/*!
 * This program is free software; you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License, version 2.1 as published by the Free Software
 * Foundation.
 *
 * You should have received a copy of the GNU Lesser General Public License along with this
 * program; if not, you can obtain a copy at http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html
 * or from the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
 * without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 * See the GNU Lesser General Public License for more details.
 *
 * Copyright (c) 2002-2013 Pentaho Corporation..  All rights reserved.
 */

package org.pentaho.reporting.engine.classic.core.style.css.selector;

import org.pentaho.reporting.engine.classic.core.style.css.namespaces.NamespaceCollection;
import org.pentaho.reporting.engine.classic.core.style.css.selector.conditions.CSSCondition;
import org.w3c.css.sac.AttributeCondition;
import org.w3c.css.sac.CombinatorCondition;
import org.w3c.css.sac.Condition;
import org.w3c.css.sac.ConditionalSelector;
import org.w3c.css.sac.SimpleSelector;

/**
 * Creation-Date: 30.11.2005, 16:43:45
 *
 * @author Thomas Morgner
 */
public class CSSConditionalSelector extends AbstractSelector implements ConditionalSelector {
  private static final int ID_CONDITION = 0;
  private static final int ATTR_CONDITION = 1;
  private static final int OTHER_CONDITION = 2;

  private Condition condition;
  private SimpleSelector simpleSelector;

  public CSSConditionalSelector( final SimpleSelector simpleSelector, final Condition condition ) {
    this.simpleSelector = simpleSelector;
    this.condition = condition;
  }

  protected SelectorWeight createWeight() {
    final int[] conditions = new int[3];
    countConditions( conditions, condition );
    return new SelectorWeight( 0, conditions[0], conditions[1], conditions[2] + 1 );
  }

  private void countConditions( final int[] conditionCounter, final Condition condition ) {
    if ( condition.getConditionType() == Condition.SAC_ID_CONDITION ) {
      conditionCounter[ID_CONDITION] += 1;
    } else if ( condition instanceof AttributeCondition ) {
      conditionCounter[ATTR_CONDITION] += 1;
    } else if ( condition instanceof CombinatorCondition ) {
      final CombinatorCondition c = (CombinatorCondition) condition;
      countConditions( conditionCounter, c.getFirstCondition() );
      countConditions( conditionCounter, c.getSecondCondition() );
    } else {
      conditionCounter[OTHER_CONDITION] += 1;
    }
  }

  /**
   * Returns the simple selector.
   * <p>
   * The simple selector can't be a <code>ConditionalSelector</code>.
   * </p>
   */
  public SimpleSelector getSimpleSelector() {
    return simpleSelector;
  }

  /**
   * Returns the condition to be applied on the simple selector.
   */
  public Condition getCondition() {
    return condition;
  }

  /**
   * An integer indicating the type of <code>Selector</code>
   */
  public short getSelectorType() {
    return SAC_CONDITIONAL_SELECTOR;
  }

  public String print( final NamespaceCollection namespaces ) {
    final CSSSelector s = (CSSSelector) simpleSelector;
    final CSSCondition c = (CSSCondition) condition;
    return s.print( namespaces ) + c.print( namespaces );
  }
}