/*
* This file is part of rasdaman community.
*
* Rasdaman community is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* Rasdaman community is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with rasdaman community.  If not, see <http://www.gnu.org/licenses/>.
*
* Copyright 2003, 2004, 2005, 2006, 2007, 2008, 2009 Peter Baumann /
rasdaman GmbH.
*
* For more information please see <http://www.rasdaman.org>
* or contact Peter Baumann via <baumann@rasdaman.com>.
/
/**
 * SOURCE: system_basic.cc
 *
 * MODULE: rasodmg/test
 *
 * COMMENTS:
 *		None
*/

static const char rcsid[] = "@(#)rasodmg/test,rasql: $Id: rasql.cc,v 1.5 2002/05/25 14:29:15 coman Exp $";

#include <unistd.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <iostream>
#include <fstream>
#include <stdio.h>
#include "readln.hh"
#include "rasql.hh"

static bool noMore = false;


void logo() {
	std::cout << "RasQL v0.1, (c) 2001 active knowledge GmbH." << std::endl;
	if(noMore)
		std::cout << "Option: no more" << std::endl;
	std::cout << std::endl; 
}

bool toFile(char *s) {
	std::ofstream os(file_name);
	if(!os) 
		return false;
	os << s;
	return true;
}

void filter(void) {
	execlp(filter_prog, filter_prog, filter_params, 0);
	perror("exec");	
	exit(1);
}


void query(void) {
	execlp(query_prog, query_prog, 
	       server_param, server_name, 
	       base_param, base_name, 
	       file_param, file_name, 
	       0);
	perror("exec");
	exit(1);
}

bool process(char* s) {
	int p[2];	
	if(strcmp(s, "exit") == 0)		
		return false;
	if(strcmp(s, "quit") == 0)		
		return false;

	if(!toFile(s)) {
		std::cerr << "toFile: error opening file " << file_name << std::endl;
		return true;			
	}

	if(noMore) {
		if(!fork())
			query();
	}
	else {
		pipe(p);	
		if(!fork()) {
			close(p[1]);	
			dup2(p[0], 0);
			filter();		
		}
		else if(!fork()) {
			close(p[0]);
			dup2(p[1], 1);
			query();	
		}	
		else {
			close(p[0]);
			close(p[1]);		
		}
	}

	while(wait(0) > 0);
	return true;
}

int main(int argc, char **argv) {	
	if(--argc && strcmp(*(++argv), "-nomore") == 0) 
		noMore = true;

	logo();
		
	ReadLn l(process, "RasQL> ");
	l.loop();
	std::cout << std::endl;
	return 0;
}