/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.android.phone;

import com.android.internal.telephony.Call;
import com.android.internal.telephony.CallManager;
import com.android.internal.telephony.CallerInfo;
import com.android.internal.telephony.CallerInfoAsyncQuery;
import com.android.internal.telephony.Connection;
import com.android.internal.telephony.Phone;
import com.android.internal.telephony.PhoneConstants;
import com.android.internal.telephony.PhoneBase;
import com.android.internal.telephony.TelephonyCapabilities;
import com.android.internal.telephony.cdma.CdmaInformationRecords.CdmaDisplayInfoRec;
import com.android.internal.telephony.cdma.CdmaInformationRecords.CdmaSignalInfoRec;
import com.android.internal.telephony.cdma.SignalToneUtil;

import android.app.ActivityManagerNative;
import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothHeadset;
import android.bluetooth.BluetoothProfile;
import android.content.Context;
import android.media.AudioAttributes;
import android.media.AudioManager;
import android.media.ToneGenerator;
import android.net.Uri;
import android.os.AsyncResult;
import android.os.Handler;
import android.os.Message;
import android.os.SystemProperties;
import android.os.SystemVibrator;
import android.os.Vibrator;
import android.provider.CallLog.Calls;
import android.provider.Settings;
import android.telephony.DisconnectCause;
import android.telephony.PhoneNumberUtils;
import android.telephony.PhoneStateListener;
import android.telephony.TelephonyManager;
import android.util.EventLog;
import android.util.Log;

/**
 * Phone app module that listens for phone state changes and various other
 * events from the telephony layer, and triggers any resulting UI behavior
 * (like starting the Incoming Call UI, playing in-call tones,
 * updating notifications, writing call log entries, etc.)
 */
public class CallNotifier extends Handler {
    private static final String LOG_TAG = "CallNotifier";
    private static final boolean DBG =
            (PhoneGlobals.DBG_LEVEL >= 1) && (SystemProperties.getInt("ro.debuggable", 0) == 1);
    private static final boolean VDBG = (PhoneGlobals.DBG_LEVEL >= 2);

    // Time to display the  DisplayInfo Record sent by CDMA network
    private static final int DISPLAYINFO_NOTIFICATION_TIME = 2000; // msec

    private static final AudioAttributes VIBRATION_ATTRIBUTES = new AudioAttributes.Builder()
            .setContentType(AudioAttributes.CONTENT_TYPE_SPEECH)
            .setUsage(AudioAttributes.USAGE_VOICE_COMMUNICATION)
            .build();

    /** The singleton instance. */
    private static CallNotifier sInstance;

    // values used to track the query state
    private static final int CALLERINFO_QUERY_READY = 0;
    private static final int CALLERINFO_QUERYING = -1;

    // the state of the CallerInfo Query.
    private int mCallerInfoQueryState;

    // object used to synchronize access to mCallerInfoQueryState
    private Object mCallerInfoQueryStateGuard = new Object();

    // Events generated internally:
    private static final int PHONE_MWI_CHANGED = 21;
    private static final int DISPLAYINFO_NOTIFICATION_DONE = 24;
    private static final int UPDATE_IN_CALL_NOTIFICATION = 27;


    private PhoneGlobals mApplication;
    private CallManager mCM;
    private BluetoothHeadset mBluetoothHeadset;
    private CallLogger mCallLogger;

    // ToneGenerator instance for playing SignalInfo tones
    private ToneGenerator mSignalInfoToneGenerator;

    // The tone volume relative to other sounds in the stream SignalInfo
    private static final int TONE_RELATIVE_VOLUME_SIGNALINFO = 80;

    private Call.State mPreviousCdmaCallState;
    private boolean mVoicePrivacyState = false;
    private boolean mIsCdmaRedialCall = false;

    // Cached AudioManager
    private AudioManager mAudioManager;

    private final BluetoothManager mBluetoothManager;

    /**
     * Initialize the singleton CallNotifier instance.
     * This is only done once, at startup, from PhoneApp.onCreate().
     */
    /* package */ static CallNotifier init(PhoneGlobals app, Phone phone,
            CallLogger callLogger, CallStateMonitor callStateMonitor,
            BluetoothManager bluetoothManager) {
        synchronized (CallNotifier.class) {
            if (sInstance == null) {
                sInstance = new CallNotifier(app, phone, callLogger, callStateMonitor,
                        bluetoothManager);
            } else {
                Log.wtf(LOG_TAG, "init() called multiple times!  sInstance = " + sInstance);
            }
            return sInstance;
        }
    }

    /** Private constructor; @see init() */
    private CallNotifier(PhoneGlobals app, Phone phone, CallLogger callLogger,
            CallStateMonitor callStateMonitor, BluetoothManager bluetoothManager) {
        mApplication = app;
        mCM = app.mCM;
        mCallLogger = callLogger;
        mBluetoothManager = bluetoothManager;

        mAudioManager = (AudioManager) mApplication.getSystemService(Context.AUDIO_SERVICE);

        callStateMonitor.addListener(this);

        BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();
        if (adapter != null) {
            adapter.getProfileProxy(mApplication.getApplicationContext(),
                                    mBluetoothProfileServiceListener,
                                    BluetoothProfile.HEADSET);
        }

