/*
 * Copyright (C) 2016 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.systemui.doze;

import android.annotation.Nullable;
import android.app.UiModeManager;
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.content.IntentFilter;
import android.content.res.Configuration;
import android.hardware.display.AmbientDisplayConfiguration;
import android.os.SystemClock;
import android.os.UserHandle;
import android.text.format.Formatter;
import android.util.IndentingPrintWriter;
import android.util.Log;
import android.view.Display;

import com.android.internal.annotations.VisibleForTesting;
import com.android.internal.logging.UiEvent;
import com.android.internal.logging.UiEventLogger;
import com.android.systemui.biometrics.AuthController;
import com.android.systemui.broadcast.BroadcastDispatcher;
import com.android.systemui.dagger.qualifiers.Main;
import com.android.systemui.dock.DockManager;
import com.android.systemui.doze.DozeMachine.State;
import com.android.systemui.doze.dagger.DozeScope;
import com.android.systemui.statusbar.phone.DozeParameters;
import com.android.systemui.statusbar.policy.DevicePostureController;
import com.android.systemui.statusbar.policy.KeyguardStateController;
import com.android.systemui.util.Assert;
import com.android.systemui.util.concurrency.DelayableExecutor;
import com.android.systemui.util.sensors.AsyncSensorManager;
import com.android.systemui.util.sensors.ProximityCheck;
import com.android.systemui.util.sensors.ProximitySensor;
import com.android.systemui.util.settings.SecureSettings;
import com.android.systemui.util.wakelock.WakeLock;

import java.io.PrintWriter;
import java.util.Optional;
import java.util.function.Consumer;

import javax.inject.Inject;

/**
 * Handles triggers for ambient state changes.
 */
@DozeScope
public class DozeTriggers implements DozeMachine.Part {

    private static final String TAG = "DozeTriggers";
    private static final boolean DEBUG = DozeService.DEBUG;

    /** adb shell am broadcast -a com.android.systemui.doze.pulse com.android.systemui */
    private static final String PULSE_ACTION = "com.android.systemui.doze.pulse";

    /**
     * Last value sent by the wake-display sensor.
     * Assuming that the screen should start on.
     */
    private static boolean sWakeDisplaySensorState = true;

    private static final int PROXIMITY_TIMEOUT_DELAY_MS = 500;

    private final Context mContext;
    private DozeMachine mMachine;
    private final DozeLog mDozeLog;
    private final DozeSensors mDozeSensors;
    private final DozeHost mDozeHost;
    private final AmbientDisplayConfiguration mConfig;
    private final DozeParameters mDozeParameters;
    private final AsyncSensorManager mSensorManager;
    private final WakeLock mWakeLock;
    private final boolean mAllowPulseTriggers;
    private final UiModeManager mUiModeManager;
    private final TriggerReceiver mBroadcastReceiver = new TriggerReceiver();
    private final DockEventListener mDockEventListener = new DockEventListener();
    private final DockManager mDockManager;
    private final ProximityCheck mProxCheck;
    private final BroadcastDispatcher mBroadcastDispatcher;
    private final AuthController mAuthController;
    private final DelayableExecutor mMainExecutor;
    private final KeyguardStateController mKeyguardStateController;
    private final UiEventLogger mUiEventLogger;
    private final DevicePostureController mDevicePostureController;

    private long mNotificationPulseTime;
    private boolean mPulsePending;
    private Runnable mAodInterruptRunnable;

    /** see {@link #onProximityFar} prox for callback */
    private boolean mWantProxSensor;
    private boolean mWantTouchScreenSensors;
    private boolean mWantSensors;

    @VisibleForTesting
    public enum DozingUpdateUiEvent implements UiEventLogger.UiEventEnum {
        @UiEvent(doc = "Dozing updated due to notification.")
        DOZING_UPDATE_NOTIFICATION(433),

        @UiEvent(doc = "Dozing updated due to sigmotion.")
        DOZING_UPDATE_SIGMOTION(434),

        @UiEvent(doc = "Dozing updated because sensor was picked up.")
        DOZING_UPDATE_SENSOR_PICKUP(435),

        @UiEvent(doc = "Dozing updated because sensor was double tapped.")
        DOZING_UPDATE_SENSOR_DOUBLE_TAP(436),

        @UiEvent(doc = "Dozing updated because sensor was long squeezed.")
        DOZING_UPDATE_SENSOR_LONG_SQUEEZE(437),

