/*
 * 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.kyuubi.ctl.util

import java.time.{Instant, LocalDateTime, ZoneId}
import java.time.format.DateTimeFormatter

private[ctl] object DateTimeUtils {

  def dateStringToMillis(date: String, format: String): Long = {
    if (date == null) return 0
    val localDateTime = LocalDateTime.parse(date, DateTimeFormatter.ofPattern(format))
    localDateTime.atZone(ZoneId.systemDefault).toInstant.toEpochMilli
  }

  def millisToDateString(millis: Long, format: String): String = {
    if (millis <= 0) {
      "N/A"
    } else {
      val formatter = DateTimeFormatter.ofPattern(format)
      val date: LocalDateTime =
        Instant.ofEpochMilli(millis).atZone(ZoneId.systemDefault()).toLocalDateTime()
      formatter.format(date)
    }
  }
}
