/*
 * Copyright (C) 2017 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 android.app.backup;

import android.annotation.SystemApi;
import android.app.backup.BackupAnnotations.OperationType;
import android.content.pm.PackageInfo;
import android.os.Bundle;

/**
 * Callback class for receiving important events during backup/restore operations.
 * Events consist mostly of errors and exceptions, giving detailed reason on why a restore/backup
 * failed or any time BackupManager makes an important decision.
 * On the other hand {@link BackupObserver} will give a failure/success view without
 * getting into details why. This callback runs on the thread it was called on because it can get
 * a bit spammy.
 * These callbacks will run on the binder thread.
 *
 * @hide
 */
@SystemApi
public class BackupManagerMonitor {

  // Logging constants for BackupManagerMonitor
  public static final int LOG_EVENT_CATEGORY_TRANSPORT = 1;
  public static final int LOG_EVENT_CATEGORY_AGENT = 2;
  public static final int LOG_EVENT_CATEGORY_BACKUP_MANAGER_POLICY = 3;
  /** string : the package name */
  public static final String EXTRA_LOG_EVENT_PACKAGE_NAME =
          "android.app.backup.extra.LOG_EVENT_PACKAGE_NAME";
  /** int : the versionCode of the package named by EXTRA_LOG_EVENT_PACKAGE_NAME
   * @deprecated Use {@link #EXTRA_LOG_EVENT_PACKAGE_LONG_VERSION} */
  @Deprecated
  public static final String EXTRA_LOG_EVENT_PACKAGE_VERSION =
          "android.app.backup.extra.LOG_EVENT_PACKAGE_VERSION";
  /** long : the full versionCode of the package named by EXTRA_LOG_EVENT_PACKAGE_NAME */
  public static final String EXTRA_LOG_EVENT_PACKAGE_LONG_VERSION =
          "android.app.backup.extra.LOG_EVENT_PACKAGE_FULL_VERSION";
  /** int : the id of the log message, will be a unique identifier */
  public static final String EXTRA_LOG_EVENT_ID = "android.app.backup.extra.LOG_EVENT_ID";
  /**
   *  int : category will be one of
   *  { LOG_EVENT_CATEGORY_TRANSPORT,
   *    LOG_EVENT_CATEGORY_AGENT,
   *    LOG_EVENT_CATEGORY_BACKUP_MANAGER_POLICY}.
   */
  public static final String EXTRA_LOG_EVENT_CATEGORY =
          "android.app.backup.extra.LOG_EVENT_CATEGORY";


  /**
   * boolean: when we have an event with id LOG_EVENT_ID_KEY_VALUE_BACKUP_CANCEL we record if
   * the call was to cancel backup of all packages
   */
  public static final String EXTRA_LOG_CANCEL_ALL = "android.app.backup.extra.LOG_CANCEL_ALL";

  /**
   * string: when we have an event with id LOG_EVENT_ID_ILLEGAL_KEY we send the key that was used
   * by the app
   */
  public static final String EXTRA_LOG_ILLEGAL_KEY = "android.app.backup.extra.LOG_ILLEGAL_KEY";

  /**
   * long: when we have an event with id LOG_EVENT_ID_ERROR_PREFLIGHT we send the error code that
   * was returned by the transport during preflight
   */
  public static final String EXTRA_LOG_PREFLIGHT_ERROR =
          "android.app.backup.extra.LOG_PREFLIGHT_ERROR";

  /**
   * string: when we have an event with id LOG_EVENT_ID_EXCEPTION_FULL_BACKUP we send the
   * exception's stacktrace
   */
  public static final String EXTRA_LOG_EXCEPTION_FULL_BACKUP =
          "android.app.backup.extra.LOG_EXCEPTION_FULL_BACKUP";

  /**
   * int: when we have an event with id LOG_EVENT_ID_RESTORE_VERSION_HIGHER we send the
   * restore package version
   */
  public static final String EXTRA_LOG_RESTORE_VERSION =
          "android.app.backup.extra.LOG_RESTORE_VERSION";

  /**
   * boolean: when we have an event with id LOG_EVENT_ID_RESTORE_VERSION_HIGHER we record if
   * ApplicationInfo.FLAG_RESTORE_ANY_VERSION flag is set
   */
  public static final String EXTRA_LOG_RESTORE_ANYWAY =
          "android.app.backup.extra.LOG_RESTORE_ANYWAY";


  /**
   * boolean: when we have an event with id LOG_EVENT_ID_APK_NOT_INSTALLED we record if
   * the policy allows to install apks provided with the dataset
   */
  public static final String EXTRA_LOG_POLICY_ALLOW_APKS =
          "android.app.backup.extra.LOG_POLICY_ALLOW_APKS";


