/*

 * Copyright (c) 2018-2021, Andreas Kling <kling@serenityos.org>

 *

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

 */

#pragma once

#include <AK/Function.h>

#include <LibWeb/DOM/DocumentLoadEventDelayer.h>

#include <LibWeb/HTML/CORSSettingAttribute.h>

#include <LibWeb/HTML/HTMLElement.h>

#include <LibWeb/HTML/Scripting/ImportMapParseResult.h>

#include <LibWeb/HTML/Scripting/Script.h>

#include <LibWeb/ReferrerPolicy/ReferrerPolicy.h>

namespace Web::HTML {

class HTMLScriptElement final : public HTMLElement {

    WEB_PLATFORM_OBJECT(HTMLScriptElement, HTMLElement);

    JS_DECLARE_ALLOCATOR(HTMLScriptElement);

public:

    virtual ~HTMLScriptElement() override;

    bool is_force_async() const { return m_force_async; }

    bool is_ready_to_be_parser_executed() const { return m_ready_to_be_parser_executed; }

    bool failed_to_load() const { return m_failed_to_load; }

    template<OneOf<XMLDocumentBuilder, HTMLParser> T>

    void set_parser_document(Badge<T>, DOM::Document& document) { m_parser_document = &document; }

Unexecuted instantiation: _ZN3Web4HTML17HTMLScriptElement19set_parser_documentITkN2AK8Concepts5OneOfINS_18XMLDocumentBuilderENS0_10HTMLParserEEES7_EEvNS3_5BadgeIT_EERNS_3DOM8DocumentE

Unexecuted instantiation: _ZN3Web4HTML17HTMLScriptElement19set_parser_documentITkN2AK8Concepts5OneOfINS_18XMLDocumentBuilderENS0_10HTMLParserEEES6_EEvNS3_5BadgeIT_EERNS_3DOM8DocumentE

    template<OneOf<XMLDocumentBuilder, HTMLParser> T>

    void set_force_async(Badge<T>, bool b) { m_force_async = b; }

Unexecuted instantiation: _ZN3Web4HTML17HTMLScriptElement15set_force_asyncITkN2AK8Concepts5OneOfINS_18XMLDocumentBuilderENS0_10HTMLParserEEES7_EEvNS3_5BadgeIT_EEb

Unexecuted instantiation: _ZN3Web4HTML17HTMLScriptElement15set_force_asyncITkN2AK8Concepts5OneOfINS_18XMLDocumentBuilderENS0_10HTMLParserEEES6_EEvNS3_5BadgeIT_EEb

    template<OneOf<XMLDocumentBuilder, HTMLParser> T>

    void set_already_started(Badge<T>, bool b) { m_already_started = b; }

    template<OneOf<XMLDocumentBuilder, HTMLParser> T>

    void prepare_script(Badge<T>) { prepare_script(); }

Unexecuted instantiation: _ZN3Web4HTML17HTMLScriptElement14prepare_scriptITkN2AK8Concepts5OneOfINS_18XMLDocumentBuilderENS0_10HTMLParserEEES7_EEvNS3_5BadgeIT_EE

Unexecuted instantiation: _ZN3Web4HTML17HTMLScriptElement14prepare_scriptITkN2AK8Concepts5OneOfINS_18XMLDocumentBuilderENS0_10HTMLParserEEES6_EEvNS3_5BadgeIT_EE

    void execute_script();

    bool is_parser_inserted() const { return !!m_parser_document; }

    virtual void inserted() override;

    // https://html.spec.whatwg.org/multipage/scripting.html#dom-script-supports

    static bool supports(JS::VM&, StringView type)

    {

        return type.is_one_of("classic"sv, "module"sv, "importmap"sv);

    }

    void set_source_line_number(Badge<HTMLParser>, size_t source_line_number) { m_source_line_number = source_line_number; }

    void unmark_as_already_started(Badge<DOM::Range>);

    void unmark_as_parser_inserted(Badge<DOM::Range>);

    String text() { return child_text_content(); }

    void set_text(String const& text) { string_replace_all(text); }

    [[nodiscard]] bool async() const;

    void set_async(bool);

private:

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

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

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

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

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

    // https://html.spec.whatwg.org/multipage/scripting.html#prepare-the-script-element

    void prepare_script();

    void begin_delaying_document_load_event(DOM::Document&);

    struct ResultState {

        struct Uninitialized { };

        struct Null { };

    };

    using Result = Variant<ResultState::Uninitialized, ResultState::Null, JS::NonnullGCPtr<HTML::Script>, JS::NonnullGCPtr<HTML::ImportMapParseResult>>;

    // https://html.spec.whatwg.org/multipage/scripting.html#mark-as-ready

    void mark_as_ready(Result);

    // https://html.spec.whatwg.org/multipage/scripting.html#parser-document

    JS::GCPtr<DOM::Document> m_parser_document;

    // https://html.spec.whatwg.org/multipage/scripting.html#preparation-time-document

    JS::GCPtr<DOM::Document> m_preparation_time_document;

    // https://html.spec.whatwg.org/multipage/scripting.html#script-force-async

    bool m_force_async { true };

    // https://html.spec.whatwg.org/multipage/scripting.html#already-started

    bool m_already_started { false };

    // https://html.spec.whatwg.org/multipage/scripting.html#concept-script-external

    bool m_from_an_external_file { false };

    bool m_script_ready { false };

    // https://html.spec.whatwg.org/multipage/scripting.html#ready-to-be-parser-executed

    bool m_ready_to_be_parser_executed { false };

    // https://html.spec.whatwg.org/multipage/scripting.html#attr-script-crossorigin

    CORSSettingAttribute m_crossorigin { CORSSettingAttribute::NoCORS };

    // https://html.spec.whatwg.org/multipage/scripting.html#attr-script-referrerpolicy

    ReferrerPolicy::ReferrerPolicy m_referrer_policy { ReferrerPolicy::ReferrerPolicy::EmptyString };

    bool m_failed_to_load { false };

    enum class ScriptType {

        Null,

        Classic,

        Module,

        ImportMap,

    };

    // https://html.spec.whatwg.org/multipage/scripting.html#concept-script-type

    ScriptType m_script_type { ScriptType::Null };

    // https://html.spec.whatwg.org/multipage/scripting.html#steps-to-run-when-the-result-is-ready

    Function<void()> m_steps_to_run_when_the_result_is_ready;

    // https://html.spec.whatwg.org/multipage/scripting.html#concept-script-result

    Result m_result { ResultState::Uninitialized {} };

    // https://html.spec.whatwg.org/multipage/scripting.html#concept-script-delay-load

    Optional<DOM::DocumentLoadEventDelayer> m_document_load_event_delayer;

    size_t m_source_line_number { 1 };

};

}

namespace Web::DOM {

template<>

inline bool Node::fast_is<HTML::HTMLScriptElement>() const { return is_html_script_element(); }

}