/**
* @file   llpathfindingmanager.h
* @brief  Header file for llpathfindingmanager
* @author Stinson@lindenlab.com
*
* $LicenseInfo:firstyear=2012&license=viewerlgpl$
* Second Life Viewer Source Code
* Copyright (C) 2012, Linden Research, Inc.
*
* This library 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;
* version 2.1 of the License only.
*
* 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
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
*
* Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
* $/LicenseInfo$
*/
#ifndef LL_LLPATHFINDINGMANAGER_H
#define LL_LLPATHFINDINGMANAGER_H

#include <string>
#include <map>

#include <boost/function.hpp>
#include <boost/signals2.hpp>

#include "llpathfindinglinkset.h"
#include "llpathfindingobjectlist.h"
#include "llpathfindingnavmesh.h"
#include "llsingleton.h"
#include "llcoros.h"
#include "lleventcoro.h"

class LLPathfindingNavMeshStatus;
class LLUUID;
class LLViewerRegion;

class LinksetsResponder;

class LLPathfindingManager : public LLSingleton<LLPathfindingManager>
{
    LLSINGLETON(LLPathfindingManager);
    virtual ~LLPathfindingManager();

    friend class LLNavMeshSimStateChangeNode;
    friend class NavMeshStatusResponder;
    friend class LLAgentStateChangeNode;
    friend class AgentStateResponder;
public:
    typedef enum {
        kRequestStarted,
        kRequestCompleted,
        kRequestNotEnabled,
        kRequestError
    } ERequestStatus;

    void initSystem();
    void quitSystem();

    bool isPathfindingViewEnabled() const;
    bool isPathfindingEnabledForCurrentRegion() const;
    bool isPathfindingEnabledForRegion(LLViewerRegion *pRegion) const;

    bool isAllowViewTerrainProperties() const;

    LLPathfindingNavMesh::navmesh_slot_t registerNavMeshListenerForRegion(LLViewerRegion *pRegion, LLPathfindingNavMesh::navmesh_callback_t pNavMeshCallback);
    void requestGetNavMeshForRegion(LLViewerRegion *pRegion, bool pIsGetStatusOnly);

    typedef U32 request_id_t;
    typedef boost::function<void (request_id_t, ERequestStatus, LLPathfindingObjectListPtr)> object_request_callback_t;

    void requestGetLinksets(request_id_t pRequestId, object_request_callback_t pLinksetsCallback) const;
    void requestSetLinksets(request_id_t pRequestId, const LLPathfindingObjectListPtr &pLinksetListPtr, LLPathfindingLinkset::ELinksetUse pLinksetUse, S32 pA, S32 pB, S32 pC, S32 pD, object_request_callback_t pLinksetsCallback) const;

    void requestGetCharacters(request_id_t pRequestId, object_request_callback_t pCharactersCallback) const;

    typedef boost::function<void (bool)>         agent_state_callback_t;
    typedef boost::signals2::signal<void (bool)> agent_state_signal_t;
    typedef boost::signals2::connection          agent_state_slot_t;

    agent_state_slot_t registerAgentStateListener(agent_state_callback_t pAgentStateCallback);
    void requestGetAgentState();

    typedef boost::function<void (bool)> rebake_navmesh_callback_t;
    void requestRebakeNavMesh(rebake_navmesh_callback_t pRebakeNavMeshCallback);

protected:

private:

    typedef std::map<LLUUID, LLPathfindingNavMeshPtr> NavMeshMap;

    void handleDeferredGetAgentStateForRegion(const LLUUID &pRegionUUID);
    void handleDeferredGetNavMeshForRegion(const LLUUID &pRegionUUID, bool pIsGetStatusOnly);
    void handleDeferredGetLinksetsForRegion(const LLUUID &pRegionUUID, request_id_t pRequestId, object_request_callback_t pLinksetsCallback) const;
    void handleDeferredGetCharactersForRegion(const LLUUID &pRegionUUID, request_id_t pRequestId, object_request_callback_t pCharactersCallback) const;

    void navMeshStatusRequestCoro(std::string url, U64 regionHandle, bool isGetStatusOnly);
    void navAgentStateRequestCoro(std::string url);
    void navMeshRebakeCoro(std::string url, rebake_navmesh_callback_t rebakeNavMeshCallback);
    void linksetObjectsCoro(std::string url, std::shared_ptr<LinksetsResponder> linksetsResponsderPtr, LLSD putData) const;
    void linksetTerrainCoro(std::string url, std::shared_ptr<LinksetsResponder> linksetsResponsderPtr, LLSD putData) const;
    void charactersCoro(std::string url, request_id_t requestId, object_request_callback_t callback) const;

    //void handleNavMeshStatusRequest(const LLPathfindingNavMeshStatus &pNavMeshStatus, LLViewerRegion *pRegion, bool pIsGetStatusOnly);
    void handleNavMeshStatusUpdate(const LLPathfindingNavMeshStatus &pNavMeshStatus);

    void handleAgentState(bool pCanRebakeRegion);

    LLPathfindingNavMeshPtr getNavMeshForRegion(const LLUUID &pRegionUUID);
    LLPathfindingNavMeshPtr getNavMeshForRegion(LLViewerRegion *pRegion);

    std::string getNavMeshStatusURLForCurrentRegion() const;
    std::string getNavMeshStatusURLForRegion(LLViewerRegion *pRegion) const;
    std::string getRetrieveNavMeshURLForRegion(LLViewerRegion *pRegion) const;
    std::string getRetrieveObjectLinksetsURLForCurrentRegion() const;
    std::string getChangeObjectLinksetsURLForCurrentRegion() const;
    std::string getTerrainLinksetsURLForCurrentRegion() const;
    std::string getCharactersURLForCurrentRegion() const;
    std::string getAgentStateURLForRegion(LLViewerRegion *pRegion) const;
    std::string getCapabilityURLForCurrentRegion(const std::string &pCapabilityName) const;
    std::string getCapabilityURLForRegion(LLViewerRegion *pRegion, const std::string &pCapabilityName) const;
    LLViewerRegion *getCurrentRegion() const;

    NavMeshMap           mNavMeshMap;
    agent_state_signal_t mAgentStateSignal;
};

#endif // LL_LLPATHFINDINGMANAGER_H