/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
/* vim: set ts=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_bluetooth_bluetootheventservice_h__
#define mozilla_dom_bluetooth_bluetootheventservice_h__

#include "BluetoothCommon.h"
#include "BluetoothProfileManagerBase.h"
#include "mozilla/dom/ipc/Blob.h"
#include "nsAutoPtr.h"
#include "nsClassHashtable.h"
#include "nsIObserver.h"
#include "nsIThread.h"
#include "nsTObserverArray.h"

namespace mozilla {
namespace ipc {
class UnixSocketConsumer;
}
}

BEGIN_BLUETOOTH_NAMESPACE

class BluetoothManager;
class BluetoothNamedValue;
class BluetoothReplyRunnable;
class BluetoothSignal;

typedef mozilla::ObserverList<BluetoothSignal> BluetoothSignalObserverList;

class BluetoothService : public nsIObserver
                       , public BluetoothSignalObserver
{
  class ToggleBtAck;
  friend class ToggleBtAck;

  class ToggleBtTask;
  friend class ToggleBtTask;

  class StartupTask;
  friend class StartupTask;

public:
  NS_DECL_ISUPPORTS
  NS_DECL_NSIOBSERVER

  /**
   * Add a message handler object from message distribution observer.
   * Must be called from the main thread.
   *
   * @param aNodeName Node name of the object
   * @param aMsgHandler Weak pointer to the object
   */
  virtual void
  RegisterBluetoothSignalHandler(const nsAString& aNodeName,
                                 BluetoothSignalObserver* aMsgHandler);

  /**
   * Remove a message handler object from message distribution observer.
   * Must be called from the main thread.
   *
   * @param aNodeName Node name of the object
   * @param aMsgHandler Weak pointer to the object
   */
  virtual void
  UnregisterBluetoothSignalHandler(const nsAString& aNodeName,
                                   BluetoothSignalObserver* aMsgHandler);

  /**
   * Remove a message handlers for the given observer.
   * Must be called from the main thread.
   *
   * @param aMsgHandler Weak pointer to the object
   */
  void
  UnregisterAllSignalHandlers(BluetoothSignalObserver* aMsgHandler);

  /**
   * Distribute a signal to the observer list
   *
   * @param aSignal Signal object to distribute
   *
   * @return NS_OK if signal distributed, NS_ERROR_FAILURE on error
   */
  void
  DistributeSignal(const BluetoothSignal& aEvent);

  /**
   * Called when get a Bluetooth Signal from BluetoothDBusService
   *
   */
  void
  Notify(const BluetoothSignal& aParam);

  /**
   * Returns the BluetoothService singleton. Only to be called from main thread.
   *
   * @param aService Pointer to return singleton into.
   *
   * @return NS_OK on proper assignment, NS_ERROR_FAILURE otherwise (if service
   * has not yet been started, for instance)
   */
  static BluetoothService*
  Get();

  static already_AddRefed<BluetoothService>
  FactoryCreate()
  {
    nsRefPtr<BluetoothService> service = Get();
    return service.forget();
  }

  /**
   * Returns the path of the default adapter, implemented via a platform
   * specific method.
   *
   * @return NS_OK on success, NS_ERROR_FAILURE otherwise
   */
  virtual nsresult
  GetDefaultAdapterPathInternal(BluetoothReplyRunnable* aRunnable) = 0;

  /**
   * Returns the properties of paired devices, implemented via a platform
   * specific method.
   *
   * @return NS_OK on success, NS_ERROR_FAILURE otherwise
   */
  virtual nsresult
  GetPairedDevicePropertiesInternal(const nsTArray<nsString>& aDeviceAddresses,
                                    BluetoothReplyRunnable* aRunnable) = 0;

  /**
   * Returns the properties of connected devices regarding to specific profile,
   * implemented via a platform specific methood.
   *
   * @return NS_OK on success, NS_ERROR_FAILURE otherwise
   */
  virtual nsresult
  GetConnectedDevicePropertiesInternal(uint16_t aServiceUuid,
                                       BluetoothReplyRunnable* aRunnable) = 0;