        TelephonyManager telephonyManager = (TelephonyManager)app.getSystemService(
                Context.TELEPHONY_SERVICE);
        telephonyManager.listen(mPhoneStateListener,
                PhoneStateListener.LISTEN_MESSAGE_WAITING_INDICATOR
                | PhoneStateListener.LISTEN_CALL_FORWARDING_INDICATOR);
    }

    private void createSignalInfoToneGenerator() {
        // Instantiate the ToneGenerator for SignalInfo and CallWaiting
        // TODO: We probably don't need the mSignalInfoToneGenerator instance
        // around forever. Need to change it so as to create a ToneGenerator instance only
        // when a tone is being played and releases it after its done playing.
        if (mSignalInfoToneGenerator == null) {
            try {
                mSignalInfoToneGenerator = new ToneGenerator(AudioManager.STREAM_VOICE_CALL,
                        TONE_RELATIVE_VOLUME_SIGNALINFO);
                Log.d(LOG_TAG, "CallNotifier: mSignalInfoToneGenerator created when toneplay");
            } catch (RuntimeException e) {
                Log.w(LOG_TAG, "CallNotifier: Exception caught while creating " +
                        "mSignalInfoToneGenerator: " + e);
                mSignalInfoToneGenerator = null;
            }
        } else {
            Log.d(LOG_TAG, "mSignalInfoToneGenerator created already, hence skipping");
        }
    }

    @Override
    public void handleMessage(Message msg) {
        switch (msg.what) {
            case CallStateMonitor.PHONE_NEW_RINGING_CONNECTION:
                log("RINGING... (new)");
                onNewRingingConnection((AsyncResult) msg.obj);
                break;

            case CallStateMonitor.PHONE_STATE_CHANGED:
                onPhoneStateChanged((AsyncResult) msg.obj);
                break;

            case CallStateMonitor.PHONE_DISCONNECT:
                if (DBG) log("DISCONNECT");
                onDisconnect((AsyncResult) msg.obj);
                break;

            case CallStateMonitor.PHONE_UNKNOWN_CONNECTION_APPEARED:
                onUnknownConnectionAppeared((AsyncResult) msg.obj);
                break;

            case PHONE_MWI_CHANGED:
                onMwiChanged(mApplication.phone.getMessageWaitingIndicator());
                break;

            case CallStateMonitor.PHONE_STATE_DISPLAYINFO:
                if (DBG) log("Received PHONE_STATE_DISPLAYINFO event");
                onDisplayInfo((AsyncResult) msg.obj);
                break;

            case CallStateMonitor.PHONE_STATE_SIGNALINFO:
                if (DBG) log("Received PHONE_STATE_SIGNALINFO event");
                onSignalInfo((AsyncResult) msg.obj);
                break;

            case DISPLAYINFO_NOTIFICATION_DONE:
                if (DBG) log("Received Display Info notification done event ...");
                CdmaDisplayInfo.dismissDisplayInfoRecord();
                break;

            case CallStateMonitor.EVENT_OTA_PROVISION_CHANGE:
                if (DBG) log("EVENT_OTA_PROVISION_CHANGE...");
                mApplication.handleOtaspEvent(msg);
                break;

            case CallStateMonitor.PHONE_ENHANCED_VP_ON:
                if (DBG) log("PHONE_ENHANCED_VP_ON...");
                if (!mVoicePrivacyState) {
                    int toneToPlay = InCallTonePlayer.TONE_VOICE_PRIVACY;
                    new InCallTonePlayer(toneToPlay).start();
                    mVoicePrivacyState = true;
                }
                break;

            case CallStateMonitor.PHONE_ENHANCED_VP_OFF:
                if (DBG) log("PHONE_ENHANCED_VP_OFF...");
                if (mVoicePrivacyState) {
                    int toneToPlay = InCallTonePlayer.TONE_VOICE_PRIVACY;
                    new InCallTonePlayer(toneToPlay).start();
                    mVoicePrivacyState = false;
                }
                break;

            default:
                // super.handleMessage(msg);
        }
    }

    PhoneStateListener mPhoneStateListener = new PhoneStateListener() {
        @Override
        public void onMessageWaitingIndicatorChanged(boolean mwi) {
            onMwiChanged(mwi);
        }

        @Override
        public void onCallForwardingIndicatorChanged(boolean cfi) {
            onCfiChanged(cfi);
        }
    };

    /**
     * Handles a "new ringing connection" event from the telephony layer.
     */
    private void onNewRingingConnection(AsyncResult r) {
        Connection c = (Connection) r.result;
        log("onNewRingingConnection(): state = " + mCM.getState() + ", conn = { " + c + " }");
        Call ringing = c.getCall();
        Phone phone = ringing.getPhone();

        // Check for a few cases where we totally ignore incoming calls.
        if (ignoreAllIncomingCalls(phone)) {
            // Immediately reject the call, without even indicating to the user
            // that an incoming call occurred.  (This will generally send the
            // caller straight to voicemail, just as if we *had* shown the
            // incoming-call UI and the user had declined the call.)
            PhoneUtils.hangupRingingCall(ringing);
            return;
        }

        if (!c.isRinging()) {
            Log.i(LOG_TAG, "CallNotifier.onNewRingingConnection(): connection not ringing!");
            // This is a very strange case: an incoming call that stopped
            // ringing almost instantly after the onNewRingingConnection()
            // event.  There's nothing we can do here, so just bail out
            // without doing anything.  (But presumably we'll log it in
            // the call log when the disconnect event comes in...)
            return;
        }

        // Stop any signalInfo tone being played on receiving a Call
        stopSignalInfoTone();

        Call.State state = c.getState();
        // State will be either INCOMING or WAITING.
        if (VDBG) log("- connection is ringing!  state = " + state);
        // if (DBG) PhoneUtils.dumpCallState(mPhone);

        // No need to do any service state checks here (like for
        // "emergency mode"), since in those states the SIM won't let
        // us get incoming connections in the first place.

