/*
    * Licensed to The Apereo Foundation under one or more contributor license
    * agreements. See the NOTICE file distributed with this work for additional
    * information regarding copyright ownership.
    *
    *
    * The Apereo Foundation licenses this file to you 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://opensource.org/licenses/ecl2.txt
   *
   * 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.opencastproject.series.impl.persistence;
  
  import org.opencastproject.security.api.User;
  
  import java.util.Collections;
  import java.util.Date;
  import java.util.Map;
  import java.util.TreeMap;
  
  import javax.persistence.Access;
  import javax.persistence.AccessType;
  import javax.persistence.AttributeOverride;
  import javax.persistence.AttributeOverrides;
  import javax.persistence.CollectionTable;
  import javax.persistence.Column;
  import javax.persistence.ElementCollection;
  import javax.persistence.Embedded;
  import javax.persistence.Entity;
  import javax.persistence.GeneratedValue;
  import javax.persistence.GenerationType;
  import javax.persistence.Id;
  import javax.persistence.IdClass;
  import javax.persistence.Index;
  import javax.persistence.JoinColumn;
  import javax.persistence.Lob;
  import javax.persistence.MapKeyColumn;
  import javax.persistence.NamedQueries;
  import javax.persistence.NamedQuery;
  import javax.persistence.Table;
  import javax.persistence.Temporal;
  import javax.persistence.TemporalType;
  import javax.persistence.UniqueConstraint;
  
  /**
   * Enitity object for storing series in persistence storage. Series ID is stored as primary key, DUBLIN_CORE field is
   * used to store serialized Dublin core and ACCESS_CONTROL field is used to store information about access control
   * rules.
   *
   */
  @Entity(name = "SeriesEntity")
  @IdClass(SeriesEntityId.class)
  @Access(AccessType.FIELD)
  @Table(name = "oc_series",
      indexes = {
          @Index(name = "IX_oc_series_modified_date", columnList = ("modified_date")),
      }
  )
  @NamedQueries({
      @NamedQuery(
          name = "Series.findAll",
          query = "select s from SeriesEntity s where s.deletionDate is null"
      ),
      @NamedQuery(
          name = "Series.getCount",
          query = "select COUNT(s) from SeriesEntity s where s.deletionDate is null"
      ),
      @NamedQuery(
          name = "seriesById",
          query = "select s from SeriesEntity as s where s.seriesId=:seriesId and s.organization=:organization"
      ),
      @NamedQuery(
          name = "Series.getAllModifiedSince",
          query = "select s from SeriesEntity as s "
              + "where s.modifiedDate >= :since and s.organization=:organization "
              + "order by s.modifiedDate asc"
      ),
      @NamedQuery(
          name = "Series.getAllModifiedInRange",
          query = "select s from SeriesEntity as s "
              + "where s.modifiedDate >= :from and s.modifiedDate < :to and s.organization=:organization "
              + "order by s.modifiedDate asc"
      ),
  })
  public class SeriesEntity {
  
    /** Series ID, primary key */
    @Id
    @GeneratedValue(strategy = GenerationType.AUTO)
   @Column(name = "id", length = 128)
   protected String seriesId;
 
   /** Series ID, primary key */
   @Id
   @Column(name = "organization", length = 128)
   protected String organization;
 
   /** Serialized Dublin core */
   @Lob
   @Column(name = "dublin_core", length = 65535)
   protected String dublinCoreXML;
 
   /** Serialized access control */
   @Lob
   @Column(name = "access_control", length = 65535)
   protected String accessControl;
 
   @Column(name = "modified_date", nullable = false)
   @Temporal(TemporalType.TIMESTAMP)
   protected Date modifiedDate = new Date();
 
   @Column(name = "deletion_date")
   @Temporal(TemporalType.TIMESTAMP)
   protected Date deletionDate = null;
 