  /**
   * string: when we have an event with id LOG_EVENT_ID_EXPECTED_DIFFERENT_PACKAGE we record the
   * package name provided in the restore manifest
   */
  public static final String EXTRA_LOG_MANIFEST_PACKAGE_NAME =
          "android.app.backup.extra.LOG_MANIFEST_PACKAGE_NAME";

  /**
   * string: when we have an event with id LOG_EVENT_ID_WIDGET_METADATA_MISMATCH we record the
   * package name provided in the widget metadata
   */
  public static final String EXTRA_LOG_WIDGET_PACKAGE_NAME =
          "android.app.backup.extra.LOG_WIDGET_PACKAGE_NAME";

  /**
   * int: when we have event of id LOG_EVENT_ID_VERSION_OF_BACKUP_OLDER we send the version
   * of the backup.
   */
  public static final String EXTRA_LOG_OLD_VERSION = "android.app.backup.extra.LOG_OLD_VERSION";

  /**
   * ParcelableList: when we have an event of id LOG_EVENT_ID_AGENT_LOGGING_RESULTS we send a list
   * of {@link android.app.backup.BackupRestoreEventLogger.DataTypeResult}.
   */
  public static final String EXTRA_LOG_AGENT_LOGGING_RESULTS =
          "android.app.backup.extra.LOG_AGENT_LOGGING_RESULTS";

  /**
   * The operation type this log is associated with. See {@link OperationType}.
   *
   * @hide
   */
  public static final String EXTRA_LOG_OPERATION_TYPE = "android.app.backup.extra.OPERATION_TYPE";

  /**
   * boolean: This extra is present if the restore operation is a delayed restore.
   *
   * @hide
   */
  public static final String EXTRA_LOG_IS_DELAYED_RESTORE =
          "android.app.backup.extra.LOG_IS_DELAYED_RESTORE";

  /**
   * List of system components that do not support restore in a  V-> U OS downgrade, even if
   * restoreAnyVersion is set to true.
   * Read from Settings.Secure.V_TO_U_RESTORE_DENYLIST
   *
   * @hide
   */
  public static final String EXTRA_LOG_V_TO_U_DENYLIST = "android.app.backup.extra.V_TO_U_DENYLIST";

  /**
   * List of system components that support restore in a  V-> U OS downgrade, even if
   * restoreAnyVersion is set to false.
   * Read from Settings.Secure.V_TO_U_RESTORE_ALLOWLIST
   *
   * @hide
   */
  public static final String EXTRA_LOG_V_TO_U_ALLOWLIST =
          "android.app.backup.extra.V_TO_U_ALLOWLIST";

  /**
   * An int indicating why a backup was cancelled. One of {@link
   * com.android.server.backup.BackupRestoreTask.CancellationReason}.
   *
   * @hide
   */
  public static final String EXTRA_LOG_CANCELLATION_REASON =
          "android.app.backup.extra.CANCELLATION_REASON";

