//
//  PacketReceiver.cpp
//  interface/src
//
//  Created by Stephen Birarda on 1/23/2014.
//  Update by Ryan Huffman on 7/8/2015.
//  Copyright 2014 High Fidelity, Inc.
//
//  Distributed under the Apache License, Version 2.0.
//  See the accompanying file LICENSE or http://www.apache.org/licenses/LICENSE-2.0.html
//

#include <QtCore/QWeakPointer>

#include <AccountManager.h>
#include <PerfStat.h>

#include "Application.h"
#include "avatar/AvatarManager.h"
#include "AudioClient.h"
#include "Menu.h"
#include "InterfaceLogging.h"

#include "PacketReceiver.h"

PacketReceiver::PacketReceiver(QObject* parent) :
    QObject(parent),
    _packetListenerMap()
{

}

void PacketReceiver::registerPacketListener(PacketType::Value type, QObject* object, QString methodName) {
    packetListenerLock.lock();
    if (packetListenerMap.contains(type)) {
        qDebug() << "Warning: Registering a packet listener for packet type " << type
            << " that will remove a previously registered listener";
    }
    packetListenerMap[type] = QPair<QObject*, QString>(object, methodName);
    packetListenerLock.unlock();
}

void PacketReceiver::processDatagrams() {
    PerformanceWarning warn(Menu::getInstance()->isOptionChecked(MenuOption::PipelineWarnings),
                            "PacketReceiver::processDatagrams()");

    if (_isShuttingDown) {
        return; // bail early... we're shutting down.
    }

    HifiSockAddr senderSockAddr;

    static QByteArray incomingPacket;

    Application* application = Application::getInstance();
    auto nodeList = DependencyManager::get<NodeList>();

    while (DependencyManager::get<NodeList>()->getNodeSocket().hasPendingDatagrams()) {
        incomingPacket.resize(nodeList->getNodeSocket().pendingDatagramSize());
        nodeList->readDatagram(incomingPacket, senderSockAddr.getAddressPointer(), senderSockAddr.getPortPointer());

        _inPacketCount++;
        _inByteCount += incomingPacket.size();

        if (nodeList->packetVersionAndHashMatch(incomingPacket)) {

            PacketType::Value incomingType = packetTypeForPacket(incomingPacket);
            // only process this packet if we have a match on the packet version
            switch (incomingType) {
                case PacketType::AudioEnvironment:
                case PacketType::AudioStreamStats:
                case PacketType::MixedAudio:
                case PacketType::SilentAudioFrame: {
                    if (incomingType == PacketType::AudioStreamStats) {
                        QMetaObject::invokeMethod(DependencyManager::get<AudioClient>().data(), "parseAudioStreamStatsPacket",
                                                  Qt::QueuedConnection,
                                                  Q_ARG(QByteArray, incomingPacket));
                    } else if (incomingType == PacketType::AudioEnvironment) {
                        QMetaObject::invokeMethod(DependencyManager::get<AudioClient>().data(), "parseAudioEnvironmentData",
                                                  Qt::QueuedConnection,
                                                  Q_ARG(QByteArray, incomingPacket));
                    } else {
                        QMetaObject::invokeMethod(DependencyManager::get<AudioClient>().data(), "addReceivedAudioToStream",
                                                  Qt::QueuedConnection,
                                                  Q_ARG(QByteArray, incomingPacket));
                    }

                    // update having heard from the audio-mixer and record the bytes received
                    SharedNodePointer audioMixer = nodeList->sendingNodeForPacket(incomingPacket);

                    if (audioMixer) {
                        audioMixer->setLastHeardMicrostamp(usecTimestampNow());
                    }

                    break;
                }
                case PacketType::EntityData:
                case PacketType::EntityErase:
                case PacketType::OctreeStats:
                case PacketType::EnvironmentData: {
                    PerformanceWarning warn(Menu::getInstance()->isOptionChecked(MenuOption::PipelineWarnings),
                                            "Application::networkReceive()... _octreeProcessor.queueReceivedPacket()");
                    SharedNodePointer matchedNode = DependencyManager::get<NodeList>()->sendingNodeForPacket(incomingPacket);

                    if (matchedNode) {
                        // add this packet to our list of octree packets and process them on the octree data processing
                        application->_octreeProcessor.queueReceivedPacket(matchedNode, incomingPacket);
                    }
                    break;
                }
                case PacketType::BulkAvatarData:
                case PacketType::KillAvatar:
                case PacketType::AvatarIdentity:
                case PacketType::AvatarBillboard: {
                    // update having heard from the avatar-mixer and record the bytes received
                    SharedNodePointer avatarMixer = nodeList->sendingNodeForPacket(incomingPacket);

                    if (avatarMixer) {
                        avatarMixer->setLastHeardMicrostamp(usecTimestampNow());

                        QMetaObject::invokeMethod(DependencyManager::get<AvatarManager>().data(), "processAvatarMixerDatagram",
                                                  Q_ARG(const QByteArray&, incomingPacket),
                                                  Q_ARG(const QWeakPointer<Node>&, avatarMixer));
                    }
                    break;
                }
                case PacketType::NoisyMute:
                case PacketType::MuteEnvironment: {
                    bool mute = !DependencyManager::get<AudioClient>()->isMuted();

                    if (incomingType == PacketType::MuteEnvironment) {
                        glm::vec3 position;
                        float radius;

                        int headerSize = numBytesForPacketHeaderGivenPacketType(PacketType::MuteEnvironment);
                        memcpy(&position, incomingPacket.constData() + headerSize, sizeof(glm::vec3));
                        memcpy(&radius, incomingPacket.constData() + headerSize + sizeof(glm::vec3), sizeof(float));
                        float distance = glm::distance(DependencyManager::get<AvatarManager>()->getMyAvatar()->getPosition(),
                                                 position);

                        mute = mute && (distance < radius);
                    }

                    if (mute) {
                        DependencyManager::get<AudioClient>()->toggleMute();
                        if (incomingType == PacketType::MuteEnvironment) {
                            AudioScriptingInterface::getInstance().environmentMuted();
                        } else {
                            AudioScriptingInterface::getInstance().mutedByMixer();
                        }
                    }
                    break;
                }
                case PacketType::EntityEditNack:
                    if (!Menu::getInstance()->isOptionChecked(MenuOption::DisableNackPackets)) {
                        application->_entityEditSender.processNackPacket(incomingPacket);
                    }
                    break;
                default:
                    //nodeList->processNodeData(senderSockAddr, incomingPacket);
                    
                    packetListenerLock.lock();
                    auto& listener = packetListenerMap[incomingType];
                    packetListenerLock.unlock();

                    if (packetListenerMap.contains(incomingType)) {
                        auto& listener = packetListenerMap[incomingType];
                        NLPacket packet;
                        bool success = QMetaObject::invokeMethod(listener.first, listener.second,
                                Q_ARG(std::unique_ptr<NLPacket>, packet),
                                Q_ARG(HifiSockAddr, senderSockAddr));
                        if (!success) {
                            qDebug() << "Error sending packet " << incomingType << " to listener: " << listener.first.name() << "::" << listener.second;
                        }
                    } else {
                        QDebug() << "No listener found for packet type: " << incomingType;
                    }

                    break;
            }
        }
    }
}