/*
 * Copyright (C) 2009 Google 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:
 *
 *     * Redistributions of source code must retain the above copyright
 * notice, this list of conditions and the following disclaimer.
 *     * 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.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
 * OWNER 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 "WebSocketIdentifier.h"
#include <wtf/Forward.h>
#include <wtf/Noncopyable.h>
#include <wtf/ObjectIdentifier.h>
#include <wtf/URL.h>

namespace JSC {
class ArrayBuffer;
}

namespace WebCore {

class Blob;
class Document;
class ResourceRequest;
class ResourceResponse;
class ScriptExecutionContext;
class SocketProvider;
class WebSocketChannel;
class WebSocketChannelInspector;
class WebSocketChannelClient;

using WebSocketChannelIdentifier = ObjectIdentifier<WebSocketChannel>;

class ThreadableWebSocketChannel {
    WTF_MAKE_NONCOPYABLE(ThreadableWebSocketChannel);
public:
    static RefPtr<ThreadableWebSocketChannel> create(Document&, WebSocketChannelClient&, SocketProvider&);
    static RefPtr<ThreadableWebSocketChannel> create(ScriptExecutionContext&, WebSocketChannelClient&, SocketProvider&);
    WEBCORE_EXPORT ThreadableWebSocketChannel();

    void ref() { refThreadableWebSocketChannel(); }
    void deref() { derefThreadableWebSocketChannel(); }

    WebSocketIdentifier identifier() const { return m_identifier; };

    enum class ConnectStatus { KO, OK };
    virtual ConnectStatus connect(const URL&, const String& protocol) = 0;
    virtual String subprotocol() = 0; // Will be available after didConnect() callback is invoked.
    virtual String extensions() = 0; // Will be available after didConnect() callback is invoked.

    enum SendResult { SendSuccess, SendFail };
    virtual SendResult send(CString&&) = 0;
    virtual SendResult send(const JSC::ArrayBuffer&, unsigned byteOffset, unsigned byteLength) = 0;
    virtual SendResult send(Blob&) = 0;

    virtual unsigned bufferedAmount() const = 0;
    virtual void close(int code, const String& reason) = 0;
    // Log the reason text and close the connection. Will call didClose().
    virtual void fail(String&& reason) = 0;
    virtual void disconnect() = 0; // Will suppress didClose().

    virtual void suspend() = 0;
    virtual void resume() = 0;

    virtual const WebSocketChannelInspector* channelInspector() const { return nullptr; };
    virtual WebSocketChannelIdentifier progressIdentifier() const = 0;
    virtual bool hasCreatedHandshake() const = 0;
    virtual bool isConnected() const = 0;
    using CookieGetter = Function<String(const URL&)>;
    virtual ResourceRequest clientHandshakeRequest(const CookieGetter&) const = 0;
    virtual const ResourceResponse& serverHandshakeResponse() const = 0;

    enum CloseEventCode {
        CloseEventCodeNotSpecified = -1,
        CloseEventCodeNormalClosure = 1000,
        CloseEventCodeGoingAway = 1001,
        CloseEventCodeProtocolError = 1002,
        CloseEventCodeUnsupportedData = 1003,
        CloseEventCodeFrameTooLarge = 1004,
        CloseEventCodeNoStatusRcvd = 1005,
        CloseEventCodeAbnormalClosure = 1006,
        CloseEventCodeInvalidFramePayloadData = 1007,
        CloseEventCodePolicyViolation = 1008,
        CloseEventCodeMessageTooBig = 1009,
        CloseEventCodeMandatoryExt = 1010,
        CloseEventCodeInternalError = 1011,
        CloseEventCodeTLSHandshake = 1015,
        CloseEventCodeMinimumUserDefined = 3000,
        CloseEventCodeMaximumUserDefined = 4999
    };
    
protected:
    virtual ~ThreadableWebSocketChannel() = default;
    virtual void refThreadableWebSocketChannel() = 0;
    virtual void derefThreadableWebSocketChannel() = 0;

    struct ValidatedURL {
        URL url;
        bool areCookiesAllowed { true };
    };
    WEBCORE_EXPORT static std::optional<ValidatedURL> validateURL(Document&, const URL&);
    WEBCORE_EXPORT static std::optional<ResourceRequest> webSocketConnectRequest(Document&, const URL&);

    WebSocketIdentifier m_identifier;
};

} // namespace WebCore
