/*!
 * 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.testsupport.font;

import org.pentaho.reporting.engine.classic.core.ClassicEngineBoot;
import org.pentaho.reporting.engine.classic.core.testsupport.font.parser.FontMetricsCollection;
import org.pentaho.reporting.libraries.fonts.LibFontBoot;
import org.pentaho.reporting.libraries.fonts.cache.FontCache;
import org.pentaho.reporting.libraries.fonts.registry.FontFamily;
import org.pentaho.reporting.libraries.fonts.registry.FontIdentifier;
import org.pentaho.reporting.libraries.fonts.registry.FontMetricsFactory;
import org.pentaho.reporting.libraries.fonts.registry.FontRegistry;
import org.pentaho.reporting.libraries.resourceloader.Resource;
import org.pentaho.reporting.libraries.resourceloader.ResourceException;
import org.pentaho.reporting.libraries.resourceloader.ResourceManager;

public class LocalFontRegistry implements FontRegistry {
  private static FontCache secondLevelCache;
  private FontMetricsCollection fontMetricsCollection;

  protected static synchronized FontCache internalGetSecondLevelCache() {
    if ( secondLevelCache == null ) {
      secondLevelCache = LibFontBoot.getInstance().createDefaultCache();
    }
    return secondLevelCache;
  }

  public LocalFontRegistry() {
  }

  public LocalFontMetricsBase getFontMetricsBase( final FontIdentifier identifier ) {
    if ( ( identifier instanceof LocalFontRecord ) == false ) {
      throw new IllegalStateException();
    }
    final LocalFontRecord record = (LocalFontRecord) identifier;
    return fontMetricsCollection.getMetrics( record.getOriginatingFile() );
  }

  public void initialize() {
    try {
      final ResourceManager resourceManager = new ResourceManager();
      resourceManager.registerDefaults();
      final Resource resource = resourceManager.createDirectly( "res://fonts.xml", FontMetricsCollection.class );
      this.fontMetricsCollection = (FontMetricsCollection) resource.getResource();
    } catch ( ResourceException e ) {
      throw new IllegalStateException( e );
    }
  }

  public FontCache getSecondLevelCache() {
    return internalGetSecondLevelCache();
  }

  /**
   * Tries to find a font family with the given name, looking through all alternative font names if neccessary.
   *
   * @param name
   * @return the font family or null, if there is no such family.
   */
  public FontFamily getFontFamily( final String name ) {
    final LocalFontFamily fontFamily = fontMetricsCollection.getFontFamily( name );
    if ( fontFamily != null ) {
      return fontFamily;
    }
    final String fallbackName = fontMetricsCollection.getFallbackName();
    if ( fallbackName != null && fallbackName.equals( name ) == false ) {
      return getFontFamily( fallbackName );
    }
    return null;
  }

  public String[] getRegisteredFamilies() {
    return fontMetricsCollection.getFontFamilies();
  }

  public String[] getAllRegisteredFamilies() {
    return fontMetricsCollection.getFontFamilies();
  }

  public FontMetricsFactory createMetricsFactory() {
    return new LocalFontMetricsFactory( this );
  }

  public static void main( String[] args ) {
    ClassicEngineBoot.getInstance().start();
    LocalFontRegistry registry = new LocalFontRegistry();
    registry.initialize();
  }
}