/****************************************************************************
**
** Copyright (C) 2017 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
**
** This file is part of Qt 3D Studio.
**
** $QT_BEGIN_LICENSE:GPL$
** 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
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** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3 or (at your option) 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.GPL3
** included in the packaging of this file. Please review the following
** information to ensure the GNU General Public License requirements will
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****************************************************************************/

#ifndef Q3DSPRESENTATION_H
#define Q3DSPRESENTATION_H

#include <QtStudio3D/qstudio3dglobal.h>
#include <QtStudio3D/q3dsdatainput.h>
#include <QtCore/qobject.h>
#include <QtCore/qurl.h>
#include <QtCore/qvector.h>
#include <QtCore/qstringlist.h>
#include <QtStudio3D/q3dsdatainput.h>
#include <QtStudio3D/q3dsdataoutput.h>
#include <QtGui/qopengl.h>

QT_BEGIN_NAMESPACE

class Q3DSPresentationPrivate;
class Q3DSElement;
class Q3DSGeometry;
class QMouseEvent;
class QWheelEvent;
class QKeyEvent;
class QQmlImageProviderBase;

class Q_STUDIO3D_EXPORT Q3DSPresentation : public QObject
{
    Q_OBJECT
    Q_DECLARE_PRIVATE(Q3DSPresentation)
    Q_PROPERTY(QUrl source READ source WRITE setSource NOTIFY sourceChanged)
    Q_PROPERTY(QStringList variantList READ variantList WRITE setVariantList NOTIFY variantListChanged)
    Q_PROPERTY(bool delayedLoading READ delayedLoading WRITE setDelayedLoading NOTIFY delayedLoadingChanged)
    Q_PROPERTY(QStringList createdElements READ createdElements NOTIFY elementsCreated)
    Q_PROPERTY(QStringList createdMaterials READ createdMaterials NOTIFY materialsCreated)
    Q_PROPERTY(QStringList createdMeshes READ createdMeshes NOTIFY meshesCreated)
    Q_PROPERTY(QUrl shaderCacheFile READ shaderCacheFile WRITE setShaderCacheFile NOTIFY shaderCacheFileChanged REVISION 1)

public:
    explicit Q3DSPresentation(QObject *parent = nullptr);
    ~Q3DSPresentation();

    QUrl source() const;
    QStringList variantList() const;

    void registerElement(Q3DSElement *scene);
    void unregisterElement(Q3DSElement *scene);
    Q3DSElement *registeredElement(const QString &elementPath) const;

    void registerDataInput(Q3DSDataInput *dataInput);
    void unregisterDataInput(Q3DSDataInput *dataInput);
    Q3DSDataInput *registeredDataInput(const QString &name) const;
    void registerDataOutput(Q3DSDataOutput *dataOutput);
    void unregisterDataOutput(Q3DSDataOutput *dataOutput);
    Q3DSDataOutput *registeredDataOutput(const QString &name) const;

    Q_INVOKABLE QVariantList getDataInputs() const;
    QVector<Q3DSDataInput *> dataInputs() const;
    Q_INVOKABLE QVariantList getDataInputs(const QString &metadataKey) const;
    QVector<Q3DSDataInput *> dataInputs(const QString &metadataKey) const;
    Q_INVOKABLE QVariantList getDataOutputs() const;
    QVector<Q3DSDataOutput *> dataOutputs() const;

    bool delayedLoading() const;
    void setDelayedLoading(bool enable);

    Q_INVOKABLE void preloadSlide(const QString &elementPath);
    Q_INVOKABLE void unloadSlide(const QString &elementPath);

