#include "npc.hpp"

#include <memory>

#include <OgreSceneNode.h>

#include <components/esm/loadmgef.hpp>
#include <components/esm/loadnpc.hpp>
#include <components/esm/npcstate.hpp>

#include "../mwbase/environment.hpp"
#include "../mwbase/world.hpp"
#include "../mwbase/mechanicsmanager.hpp"
#include "../mwbase/windowmanager.hpp"
#include "../mwbase/dialoguemanager.hpp"
#include "../mwbase/soundmanager.hpp"

#include "../mwmechanics/creaturestats.hpp"
#include "../mwmechanics/npcstats.hpp"
#include "../mwmechanics/movement.hpp"
#include "../mwmechanics/spellcasting.hpp"
#include "../mwmechanics/disease.hpp"
#include "../mwmechanics/combat.hpp"
#include "../mwmechanics/autocalcspell.hpp"
#include "../mwmechanics/difficultyscaling.hpp"

#include "../mwworld/ptr.hpp"
#include "../mwworld/actiontalk.hpp"
#include "../mwworld/actionopen.hpp"
#include "../mwworld/failedaction.hpp"
#include "../mwworld/inventorystore.hpp"
#include "../mwworld/customdata.hpp"
#include "../mwworld/physicssystem.hpp"
#include "../mwworld/cellstore.hpp"

#include "../mwrender/actors.hpp"
#include "../mwrender/renderinginterface.hpp"

#include "../mwgui/tooltips.hpp"

namespace
{
    struct NpcCustomData : public MWWorld::CustomData
    {
        MWMechanics::NpcStats mNpcStats;
        MWMechanics::Movement mMovement;
        MWWorld::InventoryStore mInventoryStore;

        virtual MWWorld::CustomData *clone() const;
    };

    MWWorld::CustomData *NpcCustomData::clone() const
    {
        return new NpcCustomData (*this);
    }

    int is_even(double d) {
        double int_part;
        modf(d / 2.0, &int_part);
        return 2.0 * int_part == d;
    }

    int round_ieee_754(double d) {
        double i = floor(d);
        d -= i;
        if(d < 0.5)
            return i;
        if(d > 0.5)
            return i + 1.0;
        if(is_even(i))
            return i;
        return i + 1.0;
    }

    void autoCalculateAttributes (const ESM::NPC* npc, MWMechanics::CreatureStats& creatureStats)
    {
        // race bonus
        const ESM::Race *race =
            MWBase::Environment::get().getWorld()->getStore().get<ESM::Race>().find(npc->mRace);

        bool male = (npc->mFlags & ESM::NPC::Female) == 0;

        int level = creatureStats.getLevel();
        for (int i=0; i<ESM::Attribute::Length; ++i)
        {
            const ESM::Race::MaleFemale& attribute = race->mData.mAttributeValues[i];
            creatureStats.setAttribute(i, male ? attribute.mMale : attribute.mFemale);
        }

        // class bonus
        const ESM::Class *class_ =
            MWBase::Environment::get().getWorld()->getStore().get<ESM::Class>().find(npc->mClass);

        for (int i=0; i<2; ++i)
        {
            int attribute = class_->mData.mAttribute[i];
            if (attribute>=0 && attribute<8)
            {
                creatureStats.setAttribute(attribute,
                    creatureStats.getAttribute(attribute).getBase() + 10);
            }
        }

        // skill bonus
        for (int attribute=0; attribute < ESM::Attribute::Length; ++attribute)
        {
            float modifierSum = 0;

            for (int j=0; j<ESM::Skill::Length; ++j)
            {
                const ESM::Skill* skill = MWBase::Environment::get().getWorld()->getStore().get<ESM::Skill>().find(j);

                if (skill->mData.mAttribute != attribute)
                    continue;

                // is this a minor or major skill?
                float add=0.2;
                for (int k=0; k<5; ++k)
                {
                    if (class_->mData.mSkills[k][0] == j)
                        add=0.5;
                }
                for (int k=0; k<5; ++k)
                {
                    if (class_->mData.mSkills[k][1] == j)
                        add=1.0;
                }
                modifierSum += add;
            }
            creatureStats.setAttribute(attribute, std::min(
                                           round_ieee_754(creatureStats.getAttribute(attribute).getBase()
                + (level-1) * modifierSum), 100) );
        }

        // initial health
        int strength = creatureStats.getAttribute(ESM::Attribute::Strength).getBase();
        int endurance = creatureStats.getAttribute(ESM::Attribute::Endurance).getBase();

        int multiplier = 3;

        if (class_->mData.mSpecialization == ESM::Class::Combat)
            multiplier += 2;
        else if (class_->mData.mSpecialization == ESM::Class::Stealth)
            multiplier += 1;

        if (class_->mData.mAttribute[0] == ESM::Attribute::Endurance
            || class_->mData.mAttribute[1] == ESM::Attribute::Endurance)
            multiplier += 1;

        creatureStats.setHealth(static_cast<int> (0.5 * (strength + endurance)) + multiplier * (creatureStats.getLevel() - 1));
    }

    /**
     * @brief autoCalculateSkills
     *
     * Skills are calculated with following formulae ( http://www.uesp.net/wiki/Morrowind:NPCs#Skills ):
     *
     * Skills: (Level - 1) × (Majority Multiplier + Specialization Multiplier)
     *
     *         The Majority Multiplier is 1.0 for a Major or Minor Skill, or 0.1 for a Miscellaneous Skill.
     *
     *         The Specialization Multiplier is 0.5 for a Skill in the same Specialization as the class,
     *         zero for other Skills.
     *
     * and by adding class, race, specialization bonus.
     */
    void autoCalculateSkills(const ESM::NPC* npc, MWMechanics::NpcStats& npcStats, const MWWorld::Ptr& ptr)
    {
        const ESM::Class *class_ =
            MWBase::Environment::get().getWorld()->getStore().get<ESM::Class>().find(npc->mClass);

        unsigned int level = npcStats.getLevel();

        const ESM::Race *race = MWBase::Environment::get().getWorld()->getStore().get<ESM::Race>().find(npc->mRace);


        for (int i = 0; i < 2; ++i)
        {
            int bonus = (i==0) ? 10 : 25;

            for (int i2 = 0; i2 < 5; ++i2)
            {
                int index = class_->mData.mSkills[i2][i];
                if (index >= 0 && index < ESM::Skill::Length)
                {
                    npcStats.getSkill(index).setBase (npcStats.getSkill(index).getBase() + bonus);
                }
            }
        }

        for (int skillIndex = 0; skillIndex < ESM::Skill::Length; ++skillIndex)
        {
            float majorMultiplier = 0.1f;
            float specMultiplier = 0.0f;

            int raceBonus = 0;
            int specBonus = 0;

            for (int raceSkillIndex = 0; raceSkillIndex < 7; ++raceSkillIndex)
            {
                if (race->mData.mBonus[raceSkillIndex].mSkill == skillIndex)
                {
                    raceBonus = race->mData.mBonus[raceSkillIndex].mBonus;
                    break;
                }
            }

            for (int k = 0; k < 5; ++k)
            {
                // is this a minor or major skill?
                if ((class_->mData.mSkills[k][0] == skillIndex) || (class_->mData.mSkills[k][1] == skillIndex))
                {
                    majorMultiplier = 1.0f;
                    break;
                }
            }

