/**
    * Copyright 2005-2011 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.rice.kew.engine.node;
  
  import java.io.Serializable;
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Map;
  
  import javax.persistence.CascadeType;
  import javax.persistence.Column;
  import javax.persistence.Entity;
  import javax.persistence.FetchType;
  import javax.persistence.GeneratedValue;
  import javax.persistence.Id;
  import javax.persistence.JoinColumn;
  import javax.persistence.JoinTable;
  import javax.persistence.ManyToMany;
  import javax.persistence.ManyToOne;
  import javax.persistence.NamedQueries;
  import javax.persistence.NamedQuery;
  import javax.persistence.OneToMany;
  import javax.persistence.OneToOne;
  import javax.persistence.Table;
  import javax.persistence.Transient;
  import javax.persistence.Version;
  
  import org.apache.commons.lang.StringUtils;
  import org.apache.log4j.Logger;
  import org.hibernate.annotations.Fetch;
  import org.hibernate.annotations.FetchMode;
  import org.hibernate.annotations.GenericGenerator;
  import org.hibernate.annotations.Parameter;
  import org.kuali.rice.core.framework.persistence.jpa.OrmUtils;
  import org.kuali.rice.kew.api.doctype.RouteNodeConfigurationParameterContract;
  import org.kuali.rice.kew.api.doctype.RouteNodeContract;
  import org.kuali.rice.kew.api.exception.ResourceUnavailableException;
  import org.kuali.rice.kew.doctype.bo.DocumentType;
  import org.kuali.rice.kew.rule.bo.RuleTemplateBo;
  import org.kuali.rice.kew.rule.service.RuleTemplateService;
  import org.kuali.rice.kew.service.KEWServiceLocator;
  import org.kuali.rice.kew.api.KewApiConstants;
  import org.kuali.rice.kew.util.Utilities;
  import org.kuali.rice.kim.api.group.Group;
  import org.kuali.rice.kim.api.services.KimApiServiceLocator;
  
  /**
   * Represents the prototype definition of a node in the route path of {@link DocumentType}.
   *
   * @author Kuali Rice Team (rice.collab@kuali.org)
   */
  @Entity
  @Table(name="KREW_RTE_NODE_T")
  //@Sequence(name="KREW_RTE_NODE_S", property="routeNodeId")
  @NamedQueries({
  	@NamedQuery(name="RouteNode.FindByRouteNodeId",query="select r from RouteNode as r where r.routeNodeId = :routeNodeId"),
  	@NamedQuery(name="RouteNode.FindRouteNodeByName", query="select r from RouteNode as r where r.routeNodeName = :routeNodeName and r.documentTypeId = :documentTypeId"),
  	@NamedQuery(name="RouteNode.FindApprovalRouteNodes", query="select r from RouteNode as r where r.documentTypeId = :documentTypeId and r.finalApprovalInd = :finalApprovalInd")
  })
  public class RouteNode implements Serializable, RouteNodeContract {    
  
      private static final long serialVersionUID = 4891233177051752726L;
  
      public static final String CONTENT_FRAGMENT_CFG_KEY = "contentFragment";
      public static final String RULE_SELECTOR_CFG_KEY = "ruleSelector";
  
      @Id
      @GeneratedValue(generator="KREW_RTE_NODE_S")
  	@GenericGenerator(name="KREW_RTE_NODE_S",strategy="org.hibernate.id.enhanced.SequenceStyleGenerator",parameters={
  			@Parameter(name="sequence_name",value="KREW_RTE_NODE_S"),
  			@Parameter(name="value_column",value="id")
  	})
  	@Column(name="RTE_NODE_ID")
  	private String routeNodeId;
      @Column(name="DOC_TYP_ID",insertable=false, updatable=false)
  	private String documentTypeId;
      @Column(name="NM")
  	private String routeNodeName;
      @Column(name="RTE_MTHD_NM")
  	private String routeMethodName;
      @Column(name="FNL_APRVR_IND")
  	private Boolean finalApprovalInd;
      @Column(name="MNDTRY_RTE_IND")
  	private Boolean mandatoryRouteInd;
      @Column(name="GRP_ID")
  	private String exceptionWorkgroupId;
     @Column(name="RTE_MTHD_CD")
 	private String routeMethodCode;
     @Column(name="ACTVN_TYP")
     private String activationType = ActivationTypeEnum.PARALLEL.getCode();
     
