/**
    * Copyright 2004-2013 The Kuali Foundation
    *
    * Licensed under the Educational Community 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.opensource.org/licenses/ecl2.php
    *
   * 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.kuali.hr.time.task.dao;
  
  import java.sql.Date;
  import java.util.ArrayList;
  import java.util.List;
  
  import com.google.common.collect.ImmutableList;
  import org.apache.commons.lang.StringUtils;
  import org.apache.ojb.broker.query.Criteria;
  import org.apache.ojb.broker.query.Query;
  import org.apache.ojb.broker.query.QueryFactory;
  import org.apache.ojb.broker.query.ReportQueryByCriteria;
  import org.kuali.hr.core.util.OjbSubQueryUtil;
  import org.kuali.hr.time.task.Task;
  import org.kuali.hr.time.util.TKUtils;
  import org.kuali.rice.core.framework.persistence.ojb.dao.PlatformAwareDaoBaseOjb;
  
  public class TaskDaoSpringOjbImpl extends PlatformAwareDaoBaseOjb implements TaskDao {
      private static final ImmutableList<String> EQUAL_TO_FIELDS = new ImmutableList.Builder<String>()
              .add("task")
              .build();
  
  	@Override
  	public Task getTask(String tkTaskId) {
  		Criteria crit = new Criteria();
  		crit.addEqualTo("tkTaskId", tkTaskId);
  		
  		Query query = QueryFactory.newQuery(Task.class, crit);
  		return (Task)this.getPersistenceBrokerTemplate().getObjectByQuery(query);
  	}
  
      @Override
      public Task getMaxTask() {
          Criteria root = new Criteria();
          Criteria crit = new Criteria();
  
          ReportQueryByCriteria taskNumberSubQuery = QueryFactory.newReportQuery(Task.class, crit);
          taskNumberSubQuery.setAttributes(new String[]{"max(task)"});
  
          root.addEqualTo("task", taskNumberSubQuery);
  
          Query query = QueryFactory.newQuery(Task.class, root);
          return (Task) this.getPersistenceBrokerTemplate().getObjectByQuery(query);
      }
  
      @Override
      public Task getTask(Long task, Date asOfDate) {
          Criteria root = new Criteria();
  
          root.addEqualTo("task", task);
          root.addEqualTo("effectiveDate", OjbSubQueryUtil.getEffectiveDateSubQuery(Task.class, asOfDate, EQUAL_TO_FIELDS, false));
          root.addEqualTo("timestamp", OjbSubQueryUtil.getTimestampSubQuery(Task.class, EQUAL_TO_FIELDS, false));
  
          Criteria activeFilter = new Criteria(); // Inner Join For Activity
          activeFilter.addEqualTo("active", true);
          root.addAndCriteria(activeFilter);
  
          Task t = null;
          Query query = QueryFactory.newQuery(Task.class, root);
          Object obj = this.getPersistenceBrokerTemplate().getObjectByQuery(query);
          if (obj instanceof Task)
              t = (Task) obj;
  
          return t;
      }
  
      @Override
      public void saveOrUpdate(Task task) {
          this.getPersistenceBrokerTemplate().store(task);
      }
  
      @Override
      public void saveOrUpdate(List<Task> tasks) {
          for (Task task : tasks)
              this.getPersistenceBrokerTemplate().store(task);
      }
  
      @SuppressWarnings("unchecked")
  	@Override
      public List<Task> getTasks(Long task, String description, Long workArea, Date fromEffdt, Date toEffdt) {
          Criteria root = new Criteria();
  
          List<Task> results = new ArrayList<Task>();
  
         if (task != null) {
         	root.addLike("task", task);
         }
         
         if (StringUtils.isNotBlank(description)) {
         	root.addLike("description", description);
         }
         
         if (workArea != null) {
         	root.addEqualTo("workArea", workArea);
         }
         
         Criteria effectiveDateFilter = new Criteria();
         if (fromEffdt != null) {
             effectiveDateFilter.addGreaterOrEqualThan("effectiveDate", fromEffdt);
         }
         if (toEffdt != null) {
             effectiveDateFilter.addLessOrEqualThan("effectiveDate", toEffdt);
         }
         if (fromEffdt == null && toEffdt == null) {
             effectiveDateFilter.addLessOrEqualThan("effectiveDate", TKUtils.getCurrentDate());
         }
         root.addAndCriteria(effectiveDateFilter);
 
         Criteria activeFilter = new Criteria();
         activeFilter.addEqualTo("active", true);
         root.addAndCriteria(activeFilter);
 
         root.addEqualTo("effectiveDate", OjbSubQueryUtil.getEffectiveDateSubQueryWithFilter(Task.class, effectiveDateFilter, EQUAL_TO_FIELDS, false));
         root.addEqualTo("timestamp", OjbSubQueryUtil.getTimestampSubQuery(Task.class, EQUAL_TO_FIELDS, false));
 
         Query query = QueryFactory.newQuery(Task.class, root);
         results.addAll(getPersistenceBrokerTemplate().getCollectionByQuery(query));
 
         return results;
     }
    
     @Override
     public int getTaskCount(Long task) {
     	Criteria crit = new Criteria();
 		crit.addEqualTo("task",task);
 		Query query = QueryFactory.newQuery(Task.class, crit);
 		return this.getPersistenceBrokerTemplate().getCount(query);
     }
 }