            // is this skill in the same Specialization as the class?
            const ESM::Skill* skill = MWBase::Environment::get().getWorld()->getStore().get<ESM::Skill>().find(skillIndex);
            if (skill->mData.mSpecialization == class_->mData.mSpecialization)
            {
                specMultiplier = 0.5f;
                specBonus = 5;
            }

            npcStats.getSkill(skillIndex).setBase(
                  std::min(
                    round_ieee_754(
                            npcStats.getSkill(skillIndex).getBase()
                    + 5
                    + raceBonus
                    + specBonus
                    +(int(level)-1) * (majorMultiplier + specMultiplier)), 100)); // Must gracefully handle level 0
        }

        int skills[ESM::Skill::Length];
        for (int i=0; i<ESM::Skill::Length; ++i)
            skills[i] = npcStats.getSkill(i).getBase();

        int attributes[ESM::Attribute::Length];
        for (int i=0; i<ESM::Attribute::Length; ++i)
            attributes[i] = npcStats.getAttribute(i).getBase();

        std::vector<std::string> spells = MWMechanics::autoCalcNpcSpells(skills, attributes, race);
        for (std::vector<std::string>::iterator it = spells.begin(); it != spells.end(); ++it)
            npcStats.getSpells().add(*it);
    }
}

namespace MWClass
{
    const Npc::GMST& Npc::getGmst()
    {
        static GMST gmst;
        static bool inited = false;
        if(!inited)
        {
            const MWBase::World *world = MWBase::Environment::get().getWorld();
            const MWWorld::Store<ESM::GameSetting> &store = world->getStore().get<ESM::GameSetting>();

            gmst.fMinWalkSpeed = store.find("fMinWalkSpeed");
            gmst.fMaxWalkSpeed = store.find("fMaxWalkSpeed");
            gmst.fEncumberedMoveEffect = store.find("fEncumberedMoveEffect");
            gmst.fSneakSpeedMultiplier = store.find("fSneakSpeedMultiplier");
            gmst.fAthleticsRunBonus = store.find("fAthleticsRunBonus");
            gmst.fBaseRunMultiplier = store.find("fBaseRunMultiplier");
            gmst.fMinFlySpeed = store.find("fMinFlySpeed");
            gmst.fMaxFlySpeed = store.find("fMaxFlySpeed");
            gmst.fSwimRunBase = store.find("fSwimRunBase");
            gmst.fSwimRunAthleticsMult = store.find("fSwimRunAthleticsMult");
            gmst.fJumpEncumbranceBase = store.find("fJumpEncumbranceBase");
            gmst.fJumpEncumbranceMultiplier = store.find("fJumpEncumbranceMultiplier");
            gmst.fJumpAcrobaticsBase = store.find("fJumpAcrobaticsBase");
            gmst.fJumpAcroMultiplier = store.find("fJumpAcroMultiplier");
            gmst.fJumpRunMultiplier = store.find("fJumpRunMultiplier");
            gmst.fWereWolfRunMult = store.find("fWereWolfRunMult");
            gmst.fKnockDownMult = store.find("fKnockDownMult");
            gmst.iKnockDownOddsMult = store.find("iKnockDownOddsMult");
            gmst.iKnockDownOddsBase = store.find("iKnockDownOddsBase");
            gmst.fDamageStrengthBase = store.find("fDamageStrengthBase");
            gmst.fDamageStrengthMult = store.find("fDamageStrengthMult");
            gmst.fCombatArmorMinMult = store.find("fCombatArmorMinMult");

            inited = true;
        }
        return gmst;
    }

    void Npc::ensureCustomData (const MWWorld::Ptr& ptr) const
    {
        if (!ptr.getRefData().getCustomData())
        {
            std::auto_ptr<NpcCustomData> data(new NpcCustomData);

            MWWorld::LiveCellRef<ESM::NPC> *ref = ptr.get<ESM::NPC>();

            // NPC stats
            if (!ref->mBase->mFaction.empty())
            {
                std::string faction = ref->mBase->mFaction;
                Misc::StringUtils::toLower(faction);
                if(ref->mBase->mNpdtType != ESM::NPC::NPC_WITH_AUTOCALCULATED_STATS)
                {
                    data->mNpcStats.getFactionRanks()[faction] = (int)ref->mBase->mNpdt52.mRank;
                }
                else
                {
                    data->mNpcStats.getFactionRanks()[faction] = (int)ref->mBase->mNpdt12.mRank;
                }
            }

            // creature stats
            int gold=0;
            if(ref->mBase->mNpdtType != ESM::NPC::NPC_WITH_AUTOCALCULATED_STATS)
            {
                gold = ref->mBase->mNpdt52.mGold;

                for (unsigned int i=0; i< ESM::Skill::Length; ++i)
                    data->mNpcStats.getSkill (i).setBase (ref->mBase->mNpdt52.mSkills[i]);

                data->mNpcStats.setAttribute(ESM::Attribute::Strength, ref->mBase->mNpdt52.mStrength);
                data->mNpcStats.setAttribute(ESM::Attribute::Intelligence, ref->mBase->mNpdt52.mIntelligence);
                data->mNpcStats.setAttribute(ESM::Attribute::Willpower, ref->mBase->mNpdt52.mWillpower);
                data->mNpcStats.setAttribute(ESM::Attribute::Agility, ref->mBase->mNpdt52.mAgility);
                data->mNpcStats.setAttribute(ESM::Attribute::Speed, ref->mBase->mNpdt52.mSpeed);
                data->mNpcStats.setAttribute(ESM::Attribute::Endurance, ref->mBase->mNpdt52.mEndurance);
                data->mNpcStats.setAttribute(ESM::Attribute::Personality, ref->mBase->mNpdt52.mPersonality);
                data->mNpcStats.setAttribute(ESM::Attribute::Luck, ref->mBase->mNpdt52.mLuck);

                data->mNpcStats.setHealth (ref->mBase->mNpdt52.mHealth);
                data->mNpcStats.setMagicka (ref->mBase->mNpdt52.mMana);
                data->mNpcStats.setFatigue (ref->mBase->mNpdt52.mFatigue);

                data->mNpcStats.setLevel(ref->mBase->mNpdt52.mLevel);
                data->mNpcStats.setBaseDisposition(ref->mBase->mNpdt52.mDisposition);
                data->mNpcStats.setReputation(ref->mBase->mNpdt52.mReputation);
            }
            else
            {
                gold = ref->mBase->mNpdt12.mGold;

                for (int i=0; i<3; ++i)
                    data->mNpcStats.setDynamic (i, 10);

                data->mNpcStats.setLevel(ref->mBase->mNpdt12.mLevel);
                data->mNpcStats.setBaseDisposition(ref->mBase->mNpdt12.mDisposition);
                data->mNpcStats.setReputation(ref->mBase->mNpdt12.mReputation);

                autoCalculateAttributes(ref->mBase, data->mNpcStats);
                autoCalculateSkills(ref->mBase, data->mNpcStats, ptr);
            }

            // race powers
            const ESM::Race *race = MWBase::Environment::get().getWorld()->getStore().get<ESM::Race>().find(ref->mBase->mRace);
            for (std::vector<std::string>::const_iterator iter (race->mPowers.mList.begin());
                iter!=race->mPowers.mList.end(); ++iter)
            {
                data->mNpcStats.getSpells().add (*iter);
            }

            if (data->mNpcStats.getFactionRanks().size())
            {
                static const int iAutoRepFacMod = MWBase::Environment::get().getWorld()->getStore().get<ESM::GameSetting>()
                        .find("iAutoRepFacMod")->getInt();
                static const int iAutoRepLevMod = MWBase::Environment::get().getWorld()->getStore().get<ESM::GameSetting>()
                        .find("iAutoRepLevMod")->getInt();
                int rank = data->mNpcStats.getFactionRanks().begin()->second;

                data->mNpcStats.setReputation(iAutoRepFacMod * (rank+1) + iAutoRepLevMod * (data->mNpcStats.getLevel()-1));
            }

            data->mNpcStats.getAiSequence().fill(ref->mBase->mAiPackage);

            data->mNpcStats.setAiSetting (MWMechanics::CreatureStats::AI_Hello, ref->mBase->mAiData.mHello);
            data->mNpcStats.setAiSetting (MWMechanics::CreatureStats::AI_Fight, ref->mBase->mAiData.mFight);
            data->mNpcStats.setAiSetting (MWMechanics::CreatureStats::AI_Flee, ref->mBase->mAiData.mFlee);
            data->mNpcStats.setAiSetting (MWMechanics::CreatureStats::AI_Alarm, ref->mBase->mAiData.mAlarm);

