/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */

/* vim: set ts=8 sts=2 et sw=2 tw=80: */

/* This Source Code Form is subject to the terms of the Mozilla Public

 * License, v. 2.0. If a copy of the MPL was not distributed with this

 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef mozilla_dom_presentation_provider_MulticastDNSDeviceProvider_h

#define mozilla_dom_presentation_provider_MulticastDNSDeviceProvider_h

#include "mozilla/RefPtr.h"

#include "nsCOMPtr.h"

#include "nsICancelable.h"

#include "nsIDNSServiceDiscovery.h"

#include "nsIObserver.h"

#include "nsIPresentationDevice.h"

#include "nsIPresentationDeviceProvider.h"

#include "nsIPresentationControlService.h"

#include "nsITimer.h"

#include "nsString.h"

#include "nsTArray.h"

#include "nsWeakPtr.h"

class nsITCPDeviceInfo;

namespace mozilla {

namespace dom {

namespace presentation {

class DNSServiceWrappedListener;

class MulticastDNSService;

class MulticastDNSDeviceProvider final

  : public nsIPresentationDeviceProvider

  , public nsIDNSServiceDiscoveryListener

  , public nsIDNSRegistrationListener

  , public nsIDNSServiceResolveListener

  , public nsIPresentationControlServerListener

  , public nsIObserver

{

public:

  NS_DECL_ISUPPORTS

  NS_DECL_NSIPRESENTATIONDEVICEPROVIDER

  NS_DECL_NSIDNSSERVICEDISCOVERYLISTENER

  NS_DECL_NSIDNSREGISTRATIONLISTENER

  NS_DECL_NSIDNSSERVICERESOLVELISTENER

  NS_DECL_NSIPRESENTATIONCONTROLSERVERLISTENER

  NS_DECL_NSIOBSERVER

  explicit MulticastDNSDeviceProvider() = default;

  nsresult Init();

  nsresult Uninit();

private:

  enum class DeviceState : uint32_t {

    eUnknown,

    eActive

  };

  class Device final : public nsIPresentationDevice

  {

  public:

    NS_DECL_ISUPPORTS

    NS_DECL_NSIPRESENTATIONDEVICE

    explicit Device(const nsACString& aId,

                    const nsACString& aName,

                    const nsACString& aType,

                    const nsACString& aAddress,

                    const uint16_t aPort,

                    const nsACString& aCertFingerprint,

                    DeviceState aState,

                    MulticastDNSDeviceProvider* aProvider)

      : mId(aId)

      , mName(aName)

      , mType(aType)

      , mAddress(aAddress)

      , mPort(aPort)

      , mCertFingerprint(aCertFingerprint)

      , mState(aState)

      , mProvider(aProvider)

    {

    }

    const nsCString& Id() const

    {

      return mId;

    }

    const nsCString& Address() const

    {

      return mAddress;

    }

    uint16_t Port() const

    {

      return mPort;

    }

    const nsCString& CertFingerprint() const

    {

      return mCertFingerprint;

    }

    DeviceState State() const

    {

      return mState;

    }

    void ChangeState(DeviceState aState)

    {

      mState = aState;

    }

    void Update(const nsACString& aName,

                const nsACString& aType,

                const nsACString& aAddress,

                const uint16_t aPort,

                const nsACString& aCertFingerprint)

    {

      mName = aName;

      mType = aType;

      mAddress = aAddress;

      mPort = aPort;

      mCertFingerprint = aCertFingerprint;

    }

  private:

    virtual ~Device() = default;

    nsCString mId;

    nsCString mName;

    nsCString mType;

    nsCString mAddress;

    uint16_t mPort;

    nsCString mCertFingerprint;

    DeviceState mState;

    MulticastDNSDeviceProvider* mProvider;

  };

  struct DeviceIdComparator {

    bool Equals(const RefPtr<Device>& aA, const RefPtr<Device>& aB) const {

      return aA->Id() == aB->Id();

    }

  };

  struct DeviceAddressComparator {

    bool Equals(const RefPtr<Device>& aA, const RefPtr<Device>& aB) const {

      return aA->Address() == aB->Address();

    }

  };

  virtual ~MulticastDNSDeviceProvider();

  nsresult StartServer();

  nsresult StopServer();

  void AbortServerRetry();

  nsresult RegisterMDNSService();

  nsresult UnregisterMDNSService(nsresult aReason);

  nsresult StopDiscovery(nsresult aReason);

  nsresult Connect(Device* aDevice,

                   nsIPresentationControlChannel** aRetVal);

  bool IsCompatibleServer(nsIDNSServiceInfo* aServiceInfo);

  // device manipulation

  nsresult AddDevice(const nsACString& aId,

                     const nsACString& aServiceName,

                     const nsACString& aServiceType,

                     const nsACString& aAddress,

                     const uint16_t aPort,

                     const nsACString& aCertFingerprint);

  nsresult UpdateDevice(const uint32_t aIndex,

                        const nsACString& aServiceName,

                        const nsACString& aServiceType,

                        const nsACString& aAddress,

                        const uint16_t aPort,

                        const nsACString& aCertFingerprint);

  nsresult RemoveDevice(const uint32_t aIndex);

  bool FindDeviceById(const nsACString& aId,

                      uint32_t& aIndex);

  bool FindDeviceByAddress(const nsACString& aAddress,

                           uint32_t& aIndex);

  already_AddRefed<Device>

  GetOrCreateDevice(nsITCPDeviceInfo* aDeviceInfo);

  void MarkAllDevicesUnknown();

  void ClearUnknownDevices();

  void ClearDevices();

  // preferences

  nsresult OnDiscoveryChanged(bool aEnabled);

  nsresult OnDiscoveryTimeoutChanged(uint32_t aTimeoutMs);

  nsresult OnDiscoverableChanged(bool aEnabled);

  nsresult OnServiceNameChanged(const nsACString& aServiceName);

  bool mInitialized = false;

  nsWeakPtr mDeviceListener;

  nsCOMPtr<nsIPresentationControlService> mPresentationService;

  nsCOMPtr<nsIDNSServiceDiscovery> mMulticastDNS;

  RefPtr<DNSServiceWrappedListener> mWrappedListener;

  nsCOMPtr<nsICancelable> mDiscoveryRequest;

  nsCOMPtr<nsICancelable> mRegisterRequest;

  nsTArray<RefPtr<Device>> mDevices;

  bool mDiscoveryEnabled = false;

  bool mIsDiscovering = false;

  uint32_t mDiscoveryTimeoutMs;

  nsCOMPtr<nsITimer> mDiscoveryTimer;

  bool mDiscoverable = false;

  bool mDiscoverableEncrypted = false;

  bool mIsServerRetrying = false;

  uint32_t mServerRetryMs;

  nsCOMPtr<nsITimer> mServerRetryTimer;

  nsCString mServiceName;

  nsCString mRegisteredName;

};

} // namespace presentation

} // namespace dom

} // namespace mozilla

#endif // mozilla_dom_presentation_provider_MulticastDNSDeviceProvider_h