/*
 * Copyright (C) 2008 Trinity <http://www.trinitycore.org/>
 *
 * Thanks to the original authors: MaNGOS <http://www.mangosproject.org/>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */

/** \file
    \ingroup world
*/

#include "Log.h"
#include "Database/DatabaseEnv.h"
#include "Platform/Define.h"
#include "MapManager.h"
#include "ObjectAccessor.h"
#include "GlobalEvents.h"
#include "ObjectDefines.h"
#include "Corpse.h"

/// Handle periodic erase of corpses and bones
static void CorpsesErase(bool bones,uint32 delay)
{
    ///- Get the list of eligible corpses/bones to be removed
    //No SQL injection (uint32 and enum)
    QueryResult *result = CharacterDatabase.PQuery("SELECT guid,position_x,position_y,map,player FROM corpse WHERE UNIX_TIMESTAMP()-time > '%u' AND corpse_type %s '0'", delay, (bones ? "=" : "<>") );

    if(result)
    {
        do
        {
            Field *fields = result->Fetch();
            uint32 guidlow = fields[0].GetUInt32();
            float positionX = fields[1].GetFloat();
            float positionY = fields[2].GetFloat();
            uint32 mapid    = fields[3].GetUInt32();
            uint64 player_guid = MAKE_NEW_GUID(fields[4].GetUInt32(), 0, HIGHGUID_PLAYER);

            uint64 guid = MAKE_NEW_GUID(guidlow, 0, HIGHGUID_CORPSE);

            sLog.outDebug("[Global event] Removing %s %u (X:%f Y:%f Map:%u).",(bones?"bones":"corpse"),guidlow,positionX,positionY,mapid);

            /// Resurrectable - convert corpses to bones
            if(!bones)
            {
                if(!ObjectAccessor::Instance().ConvertCorpseForPlayer(player_guid))
                {
                    sLog.outDebug("Corpse %u not found in world. Delete from DB.",guidlow);
                    CharacterDatabase.PExecute("DELETE FROM corpse WHERE guid = '%u'",guidlow);
                }
            }
            else
                ///- or delete bones
            {
                MapManager::Instance().RemoveBonesFromMap(mapid, guid, positionX, positionY);

                ///- remove bones from the database
                CharacterDatabase.PExecute("DELETE FROM corpse WHERE guid = '%u'",guidlow);
            }
        } while (result->NextRow());

        delete result;
    }
}

/// not thread guarded variant for call from other thread
void CorpsesErase()
{
    CorpsesErase(true, 20*MINUTE);
    CorpsesErase(false,3*DAY);
}