/*
 * libretroshare/src/pqi: p3peermgr.h
 *
 * 3P/PQI network interface for RetroShare.
 *
 * Copyright 2007-2011 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 MRK_PQI_PEER_MANAGER_HEADER
#define MRK_PQI_PEER_MANAGER_HEADER

#include <retroshare/rspeers.h>
#include "pqi/pqimonitor.h"
#include "pqi/pqiipset.h"
#include "pqi/pqiassist.h"

#include "pqi/p3cfgmgr.h"

#include "util/rsthreads.h"

/* RS_VIS_STATE -> specified in rspeers.h
 */

	/* Startup Modes (confirmed later) */
const uint32_t RS_NET_MODE_TRYMODE    =   0xff00;

const uint32_t RS_NET_MODE_TRY_EXT    =   0x0100;
const uint32_t RS_NET_MODE_TRY_UPNP   =   0x0200;
const uint32_t RS_NET_MODE_TRY_UDP    =   0x0400;
const uint32_t RS_NET_MODE_TRY_LOOPBACK = 0x0800;

	/* Actual State */
const uint32_t RS_NET_MODE_ACTUAL =      0x00ff;

const uint32_t RS_NET_MODE_UNKNOWN =     0x0000;
const uint32_t RS_NET_MODE_EXT =         0x0001;
const uint32_t RS_NET_MODE_UPNP =        0x0002;
const uint32_t RS_NET_MODE_UDP =         0x0004;
const uint32_t RS_NET_MODE_HIDDEN =      0x0008;
const uint32_t RS_NET_MODE_UNREACHABLE = 0x0010;


/* flags of peerStatus */
const uint32_t RS_NET_FLAGS_USE_DISC		= 0x0001;
const uint32_t RS_NET_FLAGS_USE_DHT		= 0x0002;
const uint32_t RS_NET_FLAGS_ONLINE		= 0x0004;
const uint32_t RS_NET_FLAGS_EXTERNAL_ADDR	= 0x0008;
const uint32_t RS_NET_FLAGS_STABLE_UDP		= 0x0010;
const uint32_t RS_NET_FLAGS_TRUSTS_ME 		= 0x0020;

class peerState
{
	public:
	peerState(); /* init */

	RsPeerId id;
	RsPgpId gpg_id;

	uint32_t netMode; /* EXT / UPNP / UDP / HIDDEN / INVALID */
	/* visState */
	uint16_t vs_disc;
	uint16_t vs_dht;

        struct sockaddr_storage localaddr;
        struct sockaddr_storage serveraddr;
        std::string dyndns;

        time_t lastcontact;

	/* list of addresses from various sources */
	pqiIpAddrSet ipAddrs;

	bool hiddenNode; /* all IP addresses / dyndns must be blank */
	std::string hiddenDomain;
	uint16_t    hiddenPort;

	std::string location;
	std::string name;

};

class RsPeerGroupItem;
class RsGroupInfo;

std::string textPeerState(peerState &state);

class p3LinkMgr;
class p3NetMgr;

class p3LinkMgrIMPL;
class p3NetMgrIMPL;

class p3PeerMgr
{
	public:

        p3PeerMgr() { return; }
virtual ~p3PeerMgr() { return; }

virtual bool 	addFriend(const RsPeerId &ssl_id, const RsPgpId &gpg_id, uint32_t netMode = RS_NET_MODE_UDP,
					uint16_t vsDisc = RS_VS_DISC_FULL, uint16_t vsDht = RS_VS_DHT_FULL, 
                    time_t lastContact = 0,ServicePermissionFlags = ServicePermissionFlags(RS_NODE_PERM_DEFAULT)) = 0;
virtual bool	removeFriend(const RsPeerId &ssl_id, bool removePgpId) = 0;

virtual bool	isFriend(const RsPeerId& ssl_id) = 0;

virtual bool 	getAssociatedPeers(const RsPgpId &gpg_id, std::list<RsPeerId> &ids) = 0;
virtual bool 	removeAllFriendLocations(const RsPgpId &gpgid) = 0;