  // TODO complete this list with all log messages. And document properly.
  public static final int LOG_EVENT_ID_FULL_BACKUP_CANCEL = 4;
  public static final int LOG_EVENT_ID_ILLEGAL_KEY = 5;
  public static final int LOG_EVENT_ID_NO_DATA_TO_SEND = 7;
  public static final int LOG_EVENT_ID_PACKAGE_INELIGIBLE = 9;
  public static final int LOG_EVENT_ID_PACKAGE_KEY_VALUE_PARTICIPANT = 10;
  public static final int LOG_EVENT_ID_PACKAGE_STOPPED = 11;
  public static final int LOG_EVENT_ID_PACKAGE_NOT_FOUND = 12;
  public static final int LOG_EVENT_ID_BACKUP_DISABLED = 13;
  public static final int LOG_EVENT_ID_DEVICE_NOT_PROVISIONED = 14;
  public static final int LOG_EVENT_ID_PACKAGE_TRANSPORT_NOT_PRESENT = 15;
  public static final int LOG_EVENT_ID_ERROR_PREFLIGHT = 16;
  public static final int LOG_EVENT_ID_QUOTA_HIT_PREFLIGHT = 18;
  public static final int LOG_EVENT_ID_EXCEPTION_FULL_BACKUP = 19;
  public static final int LOG_EVENT_ID_KEY_VALUE_BACKUP_CANCEL = 21;
  public static final int LOG_EVENT_ID_NO_RESTORE_METADATA_AVAILABLE = 22;
  public static final int LOG_EVENT_ID_NO_PM_METADATA_RECEIVED = 23;
  public static final int LOG_EVENT_ID_PM_AGENT_HAS_NO_METADATA = 24;
  public static final int LOG_EVENT_ID_LOST_TRANSPORT = 25;
  public static final int LOG_EVENT_ID_PACKAGE_NOT_PRESENT = 26;
  public static final int LOG_EVENT_ID_RESTORE_VERSION_HIGHER = 27;
  public static final int LOG_EVENT_ID_APP_HAS_NO_AGENT = 28;
  public static final int LOG_EVENT_ID_SIGNATURE_MISMATCH = 29;
  public static final int LOG_EVENT_ID_CANT_FIND_AGENT = 30;
  public static final int LOG_EVENT_ID_KEY_VALUE_RESTORE_TIMEOUT = 31;
  public static final int LOG_EVENT_ID_RESTORE_ANY_VERSION = 34;
  public static final int LOG_EVENT_ID_VERSIONS_MATCH = 35;
  public static final int LOG_EVENT_ID_VERSION_OF_BACKUP_OLDER = 36;
  public static final int LOG_EVENT_ID_FULL_RESTORE_SIGNATURE_MISMATCH = 37;
  public static final int LOG_EVENT_ID_SYSTEM_APP_NO_AGENT = 38;
  public static final int LOG_EVENT_ID_FULL_RESTORE_ALLOW_BACKUP_FALSE = 39;
  public static final int LOG_EVENT_ID_APK_NOT_INSTALLED = 40;
  public static final int LOG_EVENT_ID_CANNOT_RESTORE_WITHOUT_APK = 41;
  public static final int LOG_EVENT_ID_MISSING_SIGNATURE = 42;
  public static final int LOG_EVENT_ID_EXPECTED_DIFFERENT_PACKAGE = 43;
  public static final int LOG_EVENT_ID_UNKNOWN_VERSION = 44;
  public static final int LOG_EVENT_ID_FULL_RESTORE_TIMEOUT = 45;
  public static final int LOG_EVENT_ID_CORRUPT_MANIFEST = 46;
  public static final int LOG_EVENT_ID_WIDGET_METADATA_MISMATCH = 47;
  public static final int LOG_EVENT_ID_WIDGET_UNKNOWN_VERSION = 48;
  public static final int LOG_EVENT_ID_NO_PACKAGES = 49;
  public static final int LOG_EVENT_ID_TRANSPORT_IS_NULL = 50;
  /** The transport returned {@link BackupTransport#TRANSPORT_NON_INCREMENTAL_BACKUP_REQUIRED}. */
  public static final int LOG_EVENT_ID_TRANSPORT_NON_INCREMENTAL_BACKUP_REQUIRED = 51;