     /**
      * The nextDocStatus property represents the value of the ApplicationDocumentStatus to be set 
      * in the RouteHeader upon transitioning from this node.
      */
     @Column(name="NEXT_DOC_STAT")
 	private String nextDocStatus;
 
     @Version
 	@Column(name="VER_NBR")
 	private Integer lockVerNbr;
     @ManyToOne(fetch=FetchType.EAGER)
 	@JoinColumn(name="DOC_TYP_ID")
 	private DocumentType documentType;
     @Transient
     private String exceptionWorkgroupName;
 
     @Transient
     private RuleTemplateBo ruleTemplate;
     @Column(name="TYP")
     private String nodeType = RequestsNode.class.getName();
     
     //@ManyToMany(fetch = FetchType.LAZY, cascade = {CascadeType.PERSIST}, mappedBy="nextNodes")
     @ManyToMany(fetch = FetchType.EAGER, cascade = {CascadeType.PERSIST}, mappedBy="nextNodes")
     @Fetch(value = FetchMode.SELECT)
     //@JoinTable(name = "KREW_RTE_NODE_LNK_T", joinColumns = @JoinColumn(name = "TO_RTE_NODE_ID"), inverseJoinColumns = @JoinColumn(name = "FROM_RTE_NODE_ID"))
     private List<RouteNode> previousNodes = new ArrayList<RouteNode>();
     //@ManyToMany(fetch = FetchType.LAZY, cascade = {CascadeType.PERSIST})
     @ManyToMany(fetch = FetchType.EAGER, cascade = {CascadeType.PERSIST})
     @Fetch(value = FetchMode.SELECT)
     @JoinTable(name = "KREW_RTE_NODE_LNK_T", joinColumns = @JoinColumn(name = "FROM_RTE_NODE_ID"), inverseJoinColumns = @JoinColumn(name = "TO_RTE_NODE_ID"))
     private List<RouteNode> nextNodes = new ArrayList<RouteNode>();
     @OneToOne(fetch=FetchType.EAGER, cascade={CascadeType.PERSIST, CascadeType.MERGE})
 	@JoinColumn(name="BRCH_PROTO_ID")
 	private BranchPrototype branch;
     @OneToMany(fetch=FetchType.EAGER,mappedBy="routeNode",cascade = {CascadeType.PERSIST, CascadeType.MERGE, CascadeType.REMOVE})
     @Fetch(value = FetchMode.SELECT)
     private List<RouteNodeConfigParam> configParams  = new ArrayList<RouteNodeConfigParam>(0);
 
     /**
      * Looks up a config parameter for this route node definition
      * @param key the config param key 
      * @return the RouteNodeConfigParam if present
      */
     protected RouteNodeConfigParam getConfigParam(String key) {
         Map<String, RouteNodeConfigParam> configParamMap = Utilities.getKeyValueCollectionAsLookupTable(configParams);
         return configParamMap.get(key);
     }
 
     /**
      * Sets a config parameter for this route node definition.  If the key already exists
      * the existing RouteNodeConfigParam is modified, otherwise a new one is created
      * @param key the key of the parameter to set
      * @param value the value to set
      */
     protected void setConfigParam(String key, String value) {
         Map<String, RouteNodeConfigParam> configParamMap = Utilities.getKeyValueCollectionAsLookupTable(configParams);
         RouteNodeConfigParam cfCfgParam = configParamMap.get(key);
         if (cfCfgParam == null) {
             cfCfgParam = new RouteNodeConfigParam(this, key, value);
             configParams.add(cfCfgParam);
         } else {
             cfCfgParam.setValue(value);
         }
     }
 
     public List<RouteNodeConfigParam> getConfigParams() {
         return configParams;
     }
 
     public void setConfigParams(List<RouteNodeConfigParam> configParams) {
         this.configParams = configParams;
     }
 
     /**
      * @return the RouteNodeConfigParam value under the 'contentFragment'  key
      */
     public String getContentFragment() {
         RouteNodeConfigParam cfCfgParam = getConfigParam(CONTENT_FRAGMENT_CFG_KEY);
         if (cfCfgParam == null) return null;
         return cfCfgParam.getValue();
     }
 
