/**
    * Copyright 2010 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
    * <p/>
    * http://www.osedu.org/licenses/ECL-2.0
    * <p/>
    * 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.
   * <p/>
   */
  package org.kuali.student.common.ui.client.configurable.mvc.multiplicity;
  
  import java.util.ArrayList;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  import org.kuali.student.common.ui.client.configurable.mvc.FieldDescriptor;
  import org.kuali.student.common.ui.client.configurable.mvc.SectionTitle;
  import org.kuali.student.common.ui.client.widgets.field.layout.element.MessageKeyInfo;
  import org.kuali.student.r1.common.assembly.data.Metadata;
  import org.kuali.student.r1.common.assembly.data.QueryPath;
  
  import com.google.gwt.core.client.GWT;
  
  /**
    *
    * MultiplicityConfiguration is passed into a MultiplicitySection to control the creation of the multiplicity.
    *
    * This class is used to control the Multiplicity, e.g. if its updateable, has headers, min number of items, labels etc.
    * It also holds FieldDescriptors for the fields required to be included in the multiplicity. They are
    * held in a HashMap keyed by rows, i.e. {@literal Map<Integer, List<FieldDescriptor>>} .
    *
    * The parent for the multiplicity refers to the path to the high level field that owns
    * the repeating elements, e.g. course/versions is the parent field for course version fields versionCode and
    * versionTitle
    *
    * For multiplicities nested inside another multiplicity, create a MultiplicityConfiguration for the nested
    * multiplicity and call setNestedConfig to add the lower level multiplicity
    *
    *
   */
  public class MultiplicityConfiguration {
  
      private MultiplicityType multiplicityType;
      
      private StyleType styleType;
      private boolean updateable = false;
  
      private String itemLabel;
      private String addItemLabel;
      
      private Metadata metaData;
      
      private SectionTitle title;
      private int defaultItemsCreated = 0;
  
      int row = 0;
      
      private FieldDescriptor parentFd;
      private Map<Integer, List<MultiplicityFieldConfiguration>> fields = new HashMap<Integer, List<MultiplicityFieldConfiguration>>();
      private Map<String, FieldDescriptor> fieldMap = new HashMap<String, FieldDescriptor>();
      protected Map<String, String> concatenatedFields = new HashMap<String, String>();
      
      private MultiplicityConfiguration nestedConfig ;
      private MultiplicityGroup customMultiplicityGroup;
      private boolean showHeaders;
  
      public static enum MultiplicityType {GROUP, TABLE }
      public static enum StyleType {
          TOP_LEVEL_GROUP, SUB_LEVEL_GROUP, BORDERLESS_TABLE, BORDERED_TABLE
      }
  
      public MultiplicityConfiguration() {}
      
       /**
       *
       * Creates a new MultiplicityConfiguration.
       *
       *
       * @param multiplicityType      the type of multiplicity required, MultiplicityType
       * @param styleType             the style type for this multiplicity, StyleType
       * @param metaData              the metadata for the parentFd
       */
      public MultiplicityConfiguration(MultiplicityType multiplicityType, StyleType styleType, Metadata metaData) {
          init(multiplicityType, styleType, metaData);
      }
  
      public void init(MultiplicityType multiplicityType, StyleType styleType, Metadata metaData) {
          this.multiplicityType = multiplicityType;
          this.styleType = styleType;
          this.metaData = metaData;
      }
  
     /**
      * Causes a line throw so that the subsequent fields are placed on the next line of the screen
      *
      */
     public void nextLine() {
     	row++;
     }
 
     /**
      * Includes this field (as defined by the FieldDescriptor) on the current line at the next horizontal position
      *
      *
      * @param fieldDescriptor
      */
     public void addFieldConfiguration(MultiplicityFieldConfiguration fieldDescriptor) {
     	
         List<MultiplicityFieldConfiguration> fds;
         if (fields.containsKey(row)) {
             fds = fields.get(row);
         }
         else {
             fds = new ArrayList<MultiplicityFieldConfiguration>();
         }
         fds.add(fieldDescriptor);
         fields.put(row, fds);
     }
     
     public void setFields(Map<Integer, List<MultiplicityFieldConfiguration>> fields) {
         if (fields == null || fields.isEmpty()) {
             row = 0;
         } else {
             row = fields.size() - 1;
         }
         this.fields = fields;
     }
 
