/*
 * Copyright (C) 2018 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.launcher3.logging;

import static com.android.launcher3.logging.StatsLogManager.LauncherEvent.LAUNCHER_ALLAPPS_CLOSE_DOWN;
import static com.android.launcher3.logging.StatsLogManager.LauncherEvent.LAUNCHER_ALLAPPS_OPEN_UP;
import static com.android.launcher3.logging.StatsLogManager.LauncherEvent.LAUNCHER_HOME_GESTURE;
import static com.android.launcher3.logging.StatsLogManager.LauncherEvent.LAUNCHER_OVERVIEW_GESTURE;

import android.content.Context;
import android.view.View;

import androidx.annotation.Nullable;
import androidx.slice.SliceItem;

import com.android.launcher3.R;
import com.android.launcher3.logger.LauncherAtom;
import com.android.launcher3.logger.LauncherAtom.ContainerInfo;
import com.android.launcher3.logger.LauncherAtom.FromState;
import com.android.launcher3.logger.LauncherAtom.ToState;
import com.android.launcher3.model.data.ItemInfo;
import com.android.launcher3.util.ResourceBasedOverride;
import com.android.launcher3.views.ActivityContext;

/**
 * Handles the user event logging in R+.
 *
 * <pre>
 * All of the event ids are defined here.
 * Most of the methods are placeholder methods for Launcher3
 * Actual call happens only for Launcher variant that implements QuickStep.
 * </pre>
 */
public class StatsLogManager implements ResourceBasedOverride {

    public static final int LAUNCHER_STATE_UNSPECIFIED = 0;
    public static final int LAUNCHER_STATE_BACKGROUND = 1;
    public static final int LAUNCHER_STATE_HOME = 2;
    public static final int LAUNCHER_STATE_OVERVIEW = 3;
    public static final int LAUNCHER_STATE_ALLAPPS = 4;
    public static final int LAUNCHER_STATE_UNCHANGED = 5;

    private InstanceId mInstanceId;

    protected @Nullable ActivityContext mActivityContext = null;

    /**
     * Returns event enum based on the two state transition information when swipe
     * gesture happens(to be removed during UserEventDispatcher cleanup).
     */
    public static EventEnum getLauncherAtomEvent(int startState,
            int targetState, EventEnum fallbackEvent) {
        if (startState == LAUNCHER_STATE_HOME
                && targetState == LAUNCHER_STATE_HOME) {
            return LAUNCHER_HOME_GESTURE;
        } else if (startState != LAUNCHER_STATE_OVERVIEW
                && targetState == LAUNCHER_STATE_OVERVIEW) {
            return LAUNCHER_OVERVIEW_GESTURE;
        } else if (startState != LAUNCHER_STATE_ALLAPPS
                && targetState == LAUNCHER_STATE_ALLAPPS) {
            return LAUNCHER_ALLAPPS_OPEN_UP;
        } else if (startState == LAUNCHER_STATE_ALLAPPS
                && targetState != LAUNCHER_STATE_ALLAPPS) {
            return LAUNCHER_ALLAPPS_CLOSE_DOWN;
        }
        return fallbackEvent; // TODO fix
    }

    public interface EventEnum {

        /**
         * Tag used to request new UI Event IDs via presubmit analysis.
         *
         * <p>Use RESERVE_NEW_UI_EVENT_ID as the constructor parameter for a new {@link EventEnum}
         * to signal the presubmit analyzer to reserve a new ID for the event. The new ID will be
         * returned as a Gerrit presubmit finding.  Do not submit {@code RESERVE_NEW_UI_EVENT_ID} as
         * the constructor parameter for any event.
         *
         * <pre>
         * &#064;UiEvent(doc = "Briefly describe the interaction when this event will be logged")
         * UNIQUE_EVENT_NAME(RESERVE_NEW_UI_EVENT_ID);
         * </pre>
         */
        int RESERVE_NEW_UI_EVENT_ID = Integer.MIN_VALUE; // Negative IDs are ignored by the logger.

