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#include "q3dsdatainput_p.h"
#include "q3dspresentation_p.h"
#include "q3dscommandqueue_p.h"

#include <QtCore/qdebug.h>

QT_BEGIN_NAMESPACE

/*!
    \qmltype DataInput
    \instantiates Q3DSDataInput
    \inqmlmodule Qt3DStudio
    \ingroup OpenGLRuntime
    \brief Controls a data input entry in a Qt 3D Studio presentation.
    This class is a convenience class for controlling a data input in a presentation.
    DataInput provides a clean contract between the presentation design and the code.
    It hides the presentation details from the code while providing a contractual access
    point to code for controlling aspects of the presentation (e.g. timeline of a
    subpresentation). It also allows the design to use a single DataInput to drive
    multiple aspects of the design (e.g. DataInput for speed can change the color of
    the speedometer, angle of the needle).

    \note There is a performance cost for each registered DataInput, so try to avoid
    creating unnecessary DataInputs.

    \sa Presentation, DataOutput, Presentation::slideExited, Presentation::slideEntered
    \sa Presentation::customSignalEmitted
*/

/*!
    \class Q3DSDataInput
    \inmodule OpenGLRuntime
    \since Qt 3D Studio 2.0
    \brief Controls a data input entry in a Qt 3D Studio presentation.
    This class is a convenience class for controlling a data input in a presentation.
    DataInput provides a clean contract between the presentation design and the code.
    It hides the presentation details from the code while providing a contractual access
    point to code for controlling aspects of the presentation (e.g. timeline of a
    subpresentation). It also allows the design to use a single DataInput to drive
    multiple aspects of the design (e.g. DataInput for speed can change the color of
    the speedometer, angle of the needle).

    \note There is a performance cost for each registered DataInput, so try to avoid
    creating unnecessary DataInputs.

    For other integration points between code and presentation see:
    \sa Q3DSPresentation::customSignalEmitted
    \sa Q3DSPresentation::slideEntered
    \sa Q3DSPresentation::slideExited
    \sa Q3DSDataOutput

    \sa Q3DSPresentation
*/

/*!
    \internal
 */
Q3DSDataInput::Q3DSDataInput(QObject *parent)
    : QObject(parent)
    , d_ptr(new Q3DSDataInputPrivate(this))
{
}

/*!
    \internal
 */
Q3DSDataInput::Q3DSDataInput(const QString &name, QObject *parent)
    : QObject(parent)
    , d_ptr(new Q3DSDataInputPrivate(this))
{
    d_ptr->m_name = name;
}

/*!
    Constructs a Q3DSDataInput instance and initializes the \a name. The
    constructed instance is automatically associated with the specified \a
    presentation. An optional \a parent object can be specified.
 */
Q3DSDataInput::Q3DSDataInput(Q3DSPresentation *presentation, const QString &name, QObject *parent)
    : QObject(parent)
    , d_ptr(new Q3DSDataInputPrivate(this))
{
    d_ptr->m_name = name;
    d_ptr->m_presentation = presentation;
    if (presentation)
        presentation->registerDataInput(this);
}

/*!
    \internal
 */
Q3DSDataInput::Q3DSDataInput(Q3DSDataInputPrivate *d, Q3DSPresentation *presentation,
                             const QString &name, QObject *parent)
    : QObject(parent)
    , d_ptr(d)
{
    d_ptr->m_name = name;
    d_ptr->m_presentation = presentation;
    if (presentation)
        presentation->registerDataInput(this);
}

/*!
    Destructor.
 */
Q3DSDataInput::~Q3DSDataInput()
{
    delete d_ptr;
}

/*!
    \qmlproperty string DataInput::name

    Specifies the name of the controlled data input element in the
    presentation. The name must match a name of a data input defined
    in the presentation. This property must be set before setting the
    value property.
 */

/*!
    \property Q3DSDataInput::name

    Specifies the name of the controlled data input element in the
    presentation. The name must match a name of a data input defined
    in the presentation.

