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#include <QCameraFocusControl>

#include "qwinrtcameralockscontrol.h"
#include "qwinrtcameracontrol.h"

QT_BEGIN_NAMESPACE

QWinRTCameraLocksControl::QWinRTCameraLocksControl(QObject *parent)
    : QCameraLocksControl(parent)
    , m_supportedLocks(QCamera::NoLock)
    , m_focusLockStatus(QCamera::Unlocked)
{
}

QCamera::LockTypes QWinRTCameraLocksControl::supportedLocks() const
{
    return m_supportedLocks;
}

QCamera::LockStatus QWinRTCameraLocksControl::lockStatus(QCamera::LockType lock) const
{
    switch (lock) {
    case QCamera::LockFocus:
        return m_focusLockStatus;
    case QCamera::LockExposure:
    case QCamera::LockWhiteBalance:
    default:
        return QCamera::Unlocked;
    }
}

void QWinRTCameraLocksControl::searchAndLock(QCamera::LockTypes locks)
{
    QWinRTCameraControl *cameraControl = qobject_cast<QWinRTCameraControl *>(parent());
    Q_ASSERT(cameraControl);
    if (cameraControl->state() != QCamera::ActiveState)
        return;
    else if (locks.testFlag(QCamera::LockFocus))
        QMetaObject::invokeMethod(this, "searchAndLockFocus", Qt::QueuedConnection);
    else
        cameraControl->emitError(QCamera::InvalidRequestError, QStringLiteral("Unsupported camera lock type."));
}

void QWinRTCameraLocksControl::unlock(QCamera::LockTypes locks)
{
    if (locks.testFlag(QCamera::LockFocus))
        QMetaObject::invokeMethod(this, "unlockFocus", Qt::QueuedConnection);
}

void QWinRTCameraLocksControl::initialize()
{
    QWinRTCameraControl *cameraControl = qobject_cast<QWinRTCameraControl *>(parent());
    Q_ASSERT(cameraControl);
    QCameraFocusControl *focusControl = cameraControl->cameraFocusControl();
    Q_ASSERT(focusControl);
    if (focusControl->isFocusModeSupported(QCameraFocus::AutoFocus))
        m_supportedLocks |= QCamera::LockFocus;
}

void QWinRTCameraLocksControl::searchAndLockFocus()
{
    if (QCamera::Locked == m_focusLockStatus)
        unlockFocus();
    QWinRTCameraControl *cameraControl = qobject_cast<QWinRTCameraControl *>(parent());
    Q_ASSERT(cameraControl);
    QCameraFocusControl *focusControl = cameraControl->cameraFocusControl();
    Q_ASSERT(focusControl);
    if (focusControl->focusMode().testFlag(QCameraFocus::ContinuousFocus)) {
        cameraControl->emitError(QCamera::NotSupportedFeatureError, QStringLiteral("Camera can't lock focus in continuous focus mode."));
    } else {
        m_focusLockStatus = QCamera::Searching;
        emit lockStatusChanged(QCamera::LockFocus, m_focusLockStatus, QCamera::LockAcquired);
        if (cameraControl->focus()) {
            m_focusLockStatus = cameraControl->lockFocus() ? QCamera::Locked : QCamera::Unlocked;
            emit lockStatusChanged(QCamera::LockFocus, m_focusLockStatus, QCamera::LockAcquired);
        }
    }
}

void QWinRTCameraLocksControl::unlockFocus()
{
    if (QCamera::Unlocked == m_focusLockStatus)
        return;
    QWinRTCameraControl *cameraControl = qobject_cast<QWinRTCameraControl *>(parent());
    Q_ASSERT(cameraControl);
    m_focusLockStatus = cameraControl->unlockFocus() ? QCamera::Unlocked : QCamera::Locked;
    emit lockStatusChanged(QCamera::LockFocus, m_focusLockStatus, QCamera::UserRequest);
}

QT_END_NAMESPACE