/*
    * 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.workflow.api;
  
  import org.apache.commons.lang3.StringUtils;
  
  import java.util.ArrayList;
  import java.util.Collection;
  import java.util.Collections;
  import java.util.HashSet;
  import java.util.List;
  import java.util.Set;
  import java.util.SortedSet;
  import java.util.TreeSet;
  
  import javax.xml.bind.annotation.XmlAccessType;
  import javax.xml.bind.annotation.XmlAccessorType;
  import javax.xml.bind.annotation.XmlElement;
  import javax.xml.bind.annotation.XmlElementWrapper;
  import javax.xml.bind.annotation.XmlID;
  import javax.xml.bind.annotation.XmlRootElement;
  import javax.xml.bind.annotation.XmlType;
  import javax.xml.bind.annotation.adapters.XmlAdapter;
  
  /**
   * A JAXB-annotated implementation of {@link WorkflowDefinition}
   */
  @XmlType(name = "definition", namespace = "http://workflow.opencastproject.org")
  @XmlRootElement(name = "definition", namespace = "http://workflow.opencastproject.org")
  @XmlAccessorType(XmlAccessType.FIELD)
  public class WorkflowDefinitionImpl implements WorkflowDefinition {
  
    /**
     * Constructor to be used by JAXB only.
     */
    public WorkflowDefinitionImpl() {
    }
  
    @XmlID
    @XmlElement(name = "id")
    private String id;
  
    @XmlElement(name = "title")
    private String title;
  
    @XmlElement(name = "organization")
    private String organization;
  
    @XmlElementWrapper(name = "tags")
    @XmlElement(name = "tag")
    protected SortedSet<String> tags = new TreeSet<>();
  
    @XmlElementWrapper(name = "roles")
    @XmlElement(name = "role")
    protected SortedSet<String> roles = new TreeSet<>();
  
    @XmlElement(name = "description")
    private String description;
  
    @XmlElement(name = "displayOrder")
    private int displayOrder = 0;
  
    @XmlElement(name = "configuration_panel")
    private String configurationPanel;
  
    @XmlElement(name = "configuration_panel_json")
    private String configurationPanelJson;
  
    @XmlElement(name = "operation")
    @XmlElementWrapper(name = "operations")
    private List<WorkflowOperationDefinition> operations;
  
    @XmlElement(name = "state-mapping")
    @XmlElementWrapper(name = "state-mappings")
    private Set<WorkflowStateMapping> stateMappings;
  
    /**
     * {@inheritDoc}
     *
     * @see org.opencastproject.workflow.api.WorkflowDefinition#getId()
    */
   public String getId() {
     return id;
   }
 
   /**
    * {@inheritDoc}
    *
    * @see org.opencastproject.workflow.api.WorkflowDefinition#setId(java.lang.String)
    */
   public void setId(String id) {
     this.id = id;
   }
 
   /**
    * {@inheritDoc}
    *
    * @see org.opencastproject.workflow.api.WorkflowDefinition#getDescription()
    */
   public String getDescription() {
     return description;
   }
 
   /**
    * {@inheritDoc}
    *
    * @see org.opencastproject.workflow.api.WorkflowDefinition#setDescription(java.lang.String)
    */
   public void setDescription(String description) {
     this.description = description;
   }
 
   /**
    * {@inheritDoc}
    *
    * @see org.opencastproject.workflow.api.WorkflowDefinition#getDisplayOrder()
    */
   public int getDisplayOrder() {
     return displayOrder;
   }
 
   /**
    * {@inheritDoc}
    *
    * @see org.opencastproject.workflow.api.WorkflowDefinition#setDisplayOrder(int)
    */
   public void setDisplayOrder(int displayOrder) {
     this.displayOrder = displayOrder;
   }
 
   /**
    * Sets the configuration panel for this workflow.
    *
    * @param panelXML
    *          the xml for the configuration panel
    */
   public void setConfigurationPanel(String panelXML) {
     this.configurationPanel = panelXML;
   }
 
   /**
    * {@inheritDoc}
    *
    * @see org.opencastproject.workflow.api.WorkflowDefinition#getConfigurationPanel()
    */
   public String getConfigurationPanel() {
     return this.configurationPanel;
   }
 
   /**
    * Sets the configuration panel for this workflow.
    *
    * @param panelJson
    *          the json for the configuration panel
    */
   public void setConfigurationPanelJson(String panelJson) {
     this.configurationPanelJson = panelJson;
   }
 
   /**
    * {@inheritDoc}
    *
    * @see org.opencastproject.workflow.api.WorkflowDefinition#getConfigurationPanelJson()
    */
   public String getConfigurationPanelJson() {
     return this.configurationPanelJson;
   }
 
   /**
    * {@inheritDoc}
    *
    * @see org.opencastproject.workflow.api.WorkflowDefinition#getOperations()
    */
   public List<WorkflowOperationDefinition> getOperations() {
     if (operations == null)
       operations = new ArrayList<>();
     return operations;
   }
 
   @Override
   public Set<WorkflowStateMapping> getStateMappings() {
     if (stateMappings == null) {
       stateMappings = new HashSet<>();
     }
     return stateMappings;
   }
 