        @UiEvent(doc = "Dozing updated due to docking.")
        DOZING_UPDATE_DOCKING(438),

        @UiEvent(doc = "Dozing updated because sensor woke up.")
        DOZING_UPDATE_SENSOR_WAKEUP(439),

        @UiEvent(doc = "Dozing updated because sensor woke up the lockscreen.")
        DOZING_UPDATE_SENSOR_WAKE_LOCKSCREEN(440),

        @UiEvent(doc = "Dozing updated because sensor was tapped.")
        DOZING_UPDATE_SENSOR_TAP(441),

        @UiEvent(doc = "Dozing updated because on display auth was triggered from AOD.")
        DOZING_UPDATE_AUTH_TRIGGERED(657),

        @UiEvent(doc = "Dozing updated because quick pickup sensor woke up.")
        DOZING_UPDATE_QUICK_PICKUP(708),

        @UiEvent(doc = "Dozing updated - sensor wakeup timed out (from quick pickup or presence)")
        DOZING_UPDATE_WAKE_TIMEOUT(794);

        private final int mId;

        DozingUpdateUiEvent(int id) {
            mId = id;
        }

        @Override
        public int getId() {
            return mId;
        }

        static DozingUpdateUiEvent fromReason(int reason) {
            switch (reason) {
                case 1: return DOZING_UPDATE_NOTIFICATION;
                case 2: return DOZING_UPDATE_SIGMOTION;
                case 3: return DOZING_UPDATE_SENSOR_PICKUP;
                case 4: return DOZING_UPDATE_SENSOR_DOUBLE_TAP;
                case 5: return DOZING_UPDATE_SENSOR_LONG_SQUEEZE;
                case 6: return DOZING_UPDATE_DOCKING;
                case 7: return DOZING_UPDATE_SENSOR_WAKEUP;
                case 8: return DOZING_UPDATE_SENSOR_WAKE_LOCKSCREEN;
                case 9: return DOZING_UPDATE_SENSOR_TAP;
                case 10: return DOZING_UPDATE_AUTH_TRIGGERED;
                case 11: return DOZING_UPDATE_QUICK_PICKUP;
                default: return null;
            }
        }
    }

    @Inject
    public DozeTriggers(Context context, DozeHost dozeHost,
            AmbientDisplayConfiguration config,
            DozeParameters dozeParameters, AsyncSensorManager sensorManager,
            WakeLock wakeLock, DockManager dockManager,
            ProximitySensor proximitySensor,
            ProximityCheck proxCheck,
            DozeLog dozeLog, BroadcastDispatcher broadcastDispatcher,
            SecureSettings secureSettings, AuthController authController,
            @Main DelayableExecutor mainExecutor,
            UiEventLogger uiEventLogger,
            KeyguardStateController keyguardStateController,
            DevicePostureController devicePostureController) {
        mContext = context;
        mDozeHost = dozeHost;
        mConfig = config;
        mDozeParameters = dozeParameters;
        mSensorManager = sensorManager;
        mWakeLock = wakeLock;
        mAllowPulseTriggers = true;

        mDevicePostureController = devicePostureController;
        mDozeSensors = new DozeSensors(context, mSensorManager, dozeParameters,
                config, wakeLock, this::onSensor, this::onProximityFar, dozeLog, proximitySensor,
                secureSettings, authController, devicePostureController);

        mUiModeManager = mContext.getSystemService(UiModeManager.class);
        mDockManager = dockManager;
        mProxCheck = proxCheck;
        mDozeLog = dozeLog;
        mBroadcastDispatcher = broadcastDispatcher;
        mAuthController = authController;
        mMainExecutor = mainExecutor;
        mUiEventLogger = uiEventLogger;
        mKeyguardStateController = keyguardStateController;
    }
    private final DevicePostureController.Callback mDevicePostureCallback =
            posture -> {

            };

    @Override
    public void setDozeMachine(DozeMachine dozeMachine) {
        mMachine = dozeMachine;
    }

