/**
    * This file Copyright (c) 2011-2012 Magnolia International
    * Ltd.  (http://www.magnolia-cms.com). All rights reserved.
    *
    *
    * This file is dual-licensed under both the Magnolia
    * Network Agreement and the GNU General Public License.
    * You may elect to use one or the other of these licenses.
    *
   * This file is distributed in the hope that it will be
   * useful, but AS-IS and WITHOUT ANY WARRANTY; without even the
   * implied warranty of MERCHANTABILITY or FITNESS FOR A
   * PARTICULAR PURPOSE, TITLE, or NONINFRINGEMENT.
   * Redistribution, except as permitted by whichever of the GPL
   * or MNA you select, is prohibited.
   *
   * 1. For the GPL license (GPL), you can redistribute and/or
   * modify this file under the terms of the GNU General
   * Public License, Version 3, as published by the Free Software
   * Foundation.  You should have received a copy of the GNU
   * General Public License, Version 3 along with this program;
   * if not, write to the Free Software Foundation, Inc., 51
   * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
   *
   * 2. For the Magnolia Network Agreement (MNA), this file
   * and the accompanying materials are made available under the
   * terms of the MNA which accompanies this distribution, and
   * is available at http://www.magnolia-cms.com/mna.html
   *
   * Any modifications to this file must keep this entire header
   * intact.
   *
   */
  package info.magnolia.jcr.util;
  
  import info.magnolia.cms.core.Content;
  import info.magnolia.cms.util.DateUtil;
  import info.magnolia.context.MgnlContext;
  
  import java.io.InputStream;
  import java.math.BigDecimal;
  import java.util.ArrayList;
  import java.util.Calendar;
  import java.util.Collection;
  import java.util.Date;
  import java.util.GregorianCalendar;
  import java.util.HashSet;
  import java.util.List;
  import java.util.Set;
  import java.util.TimeZone;
  
  import javax.jcr.Binary;
  import javax.jcr.Node;
  import javax.jcr.Property;
  import javax.jcr.PropertyType;
  import javax.jcr.RepositoryException;
  import javax.jcr.Value;
  import javax.jcr.ValueFactory;
  
  import org.apache.commons.io.IOUtils;
  import org.apache.commons.lang.BooleanUtils;
  import org.apache.commons.lang.StringUtils;
  import org.apache.commons.lang.time.FastDateFormat;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * Property-related utility methods.
   */
  public class PropertyUtil {
  
      private static final Logger log = LoggerFactory.getLogger(PropertyUtil.class);
  
      public static void renameProperty(Property property, String newName) throws RepositoryException {
          Node node = property.getParent();
          node.setProperty(newName, property.getValue());
          property.remove();
      }
  
      /**
       * Allows setting a Node's property from an object.
       */
      @SuppressWarnings("unchecked")
      public static void setProperty(Node node, String propertyName, Object propertyValue) throws RepositoryException {
          if (node == null) {
              throw new IllegalArgumentException("Cannot set a property on a null-node!");
          }
          if (propertyName == null) {
              throw new IllegalArgumentException("Cannot set a property without a provided name");
          }
  
