/*
 * Copyright (C) 2020 Igalia S.L. 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. AND ITS CONTRIBUTORS ``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 ITS 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

#if ENABLE(WEBXR)

#include "WebXRSpace.h"
#include "XRReferenceSpaceType.h"
#include <wtf/IsoMalloc.h>
#include <wtf/Ref.h>
#include <wtf/WeakPtr.h>

namespace WebCore {

class WebXRRigidTransform;
class WebXRSession;

class WebXRReferenceSpace : public RefCounted<WebXRReferenceSpace>, public WebXRSpace {
    WTF_MAKE_ISO_ALLOCATED(WebXRReferenceSpace);
public:
    static Ref<WebXRReferenceSpace> create(Document&, WebXRSession&, XRReferenceSpaceType);
    static Ref<WebXRReferenceSpace> create(Document&, WebXRSession&, Ref<WebXRRigidTransform>&&, XRReferenceSpaceType);

    virtual ~WebXRReferenceSpace();

    using RefCounted<WebXRReferenceSpace>::ref;
    using RefCounted<WebXRReferenceSpace>::deref;

    WebXRSession* session() const final { return m_session.get(); }
    std::optional<TransformationMatrix> nativeOrigin() const override;
    virtual ExceptionOr<Ref<WebXRReferenceSpace>> getOffsetReferenceSpace(const WebXRRigidTransform&);
    XRReferenceSpaceType type() const { return m_type; }

protected:
    WebXRReferenceSpace(Document&, WebXRSession&, Ref<WebXRRigidTransform>&&, XRReferenceSpaceType);

    bool isReferenceSpace() const final { return true; }

    std::optional<TransformationMatrix> floorOriginTransform() const;

    WeakPtr<WebXRSession> m_session;
    XRReferenceSpaceType m_type;

private:
    void refEventTarget() final { ref(); }
    void derefEventTarget() final { deref(); }
};

} // namespace WebCore

SPECIALIZE_TYPE_TRAITS_WEBXRSPACE(WebXRReferenceSpace, isReferenceSpace())

#endif // ENABLE(WEBXR)