	/******************** Groups **********************/
	/* This is solely used by p3peers - makes sense   */

virtual bool    addGroup(RsGroupInfo &groupInfo) = 0;
virtual bool    editGroup(const std::string &groupId, RsGroupInfo &groupInfo) = 0;
virtual bool    removeGroup(const std::string &groupId) = 0;
virtual bool    getGroupInfo(const std::string &groupId, RsGroupInfo &groupInfo) = 0;
virtual bool    getGroupInfoList(std::list<RsGroupInfo> &groupInfoList) = 0;
virtual bool    assignPeersToGroup(const std::string &groupId, const std::list<RsPgpId> &peerIds, bool assign) = 0;

    virtual bool resetOwnExternalAddressList() = 0 ;

	virtual ServicePermissionFlags servicePermissionFlags(const RsPgpId& gpg_id) =0;
	virtual ServicePermissionFlags servicePermissionFlags(const RsPeerId& ssl_id) =0;
	virtual void setServicePermissionFlags(const RsPgpId& gpg_id,const ServicePermissionFlags& flags) =0;

	/**************** Set Net Info ****************/
	/*
	 * These functions are used by:
	 * 1) p3linkmgr 
	 * 2) p3peers - reasonable
	 * 3) p3disc  - reasonable
	 */

virtual bool 	setLocalAddress(const RsPeerId &id, const struct sockaddr_storage &addr) = 0;
virtual bool 	setExtAddress(const RsPeerId &id, const struct sockaddr_storage &addr) = 0;
virtual bool    setDynDNS(const RsPeerId &id, const std::string &dyndns) = 0;
virtual bool 	addCandidateForOwnExternalAddress(const RsPeerId& from, const struct sockaddr_storage &addr) = 0;

virtual bool 	setNetworkMode(const RsPeerId &id, uint32_t netMode) = 0;
virtual bool 	setVisState(const RsPeerId &id, uint16_t vs_disc, uint16_t vs_dht) = 0;

virtual bool    setLocation(const RsPeerId &pid, const std::string &location) = 0;
virtual bool    setHiddenDomainPort(const RsPeerId &id, const std::string &domain_addr, const uint16_t domain_port) = 0;

virtual bool    updateCurrentAddress(const RsPeerId& id, const pqiIpAddress &addr) = 0;
virtual bool    updateLastContact(const RsPeerId& id) = 0;
virtual bool    updateAddressList(const RsPeerId& id, const pqiIpAddrSet &addrs) = 0;


		// THIS MUST ONLY BE CALLED BY NETMGR!!!!
virtual bool    UpdateOwnAddress(const struct sockaddr_storage &local_addr, const struct sockaddr_storage &ext_addr) = 0;

	/**************** Net Status Info ****************/
	/*
	 * MUST RATIONALISE THE DATA FROM THESE FUNCTIONS
	 * These functions are used by:
	 * 1) p3face-config ... to remove!
	 * 2) p3peers - reasonable
	 * 3) p3disc  - reasonable
	 */

virtual bool	getOwnNetStatus(peerState &state) = 0;
virtual bool	getFriendNetStatus(const RsPeerId &id, peerState &state) = 0;
virtual bool	getOthersNetStatus(const RsPeerId &id, peerState &state) = 0;

virtual bool    getPeerName(const RsPeerId &ssl_id, std::string &name) = 0;
virtual bool	getGpgId(const RsPeerId &sslId, RsPgpId &gpgId) = 0;
virtual uint32_t getConnectionType(const RsPeerId &sslId) = 0;

virtual bool    setProxyServerAddress(const struct sockaddr_storage &proxy_addr) = 0;
virtual bool    getProxyServerAddress(struct sockaddr_storage &proxy_addr) = 0;
virtual bool    getProxyServerStatus(uint32_t& status) = 0;
virtual bool    isHidden() = 0;
virtual bool    isHiddenPeer(const RsPeerId &ssl_id) = 0;
virtual bool    getProxyAddress(const RsPeerId &ssl_id, struct sockaddr_storage &proxy_addr, std::string &domain_addr, uint16_t &domain_port) = 0;


virtual int 	getFriendCount(bool ssl, bool online) = 0;

