#include "view.h"

#include "inputcontroller.h"

#include "keycontroller.h"

#include "accelerometercontroller.h"

#include "magnetometercontroller.h"

#include "rotationcontroller.h"

#include "orientationcontroller.h"

#include "compasscontroller.h"

int View::m_imageWidth;

int View::m_imageHeight;

QString View::m_currentSensor;

View::View(QGraphicsScene *scene) :

        QGraphicsView(scene), m_timer(this) ,m_delay(30){

    m_controller = 0;

    QPixmap bgPix(":/images/koskipuisto_pieni.jpg");

    m_pix = bgPix;

    m_imageWidth = bgPix.width();

    m_imageHeight = bgPix.height();

    int h= height();

    int y = qAbs(m_imageHeight-h)/2;

    setSceneRect(0, y, width(), h);

    setViewportUpdateMode(QGraphicsView::BoundingRectViewportUpdate);

    setBackgroundBrush(bgPix);

    setCacheMode(QGraphicsView::CacheBackground);

    setRenderHints(QPainter::Antialiasing | QPainter::SmoothPixmapTransform);

    setWindowTitle("Panorama");

    m_sensors.append(InputController::QACCELEROMETER);

    m_sensors.append(InputController::QORIENTATIONSENSOR);

    m_sensors.append(InputController::QMAGNETOMETER);

    m_sensors.append(InputController::QROTATIONSENSOR);

    m_sensors.append(InputController::QTAPSENSOR);

    m_sensors.append(InputController::QCOMPASS);

    m_sensors.append(InputController::QKEYS);

    m_menu = new QMenu(this);

    createActions();

    handleAction(NULL,InputController::QACCELEROMETER);

    m_timer.setSingleShot(false);

    m_timer.start(m_delay);

    connect(&m_timer, SIGNAL(timeout()), this, SLOT(update()));

}

View::~View(){ if (m_controller) delete m_controller;}

void View::resizeEvent(QResizeEvent *event)

{

    QGraphicsView::resizeEvent(event);

    fitInView(sceneRect(), Qt::KeepAspectRatio);

}

void View::handleAction(QString oldSensor, QString newSensor){

    m_menu->setVisible(false);

    if (oldSensor==newSensor) return;

    QList<QAction*> tmpActions = m_menu->actions();

    for (int i=0; i<tmpActions.length(); i++){

        if (tmpActions.at(i)->text() ==  oldSensor){

            tmpActions.at(i)->setEnabled(true);

            continue;

        }

        if (tmpActions.at(i)->text() == newSensor){

            tmpActions.at(i)->setEnabled(false);

        }

    }

    m_currentSensor = newSensor;

    switchController(m_currentSensor);

}

void View::createActions()

{

    for (int i=0; i<m_sensors.length();i++){

        QAction* tmp = new QAction(m_sensors.at(i), this);

        const QString sensor = m_sensors.at(i);

        do{

            if (sensor==InputController::QACCELEROMETER){

                connect(tmp, SIGNAL(triggered()), this, SLOT(startAccelerometer()));

                break;

            }

            if (sensor==InputController::QORIENTATIONSENSOR){

                connect(tmp, SIGNAL(triggered()), this, SLOT(startOrientationSensor()));

                break;

            }

            if (sensor==InputController::QROTATIONSENSOR){

                connect(tmp, SIGNAL(triggered()), this, SLOT(startRotationSensor()));

                break;

            }

            if (sensor==InputController::QMAGNETOMETER){

                connect(tmp, SIGNAL(triggered()), this, SLOT(startMagnetometer()));

                break;

            }

            if (sensor==InputController::QTAPSENSOR){

                connect(tmp, SIGNAL(triggered()), this, SLOT(startTapSensor()));

                break;

            }

            if (sensor==InputController::QCOMPASS){

                connect(tmp, SIGNAL(triggered()), this, SLOT(startCompass()));

                break;

            }

            if (sensor==InputController::QKEYS){

                connect(tmp, SIGNAL(triggered()), this, SLOT(startKeys()));

                break;

