/*
 * ============================================================================
 *                 The Apache Software License, Version 1.1
 * ============================================================================
 *
 * Copyright (C) 2002 The Apache Software Foundation. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modifica-
 * tion, are permitted provided that the following conditions are met:
 *
 * 1. Redistributions of  source code must  retain the above copyright  notice,
 *    this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright notice,
 *    this list of conditions and the following disclaimer in the documentation
 *    and/or other materials provided with the distribution.
 *
 * 3. The end-user documentation included with the redistribution, if any, must
 *    include the following  acknowledgment: "This product includes software
 *    developed by SuperBonBon Industries (http://www.sbbi.net/)."
 *    Alternately, this acknowledgment may appear in the software itself, if
 *    and wherever such third-party acknowledgments normally appear.
 *
 * 4. The names "UPNPLib" and "SuperBonBon Industries" must not be
 *    used to endorse or promote products derived from this software without
 *    prior written permission. For written permission, please contact
 *    info@sbbi.net.
 *
 * 5. Products  derived from this software may not be called 
 *    "SuperBonBon Industries", nor may "SBBI" appear in their name, 
 *    without prior written permission of SuperBonBon Industries.
 *
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESSED OR IMPLIED WARRANTIES,
 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS  FOR A PARTICULAR  PURPOSE ARE  DISCLAIMED. IN NO EVENT SHALL THE
 * APACHE SOFTWARE FOUNDATION OR ITS CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT,INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLU-
 * DING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * This software  consists of voluntary contributions made by many individuals
 * on behalf of SuperBonBon Industries. For more information on 
 * SuperBonBon Industries, please see <http://www.sbbi.net/>.
 */
package net.sbbi.upnp.services;

import java.io.IOException;
import java.net.URI;
import java.util.Date;
import java.util.Set;

import net.sbbi.upnp.messages.StateVariableMessage;
import net.sbbi.upnp.messages.UPNPMessageFactory;
import net.sbbi.upnp.messages.UPNPResponseException;

/**
 * Class to contain a service state variable definition
 * @author <a href="mailto:superbonbon@sbbi.net">SuperBonBon</a>
 * @version 1.0
 */
@SuppressWarnings("unchecked")
public class ServiceStateVariable implements ServiceStateVariableTypes {
  
  private StateVariableMessage stateVarMsg = null;
  
  protected String name;
  protected boolean sendEvents;
  protected String dataType;
  protected String defaultValue;
  
  protected String minimumRangeValue;
  protected String maximumRangeValue;
  protected String stepRangeValue;
  protected Set allowedvalues;
  protected UPNPService parent;
  
  protected ServiceStateVariable() {
  }
  
  /**
   * Call to the UPNP device to retreive the state variable actual value
   * @return the state variable actual value on the device, should be never null, an empty string could be returned by the device
   * @throws UPNPResponseException if the device throws an exception during query
   * @throws IOException if some IO error with device occurs during query
   */
  public String getValue() throws UPNPResponseException, IOException {
    if ( stateVarMsg == null ) {
      synchronized( this ) {
        if ( stateVarMsg == null ) {
          UPNPMessageFactory factory = UPNPMessageFactory.getNewInstance( parent );
          stateVarMsg = factory.getStateVariableMessage( name );
        }
      }
    }
    return stateVarMsg.service().getStateVariableValue();
  }
  
  /**
   * State variable name
   * @return the state variable name
   */
  public String getName() {
    return name;
  }
  
  /**
   * The parent UPNPService Object
   * @return the parent object instance
   */
  public UPNPService getParent() {
    return parent;
  }
  
  /**
   * Boolean to indicate if the variable is sending events when value
   * of the var is changing. The events can be subscribed via the {@link net.sbbi.upnp.ServicesEventing}
   * class
   * @return true if sending events
   */
  public boolean isSendEvents() {
    return sendEvents;
  }
  
  /**
   * The default value of the state variable
   * @return the default value representation as an string
   */
  public String getDefaultValue() {
    return defaultValue;
  }
  
  /**
   * The variable UPNP data type
   * @return the data type
   */
  public String getDataType() {
    return dataType;
  }
  
  /**
   * The varialbe JAVA data type (using an UPNP->Java mapping)
   * @return the class mapped
   */
  public Class getDataTypeAsClass() {
    return getDataTypeClassMapping( dataType );
  }
  
  /**
   * A set of allowed values (String objects) for the variable
   * @return the allowed values or null if none
   */
  public Set getAllowedvalues() {
    return allowedvalues;
  }
  
  /**
   * The minimum value as a string
   * @return the minimum value or null if no restriction
   */
  public String getMinimumRangeValue() {
    return minimumRangeValue;
  }
  
  /**
   * The maximum value as a string
   * @return the maximum value or null if no restriction
   */
  public String getMaximumRangeValue() {
    return maximumRangeValue;
  }
  
