/*
 * Copyright (C) 2016 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.
 */

#ifndef ResourceLoadStatisticsStore_h
#define ResourceLoadStatisticsStore_h

#include "ResourceLoadStatistics.h"

namespace WebCore {

class KeyedDecoder;
class KeyedEncoder;
class URL;

struct ResourceLoadStatistics;

class ResourceLoadStatisticsStore : public RefCounted<ResourceLoadStatisticsStore> {
public:
    WEBCORE_EXPORT static Ref<ResourceLoadStatisticsStore> create();

    WEBCORE_EXPORT std::unique_ptr<KeyedEncoder> createEncoderFromData();
    WEBCORE_EXPORT void readDataFromDecoder(KeyedDecoder&);

    WEBCORE_EXPORT String statisticsForOrigin(const String&);

    bool isEmpty() const { return m_resourceStatisticsMap.isEmpty(); }
    size_t size() const { return m_resourceStatisticsMap.size(); }
    void clear() { m_resourceStatisticsMap.clear(); }

    ResourceLoadStatistics& ensureResourceStatisticsForPrimaryDomain(const String&);
    void setResourceStatisticsForPrimaryDomain(const String&, ResourceLoadStatistics&&);

    bool isPrevalentResource(const String&) const;
    
    WEBCORE_EXPORT void mergeStatistics(const Vector<ResourceLoadStatistics>&);
    WEBCORE_EXPORT Vector<ResourceLoadStatistics> takeStatistics();

    WEBCORE_EXPORT void setNotificationCallback(std::function<void()> handler);

    void fireDataModificationHandler();

    WEBCORE_EXPORT bool hasEnoughDataForStatisticsProcessing();
    WEBCORE_EXPORT void processStatistics(std::function<void(ResourceLoadStatistics&)>&&);
private:
    ResourceLoadStatisticsStore() = default;

    HashMap<String, ResourceLoadStatistics> m_resourceStatisticsMap;
    std::function<void()> m_dataAddedHandler;
};
    
} // namespace WebCore

#endif /* ResourceLoadStatisticsStore_h */