//
//  Stats.cpp
//  interface/src/ui
//
//  Created by Lucas Crisman on 22/03/14.
//  Copyright 2013 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 <sstream>

#include <stdlib.h>

#include <glm/glm.hpp>
#include <glm/gtx/component_wise.hpp>
#include <glm/gtx/quaternion.hpp>
#include <glm/gtx/vector_angle.hpp>

#include <PerfStat.h>

#include "Stats.h"
#include "InterfaceConfig.h"
#include "Menu.h"
#include "Util.h"
#include "SequenceNumberStats.h"

using namespace std;

const int STATS_PELS_PER_LINE = 20;

const int STATS_GENERAL_MIN_WIDTH = 165; 
const int STATS_PING_MIN_WIDTH = 190;
const int STATS_GEO_MIN_WIDTH = 240;
const int STATS_VOXEL_MIN_WIDTH = 410;

Stats* Stats::getInstance() {
    static Stats stats;
    return &stats;
}

Stats::Stats():
        _expanded(false),
        _recentMaxPackets(0),
        _resetRecentMaxPacketsSoon(true),
        _generalStatsWidth(STATS_GENERAL_MIN_WIDTH),
        _pingStatsWidth(STATS_PING_MIN_WIDTH),
        _geoStatsWidth(STATS_GEO_MIN_WIDTH),
        _voxelStatsWidth(STATS_VOXEL_MIN_WIDTH),
        _lastHorizontalOffset(0)
{
    QGLWidget* glWidget = Application::getInstance()->getGLWidget();
    resetWidth(glWidget->width(), 0);
}

void Stats::toggleExpanded() {
    _expanded = !_expanded;
}

// called on mouse click release
// check for clicks over stats  in order to expand or contract them
void Stats::checkClick(int mouseX, int mouseY, int mouseDragStartedX, int mouseDragStartedY, int horizontalOffset) {
    QGLWidget* glWidget = Application::getInstance()->getGLWidget();

    if (0 != glm::compMax(glm::abs(glm::ivec2(mouseX - mouseDragStartedX, mouseY - mouseDragStartedY)))) {
        // not worried about dragging on stats
        return;
    }

    int statsHeight = 0, 
        statsWidth = 0, 
        statsX = 0, 
        statsY = 0, 
        lines = 0;

    statsX = horizontalOffset;

    // top-left stats click
    lines = _expanded ? 5 : 3;
    statsHeight = lines * STATS_PELS_PER_LINE + 10;
    if (mouseX > statsX && mouseX < statsX + _generalStatsWidth && mouseY > statsY && mouseY < statsY + statsHeight) {
        toggleExpanded();
        return;
    }
    statsX += _generalStatsWidth;

    // ping stats click
    if (Menu::getInstance()->isOptionChecked(MenuOption::TestPing)) {
        lines = _expanded ? 4 : 3;
        statsHeight = lines * STATS_PELS_PER_LINE + 10;
        if (mouseX > statsX && mouseX < statsX + _pingStatsWidth && mouseY > statsY && mouseY < statsY + statsHeight) {
            toggleExpanded();
            return;
        }
        statsX += _pingStatsWidth;
    }

    // geo stats panel click
    lines = _expanded ? 4 : 3;
    statsHeight = lines * STATS_PELS_PER_LINE + 10;
    if (mouseX > statsX && mouseX < statsX + _geoStatsWidth  && mouseY > statsY && mouseY < statsY + statsHeight) {
        toggleExpanded();
        return;
    }
    statsX += _geoStatsWidth;

    // top-right stats click
    lines = _expanded ? 11 : 3;
    statsHeight = lines * STATS_PELS_PER_LINE + 10;
    statsWidth = glWidget->width() - statsX;
    if (mouseX > statsX && mouseX < statsX + statsWidth  && mouseY > statsY && mouseY < statsY + statsHeight) {
        toggleExpanded();
        return;
    }
}

void Stats::resetWidth(int width, int horizontalOffset) {
    QGLWidget* glWidget = Application::getInstance()->getGLWidget();
    int extraSpace = glWidget->width() - horizontalOffset -2
                   - STATS_GENERAL_MIN_WIDTH
                   - (Menu::getInstance()->isOptionChecked(MenuOption::TestPing) ? STATS_PING_MIN_WIDTH -1 : 0)
                   - STATS_GEO_MIN_WIDTH
                   - STATS_VOXEL_MIN_WIDTH;

    int panels = 4;

    _generalStatsWidth = STATS_GENERAL_MIN_WIDTH;
    if (Menu::getInstance()->isOptionChecked(MenuOption::TestPing)) {
        _pingStatsWidth = STATS_PING_MIN_WIDTH;
    } else {
        _pingStatsWidth = 0;
        panels = 3;
    }
    _geoStatsWidth = STATS_GEO_MIN_WIDTH;
    _voxelStatsWidth = STATS_VOXEL_MIN_WIDTH;

    if (extraSpace > panels) {
        _generalStatsWidth += (int) extraSpace / panels;
        if (Menu::getInstance()->isOptionChecked(MenuOption::TestPing)) {
            _pingStatsWidth += (int) extraSpace / panels;
        }
        _geoStatsWidth += (int) extraSpace / panels;
        _voxelStatsWidth += glWidget->width() - (_generalStatsWidth + _pingStatsWidth + _geoStatsWidth + 3);
    }
}