   @Lob
   @ElementCollection(targetClass = String.class)
   @MapKeyColumn(name = "name", nullable = false)
   @Column(name = "\"value\"", length = 65535)
   @CollectionTable(name = "oc_series_property", uniqueConstraints = {
       @UniqueConstraint(name = "UNQ_series_properties", columnNames = {"series", "organization", "name"})
       }, joinColumns = {
           @JoinColumn(name = "series", referencedColumnName = "id", nullable = false),
           @JoinColumn(name = "organization", referencedColumnName = "organization", nullable = false) })
   protected Map<String, String> properties;
 
   @ElementCollection
   @MapKeyColumn(name = "type", length = 128, nullable = false)
   @Column(name = "data")
   @CollectionTable(name = "oc_series_elements", uniqueConstraints = {
       @UniqueConstraint(name = "UNQ_series_elements", columnNames = {"series", "organization", "type"})
       }, joinColumns = {
       @JoinColumn(name = "series", referencedColumnName = "id", nullable = false),
       @JoinColumn(name = "organization", referencedColumnName = "organization", nullable = false) })
   protected Map<String, byte[]> elements;
 
   @Embedded
   @AttributeOverrides({
       @AttributeOverride(name = "username",
           column = @Column(name = "creator_username", length = 128, nullable = false)
       ),
       @AttributeOverride(name = "name",
           column = @Column(name = "creator_name")
       ),
   })
   protected SeriesCreatorEntity creator;
 
   /**
    * Default constructor without any import.
    */
   protected SeriesEntity() {
   }
 
   /**
    * Returns series ID.
    *
    * @return series ID
    */
   public String getSeriesId() {
     return seriesId;
   }
 
   /**
    * Sets series ID. ID length limit is 128 characters.
    *
    * @param seriesId
    */
   public void setSeriesId(String seriesId) {
     if (seriesId == null) {
       throw new IllegalArgumentException("Series id can't be null");
     }
     if (seriesId.length() > 128) {
       throw new IllegalArgumentException("Series id can't be longer than 128 characters");
     }
     this.seriesId = seriesId;
   }
 
   /**
    * Returns serialized Dublin core.
    *
    * @return serialized Dublin core
    */
   public String getDublinCoreXML() {
     return dublinCoreXML;
   }
 
   /**
    * Sets serialized Dublin core.
    *
    * @param dublinCoreXML
    *          serialized Dublin core
    */
   public void setSeries(String dublinCoreXML) {
     this.dublinCoreXML = dublinCoreXML;
   }
 
   /**
    * Returns serialized access control
    *
    * @return serialized access control
    */
   public String getAccessControl() {
     return accessControl;
   }
 
   /**
    * Sets serialized access control.
    *
    * @param accessControl
    *          serialized access control
    */
   public void setAccessControl(String accessControl) {
     this.accessControl = accessControl;
   }
 
   /**
    * @return the organization
    */
   public String getOrganization() {
     return organization;
   }
 
   /**
    * @param organization
    *          the organization to set
    */
   public void setOrganization(String organization) {
     this.organization = organization;
   }
 
   public Date getModifiedDate() {
     return this.modifiedDate;
   }
 
   public void setModifiedDate(Date date) {
     this.modifiedDate = date;
   }
 
   public Date getDeletionDate() {
     return this.deletionDate;
   }
 
   public void setDeletionDate(Date date) {
     this.deletionDate = date;
   }
 
   public boolean isDeleted() {
     return this.deletionDate != null;
   }
 
   public Map<String, String> getProperties() {
     return new TreeMap<String, String>(properties);
   }
 
   public void setProperties(Map<String, String> properties) {
     this.properties = properties;
   }
 
   public Map<String, byte[]> getElements() {
     return Collections.unmodifiableMap(elements);
   }
 
   public void addElement(String type, byte[] data) {
     elements.put(type, data);
   }
 
   public void removeElement(String type) {
     elements.remove(type);
   }
 
   public String getCreatorName() {
     return creator != null ? creator.name() : null;
   }
 
   public void setCreator(User user) {
     this.creator = new SeriesCreatorEntity(user);
   }
 
 }