/**
 * @file llviewerobjectlist.h
 * @brief Description of LLViewerObjectList class.
 *
 * $LicenseInfo:firstyear=2001&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, 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_LLVIEWEROBJECTLIST_H
#define LL_LLVIEWEROBJECTLIST_H

#include <map>
#include <set>

// common includes
#include "llstring.h"
#include "lltrace.h"

// project includes
#include "llviewerobject.h"
#include "lleventcoro.h"
#include "llcoros.h"

class LLCamera;
class LLNetMap;
class LLDebugBeacon;
class LLVOCacheEntry;

const U32 CLOSE_BIN_SIZE = 10;
const U32 NUM_BINS = 128;

// GL name = position in object list + GL_NAME_INDEX_OFFSET so that
// we can have special numbers like zero.
const U32 GL_NAME_LAND = 0;
const U32 GL_NAME_PARCEL_WALL = 1;

const U32 GL_NAME_INDEX_OFFSET = 10;

class LLViewerObjectList
{
public:
    LLViewerObjectList();
    ~LLViewerObjectList();

    void destroy();

    // For internal use only.  Does NOT take a local id, takes an index into
    // an internal dynamic array.
    inline LLViewerObject *getObject(const S32 index);

    inline LLViewerObject *findObject(const LLUUID &id);
    LLViewerObject *createObjectViewer(const LLPCode pcode, LLViewerRegion *regionp, S32 flags = 0); // Create a viewer-side object
    LLViewerObject *createObjectFromCache(const LLPCode pcode, LLViewerRegion *regionp, const LLUUID &uuid, const U32 local_id);
    LLViewerObject *createObject(const LLPCode pcode, LLViewerRegion *regionp,
                                 const LLUUID &uuid, const U32 local_id, const LLHost &sender);

    LLViewerObject *replaceObject(const LLUUID &id, const LLPCode pcode, LLViewerRegion *regionp); // TomY: hack to switch VO instances on the fly

    bool killObject(LLViewerObject *objectp);
    void killObjects(LLViewerRegion *regionp); // Kill all objects owned by a particular region.
    void killAllObjects();

    void cleanDeadObjects(const bool use_timer = true); // Clean up the dead object list.

    // Simulator and viewer side object updates...
    void processUpdateCore(LLViewerObject* objectp, void** data, U32 block, const EObjectUpdateType update_type,
                           LLDataPacker* dpp, bool justCreated, bool from_cache = false);
    LLViewerObject* processObjectUpdateFromCache(LLVOCacheEntry* entry, LLViewerRegion* regionp);
    void processObjectUpdate(LLMessageSystem *mesgsys, void **user_data, EObjectUpdateType update_type, bool compressed=false);
    void processCompressedObjectUpdate(LLMessageSystem *mesgsys, void **user_data, EObjectUpdateType update_type);
    void processCachedObjectUpdate(LLMessageSystem *mesgsys, void **user_data, EObjectUpdateType update_type);
    void updateApparentAngles(LLAgent &agent);
    void update(LLAgent &agent);

    void fetchObjectCosts();
    void fetchPhysicsFlags();

    void updateObjectCost(LLViewerObject* object);
    void updateObjectCost(const LLUUID& object_id, F32 object_cost, F32 link_cost, F32 physics_cost, F32 link_physics_cost);
    void onObjectCostFetchFailure(const LLUUID& object_id);

    void updatePhysicsFlags(const LLViewerObject* object);
    void onPhysicsFlagsFetchFailure(const LLUUID& object_id);
    void updatePhysicsShapeType(const LLUUID& object_id, S32 type);
    void updatePhysicsProperties(const LLUUID& object_id,
                                    F32 density,
                                    F32 friction,
                                    F32 restitution,
                                    F32 gravity_multiplier);

    void shiftObjects(const LLVector3 &offset);
    void repartitionObjects();

    bool hasMapObjectInRegion(LLViewerRegion* regionp) ;
    void clearAllMapObjectsInRegion(LLViewerRegion* regionp) ;
    void renderObjectsForMap(LLNetMap &netmap);
    void renderObjectBounds(const LLVector3 &center);

    void addDebugBeacon(const LLVector3 &pos_agent, const std::string &string,
                        const LLColor4 &color=LLColor4(1.f, 0.f, 0.f, 0.5f),
                        const LLColor4 &text_color=LLColor4(1.f, 1.f, 1.f, 1.f),
                        S32 line_width = 1);
    void renderObjectBeacons();
    void resetObjectBeacons();

    void dirtyAllObjectInventory();

    void removeFromActiveList(LLViewerObject* objectp);
    void updateActive(LLViewerObject *objectp);

    void updateAvatarVisibility();

    inline S32 getNumObjects() { return (S32) mObjects.size(); }
    inline S32 getNumActiveObjects() { return (S32) mActiveObjects.size(); }

    void addToMap(LLViewerObject *objectp);
    void removeFromMap(LLViewerObject *objectp);

    void clearDebugText();

    ////////////////////////////////////////////
    //
    // Only accessed by markDead in LLViewerObject
    void cleanupReferences(LLViewerObject *objectp);

    S32 findReferences(LLDrawable *drawablep) const; // Find references to drawable in all objects, and return value.