        int getId();
    }

    public enum LauncherEvent implements EventEnum {
        /* Used to prevent double logging. */
        IGNORE(-1),

        @UiEvent(doc = "App launched from workspace, hotseat or folder in launcher")
        LAUNCHER_APP_LAUNCH_TAP(338),

        @UiEvent(doc = "Task launched from overview using TAP")
        LAUNCHER_TASK_LAUNCH_TAP(339),

        @UiEvent(doc = "User tapped on notification inside popup context menu.")
        LAUNCHER_NOTIFICATION_LAUNCH_TAP(516),

        @UiEvent(doc = "Task launched from overview using SWIPE DOWN")
        LAUNCHER_TASK_LAUNCH_SWIPE_DOWN(340),

        @UiEvent(doc = "TASK dismissed from overview using SWIPE UP")
        LAUNCHER_TASK_DISMISS_SWIPE_UP(341),

        @UiEvent(doc = "User dragged a launcher item")
        LAUNCHER_ITEM_DRAG_STARTED(383),

        @UiEvent(doc = "A dragged launcher item is successfully dropped onto workspace, hotseat "
                + "open folder etc")
        LAUNCHER_ITEM_DROP_COMPLETED(385),

        @UiEvent(doc = "A dragged launcher item is successfully dropped onto a folder icon.")
        LAUNCHER_ITEM_DROP_COMPLETED_ON_FOLDER_ICON(697),

        @UiEvent(doc = "A dragged launcher item is successfully dropped on another item "
                + "resulting in a new folder creation")
        LAUNCHER_ITEM_DROP_FOLDER_CREATED(386),

        @UiEvent(doc = "Folder's label is automatically assigned.")
        LAUNCHER_FOLDER_AUTO_LABELED(591),

        @UiEvent(doc = "Could not auto-label a folder because primary suggestion is null or empty.")
        LAUNCHER_FOLDER_AUTO_LABELING_SKIPPED_EMPTY_PRIMARY(592),

        @UiEvent(doc = "Could not auto-label a folder because no suggestions exist.")
        LAUNCHER_FOLDER_AUTO_LABELING_SKIPPED_EMPTY_SUGGESTIONS(593),

        @UiEvent(doc = "User manually updated the folder label.")
        LAUNCHER_FOLDER_LABEL_UPDATED(460),

        @UiEvent(doc = "User long pressed on the workspace empty space.")
        LAUNCHER_WORKSPACE_LONGPRESS(461),

        @UiEvent(doc = "User tapped or long pressed on a wallpaper icon inside launcher settings.")
        LAUNCHER_WALLPAPER_BUTTON_TAP_OR_LONGPRESS(462),

        @UiEvent(doc = "User tapped or long pressed on settings icon inside launcher settings.")
        LAUNCHER_SETTINGS_BUTTON_TAP_OR_LONGPRESS(463),

        @UiEvent(doc = "User tapped or long pressed on widget tray icon inside launcher settings.")
        LAUNCHER_WIDGETSTRAY_BUTTON_TAP_OR_LONGPRESS(464),

        @UiEvent(doc = "User expanded the list of widgets for a single app in the widget picker.")
        LAUNCHER_WIDGETSTRAY_APP_EXPANDED(818),

        @UiEvent(doc = "User searched for a widget in the widget picker.")
        LAUNCHER_WIDGETSTRAY_SEARCHED(819),

        @UiEvent(doc = "A dragged item is dropped on 'Remove' button in the target bar")
        LAUNCHER_ITEM_DROPPED_ON_REMOVE(465),

        @UiEvent(doc = "A dragged item is dropped on 'Cancel' button in the target bar")
        LAUNCHER_ITEM_DROPPED_ON_CANCEL(466),

        @UiEvent(doc = "A predicted item is dragged and dropped on 'Don't suggest app'"
                + " button in the target bar")
        LAUNCHER_ITEM_DROPPED_ON_DONT_SUGGEST(467),