// translucent background box that makes stats more readable
void Stats::drawBackground(unsigned int rgba, int x, int y, int width, int height) {
    glBegin(GL_QUADS);
    glColor4f(((rgba >> 24) & 0xff) / 255.0f,
              ((rgba >> 16) & 0xff) / 255.0f, 
              ((rgba >> 8) & 0xff)  / 255.0f,
              (rgba & 0xff) / 255.0f);
    glVertex3f(x, y, 0);
    glVertex3f(x + width, y, 0);
    glVertex3f(x + width, y + height, 0);
    glVertex3f(x , y + height, 0);
    glEnd();
    glColor4f(1, 1, 1, 1); 
}

bool Stats::includeTimingRecord(const QString& name) {
    if (Menu::getInstance()->isOptionChecked(MenuOption::DisplayTimingDetails)) {
        if (name.startsWith("/idle/update/")) {
            if (name.startsWith("/idle/update/myAvatar/")) {
                if (name.startsWith("/idle/update/myAvatar/simulate/")) {
                    return Menu::getInstance()->isOptionChecked(MenuOption::ExpandMyAvatarSimulateTiming);
                }
                return Menu::getInstance()->isOptionChecked(MenuOption::ExpandMyAvatarTiming);
            } else if (name.startsWith("/idle/update/otherAvatars/")) {
                return Menu::getInstance()->isOptionChecked(MenuOption::ExpandOtherAvatarTiming);
            }
            return Menu::getInstance()->isOptionChecked(MenuOption::ExpandUpdateTiming);
        } else if (name.startsWith("/idle/updateGL/paintGL/")) {
            return Menu::getInstance()->isOptionChecked(MenuOption::ExpandPaintGLTiming);
        } else if (name.startsWith("/paintGL/")) {
            return Menu::getInstance()->isOptionChecked(MenuOption::ExpandPaintGLTiming);
        }
        return true;
    }
    return false;
}

// display expanded or contracted stats
void Stats::display(
        const float* color, 
        int horizontalOffset, 
        float fps, 
        int packetsPerSecond, 
        int bytesPerSecond, 
        int voxelPacketsToProcess) 
{
    QGLWidget* glWidget = Application::getInstance()->getGLWidget();

    unsigned int backgroundColor = 0x33333399;
    int verticalOffset = 0, lines = 0;
    float scale = 0.10f;
    float rotation = 0.0f;
    int font = 2;

    QLocale locale(QLocale::English);
    std::stringstream voxelStats;

    if (_lastHorizontalOffset != horizontalOffset) {
        resetWidth(glWidget->width(), horizontalOffset);
        _lastHorizontalOffset = horizontalOffset;
    }

    glPointSize(1.0f);

    // we need to take one avatar out so we don't include ourselves
    int totalAvatars = Application::getInstance()->getAvatarManager().size() - 1;
    int totalServers = NodeList::getInstance()->size();

    lines = _expanded ? 5 : 3;
    drawBackground(backgroundColor, horizontalOffset, 0, _generalStatsWidth, lines * STATS_PELS_PER_LINE + 10);
    horizontalOffset += 5;

    char serverNodes[30];
    sprintf(serverNodes, "Servers: %d", totalServers);
    char avatarNodes[30];
    sprintf(avatarNodes, "Avatars: %d", totalAvatars);
    char framesPerSecond[30];
    sprintf(framesPerSecond, "Framerate: %3.0f FPS", fps);
 
    verticalOffset += STATS_PELS_PER_LINE;
    drawText(horizontalOffset, verticalOffset, scale, rotation, font, serverNodes, color);
    verticalOffset += STATS_PELS_PER_LINE;
    drawText(horizontalOffset, verticalOffset, scale, rotation, font, avatarNodes, color);
    verticalOffset += STATS_PELS_PER_LINE;
    drawText(horizontalOffset, verticalOffset, scale, rotation, font, framesPerSecond, color);

    if (_expanded) {
        char packetsPerSecondString[30];
        sprintf(packetsPerSecondString, "Pkts/sec: %d", packetsPerSecond);
        char averageMegabitsPerSecond[30];
        sprintf(averageMegabitsPerSecond, "Mbps: %3.2f", (float)bytesPerSecond * 8.f / 1000000.f);

        verticalOffset += STATS_PELS_PER_LINE;
        drawText(horizontalOffset, verticalOffset, scale, rotation, font, packetsPerSecondString, color);
        verticalOffset += STATS_PELS_PER_LINE;
        drawText(horizontalOffset, verticalOffset, scale, rotation, font, averageMegabitsPerSecond, color);
    }

    verticalOffset = 0;
    horizontalOffset = _lastHorizontalOffset + _generalStatsWidth +1;

    if (Menu::getInstance()->isOptionChecked(MenuOption::TestPing)) {
        int pingAudio = 0, pingAvatar = 0, pingVoxel = 0, pingVoxelMax = 0;

        NodeList* nodeList = NodeList::getInstance();
        SharedNodePointer audioMixerNode = nodeList->soloNodeOfType(NodeType::AudioMixer);
        SharedNodePointer avatarMixerNode = nodeList->soloNodeOfType(NodeType::AvatarMixer);

        pingAudio = audioMixerNode ? audioMixerNode->getPingMs() : 0;
        pingAvatar = avatarMixerNode ? avatarMixerNode->getPingMs() : 0;