          if (propertyValue == null){
              node.setProperty(propertyName, (Value) null);
          } else if (propertyValue instanceof Value) {
              node.setProperty(propertyName, (Value) propertyValue);
          } else if (propertyValue instanceof Node) {
              node.setProperty(propertyName, (Node) propertyValue);
          } else if (propertyValue instanceof Binary) {
              node.setProperty(propertyName, (Binary) propertyValue);
         } else if (propertyValue instanceof Calendar) {
             node.setProperty(propertyName, (Calendar) propertyValue);
         } else if (propertyValue instanceof Date) {
             Calendar cal = Calendar.getInstance();
             cal.setTime((Date) propertyValue);
             node.setProperty(propertyName, cal);
         } else if (propertyValue instanceof BigDecimal) {
             node.setProperty(propertyName, (BigDecimal) propertyValue);
         } else if (propertyValue instanceof String) {
             node.setProperty(propertyName, (String) propertyValue);
         } else if (propertyValue instanceof Long) {
             node.setProperty(propertyName, ((Long) propertyValue).longValue());
         } else if (propertyValue instanceof Double) {
             node.setProperty(propertyName, (Double) propertyValue);
         } else if (propertyValue instanceof Boolean) {
             node.setProperty(propertyName, (Boolean) propertyValue);
         } else if (propertyValue instanceof InputStream) {
             node.setProperty(propertyName, (InputStream) propertyValue);
         } else if (propertyValue instanceof Collection) {
             String[] list = new String[((Collection<Object>)propertyValue).size()];
             int pos = 0;
             for (Object value : (Collection<Object>)propertyValue) {
                 list[pos] = value.toString();
                 pos +=1;
             }
             node.setProperty(propertyName, list);
         } else {
             // TODO dlipp: verify if this is desired default-behavior: NodeDataUtil#setValue sets propertyValue.toString() as default!
             throw new IllegalArgumentException("Cannot set property to a value of type " + propertyValue.getClass());
         }
     }
 
     /**
      * Transforms a string to a jcr value object.
      */
     public static Value createValue(String valueStr, int type, ValueFactory valueFactory) {
         Value value = null;
         if (type == PropertyType.STRING) {
             value = valueFactory.createValue(valueStr);
         } else if (type == PropertyType.BOOLEAN) {
             value = valueFactory.createValue(BooleanUtils.toBoolean(valueStr));
         } else if (type == PropertyType.DOUBLE) {
             try {
                 value = valueFactory.createValue(Double.parseDouble(valueStr));
             } catch (NumberFormatException e) {
                 value = valueFactory.createValue(0d);
             }
         } else if (type == PropertyType.LONG) {
             try {
                 value = valueFactory.createValue(Long.parseLong(valueStr));
             } catch (NumberFormatException e) {
                 value = valueFactory.createValue(0L);
             }
         } else if (type == PropertyType.DATE) {
             try {
                 Calendar date = new GregorianCalendar();
                 try {
                     String newDateAndTime = valueStr;
                     String[] dateAndTimeTokens = newDateAndTime.split("T");
                     String newDate = dateAndTimeTokens[0];
                     String[] dateTokens = newDate.split("-");
                     int hour = 0;
                     int minute = 0;
                     int second = 0;
                     int year = Integer.parseInt(dateTokens[0]);
                     int month = Integer.parseInt(dateTokens[1]) - 1;
                     int day = Integer.parseInt(dateTokens[2]);
                     if (dateAndTimeTokens.length > 1) {
                         String newTime = dateAndTimeTokens[1];
                         String[] timeTokens = newTime.split(":");
                         hour = Integer.parseInt(timeTokens[0]);
                         minute = Integer.parseInt(timeTokens[1]);
                         second = Integer.parseInt(timeTokens[2]);
                     }
                     date.set(year, month, day, hour, minute, second);
                     // this is used in the searching
                     date.set(Calendar.MILLISECOND, 0);
                     date.setTimeZone(TimeZone.getTimeZone("GMT"));
                 }
                 // todo time zone??
                 catch (Exception e) {
                     // ignore, it sets the current date / time
                 }
                 value = valueFactory.createValue(date);
             } catch (Exception e) {
                 log.debug("Exception caught: " + e.getMessage(), e);
             }
         }
 
         return value;
 
     }
 
     /**
      * @return JCR-PropertyType corresponding to provided Object.
      */
     public static int getJCRPropertyType(Object obj) {
         if (obj instanceof String) {
             return PropertyType.STRING;
         }
         if (obj instanceof Double) {
             return PropertyType.DOUBLE;
         }
         if (obj instanceof Float) {
             return PropertyType.DOUBLE;
         }
         if (obj instanceof Long) {
             return PropertyType.LONG;
         }
         if (obj instanceof Integer) {
             return PropertyType.LONG;
         }
         if (obj instanceof Boolean) {
             return PropertyType.BOOLEAN;
         }
         if (obj instanceof Calendar) {
             return PropertyType.DATE;
         }
         if (obj instanceof Binary) {
             return PropertyType.BINARY;
         }
         if (obj instanceof InputStream) {
             return PropertyType.BINARY;
         }
         if (obj instanceof Content) {
             return PropertyType.REFERENCE;
         }
         return PropertyType.UNDEFINED;
     }
 