        @UiEvent(doc = "A dragged item is dropped on 'Uninstall' button in target bar")
        LAUNCHER_ITEM_DROPPED_ON_UNINSTALL(468),

        @UiEvent(doc = "User completed uninstalling the package after dropping on "
                + "the icon onto 'Uninstall' button in the target bar")
        LAUNCHER_ITEM_UNINSTALL_COMPLETED(469),

        @UiEvent(doc = "User cancelled uninstalling the package after dropping on "
                + "the icon onto 'Uninstall' button in the target bar")
        LAUNCHER_ITEM_UNINSTALL_CANCELLED(470),

        @UiEvent(doc = "User tapped or long pressed on the task icon(aka package icon) "
                + "from overview to open task menu.")
        LAUNCHER_TASK_ICON_TAP_OR_LONGPRESS(517),

        @UiEvent(doc = "User opened package specific widgets list by tapping on widgets system "
                + "shortcut inside popup context menu.")
        LAUNCHER_SYSTEM_SHORTCUT_WIDGETS_TAP(514),

        @UiEvent(doc = "User tapped on app info system shortcut.")
        LAUNCHER_SYSTEM_SHORTCUT_APP_INFO_TAP(515),

        @UiEvent(doc = "User tapped on split screen icon on a task menu.")
        LAUNCHER_SYSTEM_SHORTCUT_SPLIT_SCREEN_TAP(518),

        @UiEvent(doc = "User tapped on free form icon on a task menu.")
        LAUNCHER_SYSTEM_SHORTCUT_FREE_FORM_TAP(519),

        @UiEvent(doc = "User tapped on pause app system shortcut.")
        LAUNCHER_SYSTEM_SHORTCUT_PAUSE_TAP(521),

        @UiEvent(doc = "User tapped on pin system shortcut.")
        LAUNCHER_SYSTEM_SHORTCUT_PIN_TAP(522),

        @UiEvent(doc = "User is shown All Apps education view.")
        LAUNCHER_ALL_APPS_EDU_SHOWN(523),

        @UiEvent(doc = "User opened a folder.")
        LAUNCHER_FOLDER_OPEN(551),

        @UiEvent(doc = "Hotseat education half sheet seen")
        LAUNCHER_HOTSEAT_EDU_SEEN(479),

        @UiEvent(doc = "Hotseat migration accepted")
        LAUNCHER_HOTSEAT_EDU_ACCEPT(480),

        @UiEvent(doc = "Hotseat migration denied")
        LAUNCHER_HOTSEAT_EDU_DENY(481),

        @UiEvent(doc = "Hotseat education tip shown")
        LAUNCHER_HOTSEAT_EDU_ONLY_TIP(482),

        /**
         * @deprecated LauncherUiChanged.rank field is repurposed to store all apps rank, so no
         * separate event is required.
         */
        @Deprecated
        @UiEvent(doc = "App launch ranking logged for all apps predictions")
        LAUNCHER_ALL_APPS_RANKED(552),

        @UiEvent(doc = "App launch ranking logged for hotseat predictions)")
        LAUNCHER_HOTSEAT_RANKED(553),
        @UiEvent(doc = "Launcher is now in background. e.g., Screen off event")
        LAUNCHER_ONSTOP(562),

        @UiEvent(doc = "Launcher is now in foreground. e.g., Screen on event, back button")
        LAUNCHER_ONRESUME(563),

        @UiEvent(doc = "User swipes or fling in LEFT direction on workspace.")
        LAUNCHER_SWIPELEFT(564),

        @UiEvent(doc = "User swipes or fling in RIGHT direction on workspace.")
        LAUNCHER_SWIPERIGHT(565),

        @UiEvent(doc = "User swipes or fling in UP direction in unknown way.")
        LAUNCHER_UNKNOWN_SWIPEUP(566),