            // spells
            for (std::vector<std::string>::const_iterator iter (ref->mBase->mSpells.mList.begin());
                iter!=ref->mBase->mSpells.mList.end(); ++iter)
                data->mNpcStats.getSpells().add (*iter);

            // inventory
            data->mInventoryStore.fill(ref->mBase->mInventory, getId(ptr), "",
                                       MWBase::Environment::get().getWorld()->getStore());

            data->mNpcStats.setGoldPool(gold);

            // store
            ptr.getRefData().setCustomData (data.release());

            getInventoryStore(ptr).autoEquip(ptr); 
        }
    }

    std::string Npc::getId (const MWWorld::Ptr& ptr) const
    {
        MWWorld::LiveCellRef<ESM::NPC> *ref =
            ptr.get<ESM::NPC>();

        return ref->mBase->mId;
    }

    void Npc::adjustPosition(const MWWorld::Ptr& ptr, bool force) const
    {
        MWBase::Environment::get().getWorld()->adjustPosition(ptr, force);
    }

    void Npc::insertObjectRendering (const MWWorld::Ptr& ptr, MWRender::RenderingInterface& renderingInterface) const
    {
        renderingInterface.getActors().insertNPC(ptr);
    }

    void Npc::insertObject(const MWWorld::Ptr& ptr, MWWorld::PhysicsSystem& physics) const
    {
        physics.addActor(ptr);
        MWBase::Environment::get().getMechanicsManager()->add(ptr);
        if (getCreatureStats(ptr).isDead())
            MWBase::Environment::get().getWorld()->enableActorCollision(ptr, false);
    }

    bool Npc::isPersistent(const MWWorld::Ptr &actor) const
    {
        MWWorld::LiveCellRef<ESM::NPC>* ref = actor.get<ESM::NPC>();
        return ref->mBase->mPersistent;
    }

    std::string Npc::getModel(const MWWorld::Ptr &ptr) const
    {
        MWWorld::LiveCellRef<ESM::NPC> *ref =
            ptr.get<ESM::NPC>();
        assert(ref->mBase != NULL);

        std::string model = "meshes\\base_anim.nif";
        const ESM::Race* race = MWBase::Environment::get().getWorld()->getStore().get<ESM::Race>().find(ref->mBase->mRace);
        if(race->mData.mFlags & ESM::Race::Beast)
            model = "meshes\\base_animkna.nif";

        return model;

    }

    std::string Npc::getName (const MWWorld::Ptr& ptr) const
    {
        if(getNpcStats(ptr).isWerewolf())
        {
            const MWBase::World *world = MWBase::Environment::get().getWorld();
            const MWWorld::Store<ESM::GameSetting> &store = world->getStore().get<ESM::GameSetting>();

            return store.find("sWerewolfPopup")->getString();
        }

        MWWorld::LiveCellRef<ESM::NPC> *ref = ptr.get<ESM::NPC>();
        return ref->mBase->mName;
    }

    MWMechanics::CreatureStats& Npc::getCreatureStats (const MWWorld::Ptr& ptr) const
    {
        ensureCustomData (ptr);

        return dynamic_cast<NpcCustomData&> (*ptr.getRefData().getCustomData()).mNpcStats;
    }

    MWMechanics::NpcStats& Npc::getNpcStats (const MWWorld::Ptr& ptr) const
    {
        ensureCustomData (ptr);

        return dynamic_cast<NpcCustomData&> (*ptr.getRefData().getCustomData()).mNpcStats;
    }


    void Npc::hit(const MWWorld::Ptr& ptr, int type) const
    {
        MWBase::World *world = MWBase::Environment::get().getWorld();
        const GMST& gmst = getGmst();

        const MWWorld::Store<ESM::GameSetting> &store = world->getStore().get<ESM::GameSetting>();

        // Get the weapon used (if hand-to-hand, weapon = inv.end())
        MWWorld::InventoryStore &inv = getInventoryStore(ptr);
        MWWorld::ContainerStoreIterator weaponslot = inv.getSlot(MWWorld::InventoryStore::Slot_CarriedRight);
        MWWorld::Ptr weapon = ((weaponslot != inv.end()) ? *weaponslot : MWWorld::Ptr());
        if(!weapon.isEmpty() && weapon.getTypeName() != typeid(ESM::Weapon).name())
            weapon = MWWorld::Ptr();

        // Reduce fatigue
        // somewhat of a guess, but using the weapon weight makes sense
        const float fFatigueAttackBase = store.find("fFatigueAttackBase")->getFloat();
        const float fFatigueAttackMult = store.find("fFatigueAttackMult")->getFloat();
        const float fWeaponFatigueMult = store.find("fWeaponFatigueMult")->getFloat();
        MWMechanics::DynamicStat<float> fatigue = getCreatureStats(ptr).getFatigue();
        const float normalizedEncumbrance = getEncumbrance(ptr) / getCapacity(ptr);
        float fatigueLoss = fFatigueAttackBase + normalizedEncumbrance * fFatigueAttackMult;
        if (!weapon.isEmpty())
            fatigueLoss += weapon.getClass().getWeight(weapon) * getNpcStats(ptr).getAttackStrength() * fWeaponFatigueMult;
        fatigue.setCurrent(fatigue.getCurrent() - fatigueLoss);
        getCreatureStats(ptr).setFatigue(fatigue);

        const float fCombatDistance = store.find("fCombatDistance")->getFloat();
        float dist = fCombatDistance * (!weapon.isEmpty() ?
                               weapon.get<ESM::Weapon>()->mBase->mData.mReach :
                               store.find("fHandToHandReach")->getFloat());

        // TODO: Use second to work out the hit angle
        std::pair<MWWorld::Ptr, Ogre::Vector3> result = world->getHitContact(ptr, dist);
        MWWorld::Ptr victim = result.first;
        Ogre::Vector3 hitPosition = result.second;
        if(victim.isEmpty()) // Didn't hit anything
            return;

        const MWWorld::Class &othercls = victim.getClass();
        if(!othercls.isActor()) // Can't hit non-actors
            return;
        MWMechanics::CreatureStats &otherstats = othercls.getCreatureStats(victim);
        if(otherstats.isDead()) // Can't hit dead actors
            return;

        if(ptr.getRefData().getHandle() == "player")
            MWBase::Environment::get().getWindowManager()->setEnemy(victim);

        int weapskill = ESM::Skill::HandToHand;
        if(!weapon.isEmpty())
            weapskill = weapon.getClass().getEquipmentSkill(weapon);

        float hitchance = MWMechanics::getHitChance(ptr, victim, ptr.getClass().getSkill(ptr, weapskill));

        if((::rand()/(RAND_MAX+1.0)) > hitchance/100.0f)
        {
            othercls.onHit(victim, 0.0f, false, weapon, ptr, false);
            MWMechanics::reduceWeaponCondition(0.f, false, weapon, ptr);
            return;
        }

