memory"));
		def=NULL;
		r=OCIDefineByPos(stmt, &def, errhp, i, data[i]->ptr, datalen, dtype, NULL, NULL, NULL, OCI_DEFAULT);
		OASSERT(r);

		OCIDescriptorFree((void*) par, OCI_DTYPE_PARAM);
	}

	r=OCIStmtFetch(stmt, errhp, 1, OCI_FETCH_NEXT, OCI_DEFAULT);
	if (r==OCI_ERROR) {
		OCIErrorGet(errhp, 1, (text *) NULL, &errcode,
                       (ub1*)NULL, -1,  OCI_HTYPE_ERROR);
		if (errcode==1405) r=OCI_SUCCESS;
	}
	if (r==OCI_NO_DATA) return END_OF_FETCH;
	OASSERT(r);
	return DATA_AVAILABLE;
}

unsigned int ResultSet::getUInt(int pos) {
	unsigned int res=(unsigned int)getInt(pos); //i know i know ;)
	return res;
}

int ResultSet::getInt(int pos) {
	if (data[pos]==NULL) throw(*new SQLException(7, "no such column"));
	
	int len=data[pos]->len;
	int type=data[pos]->type;
	char *ptr=(char *)data[pos]->ptr;
	int res=0, r;

	switch(type) {
	case SQLT_STR:
		res=atoi(ptr);
		return res;

	case SQLT_NUM: 
		r = OCINumberToInt (errhp, (struct OCINumber*)ptr, sizeof(res), OCI_NUMBER_SIGNED, &res);
		OASSERT(r);
		return res;
		break;

	default: throw(*new SQLException(1, "Cannot cast sql type to int(unknown type.)"));
	}
	return 0;
}

const string ResultSet::getString(int pos){
	if (data[pos]==NULL) throw(*new SQLException(7, "no such column"));
	char *dptr=(char*)data[pos]->ptr;
	int e=strlen(dptr)-1;
	while(dptr[e]==' ') e--; //trim
	dptr[e+1]=0;
	return dptr;
}

const vector<MetaData>& ResultSet::getColumnListMetaData() const {
	return metadata;
}

ResultSet::~ResultSet() {
	for (map<int, Cell*>::iterator i=data.begin(); i!=data.end(); i++) {
		delete (*i).second;
	}
}