#include <boost/algorithm/clamp.hpp>
#include <components/openmw-mp/Log.hpp>
#include <apps/openmw/mwmechanics/steering.hpp>

#include "../mwbase/environment.hpp"
#include "../mwbase/soundmanager.hpp"

#include "../mwclass/npc.hpp"

#include "../mwdialogue/dialoguemanagerimp.hpp"

#include "../mwgui/windowmanagerimp.hpp"

#include "../mwinput/inputmanagerimp.hpp"

#include "../mwmechanics/actor.hpp"
#include "../mwmechanics/aitravel.hpp"
#include "../mwmechanics/creaturestats.hpp"
#include "../mwmechanics/npcstats.hpp"
#include "../mwmechanics/mechanicsmanagerimp.hpp"
#include "../mwmechanics/spellcasting.hpp"

#include "../mwstate/statemanagerimp.hpp"

#include "../mwworld/action.hpp"
#include "../mwworld/cellstore.hpp"
#include "../mwworld/customdata.hpp"
#include "../mwworld/inventorystore.hpp"
#include "../mwworld/player.hpp"
#include "../mwworld/worldimp.hpp"

#include "DedicatedPlayer.hpp"
#include "Main.hpp"
#include "GUIController.hpp"
#include "CellController.hpp"
#include "MechanicsHelper.hpp"
#include "RecordHelper.hpp"


using namespace mwmp;
using namespace std;

DedicatedPlayer::DedicatedPlayer(RakNet::RakNetGUID guid) : BasePlayer(guid)
{
    reference = 0;
    attack.pressed = 0;

    creatureStats.mDead = false;
    // Give this new character a temporary high fatigue so it doesn't spawn on
    // the ground
    creatureStats.mDynamic[2].mBase = 1000;

    movementFlags = 0;
    attack.instant = false;

    cell.blank();
    position.pos[0] = position.pos[1] = Main::get().getCellController()->getCellSize() / 2;
    position.pos[2] = 0;

    MWBase::World *world = MWBase::Environment::get().getWorld();
    npc = *world->getPlayerPtr().get<ESM::NPC>()->mBase;
    npc.mId = "";
    previousRace = npc.mRace;

    hasFinishedInitialTeleportation = false;
}
DedicatedPlayer::~DedicatedPlayer()
{

}

void DedicatedPlayer::update(float dt)
{
    // Only move and set anim flags if the framerate isn't too low
    if (dt < 0.1)
    {
        move(dt);
        setAnimFlags();
    }

    MWMechanics::CreatureStats *ptrCreatureStats = &ptr.getClass().getCreatureStats(ptr);

    MWMechanics::DynamicStat<float> value;

    if (creatureStats.mDead)
    {
        value.readState(creatureStats.mDynamic[0]);
        ptrCreatureStats->setHealth(value);
        return;
    }

    for (int i = 0; i < 3; ++i)
    {
        value.readState(creatureStats.mDynamic[i]);
        ptrCreatureStats->setDynamic(i, value);
    }

    if (ptrCreatureStats->isDead())
        ptrCreatureStats->resurrect();

    ptrCreatureStats->setAttacked(false);

    ptrCreatureStats->getAiSequence().stopCombat();

    ptrCreatureStats->setAlarmed(false);
    ptrCreatureStats->setAiSetting(MWMechanics::CreatureStats::AI_Alarm, 0);
    ptrCreatureStats->setAiSetting(MWMechanics::CreatureStats::AI_Fight, 0);
    ptrCreatureStats->setAiSetting(MWMechanics::CreatureStats::AI_Flee, 0);
    ptrCreatureStats->setAiSetting(MWMechanics::CreatureStats::AI_Hello, 0);
}

void DedicatedPlayer::move(float dt)
{
    if (!reference) return;

    ESM::Position refPos = ptr.getRefData().getPosition();
    MWBase::World *world = MWBase::Environment::get().getWorld();
    const int maxInterpolationDistance = 40;

    // Apply interpolation only if the position hasn't changed too much from last time
    bool shouldInterpolate =
            abs(position.pos[0] - refPos.pos[0]) < maxInterpolationDistance &&
            abs(position.pos[1] - refPos.pos[1]) < maxInterpolationDistance &&
            abs(position.pos[2] - refPos.pos[2]) < maxInterpolationDistance;

    if (shouldInterpolate)
    {
        static const int timeMultiplier = 15;
        osg::Vec3f lerp = MechanicsHelper::getLinearInterpolation(refPos.asVec3(), position.asVec3(), dt * timeMultiplier);

        world->moveObject(ptr, lerp.x(), lerp.y(), lerp.z());
    }
    else
        world->moveObject(ptr, position.pos[0], position.pos[1], position.pos[2]);

    world->rotateObject(ptr, position.rot[0], 0, position.rot[2]);