  /**
   * Stop device discovery (platform specific implementation)
   *
   * @return NS_OK if discovery stopped correctly, false otherwise
   */
  virtual nsresult
  StopDiscoveryInternal(BluetoothReplyRunnable* aRunnable) = 0;

  /**
   * Start device discovery (platform specific implementation)
   *
   * @return NS_OK if discovery stopped correctly, false otherwise
   */
  virtual nsresult
  StartDiscoveryInternal(BluetoothReplyRunnable* aRunnable) = 0;

  /**
   * Set a property for the specified object
   *
   * @param aPropName Name of the property
   * @param aValue Boolean value
   * @param aRunnable Runnable to run on async reply
   *
   * @return NS_OK if property is set correctly, NS_ERROR_FAILURE otherwise
   */
  virtual nsresult
  SetProperty(BluetoothObjectType aType,
              const BluetoothNamedValue& aValue,
              BluetoothReplyRunnable* aRunnable) = 0;

  virtual nsresult
  CreatePairedDeviceInternal(const nsAString& aAddress,
                             int aTimeout,
                             BluetoothReplyRunnable* aRunnable) = 0;

  virtual nsresult
  RemoveDeviceInternal(const nsAString& aObjectPath,
                       BluetoothReplyRunnable* aRunnable) = 0;

  /**
   * Get corresponding service channel of specific service on remote device.
   * It's usually the very first step of establishing an outbound connection.
   *
   * @param aObjectPath Object path of remote device
   * @param aServiceUuid UUID of the target service
   * @param aManager Instance which has callback function OnGetServiceChannel()
   *
   * @return NS_OK if the task begins, NS_ERROR_FAILURE otherwise
   */
  virtual nsresult
  GetServiceChannel(const nsAString& aDeviceAddress,
                    const nsAString& aServiceUuid,
                    BluetoothProfileManagerBase* aManager) = 0;

  virtual bool
  UpdateSdpRecords(const nsAString& aDeviceAddress,
                   BluetoothProfileManagerBase* aManager) = 0;

  virtual bool
  SetPinCodeInternal(const nsAString& aDeviceAddress, const nsAString& aPinCode,
                     BluetoothReplyRunnable* aRunnable) = 0;

  virtual bool
  SetPasskeyInternal(const nsAString& aDeviceAddress, uint32_t aPasskey,
                     BluetoothReplyRunnable* aRunnable) = 0;

  virtual bool
  SetPairingConfirmationInternal(const nsAString& aDeviceAddress, bool aConfirm,
                                 BluetoothReplyRunnable* aRunnable) = 0;

  virtual void
  Connect(const nsAString& aDeviceAddress, uint32_t aCod, uint16_t aServiceUuid,
          BluetoothReplyRunnable* aRunnable) = 0;

  virtual void
  Disconnect(const nsAString& aDeviceAddress, uint16_t aServiceUuid,
             BluetoothReplyRunnable* aRunnable) = 0;

  virtual bool
  IsConnected(uint16_t aServiceUuid) = 0;

  virtual void
  SendFile(const nsAString& aDeviceAddress,
           BlobParent* aBlobParent,
           BlobChild* aBlobChild,
           BluetoothReplyRunnable* aRunnable) = 0;

  virtual void
  StopSendingFile(const nsAString& aDeviceAddress,
                  BluetoothReplyRunnable* aRunnable) = 0;

  virtual void
  ConfirmReceivingFile(const nsAString& aDeviceAddress, bool aConfirm,
                       BluetoothReplyRunnable* aRunnable) = 0;

  virtual void
  ConnectSco(BluetoothReplyRunnable* aRunnable) = 0;

  virtual void
  DisconnectSco(BluetoothReplyRunnable* aRunnable) = 0;

  virtual void
  IsScoConnected(BluetoothReplyRunnable* aRunnable) = 0;

