/** @file dbwebserver.h
 */

/**
*    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/>.
*/

namespace mongo {

    class Prioritizable {
    public:
        Prioritizable( double p ) : _priority(p){}
        double priority() const { return _priority; }
    private:
        double _priority;
    };
    
    class DbWebHandler : public Prioritizable {
    public:
        DbWebHandler( const string& name , double priority , bool requiresREST );
        virtual ~DbWebHandler(){}

        virtual bool handles( const string& url ) const { return url == _defaultUrl; }

        virtual bool requiresREST( const string& url ) const { return _requiresREST; }

        virtual void handle( const char *rq, // the full request
                             string url,
                             // set these and return them:
                             string& responseMsg,
                             int& responseCode,
                             vector<string>& headers, // if completely empty, content-type: text/html will be added
                             const SockAddr &from
                             ) = 0;
        
        string toString() const { return _toString; }
        static DbWebHandler * findHandler( const string& url );

    private:
        string _name;
        bool _requiresREST;
        
        string _defaultUrl;
        string _toString;

        static vector<DbWebHandler*> * _handlers;
    };

    class WebStatusPlugin : public Prioritizable {
    public:
        WebStatusPlugin( const string& secionName , double priority , const string& subheader = "" );
        virtual ~WebStatusPlugin(){}
        
        virtual void run( stringstream& ss ) = 0;
        /** called when web server stats up */
        virtual void init() = 0;

        static void initAll();
        static void runAll( stringstream& ss );
    private:
        string _name;
        string _subHeading;
        static vector<WebStatusPlugin*> * _plugins;
        
    };

    void webServerThread();
    string prettyHostName();
    
    /** @return if there are any admin users.  this should not block for long and throw if can't get a lock if needed */
    bool webHaveAdminUsers();
    
    /** @return admin user with this name.  this should not block for long and throw if can't get a lock if needed */
    BSONObj webGetAdminUser( const string& username );

};