    MWMechanics::Movement *move = &ptr.getClass().getMovementSettings(ptr);
    move->mPosition[0] = direction.pos[0];
    move->mPosition[1] = direction.pos[1];
    move->mPosition[2] = direction.pos[2];

    // Make sure the values are valid, or we'll get an infinite error loop
    if (!isnan(direction.rot[0]) && !isnan(direction.rot[1]) && !isnan(direction.rot[2]))
    {
        move->mRotation[0] = direction.rot[0];
        move->mRotation[1] = direction.rot[1];
        move->mRotation[2] = direction.rot[2];
    }
}

void DedicatedPlayer::setBaseInfo()
{
    // Use the previous race if the new one doesn't exist
    if (!RecordHelper::doesRaceRecordExist(npc.mRace))
        npc.mRace = previousRace;

    if (!reference)
    {
        npc.mId = RecordHelper::createNpcRecord(npc);
        createReference(npc.mId);
    }
    else
    {
        RecordHelper::overrideNpcRecord(npc);
        reloadPtr();
    }

    // Only set equipment if the player isn't disguised as a creature
    if (ptr.getTypeName() == typeid(ESM::NPC).name())
        setEquipment();

    previousRace = npc.mRace;
}

void DedicatedPlayer::setShapeshift()
{
    MWBase::World *world = MWBase::Environment::get().getWorld();

    bool isNpc = false;

    if (reference)
        isNpc = ptr.getTypeName() == typeid(ESM::NPC).name();

    if (creatureRefId != previousCreatureRefId || displayCreatureName != previousDisplayCreatureName)
    {
        if (!creatureRefId.empty() && RecordHelper::doesCreatureRecordExist(creatureRefId))
        {
            deleteReference();

            const ESM::Creature *tmpCreature = world->getStore().get<ESM::Creature>().search(creatureRefId);
            creature = *tmpCreature;
            creature.mScript = "";
            if (!displayCreatureName)
                creature.mName = npc.mName;
            LOG_APPEND(Log::LOG_INFO, "- %s is disguised as %s", npc.mName.c_str(), creatureRefId.c_str());

            // Is this our first time creating a creature record id for this player? If so, keep it around
            // and reuse it
            if (creatureRecordId.empty())
            {
                creature.mId = creatureRecordId = RecordHelper::createCreatureRecord(creature);
                LOG_APPEND(Log::LOG_INFO, "- Creating new creature record %s", creatureRecordId.c_str());
            }
            else
            {
                creature.mId = creatureRecordId;
                RecordHelper::overrideCreatureRecord(creature);
            }

            LOG_APPEND(Log::LOG_INFO, "- Creating reference for %s", creature.mId.c_str());
            createReference(creature.mId);
        }
        // This player was already a creature, but the new creature refId was empty or
        // invalid, so we'll turn this player into their NPC self again as a result
        else if (!isNpc)
        {
            if (reference)
            {
                deleteReference();
            }

            RecordHelper::overrideNpcRecord(npc);
            createReference(npc.mId);
            reloadPtr();
        }

        previousCreatureRefId = creatureRefId;
        previousDisplayCreatureName = displayCreatureName;
    }

    if (ptr.getTypeName() == typeid(ESM::NPC).name())
    {
        MWBase::Environment::get().getMechanicsManager()->setWerewolf(ptr, isWerewolf);

        if (!isWerewolf)
            setEquipment();
    }

    MWBase::Environment::get().getWorld()->scaleObject(ptr, scale);
}

void DedicatedPlayer::setAnimFlags()
{
    using namespace MWMechanics;

    MWBase::World *world = MWBase::Environment::get().getWorld();

    // Until we figure out a better workaround for disabling player gravity,
    // simply cast Levitate over and over on a player that's supposed to be flying
    if (!isFlying)
        ptr.getClass().getCreatureStats(ptr).getActiveSpells().purgeEffect(ESM::MagicEffect::Levitate);
    else if (isFlying && !world->isFlying(ptr))
    {
        MWMechanics::CastSpell cast(ptr, ptr);
        cast.mHitPosition = ptr.getRefData().getPosition().asVec3();
        cast.mAlwaysSucceed = true;
        cast.cast("Levitate");
    }

    if (drawState == 0)
        ptr.getClass().getCreatureStats(ptr).setDrawState(DrawState_Nothing);
    else if (drawState == 1)
        ptr.getClass().getCreatureStats(ptr).setDrawState(DrawState_Weapon);
    else if (drawState == 2)
        ptr.getClass().getCreatureStats(ptr).setDrawState(DrawState_Spell);

