/*
 * Copyright (C) 2023-2025 Apple Inc. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY APPLE INC. ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE INC. OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
 * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#pragma once

#include "JSDOMGlobalObject.h"
#include "JSValueInWrappedObject.h"
#include <JavaScriptCore/Strong.h>
#include <wtf/RefCounted.h>

namespace WebCore {

class InternalReadableStream;
class InternalTransformStream;
class InternalWritableStream;
class JSDOMGlobalObject;
class MessagePort;
class ReadableStream;
class WritableStream;
template<typename> class ExceptionOr;

struct DetachedTransformStream {
    Ref<MessagePort> readablePort;
    Ref<MessagePort> writablePort;
};

class TransformStream : public RefCounted<TransformStream> {
public:
    static ExceptionOr<Ref<TransformStream>> create(JSC::JSGlobalObject&, JSC::Strong<JSC::JSObject>&&, JSC::Strong<JSC::JSObject>&&, JSC::Strong<JSC::JSObject>&&);
    static Ref<TransformStream> create(Ref<ReadableStream>&&, Ref<WritableStream>&&);

    ~TransformStream();

    ReadableStream& readable() { return m_readable.get(); }
    WritableStream& writable() { return m_writable.get(); }

    JSValueInWrappedObject& internalTransformStream() LIFETIME_BOUND { return m_internalTransformStream; }

    bool canTransfer() const;
    ExceptionOr<DetachedTransformStream> runTransferSteps(JSDOMGlobalObject&);
    static ExceptionOr<Ref<TransformStream>> runTransferReceivingSteps(JSDOMGlobalObject&, DetachedTransformStream&&);

private:
    TransformStream(Ref<ReadableStream>&&, Ref<WritableStream>&&);
    TransformStream(JSC::JSGlobalObject&, JSC::JSValue internalTransformStream, Ref<ReadableStream>&&, Ref<WritableStream>&&);

    JSValueInWrappedObject m_internalTransformStream;
    const Ref<ReadableStream> m_readable;
    const Ref<WritableStream> m_writable;
};

} // namespace WebCore