    @Override
    public void destroy() {
        mDozeSensors.destroy();
    }

    private void onNotification(Runnable onPulseSuppressedListener) {
        if (DozeMachine.DEBUG) {
            Log.d(TAG, "requestNotificationPulse");
        }
        if (!sWakeDisplaySensorState) {
            Log.d(TAG, "Wake display false. Pulse denied.");
            runIfNotNull(onPulseSuppressedListener);
            mDozeLog.tracePulseDropped("wakeDisplaySensor");
            return;
        }
        mNotificationPulseTime = SystemClock.elapsedRealtime();
        if (!mConfig.pulseOnNotificationEnabled(UserHandle.USER_CURRENT)) {
            runIfNotNull(onPulseSuppressedListener);
            mDozeLog.tracePulseDropped("pulseOnNotificationsDisabled");
            return;
        }
        if (mDozeHost.isDozeSuppressed()) {
            runIfNotNull(onPulseSuppressedListener);
            mDozeLog.tracePulseDropped("dozeSuppressed");
            return;
        }
        requestPulse(DozeLog.PULSE_REASON_NOTIFICATION, false /* performedProxCheck */,
                onPulseSuppressedListener);
        mDozeLog.traceNotificationPulse();
    }

    private static void runIfNotNull(Runnable runnable) {
        if (runnable != null) {
            runnable.run();
        }
    }

    private void proximityCheckThenCall(Consumer<Boolean> callback,
            boolean alreadyPerformedProxCheck,
            int reason) {
        Boolean cachedProxNear = mDozeSensors.isProximityCurrentlyNear();
        if (alreadyPerformedProxCheck) {
            callback.accept(null);
        } else if (cachedProxNear != null) {
            callback.accept(cachedProxNear);
        } else {
            final long start = SystemClock.uptimeMillis();
            mProxCheck.check(PROXIMITY_TIMEOUT_DELAY_MS, near -> {
                final long end = SystemClock.uptimeMillis();
                mDozeLog.traceProximityResult(
                        near == null ? false : near,
                        end - start,
                        reason);
                callback.accept(near);
                mWakeLock.release(TAG);
            });
            mWakeLock.acquire(TAG);
        }
    }

    @VisibleForTesting
    void onSensor(int pulseReason, float screenX, float screenY, float[] rawValues) {
        boolean isDoubleTap = pulseReason == DozeLog.REASON_SENSOR_DOUBLE_TAP;
        boolean isTap = pulseReason == DozeLog.REASON_SENSOR_TAP;
        boolean isPickup = pulseReason == DozeLog.REASON_SENSOR_PICKUP;
        boolean isLongPress = pulseReason == DozeLog.PULSE_REASON_SENSOR_LONG_PRESS;
        boolean isWakeOnPresence = pulseReason == DozeLog.REASON_SENSOR_WAKE_UP_PRESENCE;
        boolean isWakeOnReach = pulseReason == DozeLog.PULSE_REASON_SENSOR_WAKE_REACH;
        boolean isUdfpsLongPress = pulseReason == DozeLog.REASON_SENSOR_UDFPS_LONG_PRESS;
        boolean isQuickPickup = pulseReason == DozeLog.REASON_SENSOR_QUICK_PICKUP;
        boolean isWakeDisplayEvent = isQuickPickup || ((isWakeOnPresence || isWakeOnReach)
                && rawValues != null && rawValues.length > 0 && rawValues[0] != 0);

        if (isWakeOnPresence) {
            onWakeScreen(isWakeDisplayEvent,
                    mMachine.isExecutingTransition() ? null : mMachine.getState(),
                    pulseReason);
        } else if (isLongPress) {
            requestPulse(pulseReason, true /* alreadyPerformedProxCheck */,
                    null /* onPulseSuppressedListener */);
        } else if (isWakeOnReach || isQuickPickup) {
            if (isWakeDisplayEvent) {
                requestPulse(pulseReason, true /* alreadyPerformedProxCheck */,
                        null /* onPulseSuppressedListener */);
            }
        } else {
            proximityCheckThenCall((result) -> {
                if (result != null && result) {
                    // In pocket, drop event.
                    mDozeLog.traceSensorEventDropped(pulseReason, "prox reporting near");
                    return;
                }
                if (isDoubleTap || isTap) {
                    if (screenX != -1 && screenY != -1) {
                        mDozeHost.onSlpiTap(screenX, screenY);
                    }
                    gentleWakeUp(pulseReason);
                } else if (isPickup) {
                    if (shouldDropPickupEvent())  {
                        mDozeLog.traceSensorEventDropped(pulseReason, "keyguard occluded");
                        return;
                    }
                    gentleWakeUp(pulseReason);
                } else if (isUdfpsLongPress) {
                    final State state = mMachine.getState();
                    if (state == State.DOZE_AOD || state == State.DOZE) {
                        // Since the gesture won't be received by the UDFPS view, we need to
                        // manually inject an event once the display is ON
                        mAodInterruptRunnable = () ->
                            mAuthController.onAodInterrupt((int) screenX, (int) screenY,
                                rawValues[3] /* major */, rawValues[4] /* minor */);
                    }