        bool healthdmg;
        float damage = 0.0f;
        MWMechanics::NpcStats &stats = getNpcStats(ptr);
        if(!weapon.isEmpty())
        {
            const unsigned char *attack = NULL;
            if(type == ESM::Weapon::AT_Chop)
                attack = weapon.get<ESM::Weapon>()->mBase->mData.mChop;
            else if(type == ESM::Weapon::AT_Slash)
                attack = weapon.get<ESM::Weapon>()->mBase->mData.mSlash;
            else if(type == ESM::Weapon::AT_Thrust)
                attack = weapon.get<ESM::Weapon>()->mBase->mData.mThrust;
            if(attack)
            {
                damage  = attack[0] + ((attack[1]-attack[0])*stats.getAttackStrength());
                damage *= gmst.fDamageStrengthBase->getFloat() +
                        (stats.getAttribute(ESM::Attribute::Strength).getModified() * gmst.fDamageStrengthMult->getFloat() * 0.1);
            }
            MWMechanics::adjustWeaponDamage(damage, weapon);
            MWMechanics::reduceWeaponCondition(damage, true, weapon, ptr);
            healthdmg = true;
        }
        else
        {
            // Note: MCP contains an option to include Strength in hand-to-hand damage
            // calculations. Some mods recommend using it, so we may want to include am
            // option for it.
            float minstrike = store.find("fMinHandToHandMult")->getFloat();
            float maxstrike = store.find("fMaxHandToHandMult")->getFloat();
            damage  = stats.getSkill(weapskill).getModified();
            damage *= minstrike + ((maxstrike-minstrike)*stats.getAttackStrength());

            healthdmg = (otherstats.getMagicEffects().get(ESM::MagicEffect::Paralyze).getMagnitude() > 0)
                    || otherstats.getKnockedDown();
            if(stats.isWerewolf())
            {
                healthdmg = true;
                // GLOB instead of GMST because it gets updated during a quest
                const MWWorld::Store<ESM::Global> &glob = world->getStore().get<ESM::Global>();
                damage *= glob.find("WerewolfClawMult")->mValue.getFloat();
            }
            if(healthdmg)
                damage *= store.find("fHandtoHandHealthPer")->getFloat();

            MWBase::SoundManager *sndMgr = MWBase::Environment::get().getSoundManager();
            if(stats.isWerewolf())
            {
                const ESM::Sound *sound = world->getStore().get<ESM::Sound>().searchRandom("WolfHit");
                if(sound)
                    sndMgr->playSound3D(victim, sound->mId, 1.0f, 1.0f);
            }
            else
                sndMgr->playSound3D(victim, "Hand To Hand Hit", 1.0f, 1.0f);
        }
        if(ptr.getRefData().getHandle() == "player")
        {
            skillUsageSucceeded(ptr, weapskill, 0);

            const MWMechanics::AiSequence& seq = victim.getClass().getCreatureStats(victim).getAiSequence();

            bool unaware = !seq.isInCombat()
                    && !MWBase::Environment::get().getMechanicsManager()->awarenessCheck(ptr, victim);
            if(unaware)
            {
                damage *= store.find("fCombatCriticalStrikeMult")->getFloat();
                MWBase::Environment::get().getWindowManager()->messageBox("#{sTargetCriticalStrike}");
                MWBase::Environment::get().getSoundManager()->playSound3D(victim, "critical damage", 1.0f, 1.0f);
            }
        }

        if (othercls.getCreatureStats(victim).getKnockedDown())
            damage *= store.find("fCombatKODamageMult")->getFloat();

        // Apply "On hit" enchanted weapons
        std::string enchantmentName = !weapon.isEmpty() ? weapon.getClass().getEnchantment(weapon) : "";
        if (!enchantmentName.empty())
        {
            const ESM::Enchantment* enchantment = MWBase::Environment::get().getWorld()->getStore().get<ESM::Enchantment>().find(
                        enchantmentName);
            if (enchantment->mData.mType == ESM::Enchantment::WhenStrikes)
            {
                MWMechanics::CastSpell cast(ptr, victim);
                cast.mHitPosition = hitPosition;
                cast.cast(weapon);
            }
        }

        MWMechanics::applyElementalShields(ptr, victim);

        if (!weapon.isEmpty() && MWMechanics::blockMeleeAttack(ptr, victim, weapon, damage))
            damage = 0;

        if (healthdmg && damage > 0)
            MWBase::Environment::get().getWorld()->spawnBloodEffect(victim, hitPosition);

        MWMechanics::diseaseContact(victim, ptr);

        othercls.onHit(victim, damage, healthdmg, weapon, ptr, true);
    }

    void Npc::onHit(const MWWorld::Ptr &ptr, float damage, bool ishealth, const MWWorld::Ptr &object, const MWWorld::Ptr &attacker, bool successful) const
    {
        MWBase::SoundManager *sndMgr = MWBase::Environment::get().getSoundManager();

        // NOTE: 'object' and/or 'attacker' may be empty.

        bool wasDead = getCreatureStats(ptr).isDead();

        getCreatureStats(ptr).setAttacked(true);

        if (!attacker.isEmpty())
            MWBase::Environment::get().getMechanicsManager()->actorAttacked(ptr, attacker);

        if(!successful)
        {
            // TODO: Handle HitAttemptOnMe script function

            // Missed
            sndMgr->playSound3D(ptr, "miss", 1.0f, 1.0f);
            return;
        }

        if(!object.isEmpty())
            getCreatureStats(ptr).setLastHitObject(object.getClass().getId(object));

        if(!attacker.isEmpty() && attacker.getRefData().getHandle() == "player")
        {
            const std::string &script = ptr.getClass().getScript(ptr);
            /* Set the OnPCHitMe script variable. The script is responsible for clearing it. */
            if(!script.empty())
                ptr.getRefData().getLocals().setVarByInt(script, "onpchitme", 1);
        }

        if (damage > 0.0f && !object.isEmpty())
            MWMechanics::resistNormalWeapon(ptr, attacker, object, damage);

        if (damage < 0.001f)
            damage = 0;

        if(damage > 0.0f && !attacker.isEmpty())
        {
            // 'ptr' is losing health. Play a 'hit' voiced dialog entry if not already saying
            // something, alert the character controller, scripts, etc.

            const MWWorld::ESMStore &store = MWBase::Environment::get().getWorld()->getStore();
            const GMST& gmst = getGmst();

            int chance = store.get<ESM::GameSetting>().find("iVoiceHitOdds")->getInt();
            int roll = std::rand()/ (static_cast<double> (RAND_MAX) + 1) * 100; // [0, 99]
            if (roll < chance)
            {
                MWBase::Environment::get().getDialogueManager()->say(ptr, "hit");
            }

            // Check for knockdown
            float agilityTerm = getCreatureStats(ptr).getAttribute(ESM::Attribute::Agility).getModified() * gmst.fKnockDownMult->getFloat();
            float knockdownTerm = getCreatureStats(ptr).getAttribute(ESM::Attribute::Agility).getModified()
                    * gmst.iKnockDownOddsMult->getInt() * 0.01 + gmst.iKnockDownOddsBase->getInt();
            roll = std::rand()/ (static_cast<double> (RAND_MAX) + 1) * 100; // [0, 99]
            if (ishealth && agilityTerm <= damage && knockdownTerm <= roll)
            {
                getCreatureStats(ptr).setKnockedDown(true);

            }
            else
                getCreatureStats(ptr).setHitRecovery(true); // Is this supposed to always occur?

