/**
*    Copyright (C) 2008 10gen Inc.
*
*    This program is free software: you can redistribute it and/or  modify
*    it under the terms of the GNU Affero General Public License, version 3,
*    as published by the Free Software Foundation.
*
*    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 Affero General Public License for more details.
*
*    You should have received a copy of the GNU Affero General Public License
*    along with this program.  If not, see <http://www.gnu.org/licenses/>.
*
*    As a special exception, the copyright holders give permission to link the
*    code of portions of this program with the OpenSSL library under certain
*    conditions as described in each individual source file and distribute
*    linked combinations including the program with the OpenSSL library. You
*    must comply with the GNU Affero General Public License in all respects for
*    all of the code used other than as permitted herein. If you modify file(s)
*    with this exception, you may extend this exception to your version of the
*    file(s), but you are not obligated to do so. If you do not wish to do so,
*    delete this exception statement from your version. If you delete this
*    exception statement from all source files in the program, then also delete
*    it in the license file.
*/

#pragma once

#include <memory>

#include "mongo/base/disallow_copying.h"
#include "mongo/transport/session.h"
#include "mongo/util/decorable.h"
#include "mongo/util/net/abstract_message_port.h"
#include "mongo/util/net/hostandport.h"

namespace mongo {

class ServiceContext;

/**
 * this is the base class for Client and ClientInfo
 * Client is for mongod
 * ClientInfo is for mongos
 * They should converge slowly
 * The idea is this has the basic api so that not all code has to be duplicated
 */
class ClientBasic : public Decorable<ClientBasic> {
    MONGO_DISALLOW_COPYING(ClientBasic);

public:
    bool getIsLocalHostConnection() {
        if (!hasRemote()) {
            return false;
        }
        return getRemote().isLocalHost();
    }

    bool hasRemote() const {
        return _session;
    }

    HostAndPort getRemote() const {
        verify(_session);
        return _session->remote();
    }

    /**
     * Returns the ServiceContext that owns this client session context.
     */
    ServiceContext* getServiceContext() const {
        return _serviceContext;
    }

    /**
     * Returns the Session to which this client is bound, if any.
     */
    transport::Session* session() const {
        return _session;
    }

    static ClientBasic* getCurrent();

protected:
    ClientBasic(ServiceContext* serviceContext, transport::Session* session);
    ~ClientBasic();

private:
    ServiceContext* const _serviceContext;
    transport::Session* const _session;
};
}