/*=============================================================================
# Filename: Server.h
# Author: Bookug Lobert 
# Mail: 1181955272@qq.com
# Last Modified: 2015-10-25 13:49
# Description: originally written by hanshuo, modified by zengli
=============================================================================*/

#ifndef _SERVER_SERVER_H
#define _SERVER_SERVER_H

#include "../Util/Util.h"
#include "../Database/Database.h"
#include "Socket.h"
#include "Operation.h"

/*
 * the Server is only at a original and simple version.
 * the following features are not supported by now:
 *     logging in with legal account and password.
 *     multiple active databases.
 *     configurable parameters with a config.xml file.
 * the following several commands are supported:
 *     load <db_name>;
 *     unload <db_name>;
 *     import <db_name> <rdf_file_path>;
 *     query <SPARQL>;
 *     show databases;
 *     exit;
 */

class Server
{
public:
    //Server();
	Server(unsigned short _port = Socket::DEFAULT_CONNECT_PORT);
    ~Server();

    bool createConnection();
    bool deleteConnection();
    void listen();

    bool response(Socket _socket, std::string& _msg);
    bool parser(std::string _raw_cmd, Operation& _ret_oprt);
    bool createDatabase(std::string _db_name, std::string _ac_name, std::string& _ret_msg);
    bool dropDatabase(std::string _db_name, std::string _ac_name, std::string& _ret_msg);
    bool loadDatabase(std::string _db_name, std::string _ac_name, std::string& _ret_msg);
    bool unloadDatabase(std::string _db_name, std::string _ac_name, std::string& _ret_msg);
    bool showDatabases(std::string _para, std::string _ac_name, std::string& _ret_msg);
    bool importRDF(std::string _db_name, std::string _ac_name, std::string _rdf_path, std::string& _ret_msg);
    //bool insertTriple(std::string _db_name, std::string _ac_name, std::string _rdf_path, std::string& _ret_msg);
	bool query(const std::string _query, std::string& _ret_msg);
	bool stopServer(std::string& _ret_msg);
	bool backup(std::string& _ret_msg);

private:
    unsigned short connectionPort;
    int connectionMaxNum;
    int databaseMaxNum;
    Socket socket;
    Database* database;
	std::string db_home;
	std::string db_suffix;

	static pthread_t start_timer();
	static bool stop_timer(pthread_t _timer);
	static void* timer(void* _args);
	static void timer_sigterm_handler(int _signal_num);

	long next_backup;
	pid_t scheduler_pid;
};

#endif // _SERVER_SERVER_H