    Q_REVISION(1) Q_INVOKABLE void exportShaderCache(const QUrl &shaderCacheFile,
                                                     bool binaryShaders);
    Q_REVISION(1) Q_INVOKABLE void exportShaderCache(bool binaryShaders);
    void exportShaderCache(QByteArray &cacheData, bool binaryShaders);
    Q_REVISION(2) Q_INVOKABLE void exportShaderCache(const QUrl &shaderCacheFile,
                                                     bool binaryShaders, int compressionLevel);
    Q_REVISION(2) Q_INVOKABLE void exportShaderCache(bool binaryShaders, int compressionLevel);
    void exportShaderCache(QByteArray &cacheData, bool binaryShaders, int compressionLevel);
    void setShaderCacheData(const QByteArray &shaderCache);
    QUrl shaderCacheFile() const;

    // Input event handlers
    void mousePressEvent(QMouseEvent *e);
    void mouseReleaseEvent(QMouseEvent *e);
    void mouseMoveEvent(QMouseEvent *e);
    void wheelEvent(QWheelEvent *e);
    void keyPressEvent(QKeyEvent *e);
    void keyReleaseEvent(QKeyEvent *e);

    void createElement(const QString &parentElementPath, const QString &slideName,
                       const QHash<QString, QVariant> &properties);
    void createElements(const QString &parentElementPath, const QString &slideName,
                        const QVector<QHash<QString, QVariant>> &properties);
    void deleteElement(const QString &elementPath);
    void deleteElements(const QStringList &elementPaths);
    QStringList createdElements() const;

    void createMaterial(const QString &materialDefinition, const QString &subPresId = {});
    void createMaterials(const QStringList &materialDefinitions, const QString &subPresId = {});
    void deleteMaterial(const QString &materialName);
    void deleteMaterials(const QStringList &materialNames);
    QStringList createdMaterials() const;

    void createMesh(const QString &meshName, const Q3DSGeometry &geometry);
    void createMeshes(const QHash<QString, const Q3DSGeometry *> &meshData);
    void deleteMesh(const QString &meshName);
    void deleteMeshes(const QStringList &meshNames);
    QStringList createdMeshes() const;

    void addImageProvider(const QString &providerId, QQmlImageProviderBase *provider);

    uint textureId(const QString &elementPath);
    uint textureId(const QString &elementPath, QSize &size, GLenum &format);

public Q_SLOTS:
    void setSource(const QUrl &source);
    void setVariantList(const QStringList &variantList);
    void goToSlide(const QString &elementPath, unsigned int index);
    void goToSlide(const QString &elementPath, const QString &name);
    void goToSlide(const QString &elementPath, bool next, bool wrap);
    void goToTime(const QString &elementPath, float time);
    void setAttribute(const QString &elementPath, const QString &attributeName,
                      const QVariant &value);
    void setPresentationActive(const QString &id, bool active);
    void fireEvent(const QString &elementPath, const QString &eventName);
    void setGlobalAnimationTime(qint64 milliseconds);
    void setDataInputValue(const QString &name, const QVariant &value, bool force = false);
    void setShaderCacheFile(const QUrl &fileName);

Q_SIGNALS:
    void variantListChanged(const QStringList &variantList);
    void sourceChanged(const QUrl &source);
    void slideEntered(const QString &elementPath, unsigned int index, const QString &name);
    void slideExited(const QString &elementPath, unsigned int index, const QString &name);
    void dataInputsReady();
    void dataOutputsReady();
    void customSignalEmitted(const QString &elementPath, const QString &name);
    void delayedLoadingChanged(bool enable);
    void elementsCreated(const QStringList &elementPaths, const QString &error);
    void materialsCreated(const QStringList &materialNames, const QString &error);
    void meshesCreated(const QStringList &meshNames, const QString &error);
    void shaderCacheFileChanged(const QUrl &fileName);
    void shaderCacheExported(bool success);
    void shaderCacheLoadErrors(const QString &errors);

private:
    Q_DISABLE_COPY(Q3DSPresentation)
    Q3DSPresentationPrivate *d_ptr;

    friend class Q3DSPresentationItem;
    friend class Q3DSSurfaceViewerPrivate;
    friend class Q3DSRenderer;
    friend class Q3DSStudio3D;
    friend class Q3DSDataInput;
};

QT_END_NAMESPACE

#endif // Q3DSPRESENTATION_H