                    requestPulse(DozeLog.REASON_SENSOR_UDFPS_LONG_PRESS, true, null);
                } else {
                    mDozeHost.extendPulse(pulseReason);
                }
            }, true /* alreadyPerformedProxCheck */, pulseReason);
        }

        if (isPickup && !shouldDropPickupEvent()) {
            final long timeSinceNotification =
                    SystemClock.elapsedRealtime() - mNotificationPulseTime;
            final boolean withinVibrationThreshold =
                    timeSinceNotification < mDozeParameters.getPickupVibrationThreshold();
            mDozeLog.tracePickupWakeUp(withinVibrationThreshold);
        }
    }

    private boolean shouldDropPickupEvent() {
        return mKeyguardStateController.isOccluded();
    }

    private void gentleWakeUp(int reason) {
        // Log screen wake up reason (lift/pickup, tap, double-tap)
        Optional.ofNullable(DozingUpdateUiEvent.fromReason(reason))
                .ifPresent(mUiEventLogger::log);
        if (mDozeParameters.getDisplayNeedsBlanking()) {
            // Let's prepare the display to wake-up by drawing black.
            // This will cover the hardware wake-up sequence, where the display
            // becomes black for a few frames.
            mDozeHost.setAodDimmingScrim(1f);
        }
        mMachine.wakeUp();
    }

    private void onProximityFar(boolean far) {
        // Proximity checks are asynchronous and the user might have interacted with the phone
        // when a new event is arriving. This means that a state transition might have happened
        // and the proximity check is now obsolete.
        if (mMachine.isExecutingTransition()) {
            Log.w(TAG, "onProximityFar called during transition. Ignoring sensor response.");
            return;
        }

        final boolean near = !far;
        final DozeMachine.State state = mMachine.getState();
        final boolean paused = (state == DozeMachine.State.DOZE_AOD_PAUSED);
        final boolean pausing = (state == DozeMachine.State.DOZE_AOD_PAUSING);
        final boolean aod = (state == DozeMachine.State.DOZE_AOD);

        if (state == DozeMachine.State.DOZE_PULSING
                || state == DozeMachine.State.DOZE_PULSING_BRIGHT) {
            boolean ignoreTouch = near;
            if (DEBUG) {
                Log.i(TAG, "Prox changed, ignore touch = " + ignoreTouch);
            }
            mDozeHost.onIgnoreTouchWhilePulsing(ignoreTouch);
        }

        if (far && (paused || pausing)) {
            if (DEBUG) {
                Log.i(TAG, "Prox FAR, unpausing AOD");
            }
            mMachine.requestState(DozeMachine.State.DOZE_AOD);
        } else if (near && aod) {
            if (DEBUG) {
                Log.i(TAG, "Prox NEAR, pausing AOD");
            }
            mMachine.requestState(DozeMachine.State.DOZE_AOD_PAUSING);
        }
    }

    /**
     * When a wake screen event is received from a sensor
     * @param wake {@code true} when it's time to wake up, {@code false} when we should sleep.
     * @param state The current state, or null if the state could not be determined due to enqueued
     *              transitions.
     */
    private void onWakeScreen(boolean wake, @Nullable DozeMachine.State state, int reason) {
        mDozeLog.traceWakeDisplay(wake, reason);
        sWakeDisplaySensorState = wake;

        if (wake) {
            proximityCheckThenCall((result) -> {
                if (result != null && result) {
                    // In pocket, drop event.
                    return;
                }
                if (state == DozeMachine.State.DOZE) {
                    mMachine.requestState(DozeMachine.State.DOZE_AOD);
                    // Log sensor triggered
                    Optional.ofNullable(DozingUpdateUiEvent.fromReason(reason))
                            .ifPresent(mUiEventLogger::log);
                }
            }, false /* alreadyPerformedProxCheck */, reason);
        } else {
            boolean paused = (state == DozeMachine.State.DOZE_AOD_PAUSED);
            boolean pausing = (state == DozeMachine.State.DOZE_AOD_PAUSING);

            if (!pausing && !paused) {
                mMachine.requestState(DozeMachine.State.DOZE);
                // log wake timeout
                mUiEventLogger.log(DozingUpdateUiEvent.DOZING_UPDATE_WAKE_TIMEOUT);
            }
        }
    }