        // Now handle voxel servers, since there could be more than one, we average their ping times
        unsigned long totalPingVoxel = 0;
        int voxelServerCount = 0;

        foreach (const SharedNodePointer& node, nodeList->getNodeHash()) {
            // TODO: this should also support particles and models
            if (node->getType() == NodeType::VoxelServer) {
                totalPingVoxel += node->getPingMs();
                voxelServerCount++;
                if (pingVoxelMax < node->getPingMs()) {
                    pingVoxelMax = node->getPingMs();
                }
            }
        }

        if (voxelServerCount) {
            pingVoxel = totalPingVoxel/voxelServerCount;
        }


        Audio* audio = Application::getInstance()->getAudio();
        const QHash<QUuid, AudioStreamStats>& audioMixerInjectedStreamAudioStatsMap = audio->getAudioMixerInjectedStreamAudioStatsMap();

        lines = _expanded ? 11 + (audioMixerInjectedStreamAudioStatsMap.size() + 2) * 3 : 3;
        drawBackground(backgroundColor, horizontalOffset, 0, _pingStatsWidth, lines * STATS_PELS_PER_LINE + 10);
        horizontalOffset += 5;

        char audioJitter[30];
        sprintf(audioJitter,
                "Buffer msecs %.1f",
                (float) (audio->getNetworkBufferLengthSamplesPerChannel() + (float) audio->getJitterBufferSamples()) /
                (float) audio->getNetworkSampleRate() * 1000.f);
        drawText(30, glWidget->height() - 22, scale, rotation, font, audioJitter, color);
        
        
        char audioPing[30];
        sprintf(audioPing, "Audio ping: %d", pingAudio);
                 
        char avatarPing[30];
        sprintf(avatarPing, "Avatar ping: %d", pingAvatar);
        char voxelAvgPing[30];
        sprintf(voxelAvgPing, "Voxel avg ping: %d", pingVoxel);

        verticalOffset += STATS_PELS_PER_LINE;
        drawText(horizontalOffset, verticalOffset, scale, rotation, font, audioPing, color);
        verticalOffset += STATS_PELS_PER_LINE;
        drawText(horizontalOffset, verticalOffset, scale, rotation, font, avatarPing, color);
        verticalOffset += STATS_PELS_PER_LINE;
        drawText(horizontalOffset, verticalOffset, scale, rotation, font, voxelAvgPing, color);

        if (_expanded) {
            char voxelMaxPing[30];
            sprintf(voxelMaxPing, "Voxel max ping: %d", pingVoxelMax);

            verticalOffset += STATS_PELS_PER_LINE;
            drawText(horizontalOffset, verticalOffset, scale, rotation, font, voxelMaxPing, color);

            char audioMixerStatsLabelString[] = "AudioMixer stats:";
            char streamStatsFormatLabelString[] = "lost%/lost_30s%";
            char streamStatsFormatLabelString2[] = "desired/avail_avg_10s/avail";
            char streamStatsFormatLabelString3[] = "gaps: min/max/avg, starv/ovfl";
            char streamStatsFormatLabelString4[] = "gaps_30s: (same), notmix/sdrop";
            
            verticalOffset += STATS_PELS_PER_LINE;
            drawText(horizontalOffset, verticalOffset, scale, rotation, font, audioMixerStatsLabelString, color);
            verticalOffset += STATS_PELS_PER_LINE;
            drawText(horizontalOffset, verticalOffset, scale, rotation, font, streamStatsFormatLabelString, color);
            verticalOffset += STATS_PELS_PER_LINE;
            drawText(horizontalOffset, verticalOffset, scale, rotation, font, streamStatsFormatLabelString2, color);
            verticalOffset += STATS_PELS_PER_LINE;
            drawText(horizontalOffset, verticalOffset, scale, rotation, font, streamStatsFormatLabelString3, color);
            verticalOffset += STATS_PELS_PER_LINE;
            drawText(horizontalOffset, verticalOffset, scale, rotation, font, streamStatsFormatLabelString4, color);

            char downstreamLabelString[] = " Downstream:";
            verticalOffset += STATS_PELS_PER_LINE;
            drawText(horizontalOffset, verticalOffset, scale, rotation, font, downstreamLabelString, color);

            char downstreamAudioStatsString[512];

            AudioStreamStats downstreamAudioStreamStats = audio->getDownstreamAudioStreamStats();

            sprintf(downstreamAudioStatsString, " mix: %.2f%%/%.2f%%, %u/%u/%u+%u", downstreamAudioStreamStats._packetStreamStats.getLostRate()*100.0f,
                downstreamAudioStreamStats._packetStreamWindowStats.getLostRate() * 100.0f,
                downstreamAudioStreamStats._ringBufferDesiredJitterBufferFrames, downstreamAudioStreamStats._ringBufferFramesAvailableAverage,
                downstreamAudioStreamStats._ringBufferFramesAvailable, audio->getFramesAvailableInAudioOutputBuffer());

            verticalOffset += STATS_PELS_PER_LINE;
            drawText(horizontalOffset, verticalOffset, scale, rotation, font, downstreamAudioStatsString, color);

            sprintf(downstreamAudioStatsString, "  %s/%s/%s, %u/%u", formatUsecTime(downstreamAudioStreamStats._timeGapMin).toLatin1().data(),
                formatUsecTime(downstreamAudioStreamStats._timeGapMax).toLatin1().data(),
                formatUsecTime(downstreamAudioStreamStats._timeGapAverage).toLatin1().data(),
                downstreamAudioStreamStats._ringBufferStarveCount, downstreamAudioStreamStats._ringBufferOverflowCount);