  public static final int LOG_EVENT_ID_AGENT_LOGGING_RESULTS = 52;
  /** @hide */
  public static final int LOG_EVENT_ID_START_SYSTEM_RESTORE = 53;
  /** @hide */
  public static final int LOG_EVENT_ID_START_RESTORE_AT_INSTALL = 54;
  /** A transport error happened during {@link PerformUnifiedRestoreTask#startRestore()}
  @hide */
  public static final int LOG_EVENT_ID_TRANSPORT_ERROR_DURING_START_RESTORE = 55;
  /** Unable to get the name of the next package in the queue during a restore operation
  @hide */
  public static final int LOG_EVENT_ID_CANNOT_GET_NEXT_PKG_NAME = 56;
  /** Attempting a restore operation that is neither KV nor full
  @hide */
  public static final int LOG_EVENT_ID_UNKNOWN_RESTORE_TYPE = 57;
  /** The package is part of KeyValue restore
  @hide */
  public static final int LOG_EVENT_ID_KV_RESTORE = 58;
  /** The package is part of Full restore
  @hide */
  public static final int LOG_EVENT_ID_FULL_RESTORE = 59;
  /** Unable to fetch the nest restore target in the queue
  @hide */
  public static final int LOG_EVENT_ID_NO_NEXT_RESTORE_TARGET = 60;
  /** An error occurred while attempting KeyValueRestore
  @hide */
  public static final int LOG_EVENT_ID_KV_AGENT_ERROR = 61;
  /** Restore operation finished for the given package
  @hide */
  public static final int LOG_EVENT_ID_PACKAGE_RESTORE_FINISHED= 62;
  /** A transport error happened during
   * {@link PerformUnifiedRestoreTask#initiateOneRestore(PackageInfo, long)}
  @hide */
  public static final int LOG_EVENT_ID_TRANSPORT_ERROR_KV_RESTORE = 63;
  /** Unable to instantiate the feeder thread in full restore
  @hide */
  public static final int LOG_EVENT_ID_NO_FEEDER_THREAD = 64;
  /** An error occurred while attempting Full restore
  @hide */
  public static final int LOG_EVENT_ID_FULL_AGENT_ERROR = 65;
  /** A transport error happened during a full restore
  @hide */
  public static final int LOG_EVENT_ID_TRANSPORT_ERROR_FULL_RESTORE = 66;
  /** Start restore operation for a given package
  @hide */
  public static final int LOG_EVENT_ID_START_PACKAGE_RESTORE = 67;
  /** Whole restore operation is complete
  @hide */
  public static final int LOG_EVENT_ID_RESTORE_COMPLETE = 68;
  /** Agent error during {@link PerformUnifiedRestoreTask#restoreFinished()}
   @hide */
  public static final int LOG_EVENT_ID_AGENT_FAILURE = 69;
  /** V to U restore attempt, pkg is eligible
   @hide */
  public static final int LOG_EVENT_ID_V_TO_U_RESTORE_PKG_ELIGIBLE = 70;
  /** V to U restore attempt, pkg is not eligible
   @hide */
  public static final int LOG_EVENT_ID_V_TO_U_RESTORE_PKG_NOT_ELIGIBLE = 71;
  /** V to U restore attempt, allowlist and denlist are set
   @hide */
  public static final int LOG_EVENT_ID_V_TO_U_RESTORE_SET_LIST = 72;
  /** As part of package install, {@link PackageManager} invoked restore.
   @hide */
  public static final int LOG_EVENT_ID_RESTORE_AT_INSTALL_INVOKED = 73;
  /** Skipping restore at package install
   @hide */
  public static final int LOG_EVENT_ID_SKIP_RESTORE_AT_INSTALL = 74;
  /** Package is eligible and is accepted for restore
   @hide */
  public static final int LOG_EVENT_ID_PACKAGE_ACCEPTED_FOR_RESTORE = 75;
  /** Restore data doesn't belong to the package for which restore is started
   @hide */
  public static final int LOG_EVENT_ID_RESTORE_DATA_DOES_NOT_BELONG_TO_PACKAGE = 76;
  /** Unable to create BackupAgent for package for restore
   @hide */
  public static final int LOG_EVENT_ID_UNABLE_TO_CREATE_AGENT_FOR_RESTORE = 77;
  /** BackupAgent crashed after creation but before accepting any data
   @hide */
  public static final int LOG_EVENT_ID_AGENT_CRASHED_BEFORE_RESTORE_DATA_IS_SENT = 78;
  /** Failure in streaming restore data to BackupAgent
   @hide */
  public static final int LOG_EVENT_ID_FAILED_TO_SEND_DATA_TO_AGENT_DURING_RESTORE = 79;
  /** BackupAgent related failure during restore
   @hide */
  public static final int LOG_EVENT_ID_AGENT_FAILURE_DURING_RESTORE = 80;
  /** Failure in reading data from TransportPackage during restore
   @hide */
  public static final int LOG_EVENT_ID_FAILED_TO_READ_DATA_FROM_TRANSPORT = 81;

  /**
   * The pipe between the BackupAgent and the framework was broken during full backup.
   * @hide
   */
  public static final int LOG_EVENT_ID_FULL_BACKUP_AGENT_PIPE_BROKEN = 82;

  /**
   * Restore cancelled for the given package.
   * @hide
   */
  public static final int LOG_EVENT_ID_RESTORE_CANCELLED = 83;

  /**
   * The delayed restore cleanup for a package has started.
   * @hide
   */
  public static final int LOG_EVENT_ID_START_DELAYED_RESTORE_CLEANUP = 84;

  /**
   * The delayed restore cleanup for a package has finished.
   * @hide
   */
  public static final int LOG_EVENT_ID_DELAYED_RESTORE_CLEANUP_FINISHED = 85;

  /**
   * A delayed restore operation was successfully scheduled.
   * @hide
   */
  public static final int LOG_EVENT_ID_DELAYED_RESTORE_SCHEDULED = 86;

  /**
   * This method will be called each time something important happens on BackupManager.
   *
   * @param event bundle will contain data about event:
   *    - event id, not optional, a unique identifier for each event.
   *    - package name, optional, the current package we're backing up/restoring if applicable.
   *    - package version, optional, the current package version  we're backing up/restoring
   *          if applicable.
   *    - category of event, not optional, one of
   *          { LOG_EVENT_CATEGORY_TRANSPORT,
   *            LOG_EVENT_CATEGORY_AGENT,
   *            LOG_EVENT_CATEGORY_BACKUP_MANAGER_POLICY}
   *
   */
  public void onEvent(Bundle event) {
  }
}