        // TODO: Consider sending out a serialized broadcast Intent here
        // (maybe "ACTION_NEW_INCOMING_CALL"), *before* starting the
        // ringer and going to the in-call UI.  The intent should contain
        // the caller-id info for the current connection, and say whether
        // it would be a "call waiting" call or a regular ringing call.
        // If anybody consumed the broadcast, we'd bail out without
        // ringing or bringing up the in-call UI.
        //
        // This would give 3rd party apps a chance to listen for (and
        // intercept) new ringing connections.  An app could reject the
        // incoming call by consuming the broadcast and doing nothing, or
        // it could "pick up" the call (without any action by the user!)
        // via some future TelephonyManager API.
        //
        // See bug 1312336 for more details.
        // We'd need to protect this with a new "intercept incoming calls"
        // system permission.

        // Obtain a partial wake lock to make sure the CPU doesn't go to
        // sleep before we finish bringing up the InCallScreen.
        // (This will be upgraded soon to a full wake lock; see
        // showIncomingCall().)
        if (VDBG) log("Holding wake lock on new incoming connection.");
        mApplication.requestWakeState(PhoneGlobals.WakeState.PARTIAL);

        // Note we *don't* post a status bar notification here, since
        // we're not necessarily ready to actually show the incoming call
        // to the user.  (For calls in the INCOMING state, at least, we
        // still need to run a caller-id query, and we may not even ring
        // at all if the "send directly to voicemail" flag is set.)
        //
        // Instead, we update the notification (and potentially launch the
        // InCallScreen) from the showIncomingCall() method, which runs
        // when the caller-id query completes or times out.

        if (VDBG) log("- onNewRingingConnection() done.");
    }

    /**
     * Determines whether or not we're allowed to present incoming calls to the
     * user, based on the capabilities and/or current state of the device.
     *
     * If this method returns true, that means we should immediately reject the
     * current incoming call, without even indicating to the user that an
     * incoming call occurred.
     *
     * (We only reject incoming calls in a few cases, like during an OTASP call
     * when we can't interrupt the user, or if the device hasn't completed the
     * SetupWizard yet.  We also don't allow incoming calls on non-voice-capable
     * devices.  But note that we *always* allow incoming calls while in ECM.)
     *
     * @return true if we're *not* allowed to present an incoming call to
     * the user.
     */
    private boolean ignoreAllIncomingCalls(Phone phone) {
        // Incoming calls are totally ignored on non-voice-capable devices.
        if (!PhoneGlobals.sVoiceCapable) {
            // ...but still log a warning, since we shouldn't have gotten this
            // event in the first place!  (Incoming calls *should* be blocked at
            // the telephony layer on non-voice-capable capable devices.)
            Log.w(LOG_TAG, "Got onNewRingingConnection() on non-voice-capable device! Ignoring...");
            return true;
        }

        // In ECM (emergency callback mode), we ALWAYS allow incoming calls
        // to get through to the user.  (Note that ECM is applicable only to
        // voice-capable CDMA devices).
        if (PhoneUtils.isPhoneInEcm(phone)) {
            if (DBG) log("Incoming call while in ECM: always allow...");
            return false;
        }

        // Incoming calls are totally ignored if the device isn't provisioned yet.
        boolean provisioned = Settings.Global.getInt(mApplication.getContentResolver(),
            Settings.Global.DEVICE_PROVISIONED, 0) != 0;
        if (!provisioned) {
            Log.i(LOG_TAG, "Ignoring incoming call: not provisioned");
            return true;
        }

        // Incoming calls are totally ignored if an OTASP call is active.
        if (TelephonyCapabilities.supportsOtasp(phone)) {
            boolean activateState = (mApplication.cdmaOtaScreenState.otaScreenState
                    == OtaUtils.CdmaOtaScreenState.OtaScreenState.OTA_STATUS_ACTIVATION);
            boolean dialogState = (mApplication.cdmaOtaScreenState.otaScreenState
                    == OtaUtils.CdmaOtaScreenState.OtaScreenState.OTA_STATUS_SUCCESS_FAILURE_DLG);
            boolean spcState = mApplication.cdmaOtaProvisionData.inOtaSpcState;

            if (spcState) {
                Log.i(LOG_TAG, "Ignoring incoming call: OTA call is active");
                return true;
            } else if (activateState || dialogState) {
                // We *are* allowed to receive incoming calls at this point.
                // But clear out any residual OTASP UI first.
                // TODO: It's an MVC violation to twiddle the OTA UI state here;
                // we should instead provide a higher-level API via OtaUtils.
                if (dialogState) mApplication.dismissOtaDialogs();
                mApplication.clearOtaState();
                return false;
            }
        }