 	/**
 	 * Concatenates multiple field values into a single table cell
      *
      *  !!!!!  Currently only implemented for MultiplicityTable !!!!!
      *
      * The parentField should define a field with a Data value. The fieldKey should resolve to a single value
 	 * field in that Data value. The binding will iterate the values in the Data object
 	 * and concatenate the named fieldKeys into the same cell in the current row of the table
 	 * separated by commas.
      *
      * e.g. parentFD = "course/versions", fieldKey = "versionCode", version codes will be concatenated to
      * display "code1, code2, code3" in a single table cell
 	 *
 	 * @param fieldKey
 	 */
 	public void addConcatenatedField(MultiplicityFieldConfiguration parentField, String fieldKey){
 		addFieldConfiguration(parentField);
 		concatenatedFields.put(parentField.getFieldPath(), fieldKey);
 	}
 
     /**
      * Creates a copy of this MultiplicityConfiguration. Used when creating a new MultiplicityItem
      *
      * @return  MultiplicityConfiguration
      */
     public MultiplicityConfiguration copy() {
         MultiplicityConfiguration copy = GWT.create(MultiplicityConfiguration.class);
         copy.init(getMultiplicityType(), getStyleType(), getMetaData());
         copy.setAddItemLabel(getAddItemLabel());
         copy.setItemLabel(getItemLabel());
         copy.setMetaData(getMetaData());
         copy.setUpdateable(isUpdateable());
         copy.setDefaultItemsCreated(getDefaultItemsCreated());
         if (getNestedConfig() != null) {
             copy.setNestedConfig(getNestedConfig().copy());
         }
         FieldDescriptor parent = new FieldDescriptor(getParentFd().getFieldKey(), getParentFd().getMessageKey(), getParentFd().getMetadata());
         if(!getParentFd().isLabelShown()){
         	parent.hideLabel();
         }
         copy.setParent(parent);
         for (Integer row  : getFields().keySet()) {
             List<MultiplicityFieldConfiguration> fields = getFields().get(row);
             for (MultiplicityFieldConfiguration fieldConfig : fields) {
                 MultiplicityFieldConfiguration newfieldConfig = new MultiplicityFieldConfiguration(fieldConfig.getFieldPath(), fieldConfig.getMessageKeyInfo(), fieldConfig.getMetadata(), fieldConfig.getFieldWidgetInitializer());
                 newfieldConfig.setOptional(fieldConfig.isOptional());
                 newfieldConfig.setModelWidgetBinding(fieldConfig.getModelWidgetBinding());
                 copy.addFieldConfiguration(newfieldConfig);
             }
             copy.nextLine();
         }
         return copy;
     }
 
     public MultiplicityType getMultiplicityType() {
         return multiplicityType;
     }
 
      /**
       * Sets the MultiplicityType required for this config
       *
       * Valid values are defined in {@link #MultiplicityConfiguration.MultiplicityType}
       * @param multiplicityType
       */
      public void setMultiplicityType(MultiplicityType multiplicityType) {
         this.multiplicityType = multiplicityType;
     }
 
 	public FieldDescriptor getParentFd() {
 		return parentFd;
 	}
 
     /**
      * The parent fd defines the high level parent field that contains the repeating elements
      *
      * @param parentFd
      */
     public void setParent(FieldDescriptor parentFd) {
 		this.parentFd = parentFd;
 	}
 
 //	public Map<Integer, List<FieldDescriptor>> getFields() {return null;}
 
 	public Map<Integer, List<MultiplicityFieldConfiguration>> getFields() {
 		return fields;
 	}
 
     public String getItemLabel() {
         return itemLabel;
     }
 
     /**
      * Sets text to be used as the header for each multiplicity item
      * @param itemLabel
      */
     public void setItemLabel(String itemLabel) {
         this.itemLabel = itemLabel;
     }
 
     public String getAddItemLabel() {
         return addItemLabel;
     }
 
     /**
      * Sets text to be used as the button text to add a new empty item in the multiplicity
      * @param addItemLabel
      */
     public void setAddItemLabel(String addItemLabel) {
         this.addItemLabel = addItemLabel;
     }
 
 	public StyleType getStyleType() {
 		return styleType;
 	}
 
 	public void setStyleType(StyleType styleType) {
 		this.styleType = styleType;
 	}
 