            verticalOffset += STATS_PELS_PER_LINE;
            drawText(horizontalOffset, verticalOffset, scale, rotation, font, downstreamAudioStatsString, color);

            sprintf(downstreamAudioStatsString, "  %s/%s/%s, %u/?", formatUsecTime(downstreamAudioStreamStats._timeGapWindowMin).toLatin1().data(),
                formatUsecTime(downstreamAudioStreamStats._timeGapWindowMax).toLatin1().data(),
                formatUsecTime(downstreamAudioStreamStats._timeGapWindowAverage).toLatin1().data(),
                downstreamAudioStreamStats._ringBufferConsecutiveNotMixedCount);

            verticalOffset += STATS_PELS_PER_LINE;
            drawText(horizontalOffset, verticalOffset, scale, rotation, font, downstreamAudioStatsString, color);

            
            char upstreamLabelString[] = " Upstream:";
            verticalOffset += STATS_PELS_PER_LINE;
            drawText(horizontalOffset, verticalOffset, scale, rotation, font, upstreamLabelString, color);

            char upstreamAudioStatsString[512];

            const AudioStreamStats& audioMixerAvatarAudioStreamStats = audio->getAudioMixerAvatarStreamAudioStats();

            sprintf(upstreamAudioStatsString, " mic: %.2f%%/%.2f%%, %u/%u/%u", audioMixerAvatarAudioStreamStats._packetStreamStats.getLostRate()*100.0f,
                audioMixerAvatarAudioStreamStats._packetStreamWindowStats.getLostRate() * 100.0f,
                audioMixerAvatarAudioStreamStats._ringBufferDesiredJitterBufferFrames, audioMixerAvatarAudioStreamStats._ringBufferFramesAvailableAverage,
                audioMixerAvatarAudioStreamStats._ringBufferFramesAvailable);

            verticalOffset += STATS_PELS_PER_LINE;
            drawText(horizontalOffset, verticalOffset, scale, rotation, font, upstreamAudioStatsString, color);

            sprintf(upstreamAudioStatsString, "  %s/%s/%s, %u/%u", formatUsecTime(audioMixerAvatarAudioStreamStats._timeGapMin).toLatin1().data(),
                formatUsecTime(audioMixerAvatarAudioStreamStats._timeGapMax).toLatin1().data(),
                formatUsecTime(audioMixerAvatarAudioStreamStats._timeGapAverage).toLatin1().data(),
                audioMixerAvatarAudioStreamStats._ringBufferStarveCount, audioMixerAvatarAudioStreamStats._ringBufferOverflowCount);

            verticalOffset += STATS_PELS_PER_LINE;
            drawText(horizontalOffset, verticalOffset, scale, rotation, font, upstreamAudioStatsString, color);

            sprintf(upstreamAudioStatsString, "  %s/%s/%s, %u/%u", formatUsecTime(audioMixerAvatarAudioStreamStats._timeGapWindowMin).toLatin1().data(),
                formatUsecTime(audioMixerAvatarAudioStreamStats._timeGapWindowMax).toLatin1().data(),
                formatUsecTime(audioMixerAvatarAudioStreamStats._timeGapWindowAverage).toLatin1().data(),
                audioMixerAvatarAudioStreamStats._ringBufferConsecutiveNotMixedCount, audioMixerAvatarAudioStreamStats._ringBufferSilentFramesDropped);

            verticalOffset += STATS_PELS_PER_LINE;
            drawText(horizontalOffset, verticalOffset, scale, rotation, font, upstreamAudioStatsString, color);

            foreach(const AudioStreamStats& injectedStreamAudioStats, audioMixerInjectedStreamAudioStatsMap) {

                sprintf(upstreamAudioStatsString, " inj: %.2f%%/%.2f%%, %u/%u/%u", injectedStreamAudioStats._packetStreamStats.getLostRate()*100.0f,
                    injectedStreamAudioStats._packetStreamWindowStats.getLostRate() * 100.0f,
                    injectedStreamAudioStats._ringBufferDesiredJitterBufferFrames, injectedStreamAudioStats._ringBufferFramesAvailableAverage,
                    injectedStreamAudioStats._ringBufferFramesAvailable);

                verticalOffset += STATS_PELS_PER_LINE;
                drawText(horizontalOffset, verticalOffset, scale, rotation, font, upstreamAudioStatsString, color);

                sprintf(upstreamAudioStatsString, "  %s/%s/%s, %u/%u", formatUsecTime(injectedStreamAudioStats._timeGapMin).toLatin1().data(),
                    formatUsecTime(injectedStreamAudioStats._timeGapMax).toLatin1().data(),
                    formatUsecTime(injectedStreamAudioStats._timeGapAverage).toLatin1().data(),
                    injectedStreamAudioStats._ringBufferStarveCount, injectedStreamAudioStats._ringBufferOverflowCount);

                verticalOffset += STATS_PELS_PER_LINE;
                drawText(horizontalOffset, verticalOffset, scale, rotation, font, upstreamAudioStatsString, color);

                sprintf(upstreamAudioStatsString, "  %s/%s/%s, %u/%u", formatUsecTime(injectedStreamAudioStats._timeGapWindowMin).toLatin1().data(),
                    formatUsecTime(injectedStreamAudioStats._timeGapWindowMax).toLatin1().data(),
                    formatUsecTime(injectedStreamAudioStats._timeGapWindowAverage).toLatin1().data(),
                    injectedStreamAudioStats._ringBufferConsecutiveNotMixedCount, injectedStreamAudioStats._ringBufferSilentFramesDropped);

                verticalOffset += STATS_PELS_PER_LINE;
                drawText(horizontalOffset, verticalOffset, scale, rotation, font, upstreamAudioStatsString, color);
            }
        }

        verticalOffset = 0;
        horizontalOffset = _lastHorizontalOffset + _generalStatsWidth + _pingStatsWidth + 2;
    }
    
