/*
 * Copyright (C) 2016-2018 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. 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

#include "NetworkActivityTracker.h"
#include "NetworkDataTask.h"
#include "NetworkLoadParameters.h"
#include <WebCore/NetworkLoadMetrics.h>
#include <wtf/RetainPtr.h>

OBJC_CLASS NSHTTPCookieStorage;
OBJC_CLASS NSURLSessionDataTask;

namespace WebKit {

class Download;
class NetworkSessionCocoa;
struct SessionWrapper;

class NetworkDataTaskCocoa final : public NetworkDataTask {
public:
    static Ref<NetworkDataTask> create(NetworkSession& session, NetworkDataTaskClient& client, const WebCore::ResourceRequest& request, WebCore::FrameIdentifier frameID, WebCore::PageIdentifier pageID, WebCore::StoredCredentialsPolicy storedCredentialsPolicy, WebCore::ContentSniffingPolicy shouldContentSniff, WebCore::ContentEncodingSniffingPolicy shouldContentEncodingSniff, bool shouldClearReferrerOnHTTPSToHTTPRedirect, PreconnectOnly shouldPreconnectOnly, bool dataTaskIsForMainFrameNavigation, bool dataTaskIsForMainResourceNavigationForAnyFrame, Optional<NetworkActivityTracker> networkActivityTracker)
    {
        return adoptRef(*new NetworkDataTaskCocoa(session, client, request, frameID, pageID, storedCredentialsPolicy, shouldContentSniff, shouldContentEncodingSniff, shouldClearReferrerOnHTTPSToHTTPRedirect, shouldPreconnectOnly, dataTaskIsForMainFrameNavigation, dataTaskIsForMainResourceNavigationForAnyFrame, networkActivityTracker));
    }

    ~NetworkDataTaskCocoa();

    using TaskIdentifier = uint64_t;

    void didSendData(uint64_t totalBytesSent, uint64_t totalBytesExpectedToSend);
    void didReceiveChallenge(WebCore::AuthenticationChallenge&&, ChallengeCompletionHandler&&);
    void didCompleteWithError(const WebCore::ResourceError&, const WebCore::NetworkLoadMetrics&);
    void didReceiveResponse(WebCore::ResourceResponse&&, ResponseCompletionHandler&&);
    void didReceiveData(Ref<WebCore::SharedBuffer>&&);

    void willPerformHTTPRedirection(WebCore::ResourceResponse&&, WebCore::ResourceRequest&&, RedirectCompletionHandler&&);
    void transferSandboxExtensionToDownload(Download&);

    void cancel() override;
    void resume() override;
    void invalidateAndCancel() override { }
    NetworkDataTask::State state() const override;

    void setPendingDownloadLocation(const String&, SandboxExtension::Handle&&, bool /*allowOverwrite*/) override;
    String suggestedFilename() const override;

    WebCore::NetworkLoadMetrics& networkLoadMetrics() { return m_networkLoadMetrics; }

    WebCore::FrameIdentifier frameID() const { return m_frameID; };
    WebCore::PageIdentifier pageID() const { return m_pageID; };

    String description() const override;

private:
    NetworkDataTaskCocoa(NetworkSession&, NetworkDataTaskClient&, const WebCore::ResourceRequest&, WebCore::FrameIdentifier, WebCore::PageIdentifier, WebCore::StoredCredentialsPolicy, WebCore::ContentSniffingPolicy, WebCore::ContentEncodingSniffingPolicy, bool shouldClearReferrerOnHTTPSToHTTPRedirect, PreconnectOnly, bool dataTaskIsForMainFrameNavigation, bool dataTaskIsForMainResourceNavigationForAnyFrame, Optional<NetworkActivityTracker>);

    bool tryPasswordBasedAuthentication(const WebCore::AuthenticationChallenge&, ChallengeCompletionHandler&);
    void applySniffingPoliciesAndBindRequestToInferfaceIfNeeded(__strong NSURLRequest*&, bool shouldContentSniff, bool shouldContentEncodingSniff);

    void restrictRequestReferrerToOriginIfNeeded(WebCore::ResourceRequest&);

#if ENABLE(RESOURCE_LOAD_STATISTICS)
    static NSHTTPCookieStorage *statelessCookieStorage();
    void blockCookies();
#endif
    bool isThirdPartyRequest(const WebCore::ResourceRequest&) const;
    bool isAlwaysOnLoggingAllowed() const;

    SessionWrapper& m_sessionWrapper;
    RefPtr<SandboxExtension> m_sandboxExtension;
    RetainPtr<NSURLSessionDataTask> m_task;
    WebCore::NetworkLoadMetrics m_networkLoadMetrics;
    WebCore::FrameIdentifier m_frameID;
    WebCore::PageIdentifier m_pageID;

#if ENABLE(RESOURCE_LOAD_STATISTICS)
    bool m_hasBeenSetToUseStatelessCookieStorage { false };
#endif

    bool m_isForMainResourceNavigationForAnyFrame { false };
    bool m_isAlwaysOnLoggingAllowed { false };
};

WebCore::Credential serverTrustCredential(const WebCore::AuthenticationChallenge&);

} // namespace WebKit