    S32 getOrphanParentCount() const { return (S32) mOrphanParents.size(); }
    S32 getOrphanCount() const { return mNumOrphans; }
    S32 getAvatarCount() const { return mNumAvatars; }
    void orphanize(LLViewerObject *childp, U32 parent_id, U32 ip, U32 port);
    void findOrphans(LLViewerObject* objectp, U32 ip, U32 port);

public:
    // Class for keeping track of orphaned objects
    class OrphanInfo
    {
    public:
        OrphanInfo();
        OrphanInfo(const U64 parent_info, const LLUUID child_info);
        bool operator==(const OrphanInfo &rhs) const;
        bool operator!=(const OrphanInfo &rhs) const;
        U64 mParentInfo;
        LLUUID mChildInfo;
    };


    U32 mCurBin; // Current bin we're working on...

    // Statistics data (see also LLViewerStats)
    S32 mNumNewObjects;

    // if we paused in the last frame
    // used to discount stats from this frame
    bool mWasPaused;

    void getUUIDFromLocal(LLUUID &id,
                                const U32 local_id,
                                const U32 ip,
                                const U32 port);
    void setUUIDAndLocal(const LLUUID &id,
                                const U32 local_id,
                                const U32 ip,
                                const U32 port); // Requires knowledge of message system info!

    bool removeFromLocalIDTable(const LLViewerObject* objectp);
    // Used ONLY by the orphaned object code.
    U64 getIndex(const U32 local_id, const U32 ip, const U32 port);

    S32 mNumUnknownUpdates;
    S32 mNumDeadObjectUpdates;
    S32 mNumDeadObjects;
protected:
    std::vector<U64>    mOrphanParents; // LocalID/ip,port of orphaned objects
    std::vector<OrphanInfo> mOrphanChildren;    // UUID's of orphaned objects
    S32 mNumOrphans;
    S32 mNumAvatars;

    typedef std::vector<LLPointer<LLViewerObject> > vobj_list_t;

    vobj_list_t mObjects;
    std::vector<LLPointer<LLViewerObject> > mActiveObjects;

    vobj_list_t mMapObjects;

    uuid_set_t   mDeadObjects;

    std::map<LLUUID, LLPointer<LLViewerObject> > mUUIDObjectMap;

    //set of objects that need to update their cost
    uuid_set_t   mStaleObjectCost;
    uuid_set_t   mPendingObjectCost;

    //set of objects that need to update their physics flags
    uuid_set_t   mStalePhysicsFlags;
    uuid_set_t   mPendingPhysicsFlags;

    std::vector<LLDebugBeacon> mDebugBeacons;

    S32 mCurLazyUpdateIndex;

    static U32 sSimulatorMachineIndex;
    std::map<U64, U32> mIPAndPortToIndex;

    std::map<U64, LLUUID> mIndexAndLocalIDToUUID;

    friend class LLViewerObject;

private:
    static void reportObjectCostFailure(LLSD &objectList);
    void fetchObjectCostsCoro(std::string url);

    static void reportPhysicsFlagFailure(LLSD &obejectList);
    void fetchPhisicsFlagsCoro(std::string url);

};


class LLDebugBeacon
{
public:
    ~LLDebugBeacon();

    LLVector3 mPositionAgent;
    std::string mString;
    LLColor4 mColor;
    LLColor4 mTextColor;
    S32 mLineWidth;
    LLPointer<class LLHUDObject> mHUDObject;
};



// Global object list
extern LLViewerObjectList gObjectList;

// Inlines
/**
 * Note:
 * it will return NULL for offline avatar_id
 */
inline LLViewerObject *LLViewerObjectList::findObject(const LLUUID &id)
{
    auto iter = mUUIDObjectMap.find(id);
    if(iter != mUUIDObjectMap.end())
    {
        return iter->second;
    }
    else
    {
        return NULL;
    }
}

inline LLViewerObject *LLViewerObjectList::getObject(const S32 index)
{
    LLViewerObject *objectp;
    objectp = mObjects[index];
    if (objectp->isDead())
    {
        //LL_WARNS() << "Dead object " << objectp->mID << " in getObject" << LL_ENDL;
        return NULL;
    }
    return objectp;
}

inline void LLViewerObjectList::addToMap(LLViewerObject *objectp)
{
    mMapObjects.push_back(objectp);
}

inline void LLViewerObjectList::removeFromMap(LLViewerObject *objectp)
{
    std::vector<LLPointer<LLViewerObject> >::iterator iter = std::find(mMapObjects.begin(), mMapObjects.end(), objectp);
    if (iter != mMapObjects.end())
    {
        mMapObjects.erase(iter);
    }
}


#endif // LL_VIEWER_OBJECT_LIST_H