     /**
      * @param contentFragment the content fragment of the node, which will be set as a RouteNodeConfigParam under the 'contentFragment' key
      */
     public void setContentFragment(String contentFragment) {
         setConfigParam(CONTENT_FRAGMENT_CFG_KEY, contentFragment);
     }
 
     public String getActivationType() {
         return activationType;
     }
 
     public void setActivationType(String activationType) {
         /* Cleanse the input.
          * This is surely not the best way to validate the activation types;
          * it would probably be better to use typesafe enums accross the board
          * but that would probably entail refactoring large swaths of code, not
          * to mention reconfiguring OJB (can typesafe enums be used?) and dealing
          * with serialization compatibility issues (if any).
          * So instead, let's just be sure to fail-fast.
          */
         ActivationTypeEnum at = ActivationTypeEnum.lookupCode(activationType);
         this.activationType = at.getCode();
     }
 
     public Group getExceptionWorkgroup() {
     	if (!StringUtils.isBlank(exceptionWorkgroupId)) {
     		return KimApiServiceLocator.getGroupService().getGroup(exceptionWorkgroupId);
     	}
     	return null;
     }
     
     public boolean isExceptionGroupDefined() {
     	return getExceptionWorkgroupId() != null;
     }
 
     public String getExceptionWorkgroupId() {
         return exceptionWorkgroupId;
     }
 
     public void setExceptionWorkgroupId(String workgroupId) {
         this.exceptionWorkgroupId = workgroupId;
     }
 
     public void setFinalApprovalInd(Boolean finalApprovalInd) {
         this.finalApprovalInd = finalApprovalInd;
     }
 
     public void setMandatoryRouteInd(Boolean mandatoryRouteInd) {
         this.mandatoryRouteInd = mandatoryRouteInd;
     }
 
     public String getRouteMethodName() {
         return routeMethodName;
     }
 
     public void setRouteMethodName(String routeMethodName) {
         this.routeMethodName = routeMethodName;
     }
 
     public String getDocumentTypeId() {
         return documentTypeId;
     }
 
     public void setDocumentTypeId(String documentTypeId) {
         this.documentTypeId = documentTypeId;
     }
 
     public String getRouteNodeId() {
         return routeNodeId;
     }
 
     public void setRouteNodeId(String routeNodeId) {
         this.routeNodeId = routeNodeId;
     }
 
     public String getRouteNodeName() {
         return routeNodeName;
     }
 
     public void setRouteNodeName(String routeLevelName) {
         this.routeNodeName = routeLevelName;
     }
 
     public DocumentType getDocumentType() {
         return documentType;
     }
 
     public void setDocumentType(DocumentType documentType) {
         this.documentType = documentType;
     }
 
     public String getRouteMethodCode() {
         return routeMethodCode;
     }
 
     public void setRouteMethodCode(String routeMethodCode) {
         this.routeMethodCode = routeMethodCode;
     }
 
 	/**
 	 * @param nextDocStatus the nextDocStatus to set
 	 */
 	public void setNextDocStatus(String nextDocStatus) {
 		this.nextDocStatus = nextDocStatus;
 	}
 
 	/**
 	 * @return the nextDocStatus
 	 */
 	public String getNextDocStatus() {
 		return nextDocStatus;
 	}
 	
     public String getExceptionWorkgroupName() {
     	Group exceptionGroup = getExceptionWorkgroup();
         if (exceptionWorkgroupName == null || exceptionWorkgroupName.equals("")) {
             if (exceptionGroup != null) {
                 return exceptionGroup.getName();
             }
         }
         return exceptionWorkgroupName;
     }
 
     public void setExceptionWorkgroupName(String exceptionWorkgroupName) {
         this.exceptionWorkgroupName = exceptionWorkgroupName;
     }
 
     public Integer getLockVerNbr() {
         return lockVerNbr;
     }
 
     public void setLockVerNbr(Integer lockVerNbr) {
         this.lockVerNbr = lockVerNbr;
     }
 
     public boolean isFlexRM() {
         return routeMethodCode != null && routeMethodCode.equals(KewApiConstants.ROUTE_LEVEL_FLEX_RM);
     }
 
     public boolean isRulesEngineNode() {
         return StringUtils.equals(routeMethodCode, KewApiConstants.ROUTE_LEVEL_RULES_ENGINE);
     }
 
     public boolean isPeopleFlowNode() {
         return StringUtils.equals(routeMethodCode, KewApiConstants.ROUTE_LEVEL_PEOPLE_FLOW);
     }
     