    @Override
    public void transitionTo(DozeMachine.State oldState, DozeMachine.State newState) {
        switch (newState) {
            case INITIALIZED:
                mAodInterruptRunnable = null;
                sWakeDisplaySensorState = true;
                mBroadcastReceiver.register(mBroadcastDispatcher);
                mDozeHost.addCallback(mHostCallback);
                mDockManager.addListener(mDockEventListener);
                mDozeSensors.requestTemporaryDisable();
                checkTriggersAtInit();
                break;
            case DOZE:
            case DOZE_AOD:
                mAodInterruptRunnable = null;
                mWantProxSensor = newState != DozeMachine.State.DOZE;
                mWantSensors = true;
                mWantTouchScreenSensors = true;
                if (newState == DozeMachine.State.DOZE_AOD && !sWakeDisplaySensorState) {
                    onWakeScreen(false, newState, DozeLog.REASON_SENSOR_WAKE_UP_PRESENCE);
                }
                break;
            case DOZE_AOD_PAUSED:
            case DOZE_AOD_PAUSING:
                mWantProxSensor = true;
                break;
            case DOZE_PULSING:
            case DOZE_PULSING_BRIGHT:
                mWantProxSensor = true;
                mWantTouchScreenSensors = false;
                break;
            case DOZE_AOD_DOCKED:
                mWantProxSensor = false;
                mWantTouchScreenSensors = false;
                break;
            case DOZE_PULSE_DONE:
                mDozeSensors.requestTemporaryDisable();
                break;
            case FINISH:
                mBroadcastReceiver.unregister(mBroadcastDispatcher);
                mDozeHost.removeCallback(mHostCallback);
                mDockManager.removeListener(mDockEventListener);
                mDozeSensors.setListening(false, false);
                mDozeSensors.setProxListening(false);
                mWantSensors = false;
                mWantProxSensor = false;
                mWantTouchScreenSensors = false;
                break;
            default:
        }
        mDozeSensors.setListening(mWantSensors, mWantTouchScreenSensors);
    }

    @Override
    public void onScreenState(int state) {
        mDozeSensors.onScreenState(state);
        final boolean lowPowerStateOrOff = state == Display.STATE_DOZE
                || state == Display.STATE_DOZE_SUSPEND || state == Display.STATE_OFF;
        mDozeSensors.setProxListening(mWantProxSensor && lowPowerStateOrOff);
        mDozeSensors.setListening(mWantSensors, mWantTouchScreenSensors, lowPowerStateOrOff);

        if (mAodInterruptRunnable != null && state == Display.STATE_ON) {
            mAodInterruptRunnable.run();
            mAodInterruptRunnable = null;
        }
    }


    private void checkTriggersAtInit() {
        if (mUiModeManager.getCurrentModeType() == Configuration.UI_MODE_TYPE_CAR
                || mDozeHost.isBlockingDoze()
                || !mDozeHost.isProvisioned()) {
            mMachine.requestState(DozeMachine.State.FINISH);
        }
    }

    private void requestPulse(final int reason, boolean performedProxCheck,
            Runnable onPulseSuppressedListener) {
        Assert.isMainThread();
        mDozeHost.extendPulse(reason);

        // we can't determine the dozing state if we're currently transitioning
        final DozeMachine.State dozeState =
                mMachine.isExecutingTransition() ? null : mMachine.getState();

        // When already pulsing we're allowed to show the wallpaper directly without
        // requesting a new pulse.
        if (dozeState == DozeMachine.State.DOZE_PULSING
                && reason == DozeLog.PULSE_REASON_SENSOR_WAKE_REACH) {
            mMachine.requestState(DozeMachine.State.DOZE_PULSING_BRIGHT);
            return;
        }

        if (mPulsePending || !mAllowPulseTriggers || !canPulse()) {
            if (mAllowPulseTriggers) {
                mDozeLog.tracePulseDropped(mPulsePending, dozeState, mDozeHost.isPulsingBlocked());
            }
            runIfNotNull(onPulseSuppressedListener);
            return;
        }

        mPulsePending = true;
        proximityCheckThenCall((result) -> {
            if (result != null && result) {
                // in pocket, abort pulse
                mDozeLog.tracePulseDropped("inPocket");
                mPulsePending = false;
                runIfNotNull(onPulseSuppressedListener);
            } else {
                // not in pocket, continue pulsing
                continuePulseRequest(reason);
            }
        }, !mDozeParameters.getProxCheckBeforePulse() || performedProxCheck, reason);

