/*
 * 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. 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

#if ENABLE(ENCRYPTED_MEDIA)

#include "CDM.h"
#include "CDMFactory.h"
#include "CDMInstance.h"
#include "CDMInstanceSession.h"
#include "CDMPrivate.h"
#include "MediaKeyEncryptionScheme.h"
#include "MediaKeysRequirement.h"
#include <wtf/HashMap.h>
#include <wtf/RefCounted.h>
#include <wtf/Vector.h>
#include <wtf/WeakPtr.h>

namespace WebCore {

class MockCDMFactory : public RefCounted<MockCDMFactory>, public CanMakeWeakPtr<MockCDMFactory>, private CDMFactory {
public:
    static Ref<MockCDMFactory> create() { return adoptRef(*new MockCDMFactory); }
    ~MockCDMFactory();

    const Vector<AtomString>& supportedDataTypes() const { return m_supportedDataTypes; }
    void setSupportedDataTypes(Vector<String>&&);

    const Vector<MediaKeySessionType>& supportedSessionTypes() const { return m_supportedSessionTypes; }
    void setSupportedSessionTypes(Vector<MediaKeySessionType>&& types) { m_supportedSessionTypes = WTFMove(types); }

    const Vector<AtomString>& supportedRobustness() const { return m_supportedRobustness; }
    void setSupportedRobustness(Vector<String>&&);

    MediaKeysRequirement distinctiveIdentifiersRequirement() const { return m_distinctiveIdentifiersRequirement; }
    void setDistinctiveIdentifiersRequirement(MediaKeysRequirement requirement) { m_distinctiveIdentifiersRequirement = requirement; }

    MediaKeysRequirement persistentStateRequirement() const { return m_persistentStateRequirement; }
    void setPersistentStateRequirement(MediaKeysRequirement requirement) { m_persistentStateRequirement = requirement; }

    bool canCreateInstances() const { return m_canCreateInstances; }
    void setCanCreateInstances(bool flag) { m_canCreateInstances = flag; }

    bool supportsServerCertificates() const { return m_supportsServerCertificates; }
    void setSupportsServerCertificates(bool flag) { m_supportsServerCertificates = flag; }

    bool supportsSessions() const { return m_supportsSessions; }
    void setSupportsSessions(bool flag) { m_supportsSessions = flag; }

    const Vector<MediaKeyEncryptionScheme>& supportedEncryptionSchemes() const { return m_supportedEncryptionSchemes; }
    void setSupportedEncryptionSchemes(Vector<MediaKeyEncryptionScheme>&& schemes) { m_supportedEncryptionSchemes = WTFMove(schemes); }

    void unregister();

    bool hasSessionWithID(const String& id) { return m_sessions.contains(id); }
    void removeSessionWithID(const String& id) { m_sessions.remove(id); }
    void addKeysToSessionWithID(const String& id, Vector<Ref<FragmentedSharedBuffer>>&&);
    const Vector<Ref<FragmentedSharedBuffer>>* keysForSessionWithID(const String& id) const;
    Vector<Ref<FragmentedSharedBuffer>> removeKeysFromSessionWithID(const String& id);

private:
    MockCDMFactory();
    std::unique_ptr<CDMPrivate> createCDM(const String&) final;
    bool supportsKeySystem(const String&) final;

    MediaKeysRequirement m_distinctiveIdentifiersRequirement { MediaKeysRequirement::Optional };
    MediaKeysRequirement m_persistentStateRequirement { MediaKeysRequirement::Optional };
    Vector<AtomString> m_supportedDataTypes;
    Vector<MediaKeySessionType> m_supportedSessionTypes;
    Vector<AtomString> m_supportedRobustness;
    Vector<MediaKeyEncryptionScheme> m_supportedEncryptionSchemes;
    bool m_registered { true };
    bool m_canCreateInstances { true };
    bool m_supportsServerCertificates { true };
    bool m_supportsSessions { true };
    HashMap<String, Vector<Ref<FragmentedSharedBuffer>>> m_sessions;
};

class MockCDM : public CDMPrivate {
    WTF_MAKE_FAST_ALLOCATED;
public:
    MockCDM(WeakPtr<MockCDMFactory>);

    MockCDMFactory* factory() { return m_factory.get(); }

private:
    friend class MockCDMInstance;

    Vector<AtomString> supportedInitDataTypes() const final;
    Vector<AtomString> supportedRobustnesses() const final;
    bool supportsConfiguration(const MediaKeySystemConfiguration&) const final;
    bool supportsConfigurationWithRestrictions(const MediaKeySystemConfiguration&, const MediaKeysRestrictions&) const final;
    bool supportsSessionTypeWithConfiguration(const MediaKeySessionType&, const MediaKeySystemConfiguration&) const final;
    MediaKeysRequirement distinctiveIdentifiersRequirement(const MediaKeySystemConfiguration&, const MediaKeysRestrictions&) const final;
    MediaKeysRequirement persistentStateRequirement(const MediaKeySystemConfiguration&, const MediaKeysRestrictions&) const final;
    bool distinctiveIdentifiersAreUniquePerOriginAndClearable(const MediaKeySystemConfiguration&) const final;
    RefPtr<CDMInstance> createInstance() final;
    void loadAndInitialize() final;
    bool supportsServerCertificates() const final;
    bool supportsSessions() const final;
    bool supportsInitData(const AtomString&, const FragmentedSharedBuffer&) const final;
    RefPtr<FragmentedSharedBuffer> sanitizeResponse(const FragmentedSharedBuffer&) const final;
    std::optional<String> sanitizeSessionId(const String&) const final;

    WeakPtr<MockCDMFactory> m_factory;
};

class MockCDMInstance : public CDMInstance, public CanMakeWeakPtr<MockCDMInstance> {
public:
    MockCDMInstance(WeakPtr<MockCDM>);

    MockCDMFactory* factory() const { return m_cdm ? m_cdm->factory() : nullptr; }
    bool distinctiveIdentifiersAllowed() const { return m_distinctiveIdentifiersAllowed; }
    bool persistentStateAllowed() const { return m_persistentStateAllowed; }

private:
    ImplementationType implementationType() const final { return ImplementationType::Mock; }
    void initializeWithConfiguration(const MediaKeySystemConfiguration&, AllowDistinctiveIdentifiers, AllowPersistentState, SuccessCallback&&) final;
    void setServerCertificate(Ref<FragmentedSharedBuffer>&&, SuccessCallback&&) final;
    void setStorageDirectory(const String&) final;
    const String& keySystem() const final;
    RefPtr<CDMInstanceSession> createSession() final;

    WeakPtr<MockCDM> m_cdm;
    bool m_distinctiveIdentifiersAllowed { true };
    bool m_persistentStateAllowed { true };
};

class MockCDMInstanceSession : public CDMInstanceSession {
public:
    MockCDMInstanceSession(WeakPtr<MockCDMInstance>&&);

private:
    void requestLicense(LicenseType, const AtomString& initDataType, Ref<FragmentedSharedBuffer>&& initData, LicenseCallback&&) final;
    void updateLicense(const String&, LicenseType, Ref<FragmentedSharedBuffer>&&, LicenseUpdateCallback&&) final;
    void loadSession(LicenseType, const String&, const String&, LoadSessionCallback&&) final;
    void closeSession(const String&, CloseSessionCallback&&) final;
    void removeSessionData(const String&, LicenseType, RemoveSessionDataCallback&&) final;
    void storeRecordOfKeyUsage(const String&) final;

    WeakPtr<MockCDMInstance> m_instance;
};

}

#endif