            if(damage > 0 && ishealth)
            {
                // Hit percentages:
                // cuirass = 30%
                // shield, helmet, greaves, boots, pauldrons = 10% each
                // guantlets = 5% each
                static const int hitslots[20] = {
                    MWWorld::InventoryStore::Slot_Cuirass, MWWorld::InventoryStore::Slot_Cuirass,
                    MWWorld::InventoryStore::Slot_Cuirass, MWWorld::InventoryStore::Slot_Cuirass,
                    MWWorld::InventoryStore::Slot_Cuirass, MWWorld::InventoryStore::Slot_Cuirass,
                    MWWorld::InventoryStore::Slot_CarriedLeft, MWWorld::InventoryStore::Slot_CarriedLeft,
                    MWWorld::InventoryStore::Slot_Helmet, MWWorld::InventoryStore::Slot_Helmet,
                    MWWorld::InventoryStore::Slot_Greaves, MWWorld::InventoryStore::Slot_Greaves,
                    MWWorld::InventoryStore::Slot_Boots, MWWorld::InventoryStore::Slot_Boots,
                    MWWorld::InventoryStore::Slot_LeftPauldron, MWWorld::InventoryStore::Slot_LeftPauldron,
                    MWWorld::InventoryStore::Slot_RightPauldron, MWWorld::InventoryStore::Slot_RightPauldron,
                    MWWorld::InventoryStore::Slot_LeftGauntlet, MWWorld::InventoryStore::Slot_RightGauntlet
                };
                int hitslot = hitslots[(int)(::rand()/(RAND_MAX+1.0)*20.0)];

                float unmitigatedDamage = damage;
                float x = damage / (damage + getArmorRating(ptr));
                damage *= std::max(gmst.fCombatArmorMinMult->getFloat(), x);
                int damageDiff = unmitigatedDamage - damage;
                if (damage < 1)
                    damage = 1;

                MWWorld::InventoryStore &inv = getInventoryStore(ptr);
                MWWorld::ContainerStoreIterator armorslot = inv.getSlot(hitslot);
                MWWorld::Ptr armor = ((armorslot != inv.end()) ? *armorslot : MWWorld::Ptr());
                if(!armor.isEmpty() && armor.getTypeName() == typeid(ESM::Armor).name())
                {
                    int armorhealth = armor.getClass().getItemHealth(armor);
                    armorhealth -= std::min(std::max(1, damageDiff),
                                                 armorhealth);
                    armor.getCellRef().setCharge(armorhealth);

                    // Armor broken? unequip it
                    if (armorhealth == 0)
                        armor = *inv.unequipItem(armor, ptr);

                    if (ptr.getRefData().getHandle() == "player")
                        skillUsageSucceeded(ptr, armor.getClass().getEquipmentSkill(armor), 0);

                    switch(armor.getClass().getEquipmentSkill(armor))
                    {
                        case ESM::Skill::LightArmor:
                            sndMgr->playSound3D(ptr, "Light Armor Hit", 1.0f, 1.0f);
                            break;
                        case ESM::Skill::MediumArmor:
                            sndMgr->playSound3D(ptr, "Medium Armor Hit", 1.0f, 1.0f);
                            break;
                        case ESM::Skill::HeavyArmor:
                            sndMgr->playSound3D(ptr, "Heavy Armor Hit", 1.0f, 1.0f);
                            break;
                    }
                }
                else if(ptr.getRefData().getHandle() == "player")
                    skillUsageSucceeded(ptr, ESM::Skill::Unarmored, 0);
            }
        }

        if(ishealth)
        {
            if (!attacker.isEmpty())
                damage = scaleDamage(damage, attacker, ptr);

            if(damage > 0.0f)
                sndMgr->playSound3D(ptr, "Health Damage", 1.0f, 1.0f);
            float health = getCreatureStats(ptr).getHealth().getCurrent() - damage;
            setActorHealth(ptr, health, attacker);
        }
        else
        {
            MWMechanics::DynamicStat<float> fatigue(getCreatureStats(ptr).getFatigue());
            fatigue.setCurrent(fatigue.getCurrent() - damage, true);
            getCreatureStats(ptr).setFatigue(fatigue);
        }

        if (!wasDead && getCreatureStats(ptr).isDead())
        {
            // NPC was killed
            if (!attacker.isEmpty() && attacker.getClass().isNpc() && attacker.getClass().getNpcStats(attacker).isWerewolf())
            {
                attacker.getClass().getNpcStats(attacker).addWerewolfKill();
            }

            // Simple check for who attacked first: if the player attacked first, a crimeId should be set
            // Doesn't handle possible edge case where no one reported the assault, but in such a case,
            // for bystanders it is not possible to tell who attacked first, anyway.
            MWWorld::Ptr player = MWBase::Environment::get().getWorld()->getPlayerPtr();
            if (attacker == player && ptr.getClass().getNpcStats(ptr).getCrimeId() != -1 && ptr != player)
                MWBase::Environment::get().getMechanicsManager()->commitCrime(player, ptr, MWBase::MechanicsManager::OT_Murder);
        }
    }

    void Npc::block(const MWWorld::Ptr &ptr) const
    {
        MWWorld::InventoryStore& inv = getInventoryStore(ptr);
        MWWorld::ContainerStoreIterator shield = inv.getSlot(MWWorld::InventoryStore::Slot_CarriedLeft);
        if (shield == inv.end())
            return;

        MWBase::SoundManager *sndMgr = MWBase::Environment::get().getSoundManager();
        switch(shield->getClass().getEquipmentSkill(*shield))
        {
            case ESM::Skill::LightArmor:
                sndMgr->playSound3D(ptr, "Light Armor Hit", 1.0f, 1.0f);
                break;
            case ESM::Skill::MediumArmor:
                sndMgr->playSound3D(ptr, "Medium Armor Hit", 1.0f, 1.0f);
                break;
            case ESM::Skill::HeavyArmor:
                sndMgr->playSound3D(ptr, "Heavy Armor Hit", 1.0f, 1.0f);
                break;
            default:
                return;
        }
    }

    void Npc::setActorHealth(const MWWorld::Ptr& ptr, float health, const MWWorld::Ptr& attacker) const
    {
        MWMechanics::CreatureStats &crstats = getCreatureStats(ptr);
        bool wasDead = crstats.isDead();

        MWMechanics::DynamicStat<float> stat(crstats.getHealth());
        stat.setCurrent(health);
        crstats.setHealth(stat);

        if(!wasDead && crstats.isDead())
        {
            // actor was just killed
        }
        else if(wasDead && !crstats.isDead())
        {
            // actor was just resurrected
        }
    }


    boost::shared_ptr<MWWorld::Action> Npc::activate (const MWWorld::Ptr& ptr,
        const MWWorld::Ptr& actor) const
    {
        // player got activated by another NPC
        if(ptr.getRefData().getHandle() == "player")
            return boost::shared_ptr<MWWorld::Action>(new MWWorld::ActionTalk(actor));

        // Werewolfs can't activate NPCs
        if(actor.getClass().isNpc() && actor.getClass().getNpcStats(actor).isWerewolf())
        {
            const MWWorld::ESMStore &store = MWBase::Environment::get().getWorld()->getStore();
            const ESM::Sound *sound = store.get<ESM::Sound>().searchRandom("WolfNPC");

            boost::shared_ptr<MWWorld::Action> action(new MWWorld::FailedAction("#{sWerewolfRefusal}"));
            if(sound) action->setSound(sound->mId);

            return action;
        }

        if(getCreatureStats(ptr).isDead())
            return boost::shared_ptr<MWWorld::Action>(new MWWorld::ActionOpen(ptr, true));
        if(ptr.getClass().getCreatureStats(ptr).getAiSequence().isInCombat())
            return boost::shared_ptr<MWWorld::Action>(new MWWorld::FailedAction("#{sActorInCombat}"));
        if(getCreatureStats(actor).getStance(MWMechanics::CreatureStats::Stance_Sneak)
                || ptr.getClass().getCreatureStats(ptr).getKnockedDown())
            return boost::shared_ptr<MWWorld::Action>(new MWWorld::ActionOpen(ptr)); // stealing
        // Can't talk to werewolfs
        if(ptr.getClass().isNpc() && ptr.getClass().getNpcStats(ptr).isWerewolf())
            return boost::shared_ptr<MWWorld::Action> (new MWWorld::FailedAction(""));
        return boost::shared_ptr<MWWorld::Action>(new MWWorld::ActionTalk(ptr));
    }

