/****************************************************************************
**
** Copyright (C) 2016 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of the plugins of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and The Qt Company. For licensing terms
** and conditions see https://www.qt.io/terms-conditions. For further
** information use the contact form at https://www.qt.io/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 3 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL3 included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 3 requirements
** will be met: https://www.gnu.org/licenses/lgpl-3.0.html.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 2.0 or (at your option) the GNU General
** Public license version 3 or any later version approved by the KDE Free
** Qt Foundation. The licenses are as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
** be met: https://www.gnu.org/licenses/gpl-2.0.html and
** https://www.gnu.org/licenses/gpl-3.0.html.
**
** $QT_END_LICENSE$
**
****************************************************************************/

#include "qdeclarative_sound_p.h"
#include "qdeclarative_audiocategory_p.h"
#include "qdeclarative_attenuationmodel_p.h"
#include "qdeclarative_soundinstance_p.h"
#include "qdeclarative_audioengine_p.h"
#include "qdebug.h"
#include "qrandom.h"

#define DEBUG_AUDIOENGINE

QT_USE_NAMESPACE

QDeclarativeSoundCone::QDeclarativeSoundCone(QObject *parent)
    : QObject(parent)
    , m_innerAngle(360)
    , m_outerAngle(360)
    , m_outerGain(0)
{
}

/*!
    \qmlproperty real Sound::cone.innerAngle

    This property holds the innerAngle for Sound definition.
    The range is [0, 360] degree. There is no directional attenuation
    within innerAngle.
*/
qreal QDeclarativeSoundCone::innerAngle() const
{
    return m_innerAngle;
}

void QDeclarativeSoundCone::setInnerAngle(qreal innerAngle)
{
    QDeclarativeSound *s = qobject_cast<QDeclarativeSound*>(parent());

    if (s && s->m_engine) {
        qWarning("SoundCone: innerAngle not changeable after initialization.");
        return;
    }

    if (innerAngle < 0 || innerAngle > 360) {
        qWarning() << "innerAngle should be within[0, 360] degrees";
        return;
    }
    m_innerAngle = innerAngle;
}

/*!
    \qmlproperty real Sound::cone.outerAngle

    This property holds the outerAngle for Sound definition.
    The range is [0, 360] degree. All audio output from this sound will be
    attenuated by \l {cone.outerGain}{outerGain} outside outerAngle.
*/
qreal QDeclarativeSoundCone::outerAngle() const
{
    return m_outerAngle;
}

void QDeclarativeSoundCone::setOuterAngle(qreal outerAngle)
{
    QDeclarativeSound *s = qobject_cast<QDeclarativeSound*>(parent());

    if (s && s->m_engine) {
        qWarning("SoundCone: outerAngle not changeable after initialization.");
        return;
    }

    if (outerAngle < 0 || outerAngle > 360) {
        qWarning() << "outerAngle should be within[0, 360] degrees";
        return;
    }
    m_outerAngle = outerAngle;
}

/*!
    \qmlproperty real Sound::cone.outerGain

    This property holds attenuation value for directional attenuation of this sound.
    The range is [0, 1]. All audio output from this sound will be attenuated by outerGain
    outside \l {cone.outerAngle}{outerAngle}.
*/
qreal QDeclarativeSoundCone::outerGain() const
{
    return m_outerGain;
}

void QDeclarativeSoundCone::setOuterGain(qreal outerGain)
{
    QDeclarativeSound *s = qobject_cast<QDeclarativeSound*>(parent());

    if (s && s->m_engine) {
        qWarning("SoundCone: outerGain not changeable after initialization.");
        return;
    }

    if (outerGain < 0 || outerGain > 1) {
        qWarning() << "outerGain should no less than 0 and no more than 1";
        return;
    }
    m_outerGain = outerGain;
}

void QDeclarativeSoundCone::setEngine(QDeclarativeAudioEngine *engine)
{
    if (m_engine) {
        qWarning("SoundCone: engine not changeable after initialization.");
        return;
    }

    if (m_outerAngle < m_innerAngle) {
        m_outerAngle = m_innerAngle;
    }

    m_engine = engine;
}

////////////////////////////////////////////////////////////
/*!
    \qmltype Sound
    \instantiates QDeclarativeSound
    \since 5.0
    \brief Define a variety of samples and parameters to be used for
    SoundInstance.
    \inqmlmodule QtAudioEngine
    \ingroup multimedia_audioengine
    \inherits Item
    \preliminary
    \deprecated

    Sound can be accessed through QtAudioEngine::AudioEngine::sounds with its unique name
    and must be defined inside AudioEngine or be added to it using
    \l{QtAudioEngine::AudioEngine::addSound()}{AudioEngine.addSound()}
    if \l Sound is created dynamically.

