/*
 * Copyright (C) 2017 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 "APIObject.h"
#include "HTTPCookieAcceptPolicy.h"
#include <WebCore/Cookie.h>
#include <wtf/CompletionHandler.h>
#include <wtf/Forward.h>
#include <wtf/HashSet.h>

namespace WebCore {
struct Cookie;
#if PLATFORM(COCOA)
class CookieStorageObserver;
#endif
}

namespace WebKit {
class WebCookieManagerProxy;
class WebsiteDataStore;
enum class HTTPCookieAcceptPolicy : uint8_t;
}

namespace API {

class APIWebCookieManagerProxyObserver;

class HTTPCookieStore final : public ObjectImpl<Object::Type::HTTPCookieStore> {
public:
    static Ref<HTTPCookieStore> create(WebKit::WebsiteDataStore& websiteDataStore)
    {
        return adoptRef(*new HTTPCookieStore(websiteDataStore));
    }

    virtual ~HTTPCookieStore();

    void cookies(CompletionHandler<void(const Vector<WebCore::Cookie>&)>&&);
    void setCookies(const Vector<WebCore::Cookie>&, CompletionHandler<void()>&&);
    void deleteCookie(const WebCore::Cookie&, CompletionHandler<void()>&&);
    
    void deleteAllCookies(CompletionHandler<void()>&&);
    void setHTTPCookieAcceptPolicy(WebKit::HTTPCookieAcceptPolicy, CompletionHandler<void()>&&);

    class Observer {
    public:
        virtual ~Observer() { }
        virtual void cookiesDidChange(HTTPCookieStore&) = 0;
    };

    void registerObserver(Observer&);
    void unregisterObserver(Observer&);

    void cookiesDidChange();
    void cookieManagerDestroyed();

private:
    HTTPCookieStore(WebKit::WebsiteDataStore&);

    void registerForNewProcessPoolNotifications();
    void unregisterForNewProcessPoolNotifications();

    static void flushDefaultUIProcessCookieStore();
    static Vector<WebCore::Cookie> getAllDefaultUIProcessCookieStoreCookies();
    static void setCookieInDefaultUIProcessCookieStore(const WebCore::Cookie&);
    static void deleteCookieFromDefaultUIProcessCookieStore(const WebCore::Cookie&);
    void startObservingChangesToDefaultUIProcessCookieStore(Function<void()>&&);
    void stopObservingChangesToDefaultUIProcessCookieStore();
    void deleteCookiesInDefaultUIProcessCookieStore();
    void setHTTPCookieAcceptPolicyInDefaultUIProcessCookieStore(WebKit::HTTPCookieAcceptPolicy);
    
    // FIXME: This is a reference cycle.
    Ref<WebKit::WebsiteDataStore> m_owningDataStore;
    HashSet<Observer*> m_observers;

    WebKit::WebCookieManagerProxy* m_observedCookieManagerProxy { nullptr };
    std::unique_ptr<APIWebCookieManagerProxyObserver> m_cookieManagerProxyObserver;
    bool m_observingUIProcessCookies { false };

    uint64_t m_processPoolCreationListenerIdentifier { 0 };

#if PLATFORM(COCOA)
    std::unique_ptr<WebCore::CookieStorageObserver> m_defaultUIProcessObserver;
#endif
};

}