/*
    * Copyright (c) 2002-2025 Gargoyle Software Inc.
    *
    * Licensed under the Apache License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    * https://www.apache.org/licenses/LICENSE-2.0
    *
    * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.htmlunit.javascript.configuration;
  
  import java.util.Map;
  import java.util.WeakHashMap;
  
  import org.htmlunit.BrowserVersion;
  import org.htmlunit.javascript.HtmlUnitScriptable;
  import org.htmlunit.javascript.proxyautoconfig.ProxyAutoConfig;
  
  /**
   * A container for all the JavaScript configuration information used for the
   * proxy AutoConfig support.
   *
   * @author Ronald Brill
   */
  public final class ProxyAutoConfigJavaScriptConfiguration extends AbstractJavaScriptConfiguration {
  
      @SuppressWarnings("unchecked")
      static final Class<? extends HtmlUnitScriptable>[] CLASSES_ = new Class[] {ProxyAutoConfig.class};
  
      /** Cache of browser versions and their corresponding JavaScript configurations. */
      private static final Map<String, ProxyAutoConfigJavaScriptConfiguration> CONFIGURATION_MAP_ = new WeakHashMap<>();
  
      /**
       * Constructor is only called from {@link #getInstance(BrowserVersion)} which is synchronized.
       * @param browser the browser version to use
       */
      private ProxyAutoConfigJavaScriptConfiguration(final BrowserVersion browser) {
          super(browser, ProxyAutoConfig.class);
      }
  
      /**
       * Returns the instance that represents the configuration for the specified {@link BrowserVersion}.
       * This method is synchronized to allow multi-threaded access to the JavaScript configuration.
       * @param browserVersion the {@link BrowserVersion}
       * @return the instance for the specified {@link BrowserVersion}
       */
      @SuppressWarnings("PMD.SingletonClassReturningNewInstance")
      public static synchronized ProxyAutoConfigJavaScriptConfiguration getInstance(final BrowserVersion browserVersion) {
          if (browserVersion == null) {
              throw new IllegalArgumentException("BrowserVersion must be provided");
          }
          ProxyAutoConfigJavaScriptConfiguration configuration = CONFIGURATION_MAP_.get(browserVersion.getNickname());
  
          if (configuration == null) {
              configuration = new ProxyAutoConfigJavaScriptConfiguration(browserVersion);
              CONFIGURATION_MAP_.put(browserVersion.getNickname(), configuration);
          }
          return configuration;
      }
  
      @Override
      protected Class<? extends HtmlUnitScriptable>[] getClasses() {
          return CLASSES_;
      }
  }