        @UiEvent(doc = "User swipes or fling in DOWN direction in unknown way.")
        LAUNCHER_UNKNOWN_SWIPEDOWN(567),

        @UiEvent(doc = "User swipes or fling in UP direction to open apps drawer.")
        LAUNCHER_ALLAPPS_OPEN_UP(568),

        @UiEvent(doc = "User swipes or fling in DOWN direction to close apps drawer.")
        LAUNCHER_ALLAPPS_CLOSE_DOWN(569),

        @UiEvent(doc = "User tap outside apps drawer sheet to close apps drawer.")
        LAUNCHER_ALLAPPS_CLOSE_TAP_OUTSIDE(941),

        @UiEvent(doc = "User swipes or fling in UP direction and hold from the bottom bazel area")
        LAUNCHER_OVERVIEW_GESTURE(570),

        @UiEvent(doc = "User swipes or fling in LEFT direction on the bottom bazel area.")
        LAUNCHER_QUICKSWITCH_LEFT(571),

        @UiEvent(doc = "User swipes or fling in RIGHT direction on the bottom bazel area.")
        LAUNCHER_QUICKSWITCH_RIGHT(572),

        @UiEvent(doc = "User swipes or fling in DOWN direction on the bottom bazel area.")
        LAUNCHER_SWIPEDOWN_NAVBAR(573),

        @UiEvent(doc = "User swipes or fling in UP direction from bottom bazel area.")
        LAUNCHER_HOME_GESTURE(574),

        @UiEvent(doc = "User's workspace layout information is snapshot in the background.")
        LAUNCHER_WORKSPACE_SNAPSHOT(579),

        @UiEvent(doc = "User tapped on the screenshot button on overview)")
        LAUNCHER_OVERVIEW_ACTIONS_SCREENSHOT(580),

        @UiEvent(doc = "User tapped on the select button on overview)")
        LAUNCHER_OVERVIEW_ACTIONS_SELECT(581),

        @UiEvent(doc = "User tapped on the share button on overview")
        LAUNCHER_OVERVIEW_ACTIONS_SHARE(582),

        @UiEvent(doc = "User tapped on the split screen button on overview")
        LAUNCHER_OVERVIEW_ACTIONS_SPLIT(895),

        @UiEvent(doc = "User tapped on the close button in select mode")
        LAUNCHER_SELECT_MODE_CLOSE(583),

        @UiEvent(doc = "User tapped on the highlight items in select mode")
        LAUNCHER_SELECT_MODE_ITEM(584),

        @UiEvent(doc = "Notification dot on app icon enabled.")
        LAUNCHER_NOTIFICATION_DOT_ENABLED(611),

        @UiEvent(doc = "Notification dot on app icon disabled.")
        LAUNCHER_NOTIFICATION_DOT_DISABLED(612),

        @UiEvent(doc = "For new apps, add app icons to home screen enabled.")
        LAUNCHER_ADD_NEW_APPS_TO_HOME_SCREEN_ENABLED(613),

        @UiEvent(doc = "For new apps, add app icons to home screen disabled.")
        LAUNCHER_ADD_NEW_APPS_TO_HOME_SCREEN_DISABLED(614),

        @UiEvent(doc = "Home screen rotation is enabled when phone is rotated.")
        LAUNCHER_HOME_SCREEN_ROTATION_ENABLED(615),

        @UiEvent(doc = "Home screen rotation is disabled when phone is rotated.")
        LAUNCHER_HOME_SCREEN_ROTATION_DISABLED(616),

        @UiEvent(doc = "Suggestions in all apps list enabled.")
        LAUNCHER_ALL_APPS_SUGGESTIONS_ENABLED(619),

        @UiEvent(doc = "Suggestions in all apps list disabled.")
        LAUNCHER_ALL_APPS_SUGGESTIONS_DISABLED(620),

        @UiEvent(doc = "Suggestions on home screen is enabled.")
        LAUNCHER_HOME_SCREEN_SUGGESTIONS_ENABLED(621),