        /************* DEPRECIATED FUNCTIONS (TO REMOVE) ********/

		// Single Use Function... shouldn't be here. used by p3serverconfig.cc
virtual bool 	haveOnceConnected() = 0;


/*************************************************************************************************/
/*************************************************************************************************/
/*************************************************************************************************/
/*************************************************************************************************/


};


class p3PeerMgrIMPL: public p3PeerMgr, public p3Config
{
	public:

/************************************************************************************************/
/* EXTERNAL INTERFACE */
/************************************************************************************************/

virtual bool 	addFriend(const RsPeerId&ssl_id, const RsPgpId&gpg_id, uint32_t netMode = RS_NET_MODE_UDP,
							uint16_t vsDisc = RS_VS_DISC_FULL, uint16_t vsDht = RS_VS_DHT_FULL, 
                            time_t lastContact = 0,ServicePermissionFlags = ServicePermissionFlags(RS_NODE_PERM_DEFAULT));
virtual bool	removeFriend(const RsPeerId &ssl_id, bool removePgpId);
virtual bool	removeFriend(const RsPgpId &pgp_id);

virtual bool	isFriend(const RsPeerId &ssl_id);

virtual bool    getAssociatedPeers(const RsPgpId &gpg_id, std::list<RsPeerId> &ids);
virtual bool    removeAllFriendLocations(const RsPgpId &gpgid);


	/******************** Groups **********************/
	/* This is solely used by p3peers - makes sense   */

virtual bool    addGroup(RsGroupInfo &groupInfo);
virtual bool    editGroup(const std::string &groupId, RsGroupInfo &groupInfo);
virtual bool    removeGroup(const std::string &groupId);
virtual bool    getGroupInfo(const std::string &groupId, RsGroupInfo &groupInfo);
virtual bool    getGroupInfoList(std::list<RsGroupInfo> &groupInfoList);
virtual bool    assignPeersToGroup(const std::string &groupId, const std::list<RsPgpId> &peerIds, bool assign);

    virtual ServicePermissionFlags servicePermissionFlags(const RsPgpId& gpg_id) ;
	virtual ServicePermissionFlags servicePermissionFlags(const RsPeerId& ssl_id) ;
	virtual void setServicePermissionFlags(const RsPgpId& gpg_id,const ServicePermissionFlags& flags) ;

	/**************** Set Net Info ****************/
	/*
	 * These functions are used by:
	 * 1) p3linkmgr 
	 * 2) p3peers - reasonable
	 * 3) p3disc  - reasonable
	 */

virtual bool 	setLocalAddress(const RsPeerId &id, const struct sockaddr_storage &addr);
virtual bool 	setExtAddress(const RsPeerId &id, const struct sockaddr_storage &addr);
virtual bool    setDynDNS(const RsPeerId &id, const std::string &dyndns);
virtual bool 	addCandidateForOwnExternalAddress(const RsPeerId& from, const struct sockaddr_storage &addr) ;

virtual bool 	setNetworkMode(const RsPeerId &id, uint32_t netMode);
virtual bool 	setVisState(const RsPeerId &id, uint16_t vs_disc, uint16_t vs_dht);

virtual bool    setLocation(const RsPeerId &pid, const std::string &location);
virtual bool    setHiddenDomainPort(const RsPeerId &id, const std::string &domain_addr, const uint16_t domain_port);
	
virtual bool    updateCurrentAddress(const RsPeerId& id, const pqiIpAddress &addr);
virtual bool    updateLastContact(const RsPeerId& id);
virtual bool    updateAddressList(const RsPeerId& id, const pqiIpAddrSet &addrs);

    virtual bool resetOwnExternalAddressList() ;