    MWWorld::ContainerStore& Npc::getContainerStore (const MWWorld::Ptr& ptr)
        const
    {
        ensureCustomData (ptr);

        return dynamic_cast<NpcCustomData&> (*ptr.getRefData().getCustomData()).mInventoryStore;
    }

    MWWorld::InventoryStore& Npc::getInventoryStore (const MWWorld::Ptr& ptr)
        const
    {
        ensureCustomData (ptr);

        return dynamic_cast<NpcCustomData&> (*ptr.getRefData().getCustomData()).mInventoryStore;
    }

    std::string Npc::getScript (const MWWorld::Ptr& ptr) const
    {
        MWWorld::LiveCellRef<ESM::NPC> *ref =
            ptr.get<ESM::NPC>();

        return ref->mBase->mScript;
    }

    float Npc::getSpeed(const MWWorld::Ptr& ptr) const
    {
        const MWBase::World *world = MWBase::Environment::get().getWorld();
        const GMST& gmst = getGmst();

        const NpcCustomData *npcdata = static_cast<const NpcCustomData*>(ptr.getRefData().getCustomData());
        const MWMechanics::MagicEffects &mageffects = npcdata->mNpcStats.getMagicEffects();

        const float normalizedEncumbrance = Npc::getEncumbrance(ptr) / Npc::getCapacity(ptr);

        bool sneaking = ptr.getClass().getCreatureStats(ptr).getStance(MWMechanics::CreatureStats::Stance_Sneak);
        bool running = ptr.getClass().getCreatureStats(ptr).getStance(MWMechanics::CreatureStats::Stance_Run);

        float walkSpeed = gmst.fMinWalkSpeed->getFloat() + 0.01f*npcdata->mNpcStats.getAttribute(ESM::Attribute::Speed).getModified()*
                                                      (gmst.fMaxWalkSpeed->getFloat() - gmst.fMinWalkSpeed->getFloat());
        walkSpeed *= 1.0f - gmst.fEncumberedMoveEffect->getFloat()*normalizedEncumbrance;
        walkSpeed = std::max(0.0f, walkSpeed);
        if(sneaking)
            walkSpeed *= gmst.fSneakSpeedMultiplier->getFloat();

        float runSpeed = walkSpeed*(0.01f * npcdata->mNpcStats.getSkill(ESM::Skill::Athletics).getModified() *
                                    gmst.fAthleticsRunBonus->getFloat() + gmst.fBaseRunMultiplier->getFloat());

        float moveSpeed;
        if(normalizedEncumbrance >= 1.0f)
            moveSpeed = 0.0f;
        else if(mageffects.get(ESM::MagicEffect::Levitate).getMagnitude() > 0 &&
                world->isLevitationEnabled())
        {
            float flySpeed = 0.01f*(npcdata->mNpcStats.getAttribute(ESM::Attribute::Speed).getModified() +
                                    mageffects.get(ESM::MagicEffect::Levitate).getMagnitude());
            flySpeed = gmst.fMinFlySpeed->getFloat() + flySpeed*(gmst.fMaxFlySpeed->getFloat() - gmst.fMinFlySpeed->getFloat());
            flySpeed *= 1.0f - gmst.fEncumberedMoveEffect->getFloat() * normalizedEncumbrance;
            flySpeed = std::max(0.0f, flySpeed);
            moveSpeed = flySpeed;
        }
        else if(world->isSwimming(ptr))
        {
            float swimSpeed = walkSpeed;
            if(running)
                swimSpeed = runSpeed;
            swimSpeed *= 1.0f + 0.01f * mageffects.get(ESM::MagicEffect::SwiftSwim).getMagnitude();
            swimSpeed *= gmst.fSwimRunBase->getFloat() + 0.01f*npcdata->mNpcStats.getSkill(ESM::Skill::Athletics).getModified()*
                                                    gmst.fSwimRunAthleticsMult->getFloat();
            moveSpeed = swimSpeed;
        }
        else if(running && !sneaking)
            moveSpeed = runSpeed;
        else
            moveSpeed = walkSpeed;
        if(getMovementSettings(ptr).mPosition[0] != 0 && getMovementSettings(ptr).mPosition[1] == 0)
            moveSpeed *= 0.75f;

        if(npcdata->mNpcStats.isWerewolf() && running && npcdata->mNpcStats.getDrawState() == MWMechanics::DrawState_Nothing)
            moveSpeed *= gmst.fWereWolfRunMult->getFloat();

        return moveSpeed;
    }

    float Npc::getJump(const MWWorld::Ptr &ptr) const
    {
        const NpcCustomData *npcdata = static_cast<const NpcCustomData*>(ptr.getRefData().getCustomData());
        const GMST& gmst = getGmst();
        const MWMechanics::MagicEffects &mageffects = npcdata->mNpcStats.getMagicEffects();
        const float encumbranceTerm = gmst.fJumpEncumbranceBase->getFloat() +
                                          gmst.fJumpEncumbranceMultiplier->getFloat() *
                                          (1.0f - Npc::getEncumbrance(ptr)/Npc::getCapacity(ptr));

        float a = npcdata->mNpcStats.getSkill(ESM::Skill::Acrobatics).getModified();
        float b = 0.0f;
        if(a > 50.0f)
        {
            b = a - 50.0f;
            a = 50.0f;
        }

        float x = gmst.fJumpAcrobaticsBase->getFloat() +
                  std::pow(a / 15.0f, gmst.fJumpAcroMultiplier->getFloat());
        x += 3.0f * b * gmst.fJumpAcroMultiplier->getFloat();
        x += mageffects.get(ESM::MagicEffect::Jump).getMagnitude() * 64;
        x *= encumbranceTerm;

        if(ptr.getClass().getCreatureStats(ptr).getStance(MWMechanics::CreatureStats::Stance_Run))
            x *= gmst.fJumpRunMultiplier->getFloat();
        x *= npcdata->mNpcStats.getFatigueTerm();
        x -= -627.2f;/*gravity constant*/
        x /= 3.0f;

        return x;
    }

    float Npc::getFallDamage(const MWWorld::Ptr &ptr, float fallHeight) const
    {
        MWBase::World *world = MWBase::Environment::get().getWorld();
        const MWWorld::Store<ESM::GameSetting> &store = world->getStore().get<ESM::GameSetting>();

        const float fallDistanceMin = store.find("fFallDamageDistanceMin")->getFloat();

        if (fallHeight >= fallDistanceMin)
        {
            const float acrobaticsSkill = ptr.getClass().getNpcStats (ptr).getSkill(ESM::Skill::Acrobatics).getModified();
            const NpcCustomData *npcdata = static_cast<const NpcCustomData*>(ptr.getRefData().getCustomData());
            const float jumpSpellBonus = npcdata->mNpcStats.getMagicEffects().get(ESM::MagicEffect::Jump).getMagnitude();
            const float fallAcroBase = store.find("fFallAcroBase")->getFloat();
            const float fallAcroMult = store.find("fFallAcroMult")->getFloat();
            const float fallDistanceBase = store.find("fFallDistanceBase")->getFloat();
            const float fallDistanceMult = store.find("fFallDistanceMult")->getFloat();

            float x = fallHeight - fallDistanceMin;
            x -= (1.5 * acrobaticsSkill) + jumpSpellBonus;
            x = std::max(0.0f, x);

            float a = fallAcroBase + fallAcroMult * (100 - acrobaticsSkill);
            x = fallDistanceBase + fallDistanceMult * x;
            x *= a;

            return x;
        }

        return 0;
    }

    MWMechanics::Movement& Npc::getMovementSettings (const MWWorld::Ptr& ptr) const
    {
        ensureCustomData (ptr);

        return dynamic_cast<NpcCustomData&> (*ptr.getRefData().getCustomData()).mMovement;
    }

