/**
    * Copyright 2005-2012 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.krad.uif.field;
  
  import org.apache.commons.lang.StringUtils;
  import org.kuali.rice.krad.datadictionary.parse.BeanTag;
  import org.kuali.rice.krad.datadictionary.parse.BeanTagAttribute;
  import org.kuali.rice.krad.datadictionary.validator.ErrorReport;
  import org.kuali.rice.krad.datadictionary.validator.Validator;
  import org.kuali.rice.krad.datadictionary.validator.ValidationTrace;
  import org.kuali.rice.krad.uif.UifConstants;
  import org.kuali.rice.krad.uif.component.Component;
  import org.kuali.rice.krad.uif.container.Container;
  import org.kuali.rice.krad.uif.element.Message;
  import org.kuali.rice.krad.uif.view.View;
  
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * Field wrapper for a Message
   *
   * <p>
   * The <code>Message</code> is used to display static text in the user
   * interface
   * </p>
   *
   * @author Kuali Rice Team (rice.collab@kuali.org)
   */
  @BeanTag(name="messageField")
  public class MessageField extends FieldBase {
      private static final long serialVersionUID = -7045208136391722063L;
  
      private Message message;
  
      public MessageField() {
          super();
      }
  
      /**
       * @see org.kuali.rice.krad.uif.component.ComponentBase#getComponentsForLifecycle()
       */
      @Override
      public List<Component> getComponentsForLifecycle() {
          List<Component> components = super.getComponentsForLifecycle();
  
          components.add(message);
  
          return components;
      }
  
      /**
       * PerformFinalize override - calls super, corrects the field's Label for attribute to point to this field's content
       *
       * @param view the view
       * @param model the model
       * @param parent the parent component
       */
      @Override
      public void performFinalize(View view, Object model, Component parent) {
          super.performFinalize(view, model, parent);
  
          //determine what id to use for the for attribute of the label, if present
          if(this.getFieldLabel() != null && this.getMessage() != null
                  && StringUtils.isNotBlank(this.getMessage().getId())){
  
              if(this.getMessage().getMessageComponentStructure() != null
                      && !this.getMessage().getMessageComponentStructure().isEmpty()){
                  //wrapper will be a rich message div - no suffix
                  this.getFieldLabel().setLabelForComponentId(this.getMessage().getId());
              }
              else{
                  //wrapper will be a normal message span - add suffix
                  this.getFieldLabel().setLabelForComponentId(this.getMessage().getId() + UifConstants.IdSuffixes.SPAN);
              }
          }
      }
  
      /**
       * Convenience method for setting the message text
       *
       * @param messageText - text to display for the message
       */
      @BeanTagAttribute(name="messageText")
      public void setMessageText(String messageText) {
          if (message != null) {
             message.setMessageText(messageText);
         }
     }
 
     /**
      * Nested @{link org.kuali.rice.krad.uif.element.Message} component wrapped in the field
      *
      * @return Message instance
      */
     @BeanTagAttribute(name="message",type= BeanTagAttribute.AttributeType.SINGLEBEAN)
     public Message getMessage() {
         return message;
     }
 
     /**
      * Setter for the nested message instance
      *
      * @param message
      */
     public void setMessage(Message message) {
         this.message = message;
     }
 
     /**
      * @see org.kuali.rice.krad.uif.component.Component#completeValidation
      */
     @Override
     public void completeValidation(ValidationTrace tracer){
         tracer.addBean(this);
 
         // Checks that the message is set
         if(getMessage()==null){
             if(Validator.checkExpressions(this, "message")){
                 String currentValues [] = {"message ="+getMessage()};
                 tracer.createWarning("Message should not be null",currentValues);
             }
         }
 
         // Checks that the label is set
         if(getLabel()==null){
             if(Validator.checkExpressions(this, "label")){
                 String currentValues [] = {"label ="+getLabel(),"Message ="+getMessage()};
                 tracer.createWarning("Label is null, message should be used instead",currentValues);
             }
         }
 
         super.completeValidation(tracer.getCopy());
     }
 }