/*######
# npc_shadowfiend
######*/
enum Shadowfiend
{
    MANA_LEECH                       = 28305,
    GLYPH_OF_SHADOWFIEND_MANA        = 58227,
    GLYPH_OF_SHADOWFIEND             = 58228
};

class npc_shadowfiend : public CreatureScript
{
	public:
		npc_shadowfiend() : CreatureScript("npc_shadowfiend") { }

	struct npc_shadowfiendAI : public ScriptedAI
	{
		npc_shadowfiendAI(Creature* creature) : ScriptedAI(creature) {}

        void Reset()
        {
            if (me->IsSummon())
                if (Unit* owner = me->ToTempSummon()->GetSummoner())
                    if (Unit* pet = owner->GetGuardianPet())
                        pet->CastSpell(pet, MANA_LEECH, true);
        }
        void DamageTaken(Unit* /*killer*/, uint32& damage)
        {
            if (me->IsSummon())
                if (Unit* owner = me->ToTempSummon()->GetSummoner())
                    if (owner->HasAura(GLYPH_OF_SHADOWFIEND) && damage >= me->GetHealth())
                        owner->CastSpell(owner, GLYPH_OF_SHADOWFIEND_MANA, true);
        }

        void UpdateAI(uint32 const /*diff*/)
        {
            if (!UpdateVictim())
                return;

            DoMeleeAttackIfReady();
        }
    };

    CreatureAI* GetAI(Creature* creature) const
    {
        return new npc_shadowfiendAI(creature);
    }
 };