    MyAvatar* myAvatar = Application::getInstance()->getAvatar();
    glm::vec3 avatarPos = myAvatar->getPosition();

    lines = _expanded ? 8 : 3;

    drawBackground(backgroundColor, horizontalOffset, 0, _geoStatsWidth, lines * STATS_PELS_PER_LINE + 10);
    horizontalOffset += 5;

    char avatarPosition[200];
    sprintf(avatarPosition, "Position: %.1f, %.1f, %.1f", avatarPos.x, avatarPos.y, avatarPos.z);
    char avatarVelocity[30];
    sprintf(avatarVelocity, "Velocity: %.1f", glm::length(myAvatar->getVelocity()));
    char avatarBodyYaw[30];
    sprintf(avatarBodyYaw, "Yaw: %.1f", myAvatar->getBodyYaw());
    char avatarMixerStats[200];

    verticalOffset += STATS_PELS_PER_LINE;
    drawText(horizontalOffset, verticalOffset, scale, rotation, font, avatarPosition, color);
    verticalOffset += STATS_PELS_PER_LINE;
    drawText(horizontalOffset, verticalOffset, scale, rotation, font, avatarVelocity, color);
    verticalOffset += STATS_PELS_PER_LINE;
    drawText(horizontalOffset, verticalOffset, scale, rotation, font, avatarBodyYaw, color);

    if (_expanded) {
        SharedNodePointer avatarMixer = NodeList::getInstance()->soloNodeOfType(NodeType::AvatarMixer);
        if (avatarMixer) {
            sprintf(avatarMixerStats, "Avatar Mixer: %.f kbps, %.f pps",
                    roundf(avatarMixer->getAverageKilobitsPerSecond()),
                    roundf(avatarMixer->getAveragePacketsPerSecond()));
        } else {
            sprintf(avatarMixerStats, "No Avatar Mixer");
        }

        verticalOffset += STATS_PELS_PER_LINE;
        drawText(horizontalOffset, verticalOffset, scale, rotation, font, avatarMixerStats, color);
        
        stringstream downloads;
        downloads << "Downloads: ";
        foreach (Resource* resource, ResourceCache::getLoadingRequests()) {
            downloads << (int)(resource->getProgress() * 100.0f) << "% ";
        }
        downloads << "(" << ResourceCache::getPendingRequestCount() << " pending)";
        
        verticalOffset += STATS_PELS_PER_LINE;
        drawText(horizontalOffset, verticalOffset, scale, rotation, font, downloads.str().c_str(), color);
        
        int internal = 0, leaves = 0;
        int sendProgress = 0, sendTotal = 0;
        int receiveProgress = 0, receiveTotal = 0;
        foreach (const SharedNodePointer& node, NodeList::getInstance()->getNodeHash()) {
            if (node->getType() == NodeType::MetavoxelServer) {
                QMutexLocker locker(&node->getMutex());
                MetavoxelClient* client = static_cast<MetavoxelSystemClient*>(node->getLinkedData());
                if (client) {
                    client->getData().countNodes(internal, leaves, Application::getInstance()->getMetavoxels()->getLOD());
                    client->getSequencer().addReliableChannelStats(sendProgress, sendTotal, receiveProgress, receiveTotal);
                }
            }
        }
        stringstream nodes;
        nodes << "Metavoxels: " << (internal + leaves);
        verticalOffset += STATS_PELS_PER_LINE;
        drawText(horizontalOffset, verticalOffset, scale, rotation, font, nodes.str().c_str(), color);
        
        stringstream nodeTypes;
        nodeTypes << "Internal: " << internal << "  Leaves: " << leaves;
        verticalOffset += STATS_PELS_PER_LINE;
        drawText(horizontalOffset, verticalOffset, scale, rotation, font, nodeTypes.str().c_str(), color);
        
        if (sendTotal > 0 || receiveTotal > 0) {
            stringstream reliableStats;
            if (sendTotal > 0) {
                reliableStats << "Upload: " << (sendProgress * 100 / sendTotal) << "%  ";
            }
            if (receiveTotal > 0) {
                reliableStats << "Download: " << (receiveProgress * 100 / receiveTotal) << "%";
            }
            verticalOffset += STATS_PELS_PER_LINE;
            drawText(horizontalOffset, verticalOffset, scale, rotation, font, reliableStats.str().c_str(), color);
        }
    }

    verticalOffset = 0;
    horizontalOffset = _lastHorizontalOffset + _generalStatsWidth + _pingStatsWidth + _geoStatsWidth + 3;