     public boolean isRoleNode() {
     	try {
     		return nodeType != null && NodeType.fromNode(this).isTypeOf(NodeType.ROLE);
     	} catch( ResourceUnavailableException ex ) {
     		Logger.getLogger( RouteNode.class ).info( "isRoleNode(): Unable to determine node type: " + ex.getMessage() );
     		return false;
     	}
     }
 
     public Boolean getFinalApprovalInd() {
         return finalApprovalInd;
     }
 
     public Boolean getMandatoryRouteInd() {
         return mandatoryRouteInd;
     }
 
     public void addNextNode(RouteNode nextNode) {
         getNextNodes().add(nextNode);
         nextNode.getPreviousNodes().add(this);
     }
 
     public List<RouteNode> getNextNodes() {
         return nextNodes;
     }
 
     public void setNextNodes(List<RouteNode> nextNodes) {
         this.nextNodes = nextNodes;
     }
 
     public List<RouteNode> getPreviousNodes() {
         return previousNodes;
     }
 
     public void setPreviousNodes(List<RouteNode> parentNodes) {
         this.previousNodes = parentNodes;
     }
 
     public RuleTemplateBo getRuleTemplate() {
         if (ruleTemplate == null) {
             RuleTemplateService ruleTemplateService = (RuleTemplateService) KEWServiceLocator.getService(KEWServiceLocator.RULE_TEMPLATE_SERVICE);
             ruleTemplate = ruleTemplateService.findByRuleTemplateName(getRouteMethodName());
         }
         return ruleTemplate;
     }
 
     public String getNodeType() {
         return nodeType;
     }
 
     public void setNodeType(String nodeType) {
         this.nodeType = nodeType;
     }
 
     public BranchPrototype getBranch() {
         return branch;
     }
 
     public void setBranch(BranchPrototype branch) {
         this.branch = branch;
     }
 
 	//@PrePersist
 	public void beforeInsert(){
 		OrmUtils.populateAutoIncValue(this, KEWServiceLocator.getEntityManagerFactory().createEntityManager());
 	}
 	
 	/**
 	 * This overridden method ...
 	 * 
 	 * @see java.lang.Object#toString()
 	 */
 	@Override
 	public String toString() {
 		return "RouteNode[routeNodeName="+routeNodeName+", nodeType="+nodeType+", activationType="+activationType+"]";
 	}
 
     @Override
     public Long getVersionNumber() {
         if (lockVerNbr == null) {
             return null;
         }
         return Long.valueOf(lockVerNbr.longValue());
     }
 
     @Override
     public String getId() {
         if (routeNodeId == null) {
             return null;
         }
         return routeNodeId.toString();
     }
 
     @Override
     public String getName() {
         return getRouteNodeName();
     }
 
     @Override
     public boolean isFinalApproval() {
         if (finalApprovalInd == null) {
             return false;
         }
         return finalApprovalInd.booleanValue();
     }
 
     @Override
     public boolean isMandatory() {
         if (mandatoryRouteInd == null) {
             return false;
         }
         return mandatoryRouteInd.booleanValue();
     }
 
     @Override
     public String getExceptionGroupId() {
         return exceptionWorkgroupId;
     }
 
     @Override
     public String getType() {
         return nodeType;
     }
 
     @Override
     public String getBranchName() {
         if (branch == null) {
             return null;
         }
         return branch.getName();
     }
 
     @Override
     public String getNextDocumentStatus() {
         return nextDocStatus;
     }
 
     @Override
     public List<? extends RouteNodeConfigurationParameterContract> getConfigurationParameters() {
         return configParams;
     }
 
     @Override
     public List<String> getPreviousNodeIds() {
         List<String> previousNodeIds = new ArrayList<String>();
         if (previousNodes != null) {
             for (RouteNode previousNode : previousNodes) {
                 previousNodeIds.add(previousNode.getRouteNodeId().toString());
             }
         }
         return previousNodeIds;
     }
 
     @Override
     public List<String> getNextNodeIds() {
         List<String> nextNodeIds = new ArrayList<String>();
         if (nextNodeIds != null) {
             for (RouteNode nextNode : nextNodes) {
                 nextNodeIds.add(nextNode.getRouteNodeId().toString());
             }
         }
         return nextNodeIds;
     }
 	
 	
 
 }