     /**
      * Updates existing property or creates a new one if it doesn't exist already.
      */
     public static void updateOrCreate(Node node, String string, GregorianCalendar gregorianCalendar) throws RepositoryException {
         if (node.hasProperty(string)) {
             node.getProperty(string).setValue(gregorianCalendar);
         } else {
             node.setProperty(string, gregorianCalendar);
         }
     }
 
     public static String getDateFormat() {
         try {
             return FastDateFormat.getDateInstance(
                     FastDateFormat.SHORT,
                     MgnlContext.getLocale()).getPattern();
         } catch (IllegalStateException e) {
             // this happens if the context is not (yet) set
             return DateUtil.YYYY_MM_DD;
         }
     }
 
     public static List<String> getValuesStringList(Value[] values) {
         ArrayList<String> list = new ArrayList<String>();
         for (Value value : values) {
             list.add(getValueString(value));
         }
         return list;
     }
 
     /**
      * Returns value of the property converted to string no matter what it's type actually is. In case of dates, value if formatted according to format returned by {@link #getDateFormat()}. Binary and reference values are converted to empty string. In case of error during conversion, null will be returned instead. Works only for single value properties.
      */
     public static String getValueString(Property property) {
         try {
             return getValueString(property.getValue());
         } catch (RepositoryException e) {
             log.debug("RepositoryException caught: " + e.getMessage(), e);
             return null;
         }
     }
 
     /**
      * Returns value converted to string no matter what it's type actually is. In case of dates, value if formatted according to format returned by {@link #getDateFormat()}. Binary and reference values are converted to empty string. In case of error during conversion, null will be returned instead.
      */
     public static String getValueString(Value value) {
         try {
             switch (value.getType()) {
             case (PropertyType.STRING):
                 return value.getString();
             case (PropertyType.DOUBLE):
                 return Double.toString(value.getDouble());
             case (PropertyType.LONG):
                 return Long.toString(value.getLong());
             case (PropertyType.BOOLEAN):
                 return Boolean.toString(value.getBoolean());
             case (PropertyType.DATE):
                 Date valueDate = value.getDate().getTime();
             return DateUtil.format(valueDate, PropertyUtil.getDateFormat());
             case (PropertyType.BINARY):
                 // for lack of better solution, fall through to the default - empty string
             default:
                 return StringUtils.EMPTY;
             }
         } catch (RepositoryException e) {
             log.debug("RepositoryException caught: " + e.getMessage(), e);
         }
         return null;
 
     }
 
     public static Value createValue(Object obj, ValueFactory valueFactory) throws RepositoryException {
         switch (PropertyUtil.getJCRPropertyType(obj)) {
         case PropertyType.STRING:
             return valueFactory.createValue((String) obj);
         case PropertyType.BOOLEAN:
             return valueFactory.createValue((Boolean) obj);
         case PropertyType.DATE:
             return valueFactory.createValue((Calendar) obj);
         case PropertyType.LONG:
             return obj instanceof Long ? valueFactory.createValue(((Long) obj).longValue()) : valueFactory.createValue(((Integer) obj).longValue());
         case PropertyType.DOUBLE:
             return obj instanceof Double ? valueFactory.createValue((Double) obj) : valueFactory.createValue(((Float) obj).doubleValue());
         case PropertyType.BINARY:
             return valueFactory.createValue((InputStream) obj);
         case PropertyType.REFERENCE:
             return valueFactory.createValue(((Content) obj).getJCRNode());
         default:
             return (obj != null ? valueFactory.createValue(obj.toString()) : valueFactory.createValue(StringUtils.EMPTY));
         }
     }
 
     /**
      * Return the Calendar representing the node property value.
      * If the Node did not contain such a Property,
      * then return <b>null</b>.
      */
     public static Calendar getDate(Node node, String name) {
         return getDate(node, name, null);
     }
 