            }

        }while (true);

        m_menu->addAction(tmp);

    }

}

void View::startAccelerometer(){

    handleAction(m_currentSensor, InputController::QACCELEROMETER);

}

void View::startOrientationSensor(){

    handleAction(m_currentSensor, InputController::QORIENTATIONSENSOR);

}

void View::startTapSensor(){

    handleAction(m_currentSensor, InputController::QTAPSENSOR);

}

void View::startMagnetometer(){

    handleAction(m_currentSensor, InputController::QMAGNETOMETER);

}

void View::startRotationSensor(){

    handleAction(m_currentSensor, InputController::QROTATIONSENSOR);

}

void View::startKeys(){

    handleAction(m_currentSensor, InputController::QKEYS);

}

void View::startCompass(){

    handleAction(m_currentSensor, InputController::QCOMPASS);

}

void View::update(){

    if (m_mouseMode){

        m_x = checkX(m_x + m_dx);

        m_y = checkY(m_y+ m_dy);

    }

    else{

        if (m_controller){

            m_x = checkX(m_controller->getX());

            m_y = checkY(m_controller->getY());

        }

    }

    setSceneRect(m_x, m_y, width(), height());

}

void View::keyPressEvent(QKeyEvent *e)

{

    if (m_currentSensor!=InputController::QKEYS) return;

    if (m_controller) m_controller->keyPressEvent(e);

}

void View::switchController(QString sensor){

    if (m_controller){

        delete m_controller;

        m_controller =0;

    }

    do{

        if (sensor==InputController::QACCELEROMETER){

            m_controller = new AccelerometerController();

            break;

        }

        if (sensor==InputController::QROTATIONSENSOR){

            m_controller = new RotationController();

            break;

        }

        if (sensor==InputController::QMAGNETOMETER){

            m_controller = new MagnetometerController();

            break;

        }

        if (sensor==InputController::QORIENTATIONSENSOR){

            m_controller = new OrientationController();

            break;

        }

        if (sensor==InputController::QTAPSENSOR){

            break;

        }

        if (sensor==InputController::QCOMPASS){

            m_controller = new CompassController();

            break;

        }

        if (sensor==InputController::QKEYS){

            m_controller = new KeyController();

            break;

        }

    }while (true);

    if (m_controller) m_controller->start();

}

int View::checkX(int x){

    return qAbs(x) < m_imageWidth ? x : x % m_imageWidth;

}

int View::checkY(int y){

    int limit = m_imageHeight-height();

    if (y<0){

        y = limit<0?-limit/2:0;

        if (m_controller) m_controller->setY(y);

        return y;

    }

    if (limit<0){

        y=-limit/2;

        if (m_controller) m_controller->setY(y);

        return y;

    }

    if (y< limit){ return y;}

    y = limit;

    if (m_controller) m_controller->setY(y);

    return y;

}

void View::mousePressEvent ( QMouseEvent* ){

    m_mousePressTime = QTime::currentTime();

    m_exController = m_controller;

    m_mouseMode = false;

}

void View::mouseMoveEvent(QMouseEvent* event){

    if (m_mouseMode){

        m_dx = m_eventX - event->x();

        m_dy = m_eventY - event->y();

        update();

        m_eventX = event->x();

        m_eventY = event->y();

        return;

    }

    if (m_mousePressTime.msecsTo(QTime::currentTime())>200){

        m_menu->setVisible(false);

        m_mouseMode = true;

        m_eventX = event->x();

        m_eventY = event->y();

        m_controller = 0;

    }

}

void View::mouseReleaseEvent(QMouseEvent* event){

    m_controller = m_exController;

    if (m_mouseMode){

        if (m_controller){

            m_controller->setX(m_x);

            m_controller->setY(m_y);

        }

    }

    m_mouseMode = false;

    if (m_mousePressTime.msecsTo(QTime::currentTime())>200) return;

    int x = event->x();

    int y = event->y();

    m_menu->move(x, y);

    m_menu->setVisible(true);

}