/*

 * Copyright (c) 2022-2023, Linus Groh <linusg@serenityos.org>

 *

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

 */

#pragma once

#include <AK/Forward.h>

#include <LibJS/Forward.h>

#include <LibJS/Heap/GCPtr.h>

#include <LibWeb/Bindings/PlatformObject.h>

#include <LibWeb/Bindings/RequestPrototype.h>

#include <LibWeb/Fetch/Body.h>

#include <LibWeb/Fetch/BodyInit.h>

#include <LibWeb/Fetch/Headers.h>

#include <LibWeb/Fetch/Infrastructure/HTTP/Requests.h>

#include <LibWeb/Forward.h>

namespace Web::Fetch {

// https://fetch.spec.whatwg.org/#requestinfo

using RequestInfo = Variant<JS::Handle<Request>, String>;

// https://fetch.spec.whatwg.org/#requestinit

struct RequestInit {

    Optional<String> method;

    Optional<HeadersInit> headers;

    Optional<Optional<BodyInit>> body;

    Optional<String> referrer;

    Optional<Bindings::ReferrerPolicy> referrer_policy;

    Optional<Bindings::RequestMode> mode;

    Optional<Bindings::RequestCredentials> credentials;

    Optional<Bindings::RequestCache> cache;

    Optional<Bindings::RequestRedirect> redirect;

    Optional<String> integrity;

    Optional<bool> keepalive;

    Optional<JS::GCPtr<DOM::AbortSignal>> signal;

    Optional<Bindings::RequestDuplex> duplex;

    Optional<Bindings::RequestPriority> priority;

    Optional<JS::Value> window;

    // https://infra.spec.whatwg.org/#map-is-empty

    bool is_empty() const

    {

        return !(method.has_value()

            || headers.has_value()

            || body.has_value()

            || referrer.has_value()

            || referrer_policy.has_value()

            || mode.has_value()

            || credentials.has_value()

            || cache.has_value()

            || redirect.has_value()

            || integrity.has_value()

            || keepalive.has_value()

            || signal.has_value()

            || duplex.has_value()

            || priority.has_value()

            || window.has_value());

    }

};

// https://fetch.spec.whatwg.org/#request

class Request final

    : public Bindings::PlatformObject

    , public BodyMixin {

    WEB_PLATFORM_OBJECT(Request, Bindings::PlatformObject);

    JS_DECLARE_ALLOCATOR(Request);

public:

    [[nodiscard]] static JS::NonnullGCPtr<Request> create(JS::Realm&, JS::NonnullGCPtr<Infrastructure::Request>, Headers::Guard, JS::NonnullGCPtr<DOM::AbortSignal>);

    static WebIDL::ExceptionOr<JS::NonnullGCPtr<Request>> construct_impl(JS::Realm&, RequestInfo const& input, RequestInit const& init = {});

    virtual ~Request() override;

    // ^BodyMixin

    virtual Optional<MimeSniff::MimeType> mime_type_impl() const override;

    virtual JS::GCPtr<Infrastructure::Body> body_impl() override;

    virtual JS::GCPtr<Infrastructure::Body const> body_impl() const override;

    virtual Bindings::PlatformObject& as_platform_object() override { return *this; }

    virtual Bindings::PlatformObject const& as_platform_object() const override { return *this; }

    [[nodiscard]] JS::NonnullGCPtr<Infrastructure::Request> request() const { return m_request; }

    // JS API functions

    [[nodiscard]] String method() const;

    [[nodiscard]] String url() const;

    [[nodiscard]] JS::NonnullGCPtr<Headers> headers() const;

    [[nodiscard]] Bindings::RequestDestination destination() const;

    [[nodiscard]] String referrer() const;

    [[nodiscard]] Bindings::ReferrerPolicy referrer_policy() const;

    [[nodiscard]] Bindings::RequestMode mode() const;

    [[nodiscard]] Bindings::RequestCredentials credentials() const;

    [[nodiscard]] Bindings::RequestCache cache() const;

    [[nodiscard]] Bindings::RequestRedirect redirect() const;

    [[nodiscard]] String integrity() const;

    [[nodiscard]] bool keepalive() const;

    [[nodiscard]] bool is_reload_navigation() const;

    [[nodiscard]] bool is_history_navigation() const;

    [[nodiscard]] JS::NonnullGCPtr<DOM::AbortSignal> signal() const;

    [[nodiscard]] Bindings::RequestDuplex duplex() const;

    [[nodiscard]] WebIDL::ExceptionOr<JS::NonnullGCPtr<Request>> clone() const;

private:

    Request(JS::Realm&, JS::NonnullGCPtr<Infrastructure::Request>);

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

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

    // https://fetch.spec.whatwg.org/#concept-request-request

    // A Request object has an associated request (a request).

    JS::NonnullGCPtr<Infrastructure::Request> m_request;

    // https://fetch.spec.whatwg.org/#request-headers

    // A Request object also has an associated headers (null or a Headers object), initially null.

    JS::GCPtr<Headers> m_headers;

    // https://fetch.spec.whatwg.org/#request-signal

    // A Request object has an associated signal (null or an AbortSignal object), initially null.

    JS::GCPtr<DOM::AbortSignal> m_signal;

};

}