/*
 * Copyright (C) 2016+     AzerothCore <www.azerothcore.org>, released under GNU GPL v2 license, you may redistribute it and/or modify it under version 2 of the License, or (at your option), any later version.
 * Copyright (C) 2008-2016 TrinityCore <http://www.trinitycore.org/>
 * Copyright (C) 2005-2009 MaNGOS <http://getmangos.com/>
 */

#include "DatabaseEnv.h"
#include "ObjectMgr.h"
#include "ScriptMgr.h"
#include "ScriptSystem.h"

ScriptPointVector const SystemMgr::_empty;

SystemMgr* SystemMgr::instance()
{
    static SystemMgr instance;
    return &instance;
}

void SystemMgr::LoadScriptWaypoints()
{
    uint32 oldMSTime = getMSTime();

    // Drop Existing Waypoint list
    m_mPointMoveMap.clear();

    uint64 uiCreatureCount = 0;

    // Load Waypoints
    QueryResult result = WorldDatabase.Query("SELECT COUNT(entry) FROM script_waypoint GROUP BY entry");
    if (result)
        uiCreatureCount = result->GetRowCount();

    LOG_INFO("server.loading", "TSCR: Loading Script Waypoints for " UI64FMTD " creature(s)...", uiCreatureCount);

    //                                     0       1         2           3           4           5
    result = WorldDatabase.Query("SELECT entry, pointid, location_x, location_y, location_z, waittime FROM script_waypoint ORDER BY pointid");

    if (!result)
    {
        LOG_INFO("server.loading", ">> Loaded 0 Script Waypoints. DB table `script_waypoint` is empty.");
        LOG_INFO("server.loading", " ");
        return;
    }

    uint32 count = 0;

    do
    {
        Field* pFields = result->Fetch();
        ScriptPointMove temp;

        temp.uiCreatureEntry   = pFields[0].GetUInt32();
        uint32 uiEntry          = temp.uiCreatureEntry;
        temp.uiPointId         = pFields[1].GetUInt32();
        temp.fX                = pFields[2].GetFloat();
        temp.fY                = pFields[3].GetFloat();
        temp.fZ                = pFields[4].GetFloat();
        temp.uiWaitTime        = pFields[5].GetUInt32();

        CreatureTemplate const* pCInfo = sObjectMgr->GetCreatureTemplate(temp.uiCreatureEntry);

        if (!pCInfo)
        {
            LOG_ERROR("sql.sql", "TSCR: DB table script_waypoint has waypoint for non-existant creature entry %u", temp.uiCreatureEntry);
            continue;
        }

        if (!pCInfo->ScriptID)
            LOG_ERROR("sql.sql", "TSCR: DB table script_waypoint has waypoint for creature entry %u, but creature does not have ScriptName defined and then useless.", temp.uiCreatureEntry);

        m_mPointMoveMap[uiEntry].push_back(temp);
        ++count;
    } while (result->NextRow());

    LOG_INFO("server.loading", ">> Loaded %u Script Waypoint nodes in %u ms", count, GetMSTimeDiffToNow(oldMSTime));
}