/*
 * This file is part of the AzerothCore Project. See AUTHORS file for Copyright information
 *
 * 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, see <http://www.gnu.org/licenses/>.
 */

#include "PassiveAI.h"
#include "Creature.h"

PassiveAI::PassiveAI(Creature* c) : CreatureAI(c) { me->SetReactState(REACT_PASSIVE); }
PossessedAI::PossessedAI(Creature* c) : CreatureAI(c) { me->SetReactState(REACT_PASSIVE); }
NullCreatureAI::NullCreatureAI(Creature* c) : CreatureAI(c) { me->SetReactState(REACT_PASSIVE); }

int32 NullCreatureAI::Permissible(Creature const* creature)
{
    if (creature->HasNpcFlag(UNIT_NPC_FLAG_SPELLCLICK))
        return PERMIT_BASE_PROACTIVE + 50;

    if (creature->IsTrigger())
        return PERMIT_BASE_PROACTIVE;

    return PERMIT_BASE_IDLE;
}

void PassiveAI::UpdateAI(uint32)
{
    if (me->IsInCombat() && me->getAttackers().empty())
        EnterEvadeMode(EVADE_REASON_NO_HOSTILES);
}

void PossessedAI::AttackStart(Unit* target)
{
    me->Attack(target, true);
}

void PossessedAI::UpdateAI(uint32 /*diff*/)
{
    if (me->GetVictim())
    {
        if (!me->IsValidAttackTarget(me->GetVictim()))
            me->AttackStop();
        else
            DoMeleeAttackIfReady();
    }
}

void PossessedAI::JustDied(Unit* /*u*/)
{
    // We died while possessed, disable our loot
    me->RemoveDynamicFlag(UNIT_DYNFLAG_LOOTABLE);
}

void PossessedAI::KilledUnit(Unit*  /*victim*/)
{
    // We killed a creature, disable victim's loot
    //if (victim->IsCreature())
    //    victim->RemoveDynamicFlag(UNIT_DYNFLAG_LOOTABLE);
}

void CritterAI::JustEngagedWith(Unit* who)
{
    if (!me->HasUnitState(UNIT_STATE_FLEEING))
    {
        me->SetControlled(true, UNIT_STATE_FLEEING, who);
    }
}

void CritterAI::MovementInform(uint32 type, uint32 /*id*/)
{
    if (type == TIMED_FLEEING_MOTION_TYPE)
    {
        EnterEvadeMode(EVADE_REASON_OTHER);
    }
}

void CritterAI::EnterEvadeMode(EvadeReason why)
{
    if (me->HasUnitState(UNIT_STATE_FLEEING))
    {
        me->SetControlled(false, UNIT_STATE_FLEEING);
    }

    CreatureAI::EnterEvadeMode(why);
}

int32 CritterAI::Permissible(Creature const* creature)
{
    if (creature->IsCritter() && !creature->HasUnitTypeMask(UNIT_MASK_GUARDIAN))
        return PERMIT_BASE_PROACTIVE;

    return PERMIT_BASE_NO;
}

void TriggerAI::IsSummonedBy(WorldObject* summoner)
{
    if (me->m_spells[0])
        me->CastSpell(me, me->m_spells[0], false, 0, 0, summoner ? summoner->GetGUID() : ObjectGuid::Empty);
}

int32 TriggerAI::Permissible(Creature const* creature)
{
    if (creature->IsTrigger() && creature->m_spells[0])
        return PERMIT_BASE_SPECIAL;

    return PERMIT_BASE_NO;
}