    MWMechanics::CreatureStats *ptrCreatureStats = &ptr.getClass().getCreatureStats(ptr);
    ptrCreatureStats->setMovementFlag(CreatureStats::Flag_Run, (movementFlags & CreatureStats::Flag_Run) != 0);
    ptrCreatureStats->setMovementFlag(CreatureStats::Flag_Sneak, (movementFlags & CreatureStats::Flag_Sneak) != 0);
    ptrCreatureStats->setMovementFlag(CreatureStats::Flag_ForceJump, (movementFlags & CreatureStats::Flag_ForceJump) != 0);
    ptrCreatureStats->setMovementFlag(CreatureStats::Flag_ForceMoveJump, (movementFlags & CreatureStats::Flag_ForceMoveJump) != 0);
}

void DedicatedPlayer::setAttributes()
{
    MWMechanics::CreatureStats *ptrCreatureStats = &ptr.getClass().getCreatureStats(ptr);
    MWMechanics::AttributeValue attributeValue;

    for (int i = 0; i < 8; ++i)
    {
        attributeValue.readState(creatureStats.mAttributes[i]);
        ptrCreatureStats->setAttribute(i, attributeValue);
    }
}

void DedicatedPlayer::setSkills()
{
    // Go no further if the player is disguised as a creature
    if (ptr.getTypeName() != typeid(ESM::NPC).name()) return;

    MWMechanics::NpcStats *ptrNpcStats = &ptr.getClass().getNpcStats(ptr);
    MWMechanics::SkillValue skillValue;

    for (int i = 0; i < 27; ++i)
    {
        skillValue.readState(npcStats.mSkills[i]);
        ptrNpcStats->setSkill(i, skillValue);
    }
}

void DedicatedPlayer::setEquipment()
{
    // Go no further if the player is disguised as a creature
    if (!ptr.getClass().hasInventoryStore(ptr)) return;

    MWWorld::InventoryStore& invStore = ptr.getClass().getInventoryStore(ptr);
    for (int slot = 0; slot < MWWorld::InventoryStore::Slots; ++slot)
    {
        MWWorld::ContainerStoreIterator it = invStore.getSlot(slot);

        const string &packetItemId = equipmentItems[slot].refId;
        std::string ptrItemId = "";
        bool equal = false;

        if (it != invStore.end())
        {
            ptrItemId = it->getCellRef().getRefId();

            if (!Misc::StringUtils::ciEqual(ptrItemId, packetItemId)) // if other item is now equipped
            {
                MWWorld::ContainerStore &store = ptr.getClass().getContainerStore(ptr);

                // Remove the items that are no longer equipped, except for throwing weapons and ranged weapon ammo that
                // have just run out but still need to be kept briefly so they can be used in attacks about to be released
                bool shouldRemove = true;

                if (attack.type == mwmp::Attack::RANGED && packetItemId.empty() && !attack.pressed)
                {
                    if (slot == MWWorld::InventoryStore::Slot_CarriedRight && Misc::StringUtils::ciEqual(ptrItemId, attack.rangedWeaponId))
                        shouldRemove = false;
                    else if (slot == MWWorld::InventoryStore::Slot_Ammunition && Misc::StringUtils::ciEqual(ptrItemId, attack.rangedAmmoId))
                        shouldRemove = false;
                }
                
                if (shouldRemove)
                    store.remove(ptrItemId, store.count(ptrItemId), ptr);
            }
            else
                equal = true;
        }

        if (packetItemId.empty() || equal)
            continue;

        const int count = equipmentItems[slot].count;
        ptr.getClass().getContainerStore(ptr).add(packetItemId, count, ptr);

        for (const auto &itemPtr : invStore)
        {
            if (::Misc::StringUtils::ciEqual(itemPtr.getCellRef().getRefId(), packetItemId)) // equip item
            {
                std::shared_ptr<MWWorld::Action> action = itemPtr.getClass().use(itemPtr);
                action->execute(ptr);
                break;
            }
        }
    }
}

void DedicatedPlayer::setCell()
{
    // Prevent cell update when reference doesn't exist
    if (!reference) return;

    MWBase::World *world = MWBase::Environment::get().getWorld();

    LOG_MESSAGE_SIMPLE(Log::LOG_INFO, "Server says DedicatedPlayer %s moved to %s",
        npc.mName.c_str(), cell.getDescription().c_str());

