/*
Copyright (c) 2012, 2013, Oracle and/or its affiliates. All rights reserved.

The MySQL Connector/C++ is licensed under the terms of the GPLv2
<http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most
MySQL Connectors. There are special exceptions to the terms and
conditions of the GPLv2 as it is applied to this software, see the
FLOSS License Exception
<http://www.mysql.com/about/legal/licensing/foss-exception.html>.

This program 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; version 2 of the License.

This program 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 this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
*/


#include <stdlib.h>
#include "mysql_uri.h"
#include "mysql_util.h"

namespace sql
{
namespace mysql
{

static const char MYURI_SOCKET_PREFIX[]=	"unix://";
static const char MYURI_PIPE_PREFIX[]=		"pipe://";
static const char MYURI_TCP_PREFIX[]=		"tcp://";

static const char MYURI_HOST_BEGIN=		'[';
static const char MYURI_HOST_END=		']';

static const int DEFAULT_TCP_PORT=		3306;

/* {{{ MySQL_Uri::MySQL_Uri() -I- */
MySQL_Uri::MySQL_Uri()
	:	protocol(NativeAPI::PROTOCOL_TCP),
		port	(DEFAULT_TCP_PORT),
		/* Perhaps `localhost` has to be default. so w/out any parameter
		   driver will still connect? */
		host	(""),
		schema	("")
{}
/* }}} */


/* {{{ MySQL_Uri::Host() -I- */
const sql::SQLString & MySQL_Uri::Host()
{
	static const sql::SQLString hostValue4Pipe(".");
	static const sql::SQLString hostValue4sock(util::LOCALHOST);

	switch (Protocol())
	{
	case NativeAPI::PROTOCOL_TCP:
		return host;
	case NativeAPI::PROTOCOL_PIPE:
		return hostValue4Pipe;
	case NativeAPI::PROTOCOL_SOCKET:
		return hostValue4sock;
	}

	// throw smoething maybe?
	return host;
}
/* }}} */


/* {{{ MySQL_Uri::SocketOrPipe() -I- */
const sql::SQLString & MySQL_Uri::SocketOrPipe()
{
	if (tcpProtocol(*this))
	{
		static const sql::SQLString emptystr(util::EMPTYSTR);
		return emptystr;
	}

	return host;
}
/* }}} */


/* {{{ MySQL_Uri::setHost() -I- */
void MySQL_Uri::setHost(const sql::SQLString &h)
{
	setProtocol(NativeAPI::PROTOCOL_TCP);
	host= h.c_str();
}
/* }}} */


/* {{{ MySQL_Uri::setSocket() -I- */
void MySQL_Uri::setSocket(const sql::SQLString &s)
{
	setProtocol(NativeAPI::PROTOCOL_SOCKET);
	host= s.c_str();
}
/* }}} */


/* {{{ MySQL_Uri::setPipe() -I- */
void MySQL_Uri::setPipe(const sql::SQLString &p)
{
	setProtocol(NativeAPI::PROTOCOL_PIPE);
	host= p.c_str();
}
/* }}} */


/* {{{ MySQL_Uri::setPort() -I- */
void MySQL_Uri::setPort(unsigned int p)
{
	setProtocol(NativeAPI::PROTOCOL_TCP);
	port= p;
}


/* {{{ tcpProtocol() -I- */
bool tcpProtocol(MySQL_Uri& uri)
{
	return uri.Protocol() == NativeAPI::PROTOCOL_TCP;
}
/* }}} */


/* {{{ Parse_Uri() -I- */
/* URI formats tcp://[host]:port/schema
               unix://socket
               pipe://named_pipe
 */
bool parseUri(const sql::SQLString & str, MySQL_Uri& uri)
{
	if (!str.compare(0, sizeof(MYURI_SOCKET_PREFIX) - 1, MYURI_SOCKET_PREFIX))
	{
		uri.setSocket(str.substr(sizeof(MYURI_SOCKET_PREFIX) - 1, sql::SQLString::npos));

		return true;
	}

	if (!str.compare(0, sizeof(MYURI_PIPE_PREFIX) - 1 , MYURI_PIPE_PREFIX))
	{
		uri.setPipe(str.substr(sizeof(MYURI_PIPE_PREFIX) - 1, sql::SQLString::npos));

		return true;
	}

	sql::SQLString host;
	size_t start_sep, end_sep;

	/* i wonder how did it work with "- 1"*/
	if (!str.compare(0, sizeof(MYURI_TCP_PREFIX) - 1, MYURI_TCP_PREFIX) )
	{
		host= str.substr(sizeof(MYURI_TCP_PREFIX) - 1, sql::SQLString::npos);
	}
	else
	{
		/* allowing to have port and schema specified even w/out protocol
		   specifier("tcp://") */
		host= str.c_str();
	}

	if (host[0] == MYURI_HOST_BEGIN)
	{
		end_sep= host.find(MYURI_HOST_END);

		/* No closing ] after [*/
		if (end_sep == sql::SQLString::npos)
		{
			return false;
		}

		uri.setHost(host.substr(1, end_sep - 1));
		/* Cutting host to continue w/ port and schema reading */
		host= host.substr(end_sep + 1);
	}

	/* Looking where schema part begins */
	start_sep = host.find('/');

	if (start_sep != sql::SQLString::npos)
	{
		if ((host.length() - start_sep) > 1/*Slash*/)
		{
			uri.setSchema(host.substr(start_sep + 1, host.length() - start_sep - 1));
		}

		host= host.substr(0, start_sep);
	}
	else
	{
		uri.setSchema("");
	}

	/* Looking where port part begins*/
	start_sep = host.find_last_of(':', sql::SQLString::npos);

	if (start_sep != sql::SQLString::npos)
	{
		uri.setPort(atoi(host.substr(start_sep + 1, sql::SQLString::npos).c_str()));
		host = host.substr(0, start_sep);
	}
	else
	{
		uri.setPort(DEFAULT_TCP_PORT);
	}

	/* If host was enclosed in [], it has been already set, and "host" variable is
	   empty */
	if (host.length() > 0)
	{
		uri.setHost(host);
	}

	return true;
}


} /* namespace mysql */
} /* namespace sql */
/*
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