        @UiEvent(doc = "Suggestions on home screen is disabled.")
        LAUNCHER_HOME_SCREEN_SUGGESTIONS_DISABLED(622),

        @UiEvent(doc = "System navigation is 3 button mode.")
        LAUNCHER_NAVIGATION_MODE_3_BUTTON(623),

        @UiEvent(doc = "System navigation mode is 2 button mode.")
        LAUNCHER_NAVIGATION_MODE_2_BUTTON(624),

        @UiEvent(doc = "System navigation mode is 0 button mode/gesture navigation mode .")
        LAUNCHER_NAVIGATION_MODE_GESTURE_BUTTON(625),

        @UiEvent(doc = "User tapped on image content in Overview Select mode.")
        LAUNCHER_SELECT_MODE_IMAGE(627),

        @UiEvent(doc = "Activity to add external item was started")
        LAUNCHER_ADD_EXTERNAL_ITEM_START(641),

        @UiEvent(doc = "Activity to add external item was cancelled")
        LAUNCHER_ADD_EXTERNAL_ITEM_CANCELLED(642),

        @UiEvent(doc = "Activity to add external item was backed out")
        LAUNCHER_ADD_EXTERNAL_ITEM_BACK(643),

        @UiEvent(doc = "Item was placed automatically in external item addition flow")
        LAUNCHER_ADD_EXTERNAL_ITEM_PLACED_AUTOMATICALLY(644),

        @UiEvent(doc = "Item was dragged in external item addition flow")
        LAUNCHER_ADD_EXTERNAL_ITEM_DRAGGED(645),

        @UiEvent(doc = "A folder was replaced by a single item")
        LAUNCHER_FOLDER_CONVERTED_TO_ICON(646),

        @UiEvent(doc = "A hotseat prediction item was pinned")
        LAUNCHER_HOTSEAT_PREDICTION_PINNED(647),

        @UiEvent(doc = "Undo event was tapped.")
        LAUNCHER_UNDO(648),

        @UiEvent(doc = "Task switcher clear all target was tapped.")
        LAUNCHER_TASK_CLEAR_ALL(649),

        @UiEvent(doc = "Task preview was long pressed.")
        LAUNCHER_TASK_PREVIEW_LONGPRESS(650),

        @UiEvent(doc = "User swiped down on workspace (triggering noti shade to open).")
        LAUNCHER_SWIPE_DOWN_WORKSPACE_NOTISHADE_OPEN(651),

        @UiEvent(doc = "Notification dismissed by swiping right.")
        LAUNCHER_NOTIFICATION_DISMISSED(652),

        @UiEvent(doc = "Current grid size is changed to 6.")
        LAUNCHER_GRID_SIZE_6(930),

        @UiEvent(doc = "Current grid size is changed to 5.")
        LAUNCHER_GRID_SIZE_5(662),

        @UiEvent(doc = "Current grid size is changed to 4.")
        LAUNCHER_GRID_SIZE_4(663),

        @UiEvent(doc = "Current grid size is changed to 3.")
        LAUNCHER_GRID_SIZE_3(664),

        @UiEvent(doc = "Current grid size is changed to 2.")
        LAUNCHER_GRID_SIZE_2(665),

        @UiEvent(doc = "Launcher entered into AllApps state.")
        LAUNCHER_ALLAPPS_ENTRY(692),

        @UiEvent(doc = "Launcher exited from AllApps state.")
        LAUNCHER_ALLAPPS_EXIT(693),

        @UiEvent(doc = "User closed the AllApps keyboard.")
        LAUNCHER_ALLAPPS_KEYBOARD_CLOSED(694),

        @UiEvent(doc = "User switched to AllApps Main/Personal tab by swiping left.")
        LAUNCHER_ALLAPPS_SWIPE_TO_PERSONAL_TAB(695),

