/*

 * Copyright (c) 2024, Tim Ledbetter <tim.ledbetter@ladybird.org>

 *

 * SPDX-License-Identifier: BSD-2-Clause

 */

#pragma once

#include <LibGfx/ImmutableBitmap.h>

#include <LibJS/Heap/GCPtr.h>

#include <LibWeb/Layout/ImageProvider.h>

#include <LibWeb/SVG/SVGAnimatedLength.h>

#include <LibWeb/SVG/SVGGraphicsElement.h>

namespace Web::SVG {

class SVGImageElement

    : public SVGGraphicsElement

    , public SVGURIReferenceMixin<SupportsXLinkHref::Yes>

    , public Layout::ImageProvider {

    WEB_PLATFORM_OBJECT(SVGImageElement, SVGGraphicsElement);

public:

    virtual void attribute_changed(FlyString const& name, Optional<String> const& old_value, Optional<String> const& value) override;

    JS::NonnullGCPtr<SVG::SVGAnimatedLength> x();

    JS::NonnullGCPtr<SVG::SVGAnimatedLength> y();

    JS::NonnullGCPtr<SVG::SVGAnimatedLength> width();

    JS::NonnullGCPtr<SVG::SVGAnimatedLength> height();

    Gfx::Rect<CSSPixels> bounding_box() const;

    // FIXME: This is a hack for images used as CanvasImageSource. Do something more elegant.

    RefPtr<Gfx::Bitmap> bitmap() const

    {

        auto bitmap = current_image_bitmap();

        if (!bitmap)

            return nullptr;

        return bitmap->bitmap();

    }

    // ^Layout::ImageProvider

    virtual bool is_image_available() const override;

    virtual Optional<CSSPixels> intrinsic_width() const override;

    virtual Optional<CSSPixels> intrinsic_height() const override;

    virtual Optional<CSSPixelFraction> intrinsic_aspect_ratio() const override;

    virtual RefPtr<Gfx::ImmutableBitmap> current_image_bitmap(Gfx::IntSize = {}) const override;

    virtual void set_visible_in_viewport(bool) override { }

    virtual JS::NonnullGCPtr<DOM::Element const> to_html_element() const override { return *this; }

protected:

    SVGImageElement(DOM::Document&, DOM::QualifiedName);

    virtual void initialize(JS::Realm&) override;

    virtual void visit_edges(Cell::Visitor&) override;

    void process_the_url(Optional<String> const& href);

    void fetch_the_document(URL::URL const& url);

private:

    virtual JS::GCPtr<Layout::Node> create_layout_node(NonnullRefPtr<CSS::StyleProperties>) override;

    void animate();

    JS::GCPtr<SVG::SVGAnimatedLength> m_x;

    JS::GCPtr<SVG::SVGAnimatedLength> m_y;

    JS::GCPtr<SVG::SVGAnimatedLength> m_width;

    JS::GCPtr<SVG::SVGAnimatedLength> m_height;

    RefPtr<Core::Timer> m_animation_timer;

    size_t m_current_frame_index { 0 };

    size_t m_loops_completed { 0 };

    URL::URL m_href;

    JS::GCPtr<HTML::SharedResourceRequest> m_resource_request;

    Optional<DOM::DocumentLoadEventDelayer> m_load_event_delayer;

};

}