        // Normal case: allow this call to be presented to the user.
        return false;
    }

    private void onUnknownConnectionAppeared(AsyncResult r) {
        PhoneConstants.State state = mCM.getState();

        if (state == PhoneConstants.State.OFFHOOK) {
            if (DBG) log("unknown connection appeared...");

            onPhoneStateChanged(r);
        }
    }

    /**
     * Updates the phone UI in response to phone state changes.
     *
     * Watch out: certain state changes are actually handled by their own
     * specific methods:
     *   - see onNewRingingConnection() for new incoming calls
     *   - see onDisconnect() for calls being hung up or disconnected
     */
    private void onPhoneStateChanged(AsyncResult r) {
        PhoneConstants.State state = mCM.getState();
        if (VDBG) log("onPhoneStateChanged: state = " + state);

        // Turn status bar notifications on or off depending upon the state
        // of the phone.  Notification Alerts (audible or vibrating) should
        // be on if and only if the phone is IDLE.
        mApplication.notificationMgr.statusBarHelper
                .enableNotificationAlerts(state == PhoneConstants.State.IDLE);

        Phone fgPhone = mCM.getFgPhone();
        if (fgPhone.getPhoneType() == PhoneConstants.PHONE_TYPE_CDMA) {
            if ((fgPhone.getForegroundCall().getState() == Call.State.ACTIVE)
                    && ((mPreviousCdmaCallState == Call.State.DIALING)
                    ||  (mPreviousCdmaCallState == Call.State.ALERTING))) {
                if (mIsCdmaRedialCall) {
                    int toneToPlay = InCallTonePlayer.TONE_REDIAL;
                    new InCallTonePlayer(toneToPlay).start();
                }
                // Stop any signal info tone when call moves to ACTIVE state
                stopSignalInfoTone();
            }
            mPreviousCdmaCallState = fgPhone.getForegroundCall().getState();
        }

        // Have the PhoneApp recompute its mShowBluetoothIndication
        // flag based on the (new) telephony state.
        // There's no need to force a UI update since we update the
        // in-call notification ourselves (below), and the InCallScreen
        // listens for phone state changes itself.
        mBluetoothManager.updateBluetoothIndication();

        // Update the phone state and other sensor/lock.
        mApplication.updatePhoneState(state);

        if (state == PhoneConstants.State.OFFHOOK) {

            if (VDBG) log("onPhoneStateChanged: OFF HOOK");
            // make sure audio is in in-call mode now
            PhoneUtils.setAudioMode(mCM);
        }
    }

    void updateCallNotifierRegistrationsAfterRadioTechnologyChange() {
        if (DBG) Log.d(LOG_TAG, "updateCallNotifierRegistrationsAfterRadioTechnologyChange...");

        // Instantiate mSignalInfoToneGenerator
        createSignalInfoToneGenerator();
    }

    private void onDisconnect(AsyncResult r) {
        if (VDBG) log("onDisconnect()...  CallManager state: " + mCM.getState());

        mVoicePrivacyState = false;
        Connection c = (Connection) r.result;
        if (c != null) {
            log("onDisconnect: cause = " + DisconnectCause.toString(c.getDisconnectCause())
                  + ", incoming = " + c.isIncoming()
                  + ", date = " + c.getCreateTime());
        } else {
            Log.w(LOG_TAG, "onDisconnect: null connection");
        }

        int autoretrySetting = 0;
        if ((c != null) && (c.getCall().getPhone().getPhoneType() == PhoneConstants.PHONE_TYPE_CDMA)) {
            autoretrySetting = android.provider.Settings.Global.getInt(mApplication.
                    getContentResolver(),android.provider.Settings.Global.CALL_AUTO_RETRY, 0);
        }

        // Stop any signalInfo tone being played when a call gets ended
        stopSignalInfoTone();

        if ((c != null) && (c.getCall().getPhone().getPhoneType() == PhoneConstants.PHONE_TYPE_CDMA)) {
            // Resetting the CdmaPhoneCallState members
            mApplication.cdmaPhoneCallState.resetCdmaPhoneCallState();
        }

        // If this is the end of an OTASP call, pass it on to the PhoneApp.
        if (c != null && TelephonyCapabilities.supportsOtasp(c.getCall().getPhone())) {
            final String number = c.getAddress();
            if (c.getCall().getPhone().isOtaSpNumber(number)) {
                if (DBG) log("onDisconnect: this was an OTASP call!");
                mApplication.handleOtaspDisconnect();
            }
        }

        // Check for the various tones we might need to play (thru the
        // earpiece) after a call disconnects.
        int toneToPlay = InCallTonePlayer.TONE_NONE;

        // If we don't need to play BUSY or CONGESTION, then play the
        // "call ended" tone if this was a "regular disconnect" (i.e. a
        // normal call where one end or the other hung up) *and* this
        // disconnect event caused the phone to become idle.  (In other
        // words, we *don't* play the sound if one call hangs up but
        // there's still an active call on the other line.)
        // TODO: We may eventually want to disable this via a preference.
        if ((toneToPlay == InCallTonePlayer.TONE_NONE)
            && (mCM.getState() == PhoneConstants.State.IDLE)
            && (c != null)) {
            int cause = c.getDisconnectCause();
            if ((cause == DisconnectCause.NORMAL)  // remote hangup
                || (cause == DisconnectCause.LOCAL)) {  // local hangup
                if (VDBG) log("- need to play CALL_ENDED tone!");
                toneToPlay = InCallTonePlayer.TONE_CALL_ENDED;
                mIsCdmaRedialCall = false;
            }
        }