        @UiEvent(doc = "User switched to AllApps Work tab by swiping right.")
        LAUNCHER_ALLAPPS_SWIPE_TO_WORK_TAB(696),

        @UiEvent(doc = "Default event when dedicated UI event is not available for the user action"
                + " on slice .")
        LAUNCHER_SLICE_DEFAULT_ACTION(700),

        @UiEvent(doc = "User toggled-on a Slice item.")
        LAUNCHER_SLICE_TOGGLE_ON(701),

        @UiEvent(doc = "User toggled-off a Slice item.")
        LAUNCHER_SLICE_TOGGLE_OFF(702),

        @UiEvent(doc = "User acted on a Slice item with a button.")
        LAUNCHER_SLICE_BUTTON_ACTION(703),

        @UiEvent(doc = "User acted on a Slice item with a slider.")
        LAUNCHER_SLICE_SLIDER_ACTION(704),

        @UiEvent(doc = "User tapped on the entire row of a Slice.")
        LAUNCHER_SLICE_CONTENT_ACTION(705),

        @UiEvent(doc = "User tapped on the see more button of a Slice.")
        LAUNCHER_SLICE_SEE_MORE_ACTION(706),

        @UiEvent(doc = "User selected from a selection row of Slice.")
        LAUNCHER_SLICE_SELECTION_ACTION(707),

        @UiEvent(doc = "IME is used for selecting the focused item on the AllApps screen.")
        LAUNCHER_ALLAPPS_FOCUSED_ITEM_SELECTED_WITH_IME(718),

        @UiEvent(doc = "User long-pressed on an AllApps item.")
        LAUNCHER_ALLAPPS_ITEM_LONG_PRESSED(719),

        @UiEvent(doc = "Launcher entered into AllApps state with device search enabled.")
        LAUNCHER_ALLAPPS_ENTRY_WITH_DEVICE_SEARCH(720),

        @UiEvent(doc = "User switched to AllApps Main/Personal tab by tapping on it.")
        LAUNCHER_ALLAPPS_TAP_ON_PERSONAL_TAB(721),

        @UiEvent(doc = "User switched to AllApps Work tab by tapping on it.")
        LAUNCHER_ALLAPPS_TAP_ON_WORK_TAB(722),

        @UiEvent(doc = "All apps vertical fling started.")
        LAUNCHER_ALLAPPS_VERTICAL_SWIPE_BEGIN(724),

        @UiEvent(doc = "All apps vertical fling ended.")
        LAUNCHER_ALLAPPS_VERTICAL_SWIPE_END(725),

        @UiEvent(doc = "Show URL indicator for Overview Sharing")
        LAUNCHER_OVERVIEW_SHARING_SHOW_URL_INDICATOR(764),

        @UiEvent(doc = "Show image indicator for Overview Sharing")
        LAUNCHER_OVERVIEW_SHARING_SHOW_IMAGE_INDICATOR(765),

        @UiEvent(doc = "User taps URL indicator in Overview")
        LAUNCHER_OVERVIEW_SHARING_URL_INDICATOR_TAP(766),

        @UiEvent(doc = "User taps image indicator in Overview")
        LAUNCHER_OVERVIEW_SHARING_IMAGE_INDICATOR_TAP(767),

        @UiEvent(doc = "User long presses an image in Overview")
        LAUNCHER_OVERVIEW_SHARING_IMAGE_LONG_PRESS(768),

        @UiEvent(doc = "User drags a URL in Overview")
        LAUNCHER_OVERVIEW_SHARING_URL_DRAG(769),

        @UiEvent(doc = "User drags an image in Overview")
        LAUNCHER_OVERVIEW_SHARING_IMAGE_DRAG(770),

        @UiEvent(doc = "User drops URL to a direct share target")
        LAUNCHER_OVERVIEW_SHARING_DROP_URL_TO_TARGET(771),

        @UiEvent(doc = "User drops an image to a direct share target")
        LAUNCHER_OVERVIEW_SHARING_DROP_IMAGE_TO_TARGET(772),

