/**
    * Copyright 2005-2014 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.control;
  
  import org.apache.commons.lang.ObjectUtils;
  import org.kuali.rice.core.api.util.AbstractKeyValue;
  import org.kuali.rice.core.api.util.KeyValue;
  import org.kuali.rice.krad.datadictionary.parse.BeanTagAttribute;
  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.field.InputField;
  import org.kuali.rice.krad.uif.lifecycle.ViewLifecycle;
  import org.kuali.rice.krad.uif.util.ComponentFactory;
  import org.kuali.rice.krad.uif.util.ComponentUtils;
  import org.kuali.rice.krad.uif.util.KeyMessage;
  import org.kuali.rice.krad.uif.util.LifecycleElement;
  import org.kuali.rice.krad.uif.util.UifKeyValueLocation;
  import org.kuali.rice.krad.uif.util.UifOptionGroupLabel;
  import org.kuali.rice.krad.uif.util.UrlInfo;
  import org.kuali.rice.krad.uif.view.ExpressionEvaluator;
  import org.kuali.rice.krad.uif.view.View;
  
  import java.util.ArrayList;
  import java.util.List;
  
  /**
   * Base class for controls that accept/display multiple values
   *
   * @author Kuali Rice Team (rice.collab@kuali.org)
   */
  public abstract class MultiValueControlBase extends ControlBase implements MultiValueControl {
      private static final long serialVersionUID = -8691367056245775455L;
  
      private List<KeyValue> options;
      private List<KeyMessage> richOptions;
      private List<Component> inlineComponents;
  
      private List<Message> internalMessageComponents;
  
      private boolean locationSelect = false;
  
      public MultiValueControlBase() {
          super();
      }
  
      /**
       * Process rich message content that may be in the options, by creating and initializing the richOptions
       *
       * {@inheritDoc}
       */
      @Override
      public void performApplyModel(Object model, LifecycleElement parent) {
          super.performApplyModel(model, parent);
          getStyleClassesAsString();
          if (options != null && richOptions == null) {
              richOptions = new ArrayList<KeyMessage>();
              internalMessageComponents = new ArrayList<Message>();
  
              for (KeyValue option : options) {
  
                  // do this??
                  if (option instanceof UifOptionGroupLabel) {
                      continue;
                  }
  
                  Message message = ComponentFactory.getMessage();
  
                  String key = option.getKey();
                  if (key.contains(UifConstants.EL_PLACEHOLDER_PREFIX)) {
                      key = ViewLifecycle.getExpressionEvaluator().evaluateExpression(this.getContext(), key).toString();
                  }
  
                  String value = option.getValue();
                  if (value.contains(UifConstants.EL_PLACEHOLDER_PREFIX)) {
                      value = ViewLifecycle.getExpressionEvaluator().evaluateExpression(this.getContext(), value).toString();
                  }
  
                  message.setMessageText(value);
                  message.setInlineComponents(inlineComponents);
                  message.setRenderWrapperTag(false);
  
                  // if the option is a sub-class of AbstractKeyValue class, then we also include the disabled attribute
                  if(AbstractKeyValue.class.isAssignableFrom(option.getClass()) && ((AbstractKeyValue)option).isDisabled()) {
                      richOptions.add(new KeyMessage(key, value, message, ((AbstractKeyValue)option).isDisabled()));
                 } else {
                     richOptions.add(new KeyMessage(key, value, message));
                 }
 
                 internalMessageComponents.add(message);
             }
         }
     }
 
     /**
      * Adds appropriate parent data to inputs internal to the controls that may be in rich content of options
      *
      * {@inheritDoc}
      */
     @Override
     public void performFinalize(Object model, LifecycleElement parent) {
         super.performFinalize(model, parent);
 
         View view = ViewLifecycle.getView();
         ExpressionEvaluator expressionEvaluator = ViewLifecycle.getExpressionEvaluator();
 
         if (options != null && !options.isEmpty()) {
             for (KeyValue option : options) {
                 if (option instanceof UifKeyValueLocation) {
                     locationSelect = true;
 
                     UrlInfo url = ((UifKeyValueLocation) option).getLocation();
 
                     ViewLifecycle.getExpressionEvaluator().populatePropertyExpressionsFromGraph(url, false);
                     expressionEvaluator.evaluateExpressionsOnConfigurable(view, url, view.getContext());
                 }
             }
         }
 
         if (richOptions == null || richOptions.isEmpty()) {
             return;
         }
 
         //Messages included in options which have have rich message content need to be aware of their parent for
         //validation purposes
         for (KeyMessage richOption : richOptions) {
             List<Component> components = richOption.getMessage().getMessageComponentStructure();
 
             if (components != null && !components.isEmpty()) {
                 for (Component c : components) {
                     if (c instanceof Container || c instanceof InputField) {
                         c.addDataAttribute(UifConstants.DataAttributes.PARENT, parent.getId());
                     }
                 }
             }
         }
 
     }
 
     /**
      * @see MultiValueControl#getOptions()
      */
     @BeanTagAttribute
     public List<KeyValue> getOptions() {
         return this.options;
     }
 
     /**
      * {@inheritDoc}
      */
     public void setOptions(List<KeyValue> options) {
         this.options = options;
     }
 
     /**
      * Gets the inlineComponents which represent components that can be referenced in an option's value
      * by index
      *
      * @return the components that can be used in rich values of options
      */
     @BeanTagAttribute
     public List<Component> getInlineComponents() {
         return inlineComponents;
     }
 
     /**
      * Sets the inlineComponents which represent components that can be referenced in an option's value
      * by index
      *
      * @param inlineComponents
      */
     public void setInlineComponents(List<Component> inlineComponents) {
         this.inlineComponents = inlineComponents;
     }
 
     /**
      * @see MultiValueControl#getRichOptions()
      */
     public List<KeyMessage> getRichOptions() {
         return richOptions;
     }
 
     /**
      * Sets the richOptions.  This will always override/ignore options if set.
      *
      * <p><b>Messages MUST be defined</b> when using this setter, do not use this setter for most cases
      * as setting options through setOptions, with a richMessage value, is appropriate in MOST cases.  This
      * setter is only available for full control.</p>
      *
      * @param richOptions with their messages predefined
      */
     public void setRichOptions(List<KeyMessage> richOptions) {
         this.richOptions = richOptions;
     }
 
     /**
      * Used by reflection during the lifecycle to get internal message components that may be contained in options
      *
      * <p>There are no references to this method in the code, this is intentional.  DO NOT REMOVE.</p>
      *
      * @return the internal message components, if any
      */
     public List<Message> getInternalMessageComponents() {
         return internalMessageComponents;
     }
 
     /**
      * If true, this select represents a location select (navigate on select of option)
      *
      * @return true if this is a location select
      */
     public boolean isLocationSelect() {
         return locationSelect;
     }
 
     /**
      * Sets the location select (navigate on select of option)
      *
      * @param locationSelect
      */
     protected void setLocationSelect(boolean locationSelect) {
         this.locationSelect = locationSelect;
     }
 }