//
//  ParticlesScriptingInterface.cpp
//  hifi
//
//  Created by Brad Hefta-Gaub on 12/6/13
//  Copyright (c) 2013 HighFidelity, Inc. All rights reserved.
//

#include "ParticlesScriptingInterface.h"
#include "ParticleTree.h"

ParticlesScriptingInterface::ParticlesScriptingInterface() :
    _nextCreatorTokenID(0),
    _particleTree(NULL)
{
}


void ParticlesScriptingInterface::queueParticleMessage(PacketType packetType,
        ParticleID particleID, const ParticleProperties& properties) {
    getParticlePacketSender()->queueParticleEditMessage(packetType, particleID, properties);
}

ParticleID ParticlesScriptingInterface::addParticle(const ParticleProperties& properties) {

    // The application will keep track of creatorTokenID
    uint32_t creatorTokenID = Particle::getNextCreatorTokenID();

    ParticleID id(NEW_PARTICLE, creatorTokenID, false );

    // queue the packet
    queueParticleMessage(PacketTypeParticleAddOrEdit, id, properties);

    return id;
}

ParticleID ParticlesScriptingInterface::identifyParticle(ParticleID particleID) {
    uint32_t actualID = particleID.id;
    if (!particleID.isKnownID) {
        actualID = Particle::getIDfromCreatorTokenID(particleID.creatorTokenID);
        if (actualID == UNKNOWN_PARTICLE_ID) {
            return particleID; // bailing early
        }
        
        // found it!
        particleID.id = actualID;
        particleID.isKnownID = true;
    }
    return particleID;
}

ParticleProperties ParticlesScriptingInterface::getParticleProperties(ParticleID particleID) {
    ParticleProperties results;
    ParticleID identity = identifyParticle(particleID);
    if (!identity.isKnownID) {
        results.setIsUnknownID();
        return results;
    }
    if (_particleTree) {
        const Particle* particle = _particleTree->findParticleByID(identity.id);
        results.copyFromParticle(*particle);
    }
    
    return results;
}



ParticleID ParticlesScriptingInterface::editParticle(ParticleID particleID, const ParticleProperties& properties) {
    uint32_t actualID = particleID.id;
    if (!particleID.isKnownID) {
        actualID = Particle::getIDfromCreatorTokenID(particleID.creatorTokenID);
        if (actualID == UNKNOWN_PARTICLE_ID) {
            return particleID; // bailing early
        }
    }

    particleID.id = actualID;
    particleID.isKnownID = true;
    //qDebug() << "ParticlesScriptingInterface::editParticle()... FOUND IT!!! actualID=" << actualID;

    bool wantDebugging = false;
    if (wantDebugging) {
        uint16_t containsBits = properties.getChangedBits();
        qDebug() << "ParticlesScriptingInterface::editParticle()... containsBits=" << containsBits;
        if ((containsBits & PACKET_CONTAINS_POSITION) == PACKET_CONTAINS_POSITION) {
            qDebug() << "ParticlesScriptingInterface::editParticle()... properties.getPositon()=" 
                << properties.getPosition().x << ", "
                << properties.getPosition().y << ", "
                << properties.getPosition().z << "...";
        }
        if ((containsBits & PACKET_CONTAINS_VELOCITY) == PACKET_CONTAINS_VELOCITY) {
            qDebug() << "ParticlesScriptingInterface::editParticle()... properties.getVelocity()=" 
                << properties.getVelocity().x << ", "
                << properties.getVelocity().y << ", "
                << properties.getVelocity().z << "...";
        }
        if ((containsBits & PACKET_CONTAINS_INHAND) == PACKET_CONTAINS_INHAND) {
            qDebug() << "ParticlesScriptingInterface::editParticle()... properties.getInHand()=" << properties.getInHand();
        }
    }
    
    queueParticleMessage(PacketTypeParticleAddOrEdit, particleID, properties);
    return particleID;
}


// TODO: This deleteParticle() method uses the PacketType_PARTICLE_ADD_OR_EDIT message to send
// a changed particle with a shouldDie() property set to true. This works and is currently the only
// way to tell the particle server to delete a particle. But we should change this to use the PacketType_PARTICLE_ERASE
// message which takes a list of particle id's to delete.
void ParticlesScriptingInterface::deleteParticle(ParticleID particleID) {

    // setup properties to kill the particle
    ParticleProperties properties;
    properties.setShouldDie(true);

    uint32_t actualID = particleID.id;
    if (!particleID.isKnownID) {
        actualID = Particle::getIDfromCreatorTokenID(particleID.creatorTokenID);

        // hmmm... we kind of want to bail if someone attempts to edit an unknown
        if (actualID == UNKNOWN_PARTICLE_ID) {
            //qDebug() << "ParticlesScriptingInterface::deleteParticle(), bailing - unknown particle...";
            return; // bailing early
        }
    }

    particleID.id = actualID;
    particleID.isKnownID = true;

    //qDebug() << "ParticlesScriptingInterface::deleteParticle(), queueParticleMessage......";
    queueParticleMessage(PacketTypeParticleAddOrEdit, particleID, properties);
}

ParticleID ParticlesScriptingInterface::findClosestParticle(const glm::vec3& center, float radius) const {
    ParticleID result(UNKNOWN_PARTICLE_ID, UNKNOWN_TOKEN, false);
    if (_particleTree) {
        const Particle* closestParticle = _particleTree->findClosestParticle(center/(float)TREE_SCALE, 
                                                                                radius/(float)TREE_SCALE);

        if (closestParticle) {
            result.id = closestParticle->getID();
            result.isKnownID = true;
        }
    }
    return result;
}


QVector<ParticleID> ParticlesScriptingInterface::findParticles(const glm::vec3& center, float radius) const {
    QVector<ParticleID> result;
    if (_particleTree) {
        QVector<const Particle*> particles = _particleTree->findParticles(center/(float)TREE_SCALE, radius/(float)TREE_SCALE);

        foreach (const Particle* particle, particles) {
            ParticleID thisParticleID(particle->getID(), UNKNOWN_TOKEN, true);
            result << thisParticleID;
        }
    }
    return result;
}