        // All phone calls are disconnected.
        if (mCM.getState() == PhoneConstants.State.IDLE) {
            // Don't reset the audio mode or bluetooth/speakerphone state
            // if we still need to let the user hear a tone through the earpiece.
            if (toneToPlay == InCallTonePlayer.TONE_NONE) {
                resetAudioStateAfterDisconnect();
            }
        }

        if (c != null) {
            mCallLogger.logCall(c);

            final String number = c.getAddress();
            final Phone phone = c.getCall().getPhone();
            final boolean isEmergencyNumber =
                    PhoneNumberUtils.isLocalEmergencyNumber(mApplication, number);

            // Possibly play a "post-disconnect tone" thru the earpiece.
            // We do this here, rather than from the InCallScreen
            // activity, since we need to do this even if you're not in
            // the Phone UI at the moment the connection ends.
            if (toneToPlay != InCallTonePlayer.TONE_NONE) {
                if (VDBG) log("- starting post-disconnect tone (" + toneToPlay + ")...");
                new InCallTonePlayer(toneToPlay).start();

                // TODO: alternatively, we could start an InCallTonePlayer
                // here with an "unlimited" tone length,
                // and manually stop it later when this connection truly goes
                // away.  (The real connection over the network was closed as soon
                // as we got the BUSY message.  But our telephony layer keeps the
                // connection open for a few extra seconds so we can show the
                // "busy" indication to the user.  We could stop the busy tone
                // when *that* connection's "disconnect" event comes in.)
            }

            final int cause = c.getDisconnectCause();
            if (((mPreviousCdmaCallState == Call.State.DIALING)
                    || (mPreviousCdmaCallState == Call.State.ALERTING))
                    && (!isEmergencyNumber)
                    && (cause != DisconnectCause.INCOMING_MISSED )
                    && (cause != DisconnectCause.NORMAL)
                    && (cause != DisconnectCause.LOCAL)
                    && (cause != DisconnectCause.INCOMING_REJECTED)) {
                if (!mIsCdmaRedialCall) {
                    if (autoretrySetting == InCallScreen.AUTO_RETRY_ON) {
                        // TODO: (Moto): The contact reference data may need to be stored and use
                        // here when redialing a call. For now, pass in NULL as the URI parameter.
                        final int status =
                                PhoneUtils.placeCall(mApplication, phone, number, null, false);
                        if (status != PhoneUtils.CALL_STATUS_FAILED) {
                            mIsCdmaRedialCall = true;
                        }
                    } else {
                        mIsCdmaRedialCall = false;
                    }
                } else {
                    mIsCdmaRedialCall = false;
                }
            }
        }
    }

    /**
     * Resets the audio mode and speaker state when a call ends.
     */
    private void resetAudioStateAfterDisconnect() {
        if (VDBG) log("resetAudioStateAfterDisconnect()...");

        if (mBluetoothHeadset != null) {
            mBluetoothHeadset.disconnectAudio();
        }

        // call turnOnSpeaker() with state=false and store=true even if speaker
        // is already off to reset user requested speaker state.
        PhoneUtils.turnOnSpeaker(mApplication, false, true);

        PhoneUtils.setAudioMode(mCM);
    }

    private void onMwiChanged(boolean visible) {
        if (VDBG) log("onMwiChanged(): " + visible);

        // "Voicemail" is meaningless on non-voice-capable devices,
        // so ignore MWI events.
        if (!PhoneGlobals.sVoiceCapable) {
            // ...but still log a warning, since we shouldn't have gotten this
            // event in the first place!
            // (PhoneStateListener.LISTEN_MESSAGE_WAITING_INDICATOR events
            // *should* be blocked at the telephony layer on non-voice-capable
            // capable devices.)
            Log.w(LOG_TAG, "Got onMwiChanged() on non-voice-capable device! Ignoring...");
            return;
        }

        mApplication.notificationMgr.updateMwi(visible);
    }

    /**
     * Posts a delayed PHONE_MWI_CHANGED event, to schedule a "retry" for a
     * failed NotificationMgr.updateMwi() call.
     */
    /* package */ void sendMwiChangedDelayed(long delayMillis) {
        Message message = Message.obtain(this, PHONE_MWI_CHANGED);
        sendMessageDelayed(message, delayMillis);
    }

    private void onCfiChanged(boolean visible) {
        if (VDBG) log("onCfiChanged(): " + visible);
        mApplication.notificationMgr.updateCfi(visible);
    }

    /**
     * Helper class to play tones through the earpiece (or speaker / BT)
     * during a call, using the ToneGenerator.
     *
     * To use, just instantiate a new InCallTonePlayer
     * (passing in the TONE_* constant for the tone you want)
     * and start() it.
     *
     * When we're done playing the tone, if the phone is idle at that
     * point, we'll reset the audio routing and speaker state.
     * (That means that for tones that get played *after* a call
     * disconnects, like "busy" or "congestion" or "call ended", you
     * should NOT call resetAudioStateAfterDisconnect() yourself.
     * Instead, just start the InCallTonePlayer, which will automatically
     * defer the resetAudioStateAfterDisconnect() call until the tone
     * finishes playing.)
     */
    private class InCallTonePlayer extends Thread {
        private int mToneId;
        private int mState;
        // The possible tones we can play.
        public static final int TONE_NONE = 0;
        public static final int TONE_CALL_WAITING = 1;
        public static final int TONE_BUSY = 2;
        public static final int TONE_CONGESTION = 3;
        public static final int TONE_CALL_ENDED = 4;
        public static final int TONE_VOICE_PRIVACY = 5;
        public static final int TONE_REORDER = 6;
        public static final int TONE_INTERCEPT = 7;
        public static final int TONE_CDMA_DROP = 8;
        public static final int TONE_OUT_OF_SERVICE = 9;
        public static final int TONE_REDIAL = 10;
        public static final int TONE_OTA_CALL_END = 11;
        public static final int TONE_UNOBTAINABLE_NUMBER = 13;