    \qml

    Rectangle {
        color:"white"
        width: 300
        height: 500

        AudioEngine {
            id:audioengine

            AudioSample {
                name:"explosion01"
                source: "explosion-01.wav"
            }

            AudioSample {
                name:"explosion02"
                source: "explosion-02.wav"
            }

            Sound {
                name:"explosion"
                playType: Sound.Random
                PlayVariation {
                    sample:"explosion01"
                    minPitch: 0.8
                    maxPitch: 1.1
                }
                PlayVariation {
                    sample:"explosion02"
                    minGain: 1.1
                    maxGain: 1.5
                }
            }
        }
        MouseArea {
            anchors.fill: parent
            onPressed: {
                audioengine.sounds["explosion"].play();
            }
        }
    }
    \endqml
*/

QDeclarativeSound::QDeclarativeSound(QObject *parent)
    : QObject(parent)
    , m_playType(Random)
    , m_attenuationModelObject(0)
    , m_categoryObject(0)
    , m_engine(0)
{
    m_cone = new QDeclarativeSoundCone(this);
}

QDeclarativeSound::~QDeclarativeSound()
{
}

/*!
    \qmlproperty enumeration QtAudioEngine::Sound::playType

    This property holds the playType.  It can be one of:

    \list
    \li Random - randomly picks up a play variation when playback is triggered
    \li Sequential - plays each variation in sequence when playback is triggered
    \endlist

    The default value is Random.
*/
QDeclarativeSound::PlayType QDeclarativeSound::playType() const
{
    return m_playType;
}

void QDeclarativeSound::setPlayType(PlayType playType)
{
    if (m_engine) {
        qWarning("Sound: playType not changeable after initialization.");
        return;
    }
    m_playType = playType;
}

/*!
    \qmlproperty string QtAudioEngine::Sound::category

    This property specifies which AudioCategory this sound belongs to.
*/
QString QDeclarativeSound::category() const
{
    return m_category;
}

void QDeclarativeSound::setCategory(const QString& category)
{
    if (m_engine) {
        qWarning("Sound: category not changeable after initialization.");
        return;
    }
    m_category = category;
}

/*!
    \qmlproperty string QtAudioEngine::Sound::name

    This property holds the name of Sound, must be unique among all sounds and only
    defined once.
*/
QString QDeclarativeSound::name() const
{
    return m_name;
}

void QDeclarativeSound::setName(const QString& name)
{
    if (m_engine) {
        qWarning("Sound: category not changeable after initialization.");
        return;
    }
    m_name = name;
}

/*!
    \qmlproperty string QtAudioEngine::Sound::attenuationModel

    This property specifies which attenuation model this sound will apply.
*/
QString QDeclarativeSound::attenuationModel() const
{
    return m_attenuationModel;
}

int QDeclarativeSound::genVariationIndex(int oldVariationIndex)
{
    if (m_playlist.count() == 0)
        return -1;

    if (m_playlist.count() == 1)
        return 0;

    switch (m_playType) {
        case QDeclarativeSound::Random: {
            if (oldVariationIndex < 0)
                oldVariationIndex = 0;
            return (oldVariationIndex + (QRandomGenerator::global()->bounded(m_playlist.count() + 1))) % m_playlist.count();
        }
        default:
            return (oldVariationIndex + 1) % m_playlist.count();
    }
}

QDeclarativePlayVariation* QDeclarativeSound::getVariation(int index)
{
    Q_ASSERT(index >= 0 && index < m_playlist.count());
    return m_playlist[index];
}

void QDeclarativeSound::setAttenuationModel(const QString &attenuationModel)
{
    if (m_engine) {
        qWarning("Sound: attenuationModel not changeable after initialization.");
        return;
    }
    m_attenuationModel = attenuationModel;
}

void QDeclarativeSound::setEngine(QDeclarativeAudioEngine *engine)
{
    if (m_engine) {
        qWarning("Sound: engine not changeable after initialization.");
        return;
    }
    m_cone->setEngine(engine);
    m_engine = engine;
}