    This property must be set before setting the value property.
    The initial value is provided via the constructor, but the name
    can also be changed later on.
 */
QString Q3DSDataInput::name() const
{
    return d_ptr->m_name;
}

void Q3DSDataInput::setName(const QString &name)
{
    if (d_ptr->m_name != name) {
        d_ptr->m_name = name;
        if (d_ptr->m_presentation)
            d_ptr->m_presentation->registerDataInput(this);
        Q_EMIT nameChanged();
    }
}

/*!
    \qmlproperty variant DataInput::value

    Specifies the value of the controlled data input element in the
    presentation.

    The value of this property only accounts for changes done via the same
    Q3DSDataInput instance. If the value of the same data input in the
    presentation is changed elsewhere, for example via animations or
    Q3DSPresentation::setAttribute(), those changes are not reflected in the
    value of this property. Due to this uncertainty, this property treats all
    value sets as changes even if the newly set value is the same value as the
    previous value.

    To get actual values from the presentation, use DataOutput.
    \sa DataOutput
*/
/*!
    \property Q3DSDataInput::value

    Specifies the value of the controlled data input element in the
    presentation.

    The value of this property only accounts for changes done via the same
    Q3DSDataInput instance. If the value of the same data input in the
    presentation is changed elsewhere, for example via animations or
    Q3DSPresentation::setAttribute(), those changes are not reflected in the
    value of this property. Due to this uncertainty, this property treats all
    value sets as changes even if the newly set value is the same value as the
    previous value.

    To get actual values from the presentation, use DataOutput.
    \sa DataOutput
*/
QVariant Q3DSDataInput::value() const
{
    return d_ptr->m_value;
}

/*!
   \property Q3DSDataInput::min

    Contains the minimum range value for datainput. Returned value is zero
    for datainput types other than \e {Ranged Number}.

    \note This value is read-only.
 */
float Q3DSDataInput::min() const
{
    if (!d_ptr->m_presentation)
        return 0.0f;

    return d_ptr->m_presentation->d_ptr->dataInputMin(d_ptr->m_name);
}

/*!
    \property Q3DSDataInput::max

    Contains the maximum range value for datainput. Returned value is zero
    for datainput types other than \e {Ranged Number}.

    \note This value is read-only.
 */
float Q3DSDataInput::max() const
{
    if (!d_ptr->m_presentation)
        return 0.0f;

    return d_ptr->m_presentation->d_ptr->dataInputMax(d_ptr->m_name);
}

/*!
    Returns true if presentation (or its subpresentation) associated with
    this datainput has a datainput definition with a matching name. Returns
    false if the datainput has no associated presentation, or if a match is not found.
 */
bool Q3DSDataInput::isValid() const
{
    if (d_ptr->m_presentation)
        return d_ptr->m_presentation->d_ptr->isValidDataInput(this);
    else
        return false;
}

/*!
    Returns the metadata defined for this datainput with metadata \a key.

    Metadata is user-defined key-value table that can be used, for example, to better describe the
    usage of, or to indicate the external data source that should be bound to this datainput.
    Metadata has no impact on presentation rendering.

    \note Datainput metadata is read-only.
 */
/*!
    \qmlmethod string DataInput::metadata
    Returns the metadata defined for this datainput with metadata \a key.

    Metadata is user-defined key-value table that can be used, for example, to better describe the
    usage of, or to indicate the external data source that should be bound to this datainput.
    Metadata has no impact on presentation rendering.

    \note Datainput metadata is read-only.
 */
QString Q3DSDataInput::metadata(const QString &key) const
{
    if (!d_ptr->m_presentation)
        return {};

    auto metadata = d_ptr->m_presentation->d_ptr->dataInputMetadata(name());

    return metadata[key];
}

/*!
    Returns the metadata keys defined for this datainput.

    \sa metadata
 */
/*!
    \qmlmethod var DataInput::metadataKeys
    Returns the metadata keys defined for this datainput.