    VoxelSystem* voxels = Application::getInstance()->getVoxels();

    lines = _expanded ? 11 : 3;
    if (_expanded && Menu::getInstance()->isOptionChecked(MenuOption::AudioSpatialProcessing)) {
        lines += 9; // spatial audio processing adds 1 spacing line and 8 extra lines of info
    }

    if (_expanded && Menu::getInstance()->isOptionChecked(MenuOption::DisplayTimingDetails)) {
        // we will also include room for 1 line per timing record and a header
        lines += 1;

        const QMap<QString, PerformanceTimerRecord>& allRecords = PerformanceTimer::getAllTimerRecords();
        QMapIterator<QString, PerformanceTimerRecord> i(allRecords);
        while (i.hasNext()) {
            i.next();
            if (includeTimingRecord(i.key())) {
                lines++;
            }
        }
    }
    
    drawBackground(backgroundColor, horizontalOffset, 0, glWidget->width() - horizontalOffset, lines * STATS_PELS_PER_LINE + 10);
    horizontalOffset += 5;

    if (_expanded) {
        // Local Voxel Memory Usage
        voxelStats.str("");
        voxelStats << "Voxels Memory Nodes: " << VoxelTreeElement::getTotalMemoryUsage() / 1000000.f << "MB";
        verticalOffset += STATS_PELS_PER_LINE;
        drawText(horizontalOffset, verticalOffset, scale, rotation, font, (char*)voxelStats.str().c_str(), color);

        voxelStats.str("");
        voxelStats << 
                "Geometry RAM: " << voxels->getVoxelMemoryUsageRAM() / 1000000.f << "MB / " <<
                "VBO: " << voxels->getVoxelMemoryUsageVBO() / 1000000.f << "MB";
        if (voxels->hasVoxelMemoryUsageGPU()) {
            voxelStats << " / GPU: " << voxels->getVoxelMemoryUsageGPU() / 1000000.f << "MB";
        }
        verticalOffset += STATS_PELS_PER_LINE;
        drawText(horizontalOffset, verticalOffset, scale, rotation, font, (char*)voxelStats.str().c_str(), color);

        // Voxel Rendering
        voxelStats.str("");
        voxelStats.precision(4);
        voxelStats << "Voxel Rendering Slots Max: " << voxels->getMaxVoxels() / 1000.f << "K";
        verticalOffset += STATS_PELS_PER_LINE;
        drawText(horizontalOffset, verticalOffset, scale, rotation, font, (char*)voxelStats.str().c_str(), color);
    }

    voxelStats.str("");
    voxelStats.precision(4);
    voxelStats << "Drawn: " << voxels->getVoxelsWritten() / 1000.f << "K " <<
        "Abandoned: " << voxels->getAbandonedVoxels() / 1000.f << "K ";
    verticalOffset += STATS_PELS_PER_LINE;
    drawText(horizontalOffset, verticalOffset, scale, rotation, font, (char*)voxelStats.str().c_str(), color);

    // iterate all the current voxel stats, and list their sending modes, and total voxel counts
    std::stringstream sendingMode("");
    sendingMode << "Octree Sending Mode: [";
    int serverCount = 0;
    int movingServerCount = 0;
    unsigned long totalNodes = 0;
    unsigned long totalInternal = 0;
    unsigned long totalLeaves = 0;
    NodeToOctreeSceneStats* octreeServerSceneStats = Application::getInstance()->getOcteeSceneStats();
    for(NodeToOctreeSceneStatsIterator i = octreeServerSceneStats->begin(); i != octreeServerSceneStats->end(); i++) {
        //const QUuid& uuid = i->first;
        OctreeSceneStats& stats = i->second;
        serverCount++;
        if (_expanded) {
            if (serverCount > 1) {
                sendingMode << ",";
            }
            if (stats.isMoving()) {
                sendingMode << "M";
                movingServerCount++;
            } else {
                sendingMode << "S";
            }
        }

        // calculate server node totals
        totalNodes += stats.getTotalElements();
        if (_expanded) {
            totalInternal += stats.getTotalInternal();
            totalLeaves += stats.getTotalLeaves();                
        }
    }
    if (_expanded) {
        if (serverCount == 0) {
            sendingMode << "---";
        }
        sendingMode << "] " << serverCount << " servers";
        if (movingServerCount > 0) {
            sendingMode << " <SCENE NOT STABLE>";
        } else {
            sendingMode << " <SCENE STABLE>";
        }
        verticalOffset += STATS_PELS_PER_LINE;
        drawText(horizontalOffset, verticalOffset, scale, rotation, font, (char*)sendingMode.str().c_str(), color);
    }

    // Incoming packets
    if (_expanded) {
        voxelStats.str("");
        QString packetsString = locale.toString((int)voxelPacketsToProcess);
        QString maxString = locale.toString((int)_recentMaxPackets);
        voxelStats << "Voxel Packets to Process: " << qPrintable(packetsString)
                    << " [Recent Max: " << qPrintable(maxString) << "]";        
        verticalOffset += STATS_PELS_PER_LINE;
        drawText(horizontalOffset, verticalOffset, scale, rotation, font, (char*)voxelStats.str().c_str(), color);
    }

    if (_resetRecentMaxPacketsSoon && voxelPacketsToProcess > 0) {
        _recentMaxPackets = 0;
        _resetRecentMaxPacketsSoon = false;
    }
    if (voxelPacketsToProcess == 0) {
        _resetRecentMaxPacketsSoon = true;
    } else {
        if (voxelPacketsToProcess > _recentMaxPackets) {
            _recentMaxPackets = voxelPacketsToProcess;
        }
    }

