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#include "qandroidvideodeviceselectorcontrol.h"

#include "qandroidcamerasession.h"
#include "jcamera.h"

QT_BEGIN_NAMESPACE

QList<QByteArray> QAndroidVideoDeviceSelectorControl::m_names;
QStringList QAndroidVideoDeviceSelectorControl::m_descriptions;

QAndroidVideoDeviceSelectorControl::QAndroidVideoDeviceSelectorControl(QAndroidCameraSession *session)
    : QVideoDeviceSelectorControl(0)
    , m_selectedDevice(0)
    , m_cameraSession(session)
{
    if (m_names.isEmpty())
        update();
}

QAndroidVideoDeviceSelectorControl::~QAndroidVideoDeviceSelectorControl()
{
}

int QAndroidVideoDeviceSelectorControl::deviceCount() const
{
    return m_names.size();
}

QString QAndroidVideoDeviceSelectorControl::deviceName(int index) const
{
    return m_names.at(index);
}

QString QAndroidVideoDeviceSelectorControl::deviceDescription(int index) const
{
    return m_descriptions.at(index);
}

int QAndroidVideoDeviceSelectorControl::defaultDevice() const
{
    return 0;
}

int QAndroidVideoDeviceSelectorControl::selectedDevice() const
{
    return m_selectedDevice;
}

void QAndroidVideoDeviceSelectorControl::setSelectedDevice(int index)
{
    if (index != m_selectedDevice) {
        m_selectedDevice = index;
        m_cameraSession->setSelectedCamera(m_selectedDevice);
        emit selectedDeviceChanged(index);
        emit selectedDeviceChanged(deviceName(index));
    }
}

void QAndroidVideoDeviceSelectorControl::update()
{
    m_names.clear();
    m_descriptions.clear();

    QJNIObjectPrivate cameraInfo("android/hardware/Camera$CameraInfo");
    int numCameras = QJNIObjectPrivate::callStaticMethod<jint>("android/hardware/Camera",
                                                        "getNumberOfCameras");

    for (int i = 0; i < numCameras; ++i) {
        QJNIObjectPrivate::callStaticMethod<void>("android/hardware/Camera",
                                           "getCameraInfo",
                                           "(ILandroid/hardware/Camera$CameraInfo;)V",
                                           i, cameraInfo.object());

        JCamera::CameraFacing facing = JCamera::CameraFacing(cameraInfo.getField<jint>("facing"));

        switch (facing) {
        case JCamera::CameraFacingBack:
            m_names.append("back");
            m_descriptions.append(QStringLiteral("Rear-facing camera"));
            break;
        case JCamera::CameraFacingFront:
            m_names.append("front");
            m_descriptions.append(QStringLiteral("Front-facing camera"));
            break;
        default:
            break;
        }
    }
}

QList<QByteArray> QAndroidVideoDeviceSelectorControl::availableDevices()
{
    if (m_names.isEmpty())
        update();

    return m_names;
}

QString QAndroidVideoDeviceSelectorControl::availableDeviceDescription(const QByteArray &device)
{
    int i = m_names.indexOf(device);
    if (i != -1)
        return m_descriptions.at(i);

    return QString();
}

QT_END_NAMESPACE