#ifdef MOZ_B2G_RIL
  virtual void
  AnswerWaitingCall(BluetoothReplyRunnable* aRunnable) = 0;

  virtual void
  IgnoreWaitingCall(BluetoothReplyRunnable* aRunnable) = 0;

  virtual void
  ToggleCalls(BluetoothReplyRunnable* aRunnable) = 0;
#endif

  virtual void
  SendMetaData(const nsAString& aTitle,
               const nsAString& aArtist,
               const nsAString& aAlbum,
               int64_t aMediaNumber,
               int64_t aTotalMediaCount,
               int64_t aDuration,
               BluetoothReplyRunnable* aRunnable) = 0;

  virtual void
  SendPlayStatus(int64_t aDuration,
                 int64_t aPosition,
                 const nsAString& aPlayStatus,
                 BluetoothReplyRunnable* aRunnable) = 0;

  virtual void
  UpdatePlayStatus(uint32_t aDuration,
                   uint32_t aPosition,
                   ControlPlayStatus aPlayStatus) = 0;

  virtual nsresult
  SendSinkMessage(const nsAString& aDeviceAddresses,
                  const nsAString& aMessage) = 0;

  virtual nsresult
  SendInputMessage(const nsAString& aDeviceAddresses,
                   const nsAString& aMessage) = 0;

  bool
  IsEnabled() const
  {
    return mEnabled;
  }

  bool
  IsToggling() const;

  void
  RemoveObserverFromTable(const nsAString& key);

  /**
   * Below 2 function/variable are used for ensuring event 'AdapterAdded' will
   * be fired after event 'Enabled'.
   */
  void TryFiringAdapterAdded();
  void AdapterAddedReceived();

protected:
  BluetoothService() : mEnabled(false)
                     , mAdapterAddedReceived(false)
  {
  }

  virtual ~BluetoothService();

  bool
  Init();

  void
  Cleanup();

  nsresult
  StartStopBluetooth(bool aStart, bool aIsStartup);

  /**
   * Platform specific startup functions go here. Usually deals with member
   * variables, so not static. Guaranteed to be called outside of main thread.
   *
   * @return NS_OK on correct startup, NS_ERROR_FAILURE otherwise
   */
  virtual nsresult
  StartInternal() = 0;

  /**
   * Platform specific startup functions go here. Usually deals with member
   * variables, so not static. Guaranteed to be called outside of main thread.
   *
   * @return NS_OK on correct startup, NS_ERROR_FAILURE otherwise
   */
  virtual nsresult
  StopInternal() = 0;

  /**
   * Platform specific startup functions go here. Usually deals with member
   * variables, so not static. Guaranteed to be called outside of main thread.
   *
   * @return true if Bluetooth is enabled, false otherwise
   */
  virtual bool
  IsEnabledInternal() = 0;

  /**
   * Called when XPCOM first creates this service.
   */
  virtual nsresult
  HandleStartup();

  /**
   * Called when the startup settings check has completed.
   */
  nsresult
  HandleStartupSettingsCheck(bool aEnable);

  /**
   * Called when "mozsettings-changed" observer topic fires.
   */
  nsresult
  HandleSettingsChanged(const nsAString& aData);

  /**
   * Called when XPCOM is shutting down.
   */
  virtual nsresult
  HandleShutdown();

  // Called by ToggleBtAck.
  void
  SetEnabled(bool aEnabled);

  // Called by Get().
  static BluetoothService*
  Create();

  typedef nsClassHashtable<nsStringHashKey, BluetoothSignalObserverList >
  BluetoothSignalObserverTable;

  BluetoothSignalObserverTable mBluetoothSignalObserverTable;

  bool mEnabled;

private:
  /**
   * Due to the fact that the startup and shutdown of the Bluetooth system
   * can take an indefinite amount of time, a command thread is created
   * that can run blocking calls. The thread is not intended for regular
   * Bluetooth operations though.
   */
  nsCOMPtr<nsIThread> mBluetoothThread;

  bool mAdapterAddedReceived;
};

END_BLUETOOTH_NAMESPACE

#endif