QDeclarativeAudioEngine *QDeclarativeSound::engine() const
{
    return m_engine;
}

QDeclarativeSoundCone* QDeclarativeSound::cone() const
{
    return m_cone;
}

QDeclarativeAttenuationModel* QDeclarativeSound::attenuationModelObject() const
{
    return m_attenuationModelObject;
}

void QDeclarativeSound::setAttenuationModelObject(QDeclarativeAttenuationModel *attenuationModelObject)
{
    m_attenuationModelObject = attenuationModelObject;
}

QDeclarativeAudioCategory* QDeclarativeSound::categoryObject() const
{
    return m_categoryObject;
}

void QDeclarativeSound::setCategoryObject(QDeclarativeAudioCategory *categoryObject)
{
    m_categoryObject = categoryObject;
}

QQmlListProperty<QDeclarativePlayVariation> QDeclarativeSound::playVariationlist()
{
    return QQmlListProperty<QDeclarativePlayVariation>(this, 0, appendFunction, 0, 0, 0);
}

QList<QDeclarativePlayVariation*>& QDeclarativeSound::playlist()
{
    return m_playlist;
}

void QDeclarativeSound::appendFunction(QQmlListProperty<QDeclarativePlayVariation> *property, QDeclarativePlayVariation *value)
{
    QDeclarativeSound *sound = static_cast<QDeclarativeSound*>(property->object);
    if (sound->m_engine) {
        return;
    }
    sound->addPlayVariation(value);
}

/*!
    \qmlmethod QtAudioEngine::Sound::addPlayVariation(PlayVariation playVariation)

    Adds the given \a playVariation to sound.
    This can be used when the PlayVariation is created dynamically:

    \qml
    import QtAudioEngine 1.1

    AudioEngine {
        id: engine

        Component.onCompleted: {
            var playVariation = Qt.createQmlObject('import QtAudioEngine 1.1; PlayVariation {}', engine);
            playVariation.sample = "sample";
            playVariation.minPitch = 0.8
            playVariation.maxPitch = 1.1

            var sound = Qt.createQmlObject('import QtAudioEngine 1.1; Sound {}', engine);
            sound.name = "example";
            sound.addPlayVariation(playVariation);
            engine.addSound(sound);
        }
    }
    \endqml
*/
void QDeclarativeSound::addPlayVariation(QDeclarativePlayVariation *value)
{
    m_playlist.append(value);
    value->setEngine(m_engine);
}

/*!
    \qmlmethod QtAudioEngine::Sound::play()

    Creates a new \l SoundInstance and starts playing.
    Position, direction and velocity are all set to \c "0,0,0".
*/
void QDeclarativeSound::play()
{
    play(QVector3D(), QVector3D(), QVector3D(), 1, 1);
}

/*!
    \qmlmethod QtAudioEngine::Sound::play(gain)

    Creates a new SoundInstance and starts playing with the adjusted \a gain.
    Position, direction and velocity are all set to \c "0,0,0".
*/
void QDeclarativeSound::play(qreal gain)
{
    play(QVector3D(), QVector3D(), QVector3D(), gain, 1);
}

/*!
    \qmlmethod QtAudioEngine::Sound::play(gain, pitch)

    Creates a new SoundInstance and starts playing with the adjusted \a gain and \a pitch.
    Position, direction and velocity are all set to \c "0,0,0".
*/
void QDeclarativeSound::play(qreal gain, qreal pitch)
{
    play(QVector3D(), QVector3D(), QVector3D(), gain, pitch);
}

/*!
    \qmlmethod QtAudioEngine::Sound::play(position)

    Creates a new SoundInstance and starts playing with specified \a position.
    Direction and velocity are all set to \c "0,0,0".
*/
void QDeclarativeSound::play(const QVector3D& position)
{
    play(position, QVector3D(), QVector3D(), 1, 1);
}

/*!
    \qmlmethod QtAudioEngine::Sound::play(position, velocity)

    Creates a new SoundInstance and starts playing with specified \a position and \a velocity.
    Direction is set to \c "0,0,0".
*/
void QDeclarativeSound::play(const QVector3D& position, const QVector3D& velocity)
{
    play(position, velocity, QVector3D(), 1, 1);
}