        @UiEvent(doc = "User drops URL to the More button")
        LAUNCHER_OVERVIEW_SHARING_DROP_URL_TO_MORE(773),

        @UiEvent(doc = "User drops an image to the More button")
        LAUNCHER_OVERVIEW_SHARING_DROP_IMAGE_TO_MORE(774),

        @UiEvent(doc = "User taps a share target to share URL")
        LAUNCHER_OVERVIEW_SHARING_TAP_TARGET_TO_SHARE_URL(775),

        @UiEvent(doc = "User taps a share target to share an image")
        LAUNCHER_OVERVIEW_SHARING_TAP_TARGET_TO_SHARE_IMAGE(776),

        @UiEvent(doc = "User taps the More button to share URL")
        LAUNCHER_OVERVIEW_SHARING_TAP_MORE_TO_SHARE_URL(777),

        @UiEvent(doc = "User taps the More button to share an image")
        LAUNCHER_OVERVIEW_SHARING_TAP_MORE_TO_SHARE_IMAGE(778),

        @UiEvent(doc = "User started resizing a widget on their home screen.")
        LAUNCHER_WIDGET_RESIZE_STARTED(820),

        @UiEvent(doc = "User finished resizing a widget on their home screen.")
        LAUNCHER_WIDGET_RESIZE_COMPLETED(824),

        @UiEvent(doc = "User reconfigured a widget on their home screen.")
        LAUNCHER_WIDGET_RECONFIGURED(821),

        @UiEvent(doc = "User enabled themed icons option in wallpaper & style settings.")
        LAUNCHER_THEMED_ICON_ENABLED(836),

        @UiEvent(doc = "User disabled themed icons option in wallpaper & style settings.")
        LAUNCHER_THEMED_ICON_DISABLED(837),

        @UiEvent(doc = "User tapped on 'Turn on work apps' button in all apps window.")
        LAUNCHER_TURN_ON_WORK_APPS_TAP(838),

        @UiEvent(doc = "User tapped on 'Turn off work apps' button in all apps window.")
        LAUNCHER_TURN_OFF_WORK_APPS_TAP(839),

        @UiEvent(doc = "Launcher item drop failed since there was not enough room on the screen.")
        LAUNCHER_ITEM_DROP_FAILED_INSUFFICIENT_SPACE(872),

        @UiEvent(doc = "User long pressed on the taskbar background to hide the taskbar")
        LAUNCHER_TASKBAR_LONGPRESS_HIDE(896),

        @UiEvent(doc = "User long pressed on the taskbar gesture handle to show the taskbar")
        LAUNCHER_TASKBAR_LONGPRESS_SHOW(897),

        @UiEvent(doc = "User clicks on the search icon on header to launch search in app.")
        LAUNCHER_ALLAPPS_SEARCHINAPP_LAUNCH(913);

        // ADD MORE

        private final int mId;

        LauncherEvent(int id) {
            mId = id;
        }

        public int getId() {
            return mId;
        }
    }

    /**
     * Launcher specific ranking related events.
     */
    public enum LauncherRankingEvent implements EventEnum {

        UNKNOWN(0);
        // ADD MORE

        private final int mId;

        LauncherRankingEvent(int id) {
            mId = id;
        }

        public int getId() {
            return mId;
        }
    }

    /**
     * Helps to construct and log launcher event.
     */
    public interface StatsLogger {

        /**
         * Sets log fields from provided {@link ItemInfo}.
         */
        default StatsLogger withItemInfo(ItemInfo itemInfo) {
            return this;
        }


        /**
         * Sets {@link InstanceId} of log message.
         */
        default StatsLogger withInstanceId(InstanceId instanceId) {
            return this;
        }

        /**
         * Sets rank field of log message.
         */
        default StatsLogger withRank(int rank) {
            return this;
        }

        /**
         * Sets source launcher state field of log message.
         */
        default StatsLogger withSrcState(int srcState) {
            return this;
        }

