/* ============================================================
 *
 * This file is a part of digiKam project
 * https://www.digikam.org
 *
 * Date        : 2023-05-15
 * Description : geolocation engine based on Marble.
 *               (c) 2007-2022 Marble Team
 *               https://invent.kde.org/education/marble/-/raw/master/data/credits_authors.html
 *
 * SPDX-FileCopyrightText: 2023-2024 by Gilles Caulier <caulier dot gilles at gmail dot com>
 *
 * SPDX-License-Identifier: LGPL-2.1-or-later
 *
 * ============================================================ */

#pragma once

// Qt includes

#include <QSize>

// Local includes

#include "GeoDataColorStyle.h"
#include "GeoDataHotSpot.h"
#include "digikam_export.h"

namespace Marble
{

class GeoDataIconStylePrivate;
class RemoteIconLoader;

// Limits for the user in case of scaling the icon too much
static const QSize s_maximumIconSize = QSize(100, 100);
static const QSize s_minimumIconSize = QSize(10, 10);

/**
 */
class DIGIKAM_EXPORT GeoDataIconStyle : public GeoDataColorStyle
{
public:

    GeoDataIconStyle();
    GeoDataIconStyle(const GeoDataIconStyle& other);
    explicit GeoDataIconStyle(const QString& iconPath,
                              const QPointF& hotSpot = QPointF(0.5, 0.5));
    ~GeoDataIconStyle() override;

    GeoDataIconStyle& operator=(const GeoDataIconStyle& other);

    bool operator==(const GeoDataIconStyle& other) const;
    bool operator!=(const GeoDataIconStyle& other) const;

    /// Provides type information for downcasting a GeoData
    const char* nodeType() const override;

    void setIcon(const QImage& icon);
    QImage icon() const;

    /**
     * @brief Returns a scaled version of label icon
     * @return  the scaled icon
     */
    QImage scaledIcon() const;

    /**
     * @brief setIconPath Set the path to load the icon from. Any existing icon is invalidated.
     * @param filename Path to the icon to load. Can also be a virtual file system like qrc:/
     */
    void setIconPath(const QString& filename);
    QString iconPath() const;

    void setHotSpot(const QPointF& hotSpot, GeoDataHotSpot::Units xunits, GeoDataHotSpot::Units yunits);
    QPointF hotSpot(GeoDataHotSpot::Units& xunits, GeoDataHotSpot::Units& yunits) const;

    /**
     * @brief setSize Change the size of @see icon(). A null size (0, 0) is treated as a request to keep
     * the original icon size. Otherwise the icon will be scaled to the given size. This is especially useful
     * for vector graphics like .svg or to keep the memory footprint low when loading large images.
     * @param size Size in pixel that @see icon() should have. When the icon was previously set by #setIcon,
     * it is resized unless a null size is passed. Otherwise icon() will be scaled to the given size.
     * @param aspectRatioMode Aspect ratio mode.
     */
    void setSize(const QSize& size, Qt::AspectRatioMode aspectRatioMode = Qt::KeepAspectRatio);

    /**
     * @brief size Returns the size @see icon() will have if it can be loaded from @see iconPath.
     * A null size (default) is returned to indicate that the original size of the icon is used.
     * @return size specified by @see setSize
     */
    QSize size() const;

    void setScale(float scale);
    float scale() const;

    int heading() const;
    void setHeading(int heading);

    RemoteIconLoader* remoteIconLoader() const;

    /*
     * Serializable methods
     */
    void pack(QDataStream& stream) const override;
    void unpack(QDataStream& stream) override;

private:

    GeoDataIconStylePrivate* const d = nullptr;
};

} // namespace Marble