		// THIS MUST ONLY BE CALLED BY NETMGR!!!!
virtual bool    UpdateOwnAddress(const struct sockaddr_storage &local_addr, const struct sockaddr_storage &ext_addr);
	/**************** Net Status Info ****************/
	/*
	 * MUST RATIONALISE THE DATA FROM THESE FUNCTIONS
	 * These functions are used by:
	 * 1) p3face-config ... to remove!
	 * 2) p3peers - reasonable
	 * 3) p3disc  - reasonable
	 */

virtual bool	getOwnNetStatus(peerState &state);
virtual bool	getFriendNetStatus(const RsPeerId &id, peerState &state);
virtual bool	getOthersNetStatus(const RsPeerId &id, peerState &state);

virtual bool    getPeerName(const RsPeerId& ssl_id, std::string& name);
virtual bool	getGpgId(const RsPeerId& sslId, RsPgpId& gpgId);
virtual uint32_t getConnectionType(const RsPeerId& sslId);

virtual bool    setProxyServerAddress(const struct sockaddr_storage &proxy_addr);
virtual bool    getProxyServerAddress(struct sockaddr_storage &proxy_addr);
virtual bool    getProxyServerStatus(uint32_t &proxy_status);
virtual bool    isHidden();
virtual bool    isHiddenPeer(const RsPeerId& ssl_id);
virtual bool    getProxyAddress(const RsPeerId& ssl_id, struct sockaddr_storage &proxy_addr, std::string &domain_addr, uint16_t &domain_port);

virtual int 	getFriendCount(bool ssl, bool online);

        /************* DEPRECIATED FUNCTIONS (TO REMOVE) ********/

		// Single Use Function... shouldn't be here. used by p3serverconfig.cc
virtual bool 	haveOnceConnected();


/************************************************************************************************/
/* Extra IMPL Functions (used by p3LinkMgr, p3NetMgr + Setup) */
/************************************************************************************************/

        p3PeerMgrIMPL(	const RsPeerId& ssl_own_id,
				  				const RsPgpId& gpg_own_id,
				  				const std::string& gpg_own_name,
				  				const std::string& ssl_own_location) ;

void	setManagers(p3LinkMgrIMPL *linkMgr, p3NetMgrIMPL *netMgr);

bool 	forceHiddenNode();
bool 	setupHiddenNode(const std::string &hiddenAddress, const uint16_t hiddenPort);

void 	tick();

const RsPeerId& getOwnId();
bool 	setOwnNetworkMode(uint32_t netMode);
bool 	setOwnVisState(uint16_t vs_disc, uint16_t vs_dht);

int 	getConnectAddresses(const RsPeerId &id, 
				struct sockaddr_storage &lAddr, struct sockaddr_storage &eAddr, 
				pqiIpAddrSet &histAddrs, std::string &dyndns);

protected:
	/* Internal Functions */

bool 	removeUnusedLocations();
bool 	removeBannedIps();

void    printPeerLists(std::ostream &out);

	protected:
/*****************************************************************/
/***********************  p3config  ******************************/
        /* Key Functions to be overloaded for Full Configuration */
	virtual RsSerialiser *setupSerialiser();
	virtual bool saveList(bool &cleanup, std::list<RsItem *>&);
	virtual void saveDone();
	virtual bool    loadList(std::list<RsItem *>& load);
/*****************************************************************/

	/* other important managers */

	p3LinkMgrIMPL *mLinkMgr;
	p3NetMgrIMPL  *mNetMgr;

private:
	RsMutex mPeerMtx; /* protects below */

	bool     mStatusChanged;

	std::list<pqiMonitor *> clients;

	peerState mOwnState;

	std::map<RsPeerId, peerState> mFriendList;	// <SSLid , peerState>
	std::map<RsPeerId, peerState> mOthersList;

	std::list<RsPeerGroupItem *> groupList;
	uint32_t lastGroupId;

	std::list<RsItem *> saveCleanupList; /* TEMPORARY LIST WHEN SAVING */

	std::map<RsPgpId, ServicePermissionFlags> mFriendsPermissionFlags ; // permission flags for each gpg key

	struct sockaddr_storage mProxyServerAddress;
    uint32_t mProxyServerStatus ;

};

#endif // MRK_PQI_PEER_MANAGER_HEADER