    Ogre::Vector3 Npc::getMovementVector (const MWWorld::Ptr& ptr) const
    {
        MWMechanics::Movement &movement = getMovementSettings(ptr);
        Ogre::Vector3 vec(movement.mPosition);
        movement.mPosition[0] = 0.0f;
        movement.mPosition[1] = 0.0f;
        movement.mPosition[2] = 0.0f;
        return vec;
    }

    Ogre::Vector3 Npc::getRotationVector (const MWWorld::Ptr& ptr) const
    {
        MWMechanics::Movement &movement = getMovementSettings(ptr);
        Ogre::Vector3 vec(movement.mRotation);
        movement.mRotation[0] = 0.0f;
        movement.mRotation[1] = 0.0f;
        movement.mRotation[2] = 0.0f;
        return vec;
    }

    bool Npc::isEssential (const MWWorld::Ptr& ptr) const
    {
        MWWorld::LiveCellRef<ESM::NPC> *ref =
            ptr.get<ESM::NPC>();

        return ref->mBase->mFlags & ESM::NPC::Essential;
    }

    void Npc::registerSelf()
    {
        boost::shared_ptr<Class> instance (new Npc);
        registerClass (typeid (ESM::NPC).name(), instance);
    }

    bool Npc::hasToolTip (const MWWorld::Ptr& ptr) const
    {
        return !ptr.getClass().getCreatureStats(ptr).getAiSequence().isInCombat() || getCreatureStats(ptr).isDead();
    }

    MWGui::ToolTipInfo Npc::getToolTipInfo (const MWWorld::Ptr& ptr) const
    {
        MWWorld::LiveCellRef<ESM::NPC> *ref = ptr.get<ESM::NPC>();

        bool fullHelp = MWBase::Environment::get().getWindowManager()->getFullHelp();
        MWGui::ToolTipInfo info;

        info.caption = getName(ptr);
        if(fullHelp && getNpcStats(ptr).isWerewolf())
        {
            info.caption += " (";
            info.caption += ref->mBase->mName;
            info.caption += ")";
        }

        if(fullHelp)
            info.text = MWGui::ToolTips::getMiscString(ref->mBase->mScript, "Script");

        return info;
    }

    float Npc::getCapacity (const MWWorld::Ptr& ptr) const
    {
        const MWMechanics::CreatureStats& stats = getCreatureStats (ptr);
        static const float fEncumbranceStrMult = MWBase::Environment::get().getWorld()->getStore().get<ESM::GameSetting>().find("fEncumbranceStrMult")->getFloat();
        return stats.getAttribute(0).getModified()*fEncumbranceStrMult;
    }

    float Npc::getEncumbrance (const MWWorld::Ptr& ptr) const
    {
        const MWMechanics::NpcStats &stats = getNpcStats(ptr);

        // According to UESP, inventory weight is ignored in werewolf form. Does that include
        // feather and burden effects?
        float weight = 0.0f;
        if(!stats.isWerewolf())
        {
            weight  = getContainerStore(ptr).getWeight();
            weight -= stats.getMagicEffects().get(ESM::MagicEffect::Feather).getMagnitude();
            weight += stats.getMagicEffects().get(ESM::MagicEffect::Burden).getMagnitude();
            if(weight < 0.0f)
                weight = 0.0f;
        }

        return weight;
    }

    bool Npc::apply (const MWWorld::Ptr& ptr, const std::string& id,
        const MWWorld::Ptr& actor) const
    {
        MWMechanics::CastSpell cast(ptr, ptr);
        return cast.cast(id);
    }

    void Npc::skillUsageSucceeded (const MWWorld::Ptr& ptr, int skill, int usageType) const
    {
        MWMechanics::NpcStats& stats = getNpcStats (ptr);

        MWWorld::LiveCellRef<ESM::NPC> *ref = ptr.get<ESM::NPC>();

        const ESM::Class *class_ =
            MWBase::Environment::get().getWorld()->getStore().get<ESM::Class>().find (
                ref->mBase->mClass
            );

        stats.useSkill (skill, *class_, usageType);
    }

    float Npc::getArmorRating (const MWWorld::Ptr& ptr) const
    {
        const MWBase::World *world = MWBase::Environment::get().getWorld();
        const MWWorld::Store<ESM::GameSetting> &store = world->getStore().get<ESM::GameSetting>();

        MWMechanics::NpcStats &stats = getNpcStats(ptr);
        MWWorld::InventoryStore &invStore = getInventoryStore(ptr);

        int iBaseArmorSkill = store.find("iBaseArmorSkill")->getInt();
        float fUnarmoredBase1 = store.find("fUnarmoredBase1")->getFloat();
        float fUnarmoredBase2 = store.find("fUnarmoredBase2")->getFloat();
        int unarmoredSkill = stats.getSkill(ESM::Skill::Unarmored).getModified();

        int ratings[MWWorld::InventoryStore::Slots];
        for(int i = 0;i < MWWorld::InventoryStore::Slots;i++)
        {
            MWWorld::ContainerStoreIterator it = invStore.getSlot(i);
            if (it == invStore.end() || it->getTypeName() != typeid(ESM::Armor).name())
            {
                // unarmored
                ratings[i] = (fUnarmoredBase1 * unarmoredSkill) * (fUnarmoredBase2 * unarmoredSkill);
            }
            else
            {
                MWWorld::LiveCellRef<ESM::Armor> *ref = it->get<ESM::Armor>();

                int armorSkillType = it->getClass().getEquipmentSkill(*it);
                int armorSkill = stats.getSkill(armorSkillType).getModified();

                if(ref->mBase->mData.mWeight == 0)
                    ratings[i] = ref->mBase->mData.mArmor;
                else
                    ratings[i] = ref->mBase->mData.mArmor * armorSkill / iBaseArmorSkill;
            }
        }

        float shield = stats.getMagicEffects().get(ESM::MagicEffect::Shield).getMagnitude();

        return ratings[MWWorld::InventoryStore::Slot_Cuirass] * 0.3f
                + (ratings[MWWorld::InventoryStore::Slot_CarriedLeft] + ratings[MWWorld::InventoryStore::Slot_Helmet]
                    + ratings[MWWorld::InventoryStore::Slot_Greaves] + ratings[MWWorld::InventoryStore::Slot_Boots]
                    + ratings[MWWorld::InventoryStore::Slot_LeftPauldron] + ratings[MWWorld::InventoryStore::Slot_RightPauldron]
                    ) * 0.1f
                + (ratings[MWWorld::InventoryStore::Slot_LeftGauntlet] + ratings[MWWorld::InventoryStore::Slot_RightGauntlet])
                    * 0.05f
                + shield;
    }


    void Npc::adjustRotation(const MWWorld::Ptr& ptr,float& x,float& y,float& z) const
    {
        y = 0;
        x = 0;
    }

    void Npc::adjustScale(const MWWorld::Ptr &ptr, float &scale) const
    {
        MWWorld::LiveCellRef<ESM::NPC> *ref =
            ptr.get<ESM::NPC>();

        const ESM::Race* race =
                MWBase::Environment::get().getWorld()->getStore().get<ESM::Race>().find(ref->mBase->mRace);

        if (ref->mBase->isMale())
            scale *= race->mData.mHeight.mMale;
        else
            scale *= race->mData.mHeight.mFemale;
    }