        // The tone volume relative to other sounds in the stream
        static final int TONE_RELATIVE_VOLUME_EMERGENCY = 100;
        static final int TONE_RELATIVE_VOLUME_HIPRI = 80;
        static final int TONE_RELATIVE_VOLUME_LOPRI = 50;

        // Buffer time (in msec) to add on to tone timeout value.
        // Needed mainly when the timeout value for a tone is the
        // exact duration of the tone itself.
        static final int TONE_TIMEOUT_BUFFER = 20;

        // The tone state
        static final int TONE_OFF = 0;
        static final int TONE_ON = 1;
        static final int TONE_STOPPED = 2;

        InCallTonePlayer(int toneId) {
            super();
            mToneId = toneId;
            mState = TONE_OFF;
        }

        @Override
        public void run() {
            log("InCallTonePlayer.run(toneId = " + mToneId + ")...");

            int toneType = 0;  // passed to ToneGenerator.startTone()
            int toneVolume;  // passed to the ToneGenerator constructor
            int toneLengthMillis;
            int phoneType = mCM.getFgPhone().getPhoneType();

            switch (mToneId) {
                case TONE_CALL_WAITING:
                    toneType = ToneGenerator.TONE_SUP_CALL_WAITING;
                    toneVolume = TONE_RELATIVE_VOLUME_HIPRI;
                    // Call waiting tone is stopped by stopTone() method
                    toneLengthMillis = Integer.MAX_VALUE - TONE_TIMEOUT_BUFFER;
                    break;
                case TONE_BUSY:
                    if (phoneType == PhoneConstants.PHONE_TYPE_CDMA) {
                        toneType = ToneGenerator.TONE_CDMA_NETWORK_BUSY_ONE_SHOT;
                        toneVolume = TONE_RELATIVE_VOLUME_LOPRI;
                        toneLengthMillis = 1000;
                    } else if (phoneType == PhoneConstants.PHONE_TYPE_GSM
                            || phoneType == PhoneConstants.PHONE_TYPE_SIP
                            || phoneType == PhoneConstants.PHONE_TYPE_IMS
                            || phoneType == PhoneConstants.PHONE_TYPE_THIRD_PARTY) {
                        toneType = ToneGenerator.TONE_SUP_BUSY;
                        toneVolume = TONE_RELATIVE_VOLUME_HIPRI;
                        toneLengthMillis = 4000;
                    } else {
                        throw new IllegalStateException("Unexpected phone type: " + phoneType);
                    }
                    break;
                case TONE_CONGESTION:
                    toneType = ToneGenerator.TONE_SUP_CONGESTION;
                    toneVolume = TONE_RELATIVE_VOLUME_HIPRI;
                    toneLengthMillis = 4000;
                    break;

                case TONE_CALL_ENDED:
                    toneType = ToneGenerator.TONE_PROP_PROMPT;
                    toneVolume = TONE_RELATIVE_VOLUME_HIPRI;
                    toneLengthMillis = 200;
                    break;
                 case TONE_OTA_CALL_END:
                    if (mApplication.cdmaOtaConfigData.otaPlaySuccessFailureTone ==
                            OtaUtils.OTA_PLAY_SUCCESS_FAILURE_TONE_ON) {
                        toneType = ToneGenerator.TONE_CDMA_ALERT_CALL_GUARD;
                        toneVolume = TONE_RELATIVE_VOLUME_HIPRI;
                        toneLengthMillis = 750;
                    } else {
                        toneType = ToneGenerator.TONE_PROP_PROMPT;
                        toneVolume = TONE_RELATIVE_VOLUME_HIPRI;
                        toneLengthMillis = 200;
                    }
                    break;
                case TONE_VOICE_PRIVACY:
                    toneType = ToneGenerator.TONE_CDMA_ALERT_NETWORK_LITE;
                    toneVolume = TONE_RELATIVE_VOLUME_HIPRI;
                    toneLengthMillis = 5000;
                    break;
                case TONE_REORDER:
                    toneType = ToneGenerator.TONE_CDMA_REORDER;
                    toneVolume = TONE_RELATIVE_VOLUME_HIPRI;
                    toneLengthMillis = 4000;
                    break;
                case TONE_INTERCEPT:
                    toneType = ToneGenerator.TONE_CDMA_ABBR_INTERCEPT;
                    toneVolume = TONE_RELATIVE_VOLUME_LOPRI;
                    toneLengthMillis = 500;
                    break;
                case TONE_CDMA_DROP:
                case TONE_OUT_OF_SERVICE:
                    toneType = ToneGenerator.TONE_CDMA_CALLDROP_LITE;
                    toneVolume = TONE_RELATIVE_VOLUME_LOPRI;
                    toneLengthMillis = 375;
                    break;
                case TONE_REDIAL:
                    toneType = ToneGenerator.TONE_CDMA_ALERT_AUTOREDIAL_LITE;
                    toneVolume = TONE_RELATIVE_VOLUME_LOPRI;
                    toneLengthMillis = 5000;
                    break;
                case TONE_UNOBTAINABLE_NUMBER:
                    toneType = ToneGenerator.TONE_SUP_ERROR;
                    toneVolume = TONE_RELATIVE_VOLUME_HIPRI;
                    toneLengthMillis = 4000;
                    break;
                default:
                    throw new IllegalArgumentException("Bad toneId: " + mToneId);
            }