        /**
         * Sets destination launcher state field of log message.
         */
        default StatsLogger withDstState(int dstState) {
            return this;
        }

        /**
         * Sets FromState field of log message.
         */
        default StatsLogger withFromState(FromState fromState) {
            return this;
        }

        /**
         * Sets ToState field of log message.
         */
        default StatsLogger withToState(ToState toState) {
            return this;
        }

        /**
         * Sets editText field of log message.
         */
        default StatsLogger withEditText(String editText) {
            return this;
        }

        /**
         * Sets the final value for container related fields of log message.
         *
         * By default container related fields are derived from {@link ItemInfo}, this method would
         * override those values.
         */
        default StatsLogger withContainerInfo(ContainerInfo containerInfo) {
            return this;
        }

        /**
         * Sets logging fields from provided {@link SliceItem}.
         */
        default StatsLogger withSliceItem(SliceItem sliceItem) {
            return this;
        }

        /**
         * Sets logging fields from provided {@link LauncherAtom.Slice}.
         */
        default StatsLogger withSlice(LauncherAtom.Slice slice) {
            return this;
        }

        /**
         * Builds the final message and logs it as {@link EventEnum}.
         */
        default void log(EventEnum event) {
        }

        /**
         * Builds the final message and logs it to two different atoms, one for
         * event tracking and the other for jank tracking.
         */
        default void sendToInteractionJankMonitor(EventEnum event, View v) {
        }
    }

    /**
     * Helps to construct and log latency event.
     */
    public interface StatsLatencyLogger {

        enum LatencyType {
            UNKNOWN(0),
            COLD(1),
            HOT(2);

            private final int mId;

            LatencyType(int id) {
                this.mId = id;
            }

            public int getId() {
                return mId;
            }

        }

        /**
         * Sets {@link InstanceId} of log message.
         */
        default StatsLatencyLogger withInstanceId(InstanceId instanceId) {
            return this;
        }


        /**
         * Sets latency of the event.
         */
        default StatsLatencyLogger withLatency(long latencyInMillis) {
            return this;
        }

        /**
         * Sets {@link LatencyType} of log message.
         */
        default StatsLatencyLogger withType(LatencyType type) {
            return this;
        }

        /**
         * Sets packageId of log message.
         */
        default StatsLatencyLogger withPackageId(int packageId) {
            return this;
        }

        /**
         * Builds the final message and logs it as {@link EventEnum}.
         */
        default void log(EventEnum event) {
        }
    }

    /**
     * Returns new logger object.
     */
    public StatsLogger logger() {
        StatsLogger logger = createLogger();
        if (mInstanceId != null) {
            logger.withInstanceId(mInstanceId);
        }
        return logger;
    }

    /**
     * Returns new latency logger object.
     */
    public StatsLatencyLogger latencyLogger() {
        StatsLatencyLogger logger = createLatencyLogger();
        if (mInstanceId != null) {
            logger.withInstanceId(mInstanceId);
        }
        return logger;
    }

    protected StatsLogger createLogger() {
        return new StatsLogger() {
        };
    }

    protected StatsLatencyLogger createLatencyLogger() {
        return new StatsLatencyLogger() {
        };
    }

    /**
     * Sets InstanceId to every new {@link StatsLogger} object returned by {@link #logger()} when
     * not-null.
     */
    public StatsLogManager withDefaultInstanceId(@Nullable InstanceId instanceId) {
        this.mInstanceId = instanceId;
        return this;
    }

    /**
     * Creates a new instance of {@link StatsLogManager} based on provided context.
     */
    public static StatsLogManager newInstance(Context context) {
        StatsLogManager manager = Overrides.getObject(StatsLogManager.class,
                context.getApplicationContext(), R.string.stats_log_manager_class);
        manager.mActivityContext = ActivityContext.lookupContextNoThrow(context);
        return manager;
    }
}
