/****************************************************************************
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** Copyright (C) 2021 The Qt Company Ltd.
** Contact: https://www.qt.io/licensing/
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** This file is part of the QtQml module of the Qt Toolkit.
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** 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.
**
** $QT_END_LICENSE$
**
**
**
**
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**
**
****************************************************************************/

#ifndef QQMLENGINE_H
#define QQMLENGINE_H

#include <QtCore/qurl.h>
#include <QtCore/qobject.h>
#include <QtCore/qmap.h>
#include <QtQml/qjsengine.h>
#include <QtQml/qqml.h>
#include <QtQml/qqmlerror.h>

QT_BEGIN_NAMESPACE

class QQmlAbstractUrlInterceptor;

class Q_QML_EXPORT QQmlImageProviderBase
{
public:
    enum ImageType {
        Image,
        Pixmap,
        Texture,
        Invalid,
        ImageResponse
        // ### Qt6: reorder these, and give Invalid a fixed large value
    };

    enum Flag {
        ForceAsynchronousImageLoading  = 0x01
    };
    Q_DECLARE_FLAGS(Flags, Flag)

    virtual ~QQmlImageProviderBase();

    virtual ImageType imageType() const = 0;
    virtual Flags flags() const = 0;

private:
    friend class QQuickImageProvider;
    QQmlImageProviderBase();
};
Q_DECLARE_OPERATORS_FOR_FLAGS(QQmlImageProviderBase::Flags)

class QQmlComponent;
class QQmlEnginePrivate;
class QQmlImportsPrivate;
class QQmlExpression;
class QQmlContext;
class QQmlType;
class QUrl;
#if QT_CONFIG(qml_network)
class QNetworkAccessManager;
class QQmlNetworkAccessManagerFactory;
#endif
class QQmlIncubationController;
class Q_QML_EXPORT QQmlEngine : public QJSEngine
{
    Q_PROPERTY(QString offlineStoragePath READ offlineStoragePath WRITE setOfflineStoragePath)
    Q_OBJECT
public:
    explicit QQmlEngine(QObject *p = nullptr);
    ~QQmlEngine() override;

    QQmlContext *rootContext() const;

    void clearComponentCache();
    void trimComponentCache();

    QStringList importPathList() const;
    void setImportPathList(const QStringList &paths);
    void addImportPath(const QString& dir);

    QStringList pluginPathList() const;
    void setPluginPathList(const QStringList &paths);
    void addPluginPath(const QString& dir);

    bool addNamedBundle(const QString &name, const QString &fileName);

#if QT_CONFIG(library)
    bool importPlugin(const QString &filePath, const QString &uri, QList<QQmlError> *errors);
#endif

#if QT_CONFIG(qml_network)
    void setNetworkAccessManagerFactory(QQmlNetworkAccessManagerFactory *);
    QQmlNetworkAccessManagerFactory *networkAccessManagerFactory() const;

    QNetworkAccessManager *networkAccessManager() const;
#endif

    void setUrlInterceptor(QQmlAbstractUrlInterceptor* urlInterceptor);
    QQmlAbstractUrlInterceptor* urlInterceptor() const;

    void addImageProvider(const QString &id, QQmlImageProviderBase *);
    QQmlImageProviderBase *imageProvider(const QString &id) const;
    void removeImageProvider(const QString &id);

    void setIncubationController(QQmlIncubationController *);
    QQmlIncubationController *incubationController() const;

    void setOfflineStoragePath(const QString& dir);
    QString offlineStoragePath() const;
    QString offlineStorageDatabaseFilePath(const QString &databaseName) const;

    QUrl baseUrl() const;
    void setBaseUrl(const QUrl &);

    bool outputWarningsToStandardError() const;
    void setOutputWarningsToStandardError(bool);

    template<typename T>
    T singletonInstance(int qmlTypeId);

public Q_SLOTS:
    void retranslate();

public:
    static QQmlContext *contextForObject(const QObject *);
    static void setContextForObject(QObject *, QQmlContext *);

    enum ObjectOwnership { CppOwnership, JavaScriptOwnership };
    static void setObjectOwnership(QObject *, ObjectOwnership);
    static ObjectOwnership objectOwnership(QObject *);
protected:
    QQmlEngine(QQmlEnginePrivate &dd, QObject *p);
    bool event(QEvent *) override;

Q_SIGNALS:
    void quit();
    void exit(int retCode);
    void warnings(const QList<QQmlError> &warnings);

private:
    Q_DISABLE_COPY(QQmlEngine)
    Q_DECLARE_PRIVATE(QQmlEngine)
};

template<>
Q_QML_EXPORT QJSValue QQmlEngine::singletonInstance<QJSValue>(int qmlTypeId);

template<typename T>
T QQmlEngine::singletonInstance(int qmlTypeId) {
    return qobject_cast<T>(singletonInstance<QJSValue>(qmlTypeId).toQObject());
}

QT_END_NAMESPACE

#endif // QQMLENGINE_H
