/*
 * Copyright (c) 2012 International Digital Publishing Forum
 *
 *  Permission is hereby granted, free of charge, to any person obtaining a copy of
 *  this software and associated documentation files (the "Software"), to deal in
 *  the Software without restriction, including without limitation the rights to
 *  use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 *  the Software, and to permit persons to whom the Software is furnished to do so,
 *  subject to the following conditions:
 *
 *  The above copyright notice and this permission notice shall be included in all
 *  copies or substantial portions of the Software.
 *
 *  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 *  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 *  FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 *  COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 *  IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 *  CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 */
package org.idpf.epubcheck.util.css;

import com.google.common.base.Charsets;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.URL;
import java.net.URLConnection;
import java.text.MessageFormat;
import java.util.Locale;
import java.util.MissingResourceException;
import java.util.PropertyResourceBundle;
import java.util.ResourceBundle;
import java.util.ResourceBundle.Control;

final class Messages
{
  private static final String BUNDLE_NAME = "org.idpf.epubcheck.util.css.messages"; //$NON-NLS-1$
  private static final ResourceBundle RESOURCE_BUNDLE = ResourceBundle.getBundle(BUNDLE_NAME, Locale.getDefault(), new UTF8Control());

  static String get(String key)
  {
    try
    {
      return RESOURCE_BUNDLE.getString(key);
    }
    catch (MissingResourceException e)
    {
      return key;
    }
  }

  static String get(String key, Object... arguments)
  {
    try
    {
      return MessageFormat.format(RESOURCE_BUNDLE.getString(key), arguments);
    }
    catch (MissingResourceException e)
    {
      return key;
    }
  }

  private static class UTF8Control extends Control
  {
    public ResourceBundle newBundle
        (String baseName, Locale locale, String format, ClassLoader loader, boolean reload)
        throws
        IllegalAccessException,
        InstantiationException,
        IOException
    {
      // The below is a copy of the default implementation.
      String bundleName = toBundleName(baseName, locale);
      String resourceName = toResourceName(bundleName, "properties"); //$NON-NLS-1$
      ResourceBundle bundle = null;
      InputStream stream = null;
      if (reload)
      {
        URL url = loader.getResource(resourceName);
        if (url != null)
        {
          URLConnection connection = url.openConnection();
          if (connection != null)
          {
            connection.setUseCaches(false);
            stream = connection.getInputStream();
          }
        }
      }
      else
      {
        stream = loader.getResourceAsStream(resourceName);
      }
      if (stream != null)
      {
        try
        {
          // Only this line is changed to make it to read properties files as UTF-8.
          bundle = new PropertyResourceBundle(
              new BufferedReader(
                  new InputStreamReader(stream, Charsets.UTF_8)));
        }
        finally
        {
          stream.close();
        }
      }
      return bundle;
    }
  }

  private Messages()
  {
  }
}