     /**
      * Return the Calendar representing the node property value.
      * If the Node did not contain such a Property,
      * then return the default value.
      */
     public static Calendar getDate(Node node, String name, Calendar defaultValue) {
         try {
             if (node.hasProperty(name)) {
                 return node.getProperty(name).getDate();
             }
         } catch (RepositoryException e) {
             log.error("can't read value '" + name + "' of the Node '" + node.toString() + "' will return default value", e);
         }
         return defaultValue;
     }
 
     /**
      * Return the String representing the node property value.
      * If the Node did not contain such a Property,
      * then return <b>null</b>.
      */
     public static String getString(Node node, String name) {
         return getString(node, name, null);
     }
 
     /**
      * Return the String representing the node property value.
      * If the Node did not contain such a Property,
      * then return the default value.
      */
     public static String getString(Node node, String name, String defaultValue) {
         try {
             if (node.hasProperty(name)) {
                 return node.getProperty(name).getString();
             }
         } catch (RepositoryException e) {
             log.error("can't read value '" + name + "' of the Node '" + node.toString() + "' will return default value", e);
         }
         return defaultValue;
     }
 
     /**
      * Return the boolean representing the node property value.
      * If the Node did not contain such a Property,
      * then return the default value.
      */
     public static boolean getBoolean(Node node, String name, boolean defaultValue) {
         try {
             if (node.hasProperty(name)) {
                 return node.getProperty(name).getBoolean();
             }
         } catch (RepositoryException e) {
             log.error("can't read value '" + name + "' of the Node '" + node.toString() + "' will return default value", e);
         }
         return defaultValue;
     }
 
     /**
      * Return the Property relative to the Node or null if it's not existing or in case of any RepositoryException.
      */
     public static Property getPropertyOrNull(Node node, String relativePath) {
         try {
             return node.hasProperty(relativePath) ? node.getProperty(relativePath) : null;
         }
         catch (RepositoryException e) {
             log.debug("Could not retrieve property " + relativePath, e);
         }
         return null;
     }
 
     /**
      * @deprecated since 4.5 - use getPropertyOrNull instead
      */
     public static Property getProperty(Node node, String relativePath) {
         return getPropertyOrNull(node, relativePath);
     }
 
     /**
      * Return the Value Object from a property.
      * Return null in case of exception.
      * The returned Object could be a basic {@link PropertyType} type or in case
      * of multivalue, a Set of {@link PropertyType} type objects.
      *
      */
     public static Object getPropertyValueObject(Node node, String relativePath) {
         final Property property = getPropertyOrNull(node, relativePath);
         if(property != null) {
             try {
                 //Handle Multivalue fields
                 if(property.isMultiple()) {
                     Value[] values = property.getValues();
                     Set<Object> res = new HashSet<Object>();
                     for(Value value:values) {
                         res.add(getValueObject(value));
                     }
                     return res;
                 } else {
                     return getValueObject(property.getValue());
                 }
 
             } catch (Exception e) {
                 log.warn("Exception during casting the property value", e);
             }
         }
         return null;
     }
 
     /**
      * Return the Value Object from a {@link Value}.
      * Return null in case of exception.
      */
     public static Object getValueObject(Value value) {
         try {
             switch (value.getType()) {
                 case (PropertyType.DECIMAL):
                     return value.getDecimal();
                 case (PropertyType.STRING):
                     return value.getString();
                 case (PropertyType.DOUBLE):
                     return Double.valueOf(value.getDouble());
                 case (PropertyType.LONG):
                     return Long.valueOf(value.getLong());
                 case (PropertyType.BOOLEAN):
                     return Boolean.valueOf(value.getBoolean());
                 case (PropertyType.DATE):
                     return value.getDate().getTime();
                 case (PropertyType.BINARY):
                     return IOUtils.toByteArray(value.getBinary().getStream());
                 default:
                     return null;
             }
         } catch (Exception e) {
             log.warn("Exception during casting the property value", e);
         }
         return null;
     }
 
 }