            // If the mToneGenerator creation fails, just continue without it.  It is
            // a local audio signal, and is not as important.
            ToneGenerator toneGenerator;
            try {
                int stream;
                if (mBluetoothHeadset != null) {
                    stream = mBluetoothHeadset.isAudioOn() ? AudioManager.STREAM_BLUETOOTH_SCO:
                        AudioManager.STREAM_VOICE_CALL;
                } else {
                    stream = AudioManager.STREAM_VOICE_CALL;
                }
                toneGenerator = new ToneGenerator(stream, toneVolume);
                // if (DBG) log("- created toneGenerator: " + toneGenerator);
            } catch (RuntimeException e) {
                Log.w(LOG_TAG,
                      "InCallTonePlayer: Exception caught while creating ToneGenerator: " + e);
                toneGenerator = null;
            }

            // Using the ToneGenerator (with the CALL_WAITING / BUSY /
            // CONGESTION tones at least), the ToneGenerator itself knows
            // the right pattern of tones to play; we do NOT need to
            // manually start/stop each individual tone, or manually
            // insert the correct delay between tones.  (We just start it
            // and let it run for however long we want the tone pattern to
            // continue.)
            //
            // TODO: When we stop the ToneGenerator in the middle of a
            // "tone pattern", it sounds bad if we cut if off while the
            // tone is actually playing.  Consider adding API to the
            // ToneGenerator to say "stop at the next silent part of the
            // pattern", or simply "play the pattern N times and then
            // stop."
            boolean needToStopTone = true;
            boolean okToPlayTone = false;

            if (toneGenerator != null) {
                int ringerMode = mAudioManager.getRingerMode();
                if (phoneType == PhoneConstants.PHONE_TYPE_CDMA) {
                    if (toneType == ToneGenerator.TONE_CDMA_ALERT_CALL_GUARD) {
                        if ((ringerMode != AudioManager.RINGER_MODE_SILENT) &&
                                (ringerMode != AudioManager.RINGER_MODE_VIBRATE)) {
                            if (DBG) log("- InCallTonePlayer: start playing call tone=" + toneType);
                            okToPlayTone = true;
                            needToStopTone = false;
                        }
                    } else if ((toneType == ToneGenerator.TONE_CDMA_NETWORK_BUSY_ONE_SHOT) ||
                            (toneType == ToneGenerator.TONE_CDMA_REORDER) ||
                            (toneType == ToneGenerator.TONE_CDMA_ABBR_REORDER) ||
                            (toneType == ToneGenerator.TONE_CDMA_ABBR_INTERCEPT) ||
                            (toneType == ToneGenerator.TONE_CDMA_CALLDROP_LITE)) {
                        if (ringerMode != AudioManager.RINGER_MODE_SILENT) {
                            if (DBG) log("InCallTonePlayer:playing call fail tone:" + toneType);
                            okToPlayTone = true;
                            needToStopTone = false;
                        }
                    } else if ((toneType == ToneGenerator.TONE_CDMA_ALERT_AUTOREDIAL_LITE) ||
                               (toneType == ToneGenerator.TONE_CDMA_ALERT_NETWORK_LITE)) {
                        if ((ringerMode != AudioManager.RINGER_MODE_SILENT) &&
                                (ringerMode != AudioManager.RINGER_MODE_VIBRATE)) {
                            if (DBG) log("InCallTonePlayer:playing tone for toneType=" + toneType);
                            okToPlayTone = true;
                            needToStopTone = false;
                        }
                    } else { // For the rest of the tones, always OK to play.
                        okToPlayTone = true;
                    }
                } else {  // Not "CDMA"
                    okToPlayTone = true;
                }

                synchronized (this) {
                    if (okToPlayTone && mState != TONE_STOPPED) {
                        mState = TONE_ON;
                        toneGenerator.startTone(toneType);
                        try {
                            wait(toneLengthMillis + TONE_TIMEOUT_BUFFER);
                        } catch  (InterruptedException e) {
                            Log.w(LOG_TAG,
                                  "InCallTonePlayer stopped: " + e);
                        }
                        if (needToStopTone) {
                            toneGenerator.stopTone();
                        }
                    }
                    // if (DBG) log("- InCallTonePlayer: done playing.");
                    toneGenerator.release();
                    mState = TONE_OFF;
                }
            }

