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/*
 * Copyright contributors to the StreamSets project
 * StreamSets Inc., an IBM Company 2024
 *
 * 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.streamsets.pipeline.api.ext.json.delegate;

import com.streamsets.pipeline.api.ext.json.JsonDelegate;
import com.streamsets.pipeline.api.ext.json.JsonRule;

import java.time.ZonedDateTime;
import java.time.format.DateTimeFormatter;
import java.util.Map;

/**
 * JSON Delegate used to produce Human-readable strings from ZonedDateTime objects.
 */
public class ZonedDateTimeDelegate implements JsonDelegate {

  private final JsonRule annotation;

  public ZonedDateTimeDelegate(JsonRule annotation) {
    this.annotation = annotation;
  }

  @Override
  public JsonRule annotation() {
    return this.annotation;
  }

  @Override
  public String serialize(ZonedDateTime value, Map options) {
    return value == null ? null : getFormatter(options).format(value);
  }

  @Override
  public ZonedDateTime deserialize(String value, Map options) {
    return ZonedDateTime.parse(value, getFormatter(options));
  }

  private final DateTimeFormatter getFormatter(Map options) {
    DateTimeFormatter formatter;
    if (isEmpty(annotation.pattern())) {
      String pattern = getPattern(options);
      formatter = pattern == null ? DateTimeFormatter.ISO_DATE_TIME : DateTimeFormatter.ofPattern(pattern);
    } else {
      formatter = DateTimeFormatter.ofPattern(annotation.pattern());
    }
    return formatter;
  }

}