/*!
    \qmlmethod QtAudioEngine::Sound::play(position, velocity, direction)

    Creates a new SoundInstance and starts playing with specified \a position, \a velocity and
    \a direction.
*/
void QDeclarativeSound::play(const QVector3D& position, const QVector3D& velocity,
                             const QVector3D& direction)
{
    play(position, velocity, direction, 1, 1);
}

/*!
    \qmlmethod QtAudioEngine::Sound::play(position, gain)

    Creates a new SoundInstance and starts playing with specified \a position and adjusted \a gain.
    Direction and velocity are all set to \c "0,0,0".
*/
void QDeclarativeSound::play(const QVector3D& position, qreal gain)
{
    play(position, QVector3D(), QVector3D(), gain, 1);
}

/*!
    \qmlmethod QtAudioEngine::Sound::play(position, velocity, gain)

    Creates a new SoundInstance and starts playing with specified \a position, \a velocity and
    adjusted \a gain.
    Direction is set to \c "0,0,0".
*/
void QDeclarativeSound::play(const QVector3D& position, const QVector3D& velocity, qreal gain)
{
    play(position, velocity, QVector3D(), gain, 1);
}

/*!
    \qmlmethod QtAudioEngine::Sound::play(position, velocity, direction, gain)

    Creates a new SoundInstance and starts playing with specified \a position, \a velocity,
    \a direction and adjusted \a gain.
*/
void QDeclarativeSound::play(const QVector3D& position, const QVector3D& velocity, const QVector3D& direction, qreal gain)
{
    play(position, velocity, direction, gain, 1);
}

/*!
    \qmlmethod QtAudioEngine::Sound::play(position, gain, pitch)

    Creates a new SoundInstance and starts playing with specified \a position, adjusted \a gain and
    \a pitch.
    Direction and velocity are all set to \c "0,0,0".
*/
void QDeclarativeSound::play(const QVector3D& position, qreal gain, qreal pitch)
{
    play(position, QVector3D(), QVector3D(), gain, pitch);
}

/*!
    \qmlmethod QtAudioEngine::Sound::play(position, velocity, gain, pitch)

    Creates a new SoundInstance and starts playing with specified \a position, \a velocity,
    adjusted \a gain and \a pitch.
    Direction is set to \c "0,0,0".
*/
void QDeclarativeSound::play(const QVector3D& position, const QVector3D& velocity, qreal gain, qreal pitch)
{
    play(position, velocity, QVector3D(), gain, pitch);
}

/*!
    \qmlmethod QtAudioEngine::Sound::play(position, velocity, direction, gain, pitch)

    Creates a new SoundInstance and starts playing with specified \a position, \a velocity,
    \a direction, adjusted \a gain and \a pitch.
*/
void QDeclarativeSound::play(const QVector3D& position, const QVector3D& velocity, const QVector3D& direction, qreal gain, qreal pitch)
{
    if (!m_engine) {
        qWarning() << "AudioEngine::play not ready!";
        return;
    }
    QDeclarativeSoundInstance *instance = this->newInstance(true);
    if (!instance)
        return;
    instance->setPosition(position);
    instance->setVelocity(velocity);
    instance->setDirection(direction);
    instance->setGain(gain);
    instance->setPitch(pitch);
    instance->setConeInnerAngle(cone()->innerAngle());
    instance->setConeOuterAngle(cone()->outerAngle());
    instance->setConeOuterGain(cone()->outerGain());
    instance->play();
#ifdef DEBUG_AUDIOENGINE
    qDebug() << "Sound[" << m_name << "] play ("
             << position << ","
             << velocity <<","
             << direction << ","
             << gain << ","
             << pitch << ")triggered";
#endif

}

/*!
    \qmlmethod QtAudioEngine::SoundInstance QtAudioEngine::Sound::newInstance()

    Returns a new \l SoundInstance.
*/
QDeclarativeSoundInstance* QDeclarativeSound::newInstance()
{
    return newInstance(false);
}

QDeclarativeSoundInstance* QDeclarativeSound::newInstance(bool managed)
{
    if (!m_engine) {
        qWarning("engine attrbiute must be set for Sound object!");
        return NULL;
    }

    QDeclarativeSoundInstance *instance =
            m_engine->newDeclarativeSoundInstance(managed);
    instance->setSound(m_name);
    return instance;
}