        // Logs request pulse reason on AOD screen.
        Optional.ofNullable(DozingUpdateUiEvent.fromReason(reason))
                .ifPresent(mUiEventLogger::log);
    }

    private boolean canPulse() {
        return mMachine.getState() == DozeMachine.State.DOZE
                || mMachine.getState() == DozeMachine.State.DOZE_AOD
                || mMachine.getState() == DozeMachine.State.DOZE_AOD_DOCKED;
    }

    private void continuePulseRequest(int reason) {
        mPulsePending = false;
        if (mDozeHost.isPulsingBlocked() || !canPulse()) {
            mDozeLog.tracePulseDropped(mPulsePending, mMachine.getState(),
                    mDozeHost.isPulsingBlocked());
            return;
        }
        mMachine.requestPulse(reason);
    }

    @Override
    public void dump(PrintWriter pw) {
        pw.println(" mAodInterruptRunnable=" + mAodInterruptRunnable);

        pw.print(" notificationPulseTime=");
        pw.println(Formatter.formatShortElapsedTime(mContext, mNotificationPulseTime));

        pw.println(" pulsePending=" + mPulsePending);
        pw.println("DozeSensors:");
        IndentingPrintWriter idpw = new IndentingPrintWriter(pw);
        idpw.increaseIndent();
        mDozeSensors.dump(idpw);
    }

    private class TriggerReceiver extends BroadcastReceiver {
        private boolean mRegistered;

        @Override
        public void onReceive(Context context, Intent intent) {
            if (PULSE_ACTION.equals(intent.getAction())) {
                if (DozeMachine.DEBUG) Log.d(TAG, "Received pulse intent");
                requestPulse(DozeLog.PULSE_REASON_INTENT, false, /* performedProxCheck */
                        null /* onPulseSuppressedListener */);
            }
            if (UiModeManager.ACTION_ENTER_CAR_MODE.equals(intent.getAction())) {
                mMachine.requestState(DozeMachine.State.FINISH);
            }
            if (Intent.ACTION_USER_SWITCHED.equals(intent.getAction())) {
                mDozeSensors.onUserSwitched();
            }
        }

        public void register(BroadcastDispatcher broadcastDispatcher) {
            if (mRegistered) {
                return;
            }
            IntentFilter filter = new IntentFilter(PULSE_ACTION);
            filter.addAction(UiModeManager.ACTION_ENTER_CAR_MODE);
            filter.addAction(Intent.ACTION_USER_SWITCHED);
            broadcastDispatcher.registerReceiver(this, filter);
            mRegistered = true;
        }

        public void unregister(BroadcastDispatcher broadcastDispatcher) {
            if (!mRegistered) {
                return;
            }
            broadcastDispatcher.unregisterReceiver(this);
            mRegistered = false;
        }
    }

    private class DockEventListener implements DockManager.DockEventListener {
        @Override
        public void onEvent(int event) {
            if (DEBUG) Log.d(TAG, "dock event = " + event);
            switch (event) {
                case DockManager.STATE_DOCKED:
                case DockManager.STATE_DOCKED_HIDE:
                    mDozeSensors.ignoreTouchScreenSensorsSettingInterferingWithDocking(true);
                    break;
                case DockManager.STATE_NONE:
                    mDozeSensors.ignoreTouchScreenSensorsSettingInterferingWithDocking(false);
                    break;
                default:
                    // no-op
            }
        }
    }

    private DozeHost.Callback mHostCallback = new DozeHost.Callback() {
        @Override
        public void onNotificationAlerted(Runnable onPulseSuppressedListener) {
            onNotification(onPulseSuppressedListener);
        }

        @Override
        public void onPowerSaveChanged(boolean active) {
            if (mDozeHost.isPowerSaveActive()) {
                mMachine.requestState(DozeMachine.State.DOZE);
            } else if (mMachine.getState() == DozeMachine.State.DOZE
                    && mConfig.alwaysOnEnabled(UserHandle.USER_CURRENT)) {
                mMachine.requestState(DozeMachine.State.DOZE_AOD);
            }
        }

        @Override
        public void onDozeSuppressedChanged(boolean suppressed) {
            final DozeMachine.State nextState;
            if (mConfig.alwaysOnEnabled(UserHandle.USER_CURRENT) && !suppressed) {
                nextState = DozeMachine.State.DOZE_AOD;
            } else {
                nextState = DozeMachine.State.DOZE;
            }
            mMachine.requestState(nextState);
        }
    };
}
