/*
 * Copyright © 2024 Apple Inc. and the Pkl project authors. All rights reserved.
 *
 * 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
 *
 *     https://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 org.pkl.core.util;

public final class Exceptions {
  private Exceptions() {}

  public static Throwable getRootCause(Throwable t) {
    var result = t;
    while (result.getCause() != null) {
      result = result.getCause();
    }
    return result;
  }

  public static String getRootReason(Throwable t) {
    var reason = getRootCause(t).getMessage();
    if (reason == null || reason.isEmpty()) reason = "(unknown reason)";
    return reason;
  }
}
