#include <QDebug>
#include <QThread>
#include <QVector>
#include "aienginegimbalclient.h"
#include "aiengineinference.h"

AiEngineGimbalClient::AiEngineGimbalClient(QObject *parent)
    : QObject{parent}
{
    // Create server and run it in the new thread.
    // Connect all signal and slots here. No need to do the same in AiEngineGimbalServer class.

    mGimbalServer = new AiEngineGimbalServer();
    QThread *gimbalServerThread = new QThread(this);
    mGimbalServer->moveToThread(gimbalServerThread);

    // Client -> Server communication. Only zoomToAiTarget() signal is emitted ATM.
    connect(this, &AiEngineGimbalClient::setDronePosition,  mGimbalServer, &AiEngineGimbalServer::dronePositionSlot,  Qt::QueuedConnection);
    connect(this, &AiEngineGimbalClient::zoomToAiTarget,    mGimbalServer, &AiEngineGimbalServer::zoomToAiTargetSlot, Qt::QueuedConnection);
    connect(this, &AiEngineGimbalClient::setCameraPosition, mGimbalServer, &AiEngineGimbalServer::cameraPositionSlot, Qt::QueuedConnection);

    // Server -> Client communication
    connect(mGimbalServer, &AiEngineGimbalServer::aiTargetZoomed,    this, &AiEngineGimbalClient::aiTargetZoomedSlot, Qt::QueuedConnection);
    connect(mGimbalServer, &AiEngineGimbalServer::newCameraPosition, this, &AiEngineGimbalClient::cameraPositionSlot, Qt::QueuedConnection);

    gimbalServerThread->start();
}


void AiEngineGimbalClient::aiTargetZoomedSlot(AiEngineTargetPosition targetPosition)
{
    qDebug() << "AiEngineGimbalClient::aiTargetZoomedSlot() Server zoomed to index:"
             << targetPosition.targetIndex
             <<  "Geopos:"
             << targetPosition.position.lat
             << targetPosition.position.lon
             << targetPosition.position.alt;
}


void AiEngineGimbalClient::cameraPositionSlot(AiEngineCameraPosition cameraPosition)
{
    qDebug() << "AiEngineGimbalClient::cameraPositionSlot() Camera moved to:"
             << cameraPosition.pitch
             << cameraPosition.yaw
             << cameraPosition.zoom;
}


AiEngineRectangle AiEngineGimbalClient::getGroupCoordinates(QVector<AiEngineObject> &objects)
{
    AiEngineRectangle groupRectangle;
    groupRectangle.top    = 1000000;
    groupRectangle.left   = 1000000;
    groupRectangle.bottom = 0;
    groupRectangle.right  = 0;

    for (int i = 0; i < objects.size(); i++) {
        const AiEngineRectangle &objectRectangle = objects[i].rectangle;

        if (objectRectangle.top < groupRectangle.top) {
            groupRectangle.top = objectRectangle.top;
        }
        if (objectRectangle.left < groupRectangle.left) {
            groupRectangle.left = objectRectangle.left;
        }
        if (objectRectangle.bottom > groupRectangle.bottom) {
            groupRectangle.bottom = objectRectangle.bottom;
        }
        if (objectRectangle.right > groupRectangle.right) {
            groupRectangle.right = objectRectangle.right;
        }
    }

    return groupRectangle;
}


void AiEngineGimbalClient::inferenceResultSlot(AiEngineInferenceResult result)
{
    if (result.objects.size() == 0) {
        return;
    }

    // TODO!! Just increasing number for testing purposes ATM.
    static int index = 0;

    // Find best possible target ...
    int bestObjectIndex = -1;
    float bestObjectProb = -1;
    for (int i = 0; i < result.objects.size(); i++) {
        const AiEngineObject &object = result.objects[i];
        if (object.propability > bestObjectProb) {
            bestObjectIndex = i;
            bestObjectProb  = object.propability;
        }
    }

    // ... if found, then ask camera to zoom to it.
    if (bestObjectIndex >= 0) {
        const AiEngineObject &object = result.objects[bestObjectIndex];

        AiEngineCameraTarget target;
        target.rectangle = object.rectangle;
        target.index     = index++;

        qDebug() << "Found best target from index" << bestObjectIndex
                 << "Name:" << object.classStr
                 << "Probability:" << bestObjectProb;

        if (mGimbalServer->isAvailable()) {
            emit zoomToAiTarget(target);
        }
    }

    /*
    // We got list of all recognized objects, but at least for now we will zoom to all objects at
    // once and not for each invidually. Got minimal coordinates which contains the all objects.
    AiEngineRectangle groupRect = getGroupCoordinates(result.objects);

    if (groupRect.top > 600 || groupRect.bottom > 600) {
        qDebug() << "ERROR! inferenceResultSlot() groupRect.top > 600 || groupRect.bottom > 600";
        return;
    }

    if (groupRect.left > 600 || groupRect.right > 600) {
        qDebug() << "ERROR! inferenceResultSlot() groupRect.left > 600 || groupRect.right > 600";
        return;
    }

    if ((groupRect.bottom <= groupRect.top) || (groupRect.right <= groupRect.left)) {
        qDebug() << "ERROR! (groupRect.bottom <= groupRect.top) || (groupRect.right <= groupRect.left)";
        return;
    }

    qDebug() << "inferenceResultSlot() Zooming to square top=" << groupRect.top << "x" << groupRect.left << "and bottom:" << groupRect.bottom << "x" << groupRect.right;
    */
}