    QString serversTotalString = locale.toString((uint)totalNodes); // consider adding: .rightJustified(10, ' ');

    // Server Voxels
    voxelStats.str("");
    voxelStats << "Server voxels: " << qPrintable(serversTotalString);
    verticalOffset += STATS_PELS_PER_LINE;
    drawText(horizontalOffset, verticalOffset, scale, rotation, font, (char*)voxelStats.str().c_str(), color);

    if (_expanded) {
        QString serversInternalString = locale.toString((uint)totalInternal);
        QString serversLeavesString = locale.toString((uint)totalLeaves);

        voxelStats.str("");
        voxelStats <<
            "Internal: " << qPrintable(serversInternalString) << "  " <<
            "Leaves: " << qPrintable(serversLeavesString) << "";
        verticalOffset += STATS_PELS_PER_LINE;
        drawText(horizontalOffset, verticalOffset, scale, rotation, font, (char*)voxelStats.str().c_str(), color);
    }

    unsigned long localTotal = VoxelTreeElement::getNodeCount();
    QString localTotalString = locale.toString((uint)localTotal); // consider adding: .rightJustified(10, ' ');

    // Local Voxels
    voxelStats.str("");
    voxelStats << "Local voxels: " << qPrintable(localTotalString);
    verticalOffset += STATS_PELS_PER_LINE;
    drawText(horizontalOffset, verticalOffset, scale, rotation, font, (char*)voxelStats.str().c_str(), color);

    if (_expanded) {
        unsigned long localInternal = VoxelTreeElement::getInternalNodeCount();
        unsigned long localLeaves = VoxelTreeElement::getLeafNodeCount();
        QString localInternalString = locale.toString((uint)localInternal);
        QString localLeavesString = locale.toString((uint)localLeaves);

        voxelStats.str("");
        voxelStats <<
            "Internal: " << qPrintable(localInternalString) << "  " <<
            "Leaves: " << qPrintable(localLeavesString) << "";
        verticalOffset += STATS_PELS_PER_LINE;
        drawText(horizontalOffset, verticalOffset, scale, rotation, font, (char*)voxelStats.str().c_str(), color);
    }

    // LOD Details
    if (_expanded) {
        voxelStats.str("");
        QString displayLODDetails = Menu::getInstance()->getLODFeedbackText();
        voxelStats << "LOD: You can see " << qPrintable(displayLODDetails.trimmed());
        verticalOffset += STATS_PELS_PER_LINE;
        drawText(horizontalOffset, verticalOffset, scale, rotation, font, (char*)voxelStats.str().c_str(), color);
    }

    PerformanceTimer::tallyAllTimerRecords();

    // TODO: the display of these timing details should all be moved to JavaScript
    if (_expanded && Menu::getInstance()->isOptionChecked(MenuOption::DisplayTimingDetails)) {
        // Timing details...
        const int TIMER_OUTPUT_LINE_LENGTH = 300;
        char perfLine[TIMER_OUTPUT_LINE_LENGTH];
        verticalOffset += STATS_PELS_PER_LINE;
        drawText(horizontalOffset, verticalOffset, scale, rotation, font, 
                "--------------------- Function -------------------- --msecs- -calls--", color);

        const QMap<QString, PerformanceTimerRecord>& allRecords = PerformanceTimer::getAllTimerRecords();
        QMapIterator<QString, PerformanceTimerRecord> i(allRecords);
        while (i.hasNext()) {
            i.next();
            if (includeTimingRecord(i.key())) {
                sprintf(perfLine, "%50s: %8.4f [%6llu]", qPrintable(i.key()),
                            (float)i.value().getMovingAverage() / (float)USECS_PER_MSEC,
                            i.value().getCount());
            
                verticalOffset += STATS_PELS_PER_LINE;
                drawText(horizontalOffset, verticalOffset, scale, rotation, font, perfLine, color);
            }
        }
    }

    if (_expanded && Menu::getInstance()->isOptionChecked(MenuOption::AudioSpatialProcessing)) {
        verticalOffset += STATS_PELS_PER_LINE; // space one line...
        
        const AudioReflector* audioReflector = Application::getInstance()->getAudioReflector();
    
        // add some reflection stats
        char reflectionsStatus[128];

        sprintf(reflectionsStatus, "Reflections: %d, Original: %s, Ears: %s, Source: %s, Normals: %s", 
                audioReflector->getReflections(),
                (Menu::getInstance()->isOptionChecked(MenuOption::AudioSpatialProcessingIncludeOriginal)
                    ? "included" : "silent"),
                (Menu::getInstance()->isOptionChecked(MenuOption::AudioSpatialProcessingSeparateEars)
                    ? "two" : "one"),
                (Menu::getInstance()->isOptionChecked(MenuOption::AudioSpatialProcessingStereoSource)
                    ? "stereo" : "mono"),
                (Menu::getInstance()->isOptionChecked(MenuOption::AudioSpatialProcessingSlightlyRandomSurfaces)
                    ? "random" : "regular")
                );
                
        verticalOffset += STATS_PELS_PER_LINE;
        drawText(horizontalOffset, verticalOffset, scale, rotation, font, reflectionsStatus, color);

        float preDelay = Menu::getInstance()->isOptionChecked(MenuOption::AudioSpatialProcessingPreDelay) ? 
                                        audioReflector->getPreDelay() : 0.0f;

