/*
 * libretroshare/src/pqi: p3cfgmgr.h
 *
 * 3P/PQI network interface for RetroShare.
 *
 * Copyright 2007-2008 by Robert Fernie.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License Version 2 as published by the Free Software Foundation.
 *
 * This library 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
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
 * USA.
 *
 * Please report all bugs and problems to "retroshare@lunamutt.com".
 *
 */



#ifndef P3_CONFIG_MGR_HEADER
#define P3_CONFIG_MGR_HEADER

#include <string>
#include <map>

#include "pqi/pqi_base.h"
#include "pqi/pqiindic.h"
#include "pqi/pqinetwork.h"
#include "util/rsthreads.h"

/***** Configuration Management *****
 *
 * we need to store:
 * (1) Certificates.
 * (2) List of Friends / Net Configuration
 * (3) Stun List. / DHT peers.
 * (4) general config.
 *
 *
 * At top level we need:
 *
 * - type / filename / size / hash -
 * and the file signed...
 *
 *
 */

/**** THESE are STORED in CONFIGURATION FILES....
 * Cannot be changed
 *
 *********************/

const uint32_t CONFIG_TYPE_GENERAL 	    = 0x0001;
const uint32_t CONFIG_TYPE_PEERS 	    = 0x0002;
const uint32_t CONFIG_TYPE_FSERVER 	    = 0x0003;
const uint32_t CONFIG_TYPE_MSGS 	       = 0x0004;
const uint32_t CONFIG_TYPE_CACHE_OLDID  = 0x0005;

/* new FileTransfer */
const uint32_t CONFIG_TYPE_FT_SHARED 	 = 0x0007;
const uint32_t CONFIG_TYPE_FT_EXTRA_LIST= 0x0008;
const uint32_t CONFIG_TYPE_FT_CONTROL 	 = 0x0009;
const uint32_t CONFIG_TYPE_FT_DWLQUEUE	 = 0x000A;

/* turtle router */
const uint32_t CONFIG_TYPE_TURTLE	 	 = 0x0020;

/* wish these ids where higher...
 * may move when switch to v0.5
 */
const uint32_t CONFIG_TYPE_RANK_LINK 	 = 0x0011;
const uint32_t CONFIG_TYPE_CHAT 	       = 0x0012;

/* standard services */
const uint32_t CONFIG_TYPE_QBLOG 	= 0x0101;
const uint32_t CONFIG_TYPE_FORUMS 	= 0x0102;
const uint32_t CONFIG_TYPE_CHANNELS 	= 0x0103;

/* CACHE ID Must be at the END so that other configurations
 * are loaded First (Cache Config --> Cache Loading)
 */
const uint32_t CONFIG_TYPE_CACHE 	= 0xff01;

class p3ConfigMgr;
class p3AuthMgr;

class pqiConfig
{
	public:
	pqiConfig(uint32_t t);
virtual ~pqiConfig();

virtual bool	loadConfiguration(std::string &loadHash) = 0;
virtual bool	saveConfiguration() = 0;

uint32_t   Type();
std::string Filename();
std::string Hash();

	protected:

void	IndicateConfigChanged();
void	setHash(std::string h);

	RsMutex cfgMtx;

	private:

void    setFilename(std::string name);
bool    HasConfigChanged(uint16_t idx);

	Indicator ConfInd;

	uint32_t    type;
	std::string filename;
	std::string hash;

	friend class p3ConfigMgr;
	/* so it can access:
	 * setFilename() and HasConfigChanged()
	 */
};


/**** MUTEX NOTE
 * None - because no-one calls any functions
 * besides tick() when the system is running.
 */

class p3ConfigMgr
{
	public:
	p3ConfigMgr(p3AuthMgr *am, std::string bdir, std::string fname, std::string signame);

void	tick();
void	saveConfiguration();
void	loadConfiguration();
void	addConfiguration(std::string file, pqiConfig *conf);

	/* saves config, and disables further saving
	 * used for exiting the system
	 */
void	completeConfiguration();

	private:


	/* these are constants - so shouldn't need mutex */
	p3AuthMgr *mAuthMgr;

const std::string basedir;
const std::string metafname;
const std::string metasigfname;

	RsMutex cfgMtx; /* below is protected */

bool	mConfigSaveActive;
std::map<uint32_t, pqiConfig *> configs;
};


class p3Config: public pqiConfig
{
	public:

	p3Config(uint32_t t);

virtual bool	loadConfiguration(std::string &loadHash);
virtual bool	saveConfiguration();

	protected:

	/* Key Functions to be overloaded for Full Configuration */
virtual RsSerialiser *setupSerialiser() = 0;
virtual std::list<RsItem *> saveList(bool &cleanup) = 0;
virtual bool	loadList(std::list<RsItem *> load) = 0;
/**
 * callback for mutex unlocking
 * in derived classes (should only be needed if cleanup = false)
 */
virtual void    saveDone() { return; }

}; /* end of p3Config */


class p3GeneralConfig: public p3Config
{
	public:
	p3GeneralConfig();

// General Configuration System
std::string 	getSetting(std::string opt);
void 		setSetting(std::string opt, std::string val);

	protected:

	/* Key Functions to be overloaded for Full Configuration */
virtual RsSerialiser *setupSerialiser();
virtual std::list<RsItem *> saveList(bool &cleanup);
virtual bool	loadList(std::list<RsItem *> load);

	private:

	/* protected by pqiConfig mutex as well! */
std::map<std::string, std::string> settings;
};







#endif // P3_CONFIG_MGR_HEADER