/*
 * 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.shardingsphere.elasticjob.cloud.scheduler.statistics.job;

import java.util.ArrayList;
import java.util.Collections;
import java.util.Date;
import java.util.List;

import org.apache.shardingsphere.elasticjob.cloud.scheduler.statistics.util.StatisticTimeUtils;
import org.apache.shardingsphere.elasticjob.cloud.statistics.StatisticInterval;

/**
 * Statistic job.
 */
abstract class AbstractStatisticJob implements StatisticJob {
    
    String getJobName() {
        return this.getClass().getSimpleName();
    }
    
    String getTriggerName() {
        return this.getClass().getSimpleName() + "Trigger";
    }
    
    List<Date> findBlankStatisticTimes(final Date latestStatisticTime, final StatisticInterval statisticInterval) {
        List<Date> result = new ArrayList<>();
        int previousInterval = -1;
        Date previousTime = StatisticTimeUtils.getStatisticTime(statisticInterval, previousInterval);
        while (previousTime.after(latestStatisticTime)) {
            result.add(previousTime);
            previousTime = StatisticTimeUtils.getStatisticTime(statisticInterval, --previousInterval);
        }
        Collections.sort(result);
        return result;
    }
}