    \note Datainput metadata is read-only.
    \sa metadata
 */
QStringList Q3DSDataInput::metadataKeys() const
{
    if (!d_ptr->m_presentation)
        return {};

    return d_ptr->m_presentation->d_ptr->dataInputMetadata(name()).keys();
}

/*!
    \brief Q3DSDataInput::setValue Set a new \a value for this data input.
    \note For performance reasons do not call setValue unnecessarily.
 */
void Q3DSDataInput::setValue(const QVariant &value)
{
    // Since properties controlled by data inputs can change without the current value being
    // reflected on the value of the DataInput element, we allow setting the value to the
    // same one it was previously and still consider it a change.
    // For example, when controlling timeline, the value set to DataInput will only be
    // the current value for one frame if presentation has a running animation.
    // In order to track an element property, see DataOutput API.
    d_ptr->setValue(value, ValueRole::Value);
    Q_EMIT valueChanged();
}

void Q3DSDataInputPrivate::setPresentation(Q3DSPresentation *presentation)
{
    m_presentation = presentation;
}

Q3DSDataInputPrivate::Q3DSDataInputPrivate(Q3DSDataInput *parent)
    : q_ptr(parent)
{
}

Q3DSDataInputPrivate::~Q3DSDataInputPrivate()
{
    if (m_presentation)
        m_presentation->unregisterDataInput(q_ptr);
}

void Q3DSDataInputPrivate::setValue(const QVariant &value, Q3DSDataInput::ValueRole valueRole)
{
    m_value = value;
    if (m_presentation)
        m_presentation->setDataInputValue(m_name, m_value, valueRole);
}

void Q3DSDataInputPrivate::setViewerApp(Q3DSViewer::Q3DSViewerApp *app)
{
    m_viewerApp = app;

    if (m_viewerApp && m_value.isValid())
        setValue(m_value);
}

void Q3DSDataInputPrivate::setCommandQueue(CommandQueue *queue)
{
    m_commandQueue = queue;

    if (m_commandQueue && m_value.isValid())
        setValue(m_value);
}


/*!
    \qmltype DataInput
    \instantiates Q3DSDataInput
    \inqmlmodule QtStudio3D
    \ingroup OpenGLRuntime

    \brief Controls a data input entry in a Qt 3D Studio presentation.

    This type is a convenience for controlling a data in a presentation. Its functionality is
    equivalent to \c{Presentation::setDataInputValue()}, however it has a big advantage
    of being able to use QML property bindings, thus avoiding the need to having to resort
    to a JavaScript function call for every value change.

    As an example:

    \qml
        Studio3D {
            ...
            Presentation {
                id: presentation
                ...
                property string text: ""
                DataInput {
                    name: "inputForSomeTextNode"
                    value: presentation.text
                }
            }
        }

        Button {
            onClicked: presentation.text = "Hello World"
        }
    \endqml

    The example assumes that a data input connection was made in Qt 3D Studio
    presentation using Qt 3D Studio editor between the \c textstring property of
    target property and a data input name \c inputForSomeTextNode. As the value
    is now set via a property, the full set of QML property bindings techniques
    are available.

    \sa Studio3D, Presentation
*/

/*!
    \qmlproperty string DataInput::name

    Specifies the name of the controlled data input element in the
    presentation. This property must be set as part of DataInput declaration,
    although it is changeable afterwards, if desired.
*/

/*!
    \qmlproperty variant DataInput::value

    Specifies the value of the controlled data input element in the presentation.

    The value of this property only accounts for changes done via the same
    DataInput instance. If the value of the underlying attribute in the
    presentation is changed elsewhere, for example via animations or
    Presentation::setAttribute(), those changes are not reflected in the value
    of this property. Due to this uncertainty, this property treats all value
    sets as changes even if the newly set value is the same value as the
    previous value.
*/

/*!
    \qmlproperty real DataInput::min

    Contains the minimum value of the controlled data input element range.

    This property is applicable only to data input type \e {Ranged Number}. For other
    types, value returned is zero.

    \note This value is read-only.
*/

/*!
    \qmlproperty real DataInput::max

    Contains the maximum value of the controlled data input element range.

    This property is applicable only to data input type \e {Ranged Number}. For other
    types, value returned is zero.

    \note This value is read-only.
*/

QT_END_NAMESPACE