/* Copyright (C) 2006,2007 ScriptDev2 <https://scriptdev2.svn.sourceforge.net/>
* 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
*/

#include "../sc_defines.h"

#define SPELL_DEATHTOUCH                5
#define SAY_AGGRO                        "This area is closed!"

struct MANGOS_DLL_DECL npc_guardianAI : public ScriptedAI
{
    npc_guardianAI(Creature *c) : ScriptedAI(c) {EnterEvadeMode();}
    bool InCombat;

    void EnterEvadeMode()
    {
        InCombat = false;
        m_creature->RemoveAllAuras();
        m_creature->DeleteThreatList();
        m_creature->CombatStop();
        DoGoHome();
        m_creature->SetFlag(UNIT_FIELD_FLAGS, UNIT_FLAG_NON_ATTACKABLE);
    }


    void AttackStart(Unit *who)
    {
        if (!who)
            return;

        if (who->isTargetableForAttack() && who!= m_creature)
        {
            //Say our dialog
            if(!InCombat)
            {
                DoYell(SAY_AGGRO,LANG_UNIVERSAL,NULL);
                InCombat = true;
            }

            DoStartMeleeAttack(who);
        }
    }

    void MoveInLineOfSight(Unit *who)
    {
        if (!who || m_creature->getVictim())
            return;

        if (who->isTargetableForAttack() && who->isInAccessablePlaceFor(m_creature) && m_creature->IsHostileTo(who))
        {
            float attackRadius = (m_creature->GetAttackDistance(who) /2);
            if (m_creature->IsWithinDistInMap(who, attackRadius) && m_creature->GetDistanceZ(who) <= 1 && m_creature->IsWithinLOSInMap(who))
            {
                if(who->HasStealthAura())
                    who->RemoveSpellsCausingAura(SPELL_AURA_MOD_STEALTH);

                //Begin melee attack if we are within range
                DoStartMeleeAttack(who);
            }
        }
    }
    void UpdateAI(const uint32 diff)
    {
        //Return since we have no target
        if (!m_creature->SelectHostilTarget() || !m_creature->getVictim())
            return;

        if (m_creature->isAttackReady())
        {
            m_creature->CastSpell(m_creature->getVictim(),SPELL_DEATHTOUCH, true);
            m_creature->resetAttackTimer();
        }
    }
};

CreatureAI* GetAI_npc_guardian(Creature *_Creature)
{
    return new npc_guardianAI (_Creature);
}

void AddSC_npc_guardian()
{
    Script *newscript;
    newscript = new Script;
    newscript->Name="npc_guardian";
    newscript->GetAI = GetAI_npc_guardian;
    m_scripts[nrscripts++] = newscript;
}