   /**
    * {@inheritDoc}
    *
    * @see org.opencastproject.workflow.api.WorkflowDefinition#get(int)
    */
   @Override
   public WorkflowOperationDefinition get(int position) throws IndexOutOfBoundsException {
     if (operations == null)
       operations = new ArrayList<>();
     if (position < 0 || position >= operations.size())
       throw new IndexOutOfBoundsException();
     return operations.get(position);
   }
 
   /**
    * {@inheritDoc}
    *
    * @see org.opencastproject.workflow.api.WorkflowDefinition#add(org.opencastproject.workflow.api.WorkflowOperationDefinition)
    */
   @Override
   public void add(WorkflowOperationDefinition operation) {
     if (operations == null)
       operations = new ArrayList<>();
     add(operation, this.operations.size());
   }
 
   /**
    * {@inheritDoc}
    *
    * @see org.opencastproject.workflow.api.WorkflowDefinition#add(org.opencastproject.workflow.api.WorkflowOperationDefinition,
    *      int)
    */
   @Override
   public void add(WorkflowOperationDefinition operation, int position) {
     if (operations == null)
       operations = new ArrayList<>();
 
     if (operation == null)
       throw new IllegalArgumentException("Workflow operation cannot be null");
     if (position < 0 || position > operations.size())
       throw new IndexOutOfBoundsException();
 
     if (position == operations.size())
       operations.add(operation);
     else
       operations.add(position, operation);
   }
 
   /**
    * {@inheritDoc}
    *
    * @see org.opencastproject.workflow.api.WorkflowDefinition#remove(int)
    */
   @Override
   public WorkflowOperationDefinition remove(int position) throws IndexOutOfBoundsException {
     if (operations == null)
       operations = new ArrayList<>();
     return operations.remove(position);
   }
 
   /**
    * @see org.opencastproject.workflow.api.WorkflowDefinition#addTag(String)
    */
   @Override
   public void addTag(String tag) {
     if (tag == null)
       throw new IllegalArgumentException("Tag must not be null");
     tags.add(tag);
   }
 
   /**
    * @see org.opencastproject.workflow.api.WorkflowDefinition#removeTag(String)
    */
   @Override
   public void removeTag(String tag) {
     if (tag == null)
       return;
     tags.remove(tag);
   }
 
   /**
    * @see org.opencastproject.workflow.api.WorkflowDefinition#containsTag(String)
    */
   @Override
   public boolean containsTag(String tag) {
     if (tag == null || tags == null)
       return false;
     return tags.contains(tag);
   }
 
   /**
    * @see org.opencastproject.workflow.api.WorkflowDefinition#containsTag(Collection)
    */
   @Override
   public boolean containsTag(Collection<String> tags) {
     if (tags.size() == 0)
       return true;
     for (String tag : tags) {
       if (containsTag(tag))
         return true;
     }
     return false;
   }
 
   /**
    * @see org.opencastproject.workflow.api.WorkflowDefinition#getTags()
    */
   @Override
   public String[] getTags() {
     return tags.toArray(new String[0]);
   }
 
   /**
    * @see org.opencastproject.workflow.api.WorkflowDefinition#clearTags()
    */
   @Override
   public void clearTags() {
     if (tags != null)
       tags.clear();
   }
 
   /**
    * Since we are posting workflow definitions as one post parameter in a multi-parameter post, we can not rely on
    * "automatic" JAXB deserialization. We therefore need to provide a static valueOf(String) method to transform an XML
    * string into a WorkflowDefinition.
    *
    * @param xmlString
    *          The xml describing the workflow
    * @return A {@link WorkflowDefinitionImpl} instance based on xmlString
    * @throws Exception
    *           If there is a problem marshalling the {@link WorkflowDefinitionImpl} from XML.
    */
   public static WorkflowDefinitionImpl valueOf(String xmlString) throws Exception {
     return (WorkflowDefinitionImpl) XmlWorkflowParser.parseWorkflowDefinition(xmlString);
   }
 
   @Override
   public int compareTo(WorkflowDefinition workflowDefinition) {
 
     if (workflowDefinition == null) {
       throw new NullPointerException("WorkflowDefinition for comparison can't be null");
     }
 
     // nullsafe comparison where null is lesser than non-null
     // workflows with null title probably aren't for displaying anyway
     return StringUtils.compareIgnoreCase(this.getTitle(), workflowDefinition.getTitle());
   }
 
   static class Adapter extends XmlAdapter<WorkflowDefinitionImpl, WorkflowDefinition> {
     public WorkflowDefinitionImpl marshal(WorkflowDefinition op) {
       return (WorkflowDefinitionImpl) op;
     }
 
     public WorkflowDefinition unmarshal(WorkflowDefinitionImpl op) {
       return op;
     }
   }
 
   /**
    * @return the title
    */
   public String getTitle() {
     return title;
   }
 
   /**
    * @param title
    *          the title to set
    */
   public void setTitle(String title) {
     this.title = title;
   }
 
   @Override
   public String getOrganization() {
     return organization;
   }
 
   @Override
   public Collection<String> getRoles() {
     if (roles == null) {
       return Collections.emptySet();
     }
     return roles;
   }
 
   /**
    * {@inheritDoc}
    *
    * @see java.lang.Object#toString()
    */
   public String toString() {
     if (organization != null) {
       return "Workflow definition {" + id + "/" + organization + "}";
     }
     return "Workflow definition {" + id + "}";
   }
 
 }