/*
 * Copyright (C) 2009-2018 Apple Inc. All rights reserved.
 * 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,
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 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

#pragma once

#include "CurlContext.h"
#include "SocketStreamHandle.h"
#include <pal/SessionID.h>
#include <wtf/Function.h>
#include <wtf/Lock.h>
#include <wtf/MessageQueue.h>
#include <wtf/RefCounted.h>
#include <wtf/StreamBuffer.h>
#include <wtf/Threading.h>
#include <wtf/UniqueArray.h>

namespace WebCore {

class SocketStreamHandleClient;
class StorageSessionProvider;

class SocketStreamHandleImpl : public SocketStreamHandle {
public:
    static Ref<SocketStreamHandleImpl> create(const URL& url, SocketStreamHandleClient& client, PAL::SessionID, const String&, SourceApplicationAuditToken&&, const StorageSessionProvider* provider) { return adoptRef(*new SocketStreamHandleImpl(url, client, provider)); }

    virtual ~SocketStreamHandleImpl();

    WEBCORE_EXPORT void platformSend(const uint8_t* data, size_t length, Function<void(bool)>&&) final;
    WEBCORE_EXPORT void platformSendHandshake(const uint8_t* data, size_t length, const Optional<CookieRequestHeaderFieldProxy>&, Function<void(bool, bool)>&&) final;
    WEBCORE_EXPORT void platformClose() final;

private:
    WEBCORE_EXPORT SocketStreamHandleImpl(const URL&, SocketStreamHandleClient&, const StorageSessionProvider*);

    size_t bufferedAmount() final;
    Optional<size_t> platformSendInternal(const uint8_t*, size_t);
    bool sendPendingData();

    void threadEntryPoint();
    void handleError(CURLcode);
    void stopThread();

    void callOnWorkerThread(Function<void()>&&);
    void executeTasks();

    static const size_t kReadBufferSize = 4 * 1024;

    RefPtr<const StorageSessionProvider> m_storageSessionProvider;
    RefPtr<Thread> m_workerThread;
    std::atomic<bool> m_running { true };

    MessageQueue<Function<void()>> m_taskQueue;

    bool m_hasPendingWriteData { false };
    size_t m_writeBufferSize { 0 };
    size_t m_writeBufferOffset { 0 };
    UniqueArray<uint8_t> m_writeBuffer;

    StreamBuffer<uint8_t, 1024 * 1024> m_buffer;
    static const unsigned maxBufferSize = 100 * 1024 * 1024;
};

} // namespace WebCore