    int Npc::getServices(const MWWorld::Ptr &actor) const
    {
        MWWorld::LiveCellRef<ESM::NPC>* ref = actor.get<ESM::NPC>();
        if (ref->mBase->mHasAI)
            return ref->mBase->mAiData.mServices;
        else
            return 0;
    }


    std::string Npc::getSoundIdFromSndGen(const MWWorld::Ptr &ptr, const std::string &name) const
    {
        if(name == "left")
        {
            MWBase::World *world = MWBase::Environment::get().getWorld();
            Ogre::Vector3 pos(ptr.getRefData().getPosition().pos);
            if(world->isSwimming(ptr))
                return "Swim Left";
            if(world->isUnderwater(ptr.getCell(), pos))
                return "FootWaterLeft";
            if(world->isOnGround(ptr))
            {
                MWWorld::InventoryStore &inv = Npc::getInventoryStore(ptr);
                MWWorld::ContainerStoreIterator boots = inv.getSlot(MWWorld::InventoryStore::Slot_Boots);
                if(boots == inv.end() || boots->getTypeName() != typeid(ESM::Armor).name())
                    return "FootBareLeft";

                switch(boots->getClass().getEquipmentSkill(*boots))
                {
                    case ESM::Skill::LightArmor:
                        return "FootLightLeft";
                    case ESM::Skill::MediumArmor:
                        return "FootMedLeft";
                    case ESM::Skill::HeavyArmor:
                        return "FootHeavyLeft";
                }
            }
            return "";
        }
        if(name == "right")
        {
            MWBase::World *world = MWBase::Environment::get().getWorld();
            Ogre::Vector3 pos(ptr.getRefData().getPosition().pos);
            if(world->isSwimming(ptr))
                return "Swim Right";
            if(world->isUnderwater(ptr.getCell(), pos))
                return "FootWaterRight";
            if(world->isOnGround(ptr))
            {
                MWWorld::InventoryStore &inv = Npc::getInventoryStore(ptr);
                MWWorld::ContainerStoreIterator boots = inv.getSlot(MWWorld::InventoryStore::Slot_Boots);
                if(boots == inv.end() || boots->getTypeName() != typeid(ESM::Armor).name())
                    return "FootBareRight";

                switch(boots->getClass().getEquipmentSkill(*boots))
                {
                    case ESM::Skill::LightArmor:
                        return "FootLightRight";
                    case ESM::Skill::MediumArmor:
                        return "FootMedRight";
                    case ESM::Skill::HeavyArmor:
                        return "FootHeavyRight";
                }
            }
            return "";
        }
        if(name == "land")
        {
            MWBase::World *world = MWBase::Environment::get().getWorld();
            Ogre::Vector3 pos(ptr.getRefData().getPosition().pos);
            if(world->isUnderwater(ptr.getCell(), pos))
                return "DefaultLandWater";
            if(world->isOnGround(ptr))
                return "Body Fall Medium";
            return "";
        }
        if(name == "swimleft")
            return "Swim Left";
        if(name == "swimright")
            return "Swim Right";
        // TODO: I have no idea what these are supposed to do for NPCs since they use
        // voiced dialog for various conditions like health loss and combat taunts. Maybe
        // only for biped creatures?
        if(name == "moan")
            return "";
        if(name == "roar")
            return "";
        if(name == "scream")
            return "";

        throw std::runtime_error(std::string("Unexpected soundgen type: ")+name);
    }

    MWWorld::Ptr
    Npc::copyToCellImpl(const MWWorld::Ptr &ptr, MWWorld::CellStore &cell) const
    {
        MWWorld::LiveCellRef<ESM::NPC> *ref =
            ptr.get<ESM::NPC>();

        return MWWorld::Ptr(&cell.get<ESM::NPC>().insert(*ref), &cell);
    }

    int Npc::getSkill(const MWWorld::Ptr& ptr, int skill) const
    {
        return ptr.getClass().getNpcStats(ptr).getSkill(skill).getModified();
    }

    int Npc::getBloodTexture(const MWWorld::Ptr &ptr) const
    {
        MWWorld::LiveCellRef<ESM::NPC> *ref = ptr.get<ESM::NPC>();

        if (ref->mBase->mFlags & ESM::NPC::Skeleton)
            return 1;
        if (ref->mBase->mFlags & ESM::NPC::Metal)
            return 2;
        return 0;
    }

    void Npc::readAdditionalState (const MWWorld::Ptr& ptr, const ESM::ObjectState& state)
        const
    {
        const ESM::NpcState& state2 = dynamic_cast<const ESM::NpcState&> (state);

        ensureCustomData(ptr);
        // If we do the following instead we get a sizable speedup, but this causes compatibility issues
        // with 0.30 savegames, where some state in CreatureStats was not saved yet,
        // and therefore needs to be loaded from ESM records. TODO: re-enable this in a future release.
        /*
        if (!ptr.getRefData().getCustomData())
        {
            // Create a CustomData, but don't fill it from ESM records (not needed)
            std::auto_ptr<NpcCustomData> data (new NpcCustomData);
            ptr.getRefData().setCustomData (data.release());
        }
        */

        NpcCustomData& customData = dynamic_cast<NpcCustomData&> (*ptr.getRefData().getCustomData());

        customData.mInventoryStore.readState (state2.mInventory);
        customData.mNpcStats.readState (state2.mNpcStats);
        static_cast<MWMechanics::CreatureStats&> (customData.mNpcStats).readState (state2.mCreatureStats);
    }

    void Npc::writeAdditionalState (const MWWorld::Ptr& ptr, ESM::ObjectState& state)
        const
    {
        ESM::NpcState& state2 = dynamic_cast<ESM::NpcState&> (state);

        ensureCustomData (ptr);

        NpcCustomData& customData = dynamic_cast<NpcCustomData&> (*ptr.getRefData().getCustomData());

        customData.mInventoryStore.writeState (state2.mInventory);
        customData.mNpcStats.writeState (state2.mNpcStats);
        static_cast<const MWMechanics::CreatureStats&> (customData.mNpcStats).writeState (state2.mCreatureStats);
    }

    int Npc::getBaseGold(const MWWorld::Ptr& ptr) const
    {
        MWWorld::LiveCellRef<ESM::NPC> *ref = ptr.get<ESM::NPC>();
        if(ref->mBase->mNpdtType != ESM::NPC::NPC_WITH_AUTOCALCULATED_STATS)
            return ref->mBase->mNpdt52.mGold;
        else
            return ref->mBase->mNpdt12.mGold;
    }

    bool Npc::isClass(const MWWorld::Ptr& ptr, const std::string &className) const
    {
        return Misc::StringUtils::ciEqual(ptr.get<ESM::NPC>()->mBase->mClass, className);
    }

    void Npc::respawn(const MWWorld::Ptr &ptr) const
    {
        if (ptr.get<ESM::NPC>()->mBase->mFlags & ESM::NPC::Respawn)
        {
            // Note we do not respawn moved references in the cell they were moved to. Instead they are respawned in the original cell.
            // This also means we cannot respawn dynamically placed references with no content file connection.
            if (ptr.getCellRef().getRefNum().mContentFile != -1)
            {
                if (ptr.getRefData().getCount() == 0)
                    ptr.getRefData().setCount(1);

                // Reset to original position
                ptr.getRefData().setPosition(ptr.getCellRef().getPosition());

                ptr.getRefData().setCustomData(NULL);
            }
        }
    }

    void Npc::restock(const MWWorld::Ptr& ptr) const
    {
        MWWorld::LiveCellRef<ESM::NPC> *ref = ptr.get<ESM::NPC>();
        const ESM::InventoryList& list = ref->mBase->mInventory;
        MWWorld::ContainerStore& store = getContainerStore(ptr);
        store.restock(list, ptr, ptr.getCellRef().getRefId(), ptr.getCellRef().getFaction());
    }
}