/*
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you 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 org.apache.maven.internal.impl.model;
  
  import java.time.Instant;
  import java.time.ZoneId;
  import java.time.format.DateTimeFormatter;
  import java.util.Map;
  import java.util.Properties;
  
  import org.apache.maven.api.Constants;
  import org.apache.maven.api.MonotonicClock;
  
  /**
   * MavenBuildTimestamp
   */
  public class MavenBuildTimestamp {
      // ISO 8601-compliant timestamp for machine readability
      public static final String DEFAULT_BUILD_TIMESTAMP_FORMAT = "yyyy-MM-dd'T'HH:mm:ssXXX";
  
      private final String formattedTimestamp;
  
      public MavenBuildTimestamp() {
          this(MonotonicClock.now());
      }
  
      public MavenBuildTimestamp(Instant time) {
          this(time, DEFAULT_BUILD_TIMESTAMP_FORMAT);
      }
  
      public MavenBuildTimestamp(Instant time, Map<String, String> properties) {
          this(time, properties != null ? properties.get(Constants.MAVEN_BUILD_TIMESTAMP_FORMAT) : null);
      }
  
      /**
       *
       * @deprecated Use {@link #MavenBuildTimestamp(Instant, Map)} or extract the format and pass it
       *             to {@link #MavenBuildTimestamp(Instant, String)} instead.
       */
      @Deprecated
      public MavenBuildTimestamp(Instant time, Properties properties) {
          this(time, properties != null ? properties.getProperty(Constants.MAVEN_BUILD_TIMESTAMP_FORMAT) : null);
      }
  
      public MavenBuildTimestamp(Instant time, String timestampFormat) {
          if (timestampFormat == null) {
              timestampFormat = DEFAULT_BUILD_TIMESTAMP_FORMAT;
          }
          if (time == null) {
              time = MonotonicClock.now();
          }
          DateTimeFormatter formatter =
                  DateTimeFormatter.ofPattern(timestampFormat).withZone(ZoneId.of("UTC"));
          formattedTimestamp = formatter.format(time);
      }
  
      public String formattedTimestamp() {
          return formattedTimestamp;
      }
  }