 	public MultiplicityConfiguration getNestedConfig() {
 		return nestedConfig;
 	}
 
     /**
      * If this multiplicity is to contain other nested multiplicities, create a MultiplicityConfiguration for the child
      * multiplicity and set as a nested config in the parent.
      *
      * @param config
      */
     public void setNestedConfig(MultiplicityConfiguration config) {
 		this.nestedConfig = config;
 	}
 
     public boolean isShowHeaders() {
          return showHeaders;
     }
 
     /**
      *
      * @param showHeaders
      */
     public void setShowHeaders(boolean showHeaders) {
         this.showHeaders = showHeaders;
     }
 
 	public Map<String, String> getConcatenatedFields() {
 		return concatenatedFields;
 	}
 
     public boolean isUpdateable() {
         return updateable;
     }
 
     /**
      * Sets if this multiplicity will be updateable or display.
      * Add delete buttons/links will not be shown for display multiplicities
      *
      * @param updateable
      */
     public void setUpdateable(boolean updateable) {
         this.updateable = updateable;
     }
 
     public MultiplicityType getLayoutType() {
         return multiplicityType;
     }
 
     public void setLayoutType(MultiplicityType multiplicityType) {
         this.multiplicityType = multiplicityType;
     }
 
 	public Metadata getMetaData() {
 		return metaData;
 	}
 
 	public void setMetaData(Metadata metaData) {
 		this.metaData = metaData;
 	}
 
 
      public SectionTitle getTitle() {
         return title;
     }
 
     public void setTitle(SectionTitle title) {
         this.title = title;
     }
 
     /**
      * Creates a field descriptor for the parent for this multiplicity
      * This defines the high level parent field that contains the repeating elements
      * Will use default widget and binding. For more complex fields create your own
      * fieldDescriptor and use the other setParent method
      *
      * @param fieldKey
      * @param messageKey
      * @param parentPath
      * @param meta
      */
     public void setParent(String fieldKey, String messageKey,  String parentPath, Metadata meta) {
 
         QueryPath path = QueryPath.concat(parentPath, fieldKey);
         FieldDescriptor fd = new FieldDescriptor(path.toString(), new MessageKeyInfo(messageKey), meta);
         fd.getFieldElement().setRequired(false);
 
         setParent(fd);
 
     }
 
     /**
      * Includes this field on the current line at the next horizontal position
      *
      * Will use default widget and binding. For more complex fields create your own
      * FieldDescriptor and pass it in using the other addField method
      *
      * @param fieldKey
      * @param messageKey
      * @param parentPath
      * @param meta
      */
     public void addField(String fieldKey, String messageKey,  String parentPath, Metadata meta) {
 
         QueryPath path = QueryPath.concat(parentPath, QueryPath.getWildCard(), fieldKey);
 
         MultiplicityFieldConfiguration fieldConfig = new MultiplicityFieldConfiguration(path.toString(), new MessageKeyInfo(messageKey), meta, null);
         fieldConfig.setRequired(false);
         addFieldConfiguration(fieldConfig);
     }
 
 //    private String translatePath(String path, Metadata metadata) {
 //
 //        String result = path;
 //
 //        QueryPath qPath = QueryPath.parse(path);
 //
 //        if(metadata!=null&&metadata.getInitialLookup()!=null){
 //            QueryPath translationPath = qPath.subPath(0, qPath.size()-1);
 //            if (metadata.getDataType().equals(Data.DataType.STRING)) {
 //                translationPath.add(new Data.StringKey("_runtimeData"));
 //                translationPath.add(new Data.StringKey((String)qPath.get(qPath.size() - 1).get()));
 //                translationPath.add(new Data.StringKey("id-translation"));
 //                result = translationPath.toString();
 //            }
 //        }
 //        return result;
 //    }
 
     public MultiplicityGroup getCustomMultiplicityGroup() {
         return customMultiplicityGroup;
     }
 
     public void setCustomMultiplicityGroup(MultiplicityGroup customMultiplicityGroup) {
         this.customMultiplicityGroup = customMultiplicityGroup;
     }
 
 	public void setDefaultItemsCreated(int defaultItemsCreated) {
 		this.defaultItemsCreated = defaultItemsCreated;
 	}
 
 	public int getDefaultItemsCreated() {
 		return defaultItemsCreated;
 	}
     
     
 }