/*

 * Copyright (c) 2020, Andreas Kling <kling@serenityos.org>

 *

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

 */

#pragma once

#include <LibCore/Forward.h>

#include <LibGfx/Forward.h>

#include <LibWeb/HTML/FormAssociatedElement.h>

#include <LibWeb/HTML/HTMLElement.h>

#include <LibWeb/HTML/NavigableContainer.h>

#include <LibWeb/Layout/ImageProvider.h>

#include <LibWeb/Loader/Resource.h>

namespace Web::HTML {

class HTMLObjectElement final

    : public NavigableContainer

    , public FormAssociatedElement

    , public ResourceClient

    , public Layout::ImageProvider {

    WEB_PLATFORM_OBJECT(HTMLObjectElement, NavigableContainer)

    JS_DECLARE_ALLOCATOR(HTMLObjectElement);

    FORM_ASSOCIATED_ELEMENT(NavigableContainer, HTMLObjectElement)

    enum class Representation {

        Unknown,

        Image,

        NestedBrowsingContext,

        Children,

    };

public:

    virtual ~HTMLObjectElement() override;

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

    virtual void form_associated_element_was_removed(DOM::Node*) override;

    String data() const;

    void set_data(String const& data) { MUST(set_attribute(HTML::AttributeNames::data, data)); }

    String type() const { return get_attribute_value(HTML::AttributeNames::type); }

    // ^FormAssociatedElement

    // https://html.spec.whatwg.org/multipage/forms.html#category-listed

    virtual bool is_listed() const override { return true; }

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

private:

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

    virtual bool is_html_object_element() const override { return true; }

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

    virtual void apply_presentational_hints(CSS::StyleProperties&) const override;

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

    bool has_ancestor_media_element_or_object_element_not_showing_fallback_content() const;

    void queue_element_task_to_run_object_representation_steps();

    void run_object_representation_handler_steps(Optional<ByteString> resource_type);

    void run_object_representation_completed_steps(Representation);

    void run_object_representation_fallback_steps();

    void load_image();

    void update_layout_and_child_objects(Representation);

    // ^ResourceClient

    virtual void resource_did_load() override;

    virtual void resource_did_fail() override;

    // ^DOM::Element

    virtual i32 default_tab_index_value() const override;

    // ^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; }

    Representation m_representation { Representation::Unknown };

    JS::GCPtr<DecodedImageData> image_data() const;

    JS::GCPtr<SharedResourceRequest> m_resource_request;

};

}

namespace Web::DOM {

template<>

inline bool Node::fast_is<HTML::HTMLObjectElement>() const { return is_html_object_element(); }

}