// Copyright (C) 2019 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.google.gerrit.plugins.checks.api;

/**
 * State of a single check on a change.
 *
 * <p>This state applies to a single check; for the aggregated state associated with a change, see
 * {@link CombinedCheckState}.
 *
 * <p>Ordering is not significant in this class, but for consistency's sake the ordering matches
 * {@code CombinedCheckState} where applicable.
 */
public enum CheckState {
  /**
   * The check terminated and failed.
   *
   * <p>Failure may include the following cases:
   *
   * <ul>
   *   <li>The check completed normally and found a problem with the code in the change.
   *   <li>The check failed to start.
   *   <li>The check started, but failed for some reason not directly related to the code, such as a
   *       setup failure in the checker.
   * </ul>
   */
  FAILED(false),

  /** The check is relevant to the change, but the checker has not started work. */
  NOT_STARTED(true),

  /**
   * The checker has acknowledged that it has work to do on the change, and will start work in the
   * future.
   */
  SCHEDULED(true),

  /** The checker is currently running the check. */
  RUNNING(true),

  /** The check terminated and succeeded. */
  SUCCESSFUL(false),

  /** The check is not relevant for the change. */
  NOT_RELEVANT(false);

  private final boolean inProgress;

  CheckState(boolean inProgress) {
    this.inProgress = inProgress;
  }

  /**
   * Returns whether the state represents an in-progress state.
   *
   * <p>A check is in progress if the checker is relevant to the change, and the checker system has
   * not yet completed the check.
   *
   * @return whether the state represents an in-progress state.
   */
  public boolean isInProgress() {
    return inProgress;
  }
}