    MWWorld::CellStore *cellStore = Main::get().getCellController()->getCellStore(cell);

    if (!cellStore)
    {
        LOG_APPEND(Log::LOG_INFO, "%s", "- Cell doesn't exist on this client");
        world->disable(getPtr());
        return;
    }
    else
        world->enable(getPtr());

    // Allow this player's reference to move across a cell now that a manual cell
    // update has been called
    setPtr(world->moveObject(ptr, cellStore, position.pos[0], position.pos[1], position.pos[2]));

    // Remove the marker entirely if this player has moved to an interior that is inactive for us
    if (!cell.isExterior() && !Main::get().getCellController()->isActiveWorldCell(cell))
        removeMarker();
    // Otherwise, update their marker so the player shows up in the right cell on the world map
    else
        updateMarker();

    // If this player is now in a cell that we are the local authority over, we should send them all
    // NPC data in that cell
    if (Main::get().getCellController()->hasLocalAuthority(cell))
        Main::get().getCellController()->getCell(cell)->updateLocal(true);

    // If this player is a new player or is now in a region that we are the weather authority over,
    // or is a new player, we should send our latest weather data to the server
    if (world->getWeatherCreationState())
    {
        if (!hasFinishedInitialTeleportation || Misc::StringUtils::ciEqual(getPtr().getCell()->getCell()->mRegion,
            world->getPlayerPtr().getCell()->getCell()->mRegion))
        {
            world->sendWeather();
        }
    }

    hasFinishedInitialTeleportation = true;
}

void DedicatedPlayer::updateMarker()
{
    if (!markerEnabled)
        return;

    GUIController *gui = Main::get().getGUIController();

    if (gui->mPlayerMarkers.contains(marker))
    {
        gui->mPlayerMarkers.deleteMarker(marker);
        marker = gui->createMarker(guid);
        gui->mPlayerMarkers.addMarker(marker);
    }
    else
        gui->mPlayerMarkers.addMarker(marker, true);
}

void DedicatedPlayer::removeMarker()
{
    if (!markerEnabled)
        return;

    markerEnabled = false;
    GUIController *gui = Main::get().getGUIController();

    if (gui->mPlayerMarkers.contains(marker))
        Main::get().getGUIController()->mPlayerMarkers.deleteMarker(marker);
}

void DedicatedPlayer::setMarkerState(bool state)
{
    if (state)
    {
        markerEnabled = true;
        updateMarker();
    }
    else
        removeMarker();
}

void DedicatedPlayer::playAnimation()
{
    MWBase::Environment::get().getMechanicsManager()->playAnimationGroup(getPtr(),
        animation.groupname, animation.mode, animation.count, animation.persist);
}

void DedicatedPlayer::playSpeech()
{
    MWBase::Environment::get().getSoundManager()->say(getPtr(), sound);

    MWBase::WindowManager *winMgr = MWBase::Environment::get().getWindowManager();
    if (winMgr->getSubtitlesEnabled())
        winMgr->messageBox(MWBase::Environment::get().getDialogueManager()->getVoiceCaption(sound), MWGui::ShowInDialogueMode_Never);
}

void DedicatedPlayer::createReference(const std::string& recId)
{
    MWBase::World *world = MWBase::Environment::get().getWorld();

    reference = new MWWorld::ManualRef(world->getStore(), recId, 1);

    LOG_APPEND(Log::LOG_INFO, "- Creating new reference pointer for %s", npc.mName.c_str());

    ptr = world->placeObject(reference->getPtr(), Main::get().getCellController()->getCellStore(cell), position);

    ESM::CustomMarker mEditingMarker = Main::get().getGUIController()->createMarker(guid);
    marker = mEditingMarker;
    setMarkerState(true);
}

void DedicatedPlayer::deleteReference()
{
    MWBase::World *world = MWBase::Environment::get().getWorld();

    LOG_APPEND(Log::LOG_INFO, "- Deleting reference");
    world->deleteObject(ptr);
    delete reference;
    reference = nullptr;
}

MWWorld::Ptr DedicatedPlayer::getPtr()
{
    return ptr;
}

MWWorld::ManualRef *DedicatedPlayer::getRef()
{
    return reference;
}

void DedicatedPlayer::setPtr(const MWWorld::Ptr& newPtr)
{
    ptr = newPtr;
}

void DedicatedPlayer::reloadPtr()
{
    MWBase::World *world = MWBase::Environment::get().getWorld();
    world->disable(ptr);
    world->enable(ptr);
}