/*
    * Copyright 2012-2025 CodeLibs Project and the Others.
    *
    * 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 org.codelibs.fess.app.service;
  
  import java.util.List;
  
  import org.codelibs.core.beans.util.BeanUtil;
  import org.codelibs.fess.Constants;
  import org.codelibs.fess.app.pager.JobLogPager;
  import org.codelibs.fess.mylasta.direction.FessConfig;
  import org.codelibs.fess.opensearch.config.cbean.JobLogCB;
  import org.codelibs.fess.opensearch.config.exbhv.JobLogBhv;
  import org.codelibs.fess.opensearch.config.exentity.JobLog;
  import org.codelibs.fess.util.ComponentUtil;
  import org.dbflute.cbean.result.PagingResultBean;
  import org.dbflute.optional.OptionalEntity;
  
  import jakarta.annotation.Resource;
  
  /**
   * Service class for managing job logs in the Fess application.
   * Provides functionality to create, read, update, and delete job log entries,
   * as well as manage job status and perform cleanup operations.
   */
  public class JobLogService {
  
      /**
       * Behavior class for job log database operations.
       */
      @Resource
      protected JobLogBhv jobLogBhv;
  
      /**
       * Default constructor.
       */
      public JobLogService() {
          // Default constructor
      }
  
      /**
       * Configuration settings for the Fess application.
       */
      @Resource
      protected FessConfig fessConfig;
  
      /**
       * Time interval in milliseconds after which jobs are considered expired.
       * Default is 2 hours (2 * 60 * 60 * 1000L).
       */
      protected long expiredJobInterval = 2 * 60 * 60 * 1000L; // 2hours
  
      /**
       * Retrieves a paginated list of job logs based on the provided pager configuration.
       *
       * @param jobLogPager the pager configuration for pagination and filtering
       * @return a list of job logs matching the criteria
       */
      public List<JobLog> getJobLogList(final JobLogPager jobLogPager) {
  
          final PagingResultBean<JobLog> jobLogList = jobLogBhv.selectPage(cb -> {
              cb.paging(jobLogPager.getPageSize(), jobLogPager.getCurrentPageNumber());
              setupListCondition(cb, jobLogPager);
          });
  
          // update pager
          BeanUtil.copyBeanToBean(jobLogList, jobLogPager, option -> option.include(Constants.PAGER_CONVERSION_RULE));
          jobLogPager.setPageNumberList(jobLogList.pageRange(op -> {
              op.rangeSize(fessConfig.getPagingPageRangeSizeAsInteger());
          }).createPageNumberList());
  
          return jobLogList;
      }
  
      /**
       * Retrieves a specific job log by its ID.
       *
       * @param id the unique identifier of the job log
       * @return an optional entity containing the job log if found
       */
      public OptionalEntity<JobLog> getJobLog(final String id) {
          return jobLogBhv.selectByPK(id);
      }
  
      /**
       * Stores a job log entry in the database.
       * Performs an insert or update operation based on whether the job log already exists.
      *
      * @param jobLog the job log to store
      */
     public void store(final JobLog jobLog) {
 
         jobLogBhv.insertOrUpdate(jobLog, op -> {
             op.setRefreshPolicy(Constants.TRUE);
         });
 
     }
 
     /**
      * Deletes a specific job log from the database.
      *
      * @param jobLog the job log to delete
      */
     public void delete(final JobLog jobLog) {
 
         jobLogBhv.delete(jobLog, op -> {
             op.setRefreshPolicy(Constants.TRUE);
         });
 
     }
 
     /**
      * Sets up the query conditions for retrieving job logs based on the pager configuration.
      * Configures filtering and ordering for the database query.
      *
      * @param cb the condition bean for building the query
      * @param jobLogPager the pager containing filter and search criteria
      */
     protected void setupListCondition(final JobLogCB cb, final JobLogPager jobLogPager) {
         if (jobLogPager.id != null) {
             cb.query().docMeta().setId_Equal(jobLogPager.id);
         }
         // TODO Long, Integer, String supported only.
 
         // setup condition
         cb.query().addOrderBy_StartTime_Desc();
         cb.query().addOrderBy_EndTime_Desc();
 
         // search
 
     }
 
     /**
      * Deletes job logs that ended before the specified number of days ago.
      * Used for cleaning up old log entries.
      *
      * @param days the number of days to look back from the current time
      */
     public void deleteBefore(final int days) {
         final long oneday = 24 * 60 * 60 * 1000L;
         final long targetTime = ComponentUtil.getSystemHelper().getCurrentTimeAsLong() - days * oneday;
         jobLogBhv.queryDelete(cb -> {
             cb.query().setEndTime_LessThan(targetTime);
         });
     }
 
     /**
      * Deletes job logs that have any of the specified job statuses.
      *
      * @param jobStatusList the list of job statuses to match for deletion
      */
     public void deleteByJobStatus(final List<String> jobStatusList) {
         jobLogBhv.queryDelete(cb -> {
             cb.query().setJobStatus_InScope(jobStatusList);
         });
     }
 
     /**
      * Updates the status of expired jobs that haven't finished.
      * Jobs that have been running longer than the expired job interval
      * without an end time are marked as failed.
      */
     public void updateStatus() {
         final long expiry = ComponentUtil.getSystemHelper().getCurrentTimeAsLong() - expiredJobInterval;
         final List<JobLog> list = jobLogBhv.selectList(cb -> {
             cb.query().bool((must, should, mustNot, filter) -> {
                 must.setLastUpdated_LessEqual(expiry);
                 mustNot.setEndTime_Exists();
             });
         });
         if (!list.isEmpty()) {
             list.forEach(jobLog -> {
                 jobLog.setJobStatus(Constants.FAIL);
                 jobLog.setScriptResult("No response from Job.");
                 jobLog.setEndTime(ComponentUtil.getSystemHelper().getCurrentTimeAsLong());
             });
             jobLogBhv.batchUpdate(list);
         }
     }
 
     /**
      * Sets the time interval after which jobs are considered expired.
      *
      * @param expiredJobInterval the time interval in milliseconds
      */
     public void setExpiredJobInterval(final long expiredJobInterval) {
         this.expiredJobInterval = expiredJobInterval;
     }
 
 }