/*******************************************************************************
 * libretroshare/src/retroshare: rsgrouter.h                                   *
 *                                                                             *
 * libretroshare: retroshare core library                                      *
 *                                                                             *
 * Copyright 2013 by Cyril Soler <contact@retroshare.cc>                *
 *                                                                             *
 * This program is free software: you can redistribute it and/or modify        *
 * it under the terms of the GNU Lesser General Public License as              *
 * published by the Free Software Foundation, either version 3 of the          *
 * License, or (at your option) any later version.                             *
 *                                                                             *
 * 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 Lesser General Public License for more details.                         *
 *                                                                             *
 * You should have received a copy of the GNU Lesser General Public License    *
 * along with this program. If not, see <https://www.gnu.org/licenses/>.       *
 *                                                                             *
 *******************************************************************************/
#pragma once

#include "util/rsdir.h"
#include "util/rsdeprecate.h"
#include "retroshare/rsids.h"
#include "retroshare/rsgxsifacetypes.h"
#include "rsitems/rsserviceids.h"

typedef RsGxsId  GRouterKeyId ;	// we use SSLIds, so that it's easier in the GUI to mix up peer ids with grouter ids.
typedef uint32_t GRouterServiceId ;
typedef uint64_t GRouterMsgPropagationId ;

class GRouterClientService ;
class RsGRouterGenericDataItem ;

class RsGRouter
{
public:
    // This is the interface file for the global router service.
    //
    struct GRouterRoutingCacheInfo
    {
        GRouterMsgPropagationId mid ;
        std::set<RsPeerId>      local_origin;
        GRouterKeyId            destination ;
        rstime_t                  routing_time;
        rstime_t                  last_tunnel_attempt_time;
        rstime_t                  last_sent_time;
        bool                    receipt_available ;
        uint32_t                duplication_factor ;
        uint32_t                data_status ;
        uint32_t                tunnel_status ;
        uint32_t                data_size ;
        Sha1CheckSum            item_hash ;
    };

    struct GRouterPublishedKeyInfo
    {
        std::string  	description_string ;
        RsGxsId 	authentication_key ;
        uint32_t     	service_id ;
    };

    struct GRouterRoutingMatrixInfo
    {
        // Probabilities of reaching a given key for each friend.
        // This concerns all known keys.
        //
        std::map<GRouterKeyId, std::vector<float> > per_friend_probabilities ;

        // List of friend ids in the same order. Should roughly correspond to the friends that are currently online.
        //
        std::vector<RsPeerId> friend_ids ;

        // List of own published keys, with associated service ID
        //
        std::map<Sha1CheckSum,GRouterPublishedKeyInfo> published_keys ;
    };

    //===================================================//
    //                  Debugging info                   //
    //===================================================//

    virtual bool getRoutingCacheInfo(std::vector<GRouterRoutingCacheInfo>& infos) =0;
    virtual bool getRoutingMatrixInfo(GRouterRoutingMatrixInfo& info) =0;

    // retrieve the routing probabilities

    //===================================================//
    //         Communication to other services.          //
    //===================================================//

    virtual bool sendData(const RsGxsId& destination, const GRouterServiceId& client_id, const uint8_t *data, uint32_t data_size, const RsGxsId& signing_id, GRouterMsgPropagationId& id) =0;
    virtual bool cancel(GRouterMsgPropagationId mid) =0;

    virtual bool registerKey(const RsGxsId& authentication_id, const GRouterServiceId& client_id,const std::string& description_string)=0 ;

    //===================================================//
    //         Routage feedback from other services      //
    //===================================================//

    virtual void addRoutingClue(const GRouterKeyId& destination, const RsPeerId& source) =0;
};

// To access the GRouter from anywhere
//
extern RsGRouter *rsGRouter ;