            // Finally, do the same cleanup we otherwise would have done
            // in onDisconnect().
            //
            // (But watch out: do NOT do this if the phone is in use,
            // since some of our tones get played *during* a call (like
            // CALL_WAITING) and we definitely *don't*
            // want to reset the audio mode / speaker / bluetooth after
            // playing those!
            // This call is really here for use with tones that get played
            // *after* a call disconnects, like "busy" or "congestion" or
            // "call ended", where the phone has already become idle but
            // we need to defer the resetAudioStateAfterDisconnect() call
            // till the tone finishes playing.)
            if (mCM.getState() == PhoneConstants.State.IDLE) {
                resetAudioStateAfterDisconnect();
            }
        }

        public void stopTone() {
            synchronized (this) {
                if (mState == TONE_ON) {
                    notify();
                }
                mState = TONE_STOPPED;
            }
        }
    }

    /**
     * Displays a notification when the phone receives a DisplayInfo record.
     */
    private void onDisplayInfo(AsyncResult r) {
        // Extract the DisplayInfo String from the message
        CdmaDisplayInfoRec displayInfoRec = (CdmaDisplayInfoRec)(r.result);

        if (displayInfoRec != null) {
            String displayInfo = displayInfoRec.alpha;
            if (DBG) log("onDisplayInfo: displayInfo=" + displayInfo);
            CdmaDisplayInfo.displayInfoRecord(mApplication, displayInfo);

            // start a 2 second timer
            sendEmptyMessageDelayed(DISPLAYINFO_NOTIFICATION_DONE,
                    DISPLAYINFO_NOTIFICATION_TIME);
        }
    }

    /**
     * Helper class to play SignalInfo tones using the ToneGenerator.
     *
     * To use, just instantiate a new SignalInfoTonePlayer
     * (passing in the ToneID constant for the tone you want)
     * and start() it.
     */
    private class SignalInfoTonePlayer extends Thread {
        private int mToneId;

        SignalInfoTonePlayer(int toneId) {
            super();
            mToneId = toneId;
        }

        @Override
        public void run() {
            log("SignalInfoTonePlayer.run(toneId = " + mToneId + ")...");
            createSignalInfoToneGenerator();
            if (mSignalInfoToneGenerator != null) {
                //First stop any ongoing SignalInfo tone
                mSignalInfoToneGenerator.stopTone();

                //Start playing the new tone if its a valid tone
                mSignalInfoToneGenerator.startTone(mToneId);
            }
        }
    }

    /**
     * Plays a tone when the phone receives a SignalInfo record.
     */
    private void onSignalInfo(AsyncResult r) {
        // Signal Info are totally ignored on non-voice-capable devices.
        if (!PhoneGlobals.sVoiceCapable) {
            Log.w(LOG_TAG, "Got onSignalInfo() on non-voice-capable device! Ignoring...");
            return;
        }

        if (PhoneUtils.isRealIncomingCall(mCM.getFirstActiveRingingCall().getState())) {
            // Do not start any new SignalInfo tone when Call state is INCOMING
            // and stop any previous SignalInfo tone which is being played
            stopSignalInfoTone();
        } else {
            // Extract the SignalInfo String from the message
            CdmaSignalInfoRec signalInfoRec = (CdmaSignalInfoRec)(r.result);
            // Only proceed if a Signal info is present.
            if (signalInfoRec != null) {
                boolean isPresent = signalInfoRec.isPresent;
                if (DBG) log("onSignalInfo: isPresent=" + isPresent);
                if (isPresent) {// if tone is valid
                    int uSignalType = signalInfoRec.signalType;
                    int uAlertPitch = signalInfoRec.alertPitch;
                    int uSignal = signalInfoRec.signal;

                    if (DBG) log("onSignalInfo: uSignalType=" + uSignalType + ", uAlertPitch=" +
                            uAlertPitch + ", uSignal=" + uSignal);
                    //Map the Signal to a ToneGenerator ToneID only if Signal info is present
                    int toneID = SignalToneUtil.getAudioToneFromSignalInfo
                            (uSignalType, uAlertPitch, uSignal);

                    //Create the SignalInfo tone player and pass the ToneID
                    new SignalInfoTonePlayer(toneID).start();
                }
            }
        }
    }

    /**
     * Stops a SignalInfo tone in the following condition
     * 1 - On receiving a New Ringing Call
     * 2 - On disconnecting a call
     * 3 - On answering a Call Waiting Call
     */
    /* package */ void stopSignalInfoTone() {
        if (DBG) log("stopSignalInfoTone: Stopping SignalInfo tone player");
        new SignalInfoTonePlayer(ToneGenerator.TONE_CDMA_SIGNAL_OFF).start();
    }

    /**
     * Return the private variable mPreviousCdmaCallState.
     */
    /* package */ Call.State getPreviousCdmaCallState() {
        return mPreviousCdmaCallState;
    }

    /**
     * Return the private variable mVoicePrivacyState.
     */
    /* package */ boolean getVoicePrivacyState() {
        return mVoicePrivacyState;
    }

    /**
     * Return the private variable mIsCdmaRedialCall.
     */
    /* package */ boolean getIsCdmaRedialCall() {
        return mIsCdmaRedialCall;
    }

    private BluetoothProfile.ServiceListener mBluetoothProfileServiceListener =
        new BluetoothProfile.ServiceListener() {
        public void onServiceConnected(int profile, BluetoothProfile proxy) {
            mBluetoothHeadset = (BluetoothHeadset) proxy;
            if (VDBG) log("- Got BluetoothHeadset: " + mBluetoothHeadset);
        }

        public void onServiceDisconnected(int profile) {
            mBluetoothHeadset = null;
        }
    };

    private void log(String msg) {
        Log.d(LOG_TAG, msg);
    }
}