        sprintf(reflectionsStatus, "Delay: pre: %6.3f, average %6.3f, max %6.3f, min %6.3f, speed: %6.3f", 
                preDelay,
                audioReflector->getAverageDelayMsecs(),
                audioReflector->getMaxDelayMsecs(),
                audioReflector->getMinDelayMsecs(),
                audioReflector->getSoundMsPerMeter());
                
        verticalOffset += STATS_PELS_PER_LINE;
        
        drawText(horizontalOffset, verticalOffset, scale, rotation, font, reflectionsStatus, color);
        
        bool distanceAttenuationDisabled = Menu::getInstance()->isOptionChecked(
                                                        MenuOption::AudioSpatialProcessingDontDistanceAttenuate);

        bool alternateDistanceAttenuationEnabled = Menu::getInstance()->isOptionChecked(
                                                        MenuOption::AudioSpatialProcessingAlternateDistanceAttenuate);
        
        sprintf(reflectionsStatus, "Attenuation: average %5.3f, max %5.3f, min %5.3f, %s: %5.3f", 
                audioReflector->getAverageAttenuation(),
                audioReflector->getMaxAttenuation(),
                audioReflector->getMinAttenuation(),
                (distanceAttenuationDisabled ? "Distance Factor [DISABLED]" : 
                    alternateDistanceAttenuationEnabled ? "Distance Factor [ALTERNATE]" : "Distance Factor [STANARD]"),
                audioReflector->getDistanceAttenuationScalingFactor());
                
        verticalOffset += STATS_PELS_PER_LINE;
        drawText(horizontalOffset, verticalOffset, scale, rotation, font, reflectionsStatus, color);

        sprintf(reflectionsStatus, "Local Audio: %s Attenuation: %5.3f", 
                (Menu::getInstance()->isOptionChecked(MenuOption::AudioSpatialProcessingProcessLocalAudio)
                    ? "yes" : "no"),
                audioReflector->getLocalAudioAttenuationFactor());
                
        verticalOffset += STATS_PELS_PER_LINE;
        drawText(horizontalOffset, verticalOffset, scale, rotation, font, reflectionsStatus, color);

        bool diffusionEnabled = Menu::getInstance()->isOptionChecked(MenuOption::AudioSpatialProcessingWithDiffusions);
        int fanout = diffusionEnabled ? audioReflector->getDiffusionFanout() : 0;
        int diffusionPaths = diffusionEnabled ? audioReflector->getDiffusionPathCount() : 0;
        sprintf(reflectionsStatus, "Diffusion: %s, Fanout: %d, Paths: %d", 
                    (diffusionEnabled ? "yes" : "no"), fanout, diffusionPaths);
                
        verticalOffset += STATS_PELS_PER_LINE;
        drawText(horizontalOffset, verticalOffset, scale, rotation, font, reflectionsStatus, color);

        const float AS_PERCENT = 100.0f;
        float reflectiveRatio = audioReflector->getReflectiveRatio() * AS_PERCENT;
        float diffusionRatio = audioReflector->getDiffusionRatio() * AS_PERCENT;
        float absorptionRatio = audioReflector->getAbsorptionRatio() * AS_PERCENT;
        sprintf(reflectionsStatus, "Ratios: Reflective: %5.3f, Diffusion: %5.3f, Absorption: %5.3f", 
                    reflectiveRatio, diffusionRatio, absorptionRatio);
                
        verticalOffset += STATS_PELS_PER_LINE;
        drawText(horizontalOffset, verticalOffset, scale, rotation, font, reflectionsStatus, color);

        sprintf(reflectionsStatus, "Comb Filter Window: %5.3f ms, Allowed: %d, Suppressed: %d", 
                    audioReflector->getCombFilterWindow(), 
                    audioReflector->getEchoesInjected(),
                    audioReflector->getEchoesSuppressed());
                
        verticalOffset += STATS_PELS_PER_LINE;
        drawText(horizontalOffset, verticalOffset, scale, rotation, font, reflectionsStatus, color);

        sprintf(reflectionsStatus, "Wet/Dry Mix: Original: %5.3f Echoes: %5.3f", 
                    audioReflector->getOriginalSourceAttenuation(), 
                    audioReflector->getEchoesAttenuation());
                
        verticalOffset += STATS_PELS_PER_LINE;
        drawText(horizontalOffset, verticalOffset, 0.10f, 0.f, 2.f, reflectionsStatus, color);

    }
    
    // draw local light stats
    int numLocalLights = myAvatar->getNumLocalLights();
    verticalOffset = 400;
    horizontalOffset = 20;
     
    char buffer[128];
    for (int i = 0; i < numLocalLights; i++) {
        glm::vec3 lightDirection = myAvatar->getLocalLightDirection(i); 
        snprintf(buffer, sizeof(buffer), "Light %d direction (%.2f, %.2f, %.2f)", i, lightDirection.x, lightDirection.y, lightDirection.z);
        drawText(horizontalOffset, verticalOffset, scale, rotation, font, buffer, color);
        
        verticalOffset += STATS_PELS_PER_LINE;

        glm::vec3 lightColor = myAvatar->getLocalLightColor(i);
        snprintf(buffer, sizeof(buffer), "Light %d color (%.2f, %.2f, %.2f)", i, lightColor.x, lightColor.y, lightColor.z);
        drawText(horizontalOffset, verticalOffset, scale, rotation, font, buffer, color);
        
        verticalOffset += STATS_PELS_PER_LINE;
    }
    

}