  /**
   * The value step range as a string
   * @return the value step raqnge or null if no restriction
   */
  public String getStepRangeValue() {
    return stepRangeValue;
  }
  
  public static Class getDataTypeClassMapping( String dataType ) {
    int hash = dataType.hashCode();
    if ( hash == UI1_INT ) return Short.class;
    else if ( hash == UI2_INT ) return Integer.class;
    else if ( hash == UI4_INT ) return Long.class;
    else if ( hash == I1_INT ) return Byte.class;
    else if ( hash == I2_INT ) return Short.class;
    else if ( hash == I4_INT ) return Integer.class;
    else if ( hash == INT_INT ) return Integer.class;
    else if ( hash == R4_INT ) return Float.class;
    else if ( hash == R8_INT ) return Double.class;
    else if ( hash == NUMBER_INT ) return Double.class;
    else if ( hash == FIXED_14_4_INT ) return Double.class;
    else if ( hash == FLOAT_INT ) return Float.class;
    else if ( hash == CHAR_INT) return Character.class;
    else if ( hash == STRING_INT ) return String.class;
    else if ( hash == DATE_INT ) return Date.class;
    else if ( hash == DATETIME_INT ) return Date.class;
    else if ( hash == DATETIME_TZ_INT ) return Date.class;
    else if ( hash == TIME_INT ) return Date.class;
    else if ( hash == TIME_TZ_INT ) return Date.class;
    else if ( hash == BOOLEAN_INT ) return Boolean.class;
    else if ( hash == BIN_BASE64_INT ) return String.class;
    else if ( hash == BIN_HEX_INT ) return String.class;
    else if ( hash == URI_INT ) return URI.class;
    else if ( hash == UUID_INT ) return String.class;
    return null;
  }
  
  public static String getUPNPDataTypeMapping( String className ) {
    if ( className.equals( Short.class.getName() ) || className.equals( "short" )) return I2;
    else if ( className.equals( Byte.class.getName() ) || className.equals( "byte" )) return I1;
    else if ( className.equals( Integer.class.getName() ) || className.equals( "int" ) ) return INT;
    else if ( className.equals( Long.class.getName() ) || className.equals( "long" ) ) return UI4;
    else if ( className.equals( Float.class.getName() ) || className.equals( "float" )) return FLOAT;
    else if ( className.equals( Double.class.getName() ) || className.equals( "double" ) ) return NUMBER;
    else if ( className.equals( Character.class.getName() ) || className.equals( "char" ) ) return CHAR;
    else if ( className.equals( String.class.getName() )  || className.equals( "string" ) ) return STRING;
    else if ( className.equals( Date.class.getName() ) ) return DATETIME;
    else if ( className.equals( Boolean.class.getName() ) || className.equals( "boolean" ) ) return BOOLEAN;
    else if ( className.equals( URI.class.getName() ) ) return URI;
    return null;
  }
  
  public static Object UPNPToJavaObject( String dataType, String value ) throws Throwable {
    if ( value == null ) throw new Exception( "null value" );
    if ( dataType == null ) throw new Exception( "null dataType" );
    int hash = dataType.hashCode();
    if ( hash == UI1_INT ) return new Short( value );
    else if ( hash == UI2_INT ) return new Integer( value );
    else if ( hash == UI4_INT ) return new Long( value );
    else if ( hash == I1_INT ) return new Byte( value );
    else if ( hash == I2_INT ) return new Short( value );
    else if ( hash == I4_INT ) return new Integer( value );
    else if ( hash == INT_INT ) return new Integer( value );
    else if ( hash == R4_INT ) return new Float( value );
    else if ( hash == R8_INT ) return new Double( value );
    else if ( hash == NUMBER_INT ) return new Double( value );
    else if ( hash == FIXED_14_4_INT ) return new Double( value );
    else if ( hash == FLOAT_INT ) return new Float( value );
    else if ( hash == CHAR_INT) return new Character( value.charAt( 0 ) );
    else if ( hash == STRING_INT ) return value;
    else if ( hash == DATE_INT ) return ISO8601Date.parse( value );
    else if ( hash == DATETIME_INT ) return ISO8601Date.parse( value );
    else if ( hash == DATETIME_TZ_INT ) return ISO8601Date.parse( value );
    else if ( hash == TIME_INT ) return ISO8601Date.parse( value );
    else if ( hash == TIME_TZ_INT ) return ISO8601Date.parse( value );
    else if ( hash == BOOLEAN_INT ) {
      if ( value.equals( "1" ) || value.equalsIgnoreCase( "yes" ) || value.equals( "true" ) ) {
        return Boolean.TRUE;
      }
      return Boolean.FALSE;
    }
    else if ( hash == BIN_BASE64_INT ) return value;
    else if ( hash == BIN_HEX_INT ) return value;
    else if ( hash == URI_INT ) return new URI( value );
    else if ( hash == UUID_INT ) return value;
    throw new Exception( "Unhandled data type " + dataType );
  }
  
}