/*
    * ====================================================================
    * Licensed to the Apache Software Foundation (ASF) under one
    * or more contributor license agreements.  See the NOTICE file
    * distributed with this work for additional information
    * regarding copyright ownership.  The ASF licenses this file
    * to you 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
   *
   *   http://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.
   * ====================================================================
   *
   * This software consists of voluntary contributions made by many
   * individuals on behalf of the Apache Software Foundation.  For more
   * information on the Apache Software Foundation, please see
   * <http://www.apache.org/>.
   *
   */
  
  package org.apache.http.impl.cookie;
  
  import java.util.ArrayList;
  import java.util.List;
  import java.util.Locale;
  
  import org.apache.http.annotation.NotThreadSafe;
  
  import org.apache.http.HeaderElement;
  import org.apache.http.NameValuePair;
  import org.apache.http.cookie.Cookie;
  import org.apache.http.cookie.CookieAttributeHandler;
  import org.apache.http.cookie.CookieOrigin;
  import org.apache.http.cookie.MalformedCookieException;
  
  /**
   * Cookie management functions shared by all specification.
   *
   *
   * @since 4.0
   */
  @NotThreadSafe // AbstractCookieSpec is not thread-safe
  public abstract class CookieSpecBase extends AbstractCookieSpec {
  
      protected static String getDefaultPath(final CookieOrigin origin) {
          String defaultPath = origin.getPath();
          int lastSlashIndex = defaultPath.lastIndexOf('/');
          if (lastSlashIndex >= 0) {
              if (lastSlashIndex == 0) {
                  //Do not remove the very first slash
                  lastSlashIndex = 1;
              }
              defaultPath = defaultPath.substring(0, lastSlashIndex);
          }
          return defaultPath;
      }
  
      protected static String getDefaultDomain(final CookieOrigin origin) {
          return origin.getHost();
      }
  
      protected List<Cookie> parse(final HeaderElement[] elems, final CookieOrigin origin)
                  throws MalformedCookieException {
          List<Cookie> cookies = new ArrayList<Cookie>(elems.length);
          for (HeaderElement headerelement : elems) {
              String name = headerelement.getName();
              String value = headerelement.getValue();
              if (name == null || name.length() == 0) {
                  throw new MalformedCookieException("Cookie name may not be empty");
              }
  
              BasicClientCookie cookie = new BasicClientCookie(name, value);
              cookie.setPath(getDefaultPath(origin));
              cookie.setDomain(getDefaultDomain(origin));
  
              // cycle through the parameters
              NameValuePair[] attribs = headerelement.getParameters();
              for (int j = attribs.length - 1; j >= 0; j--) {
                  NameValuePair attrib = attribs[j];
                  String s = attrib.getName().toLowerCase(Locale.ENGLISH);
  
                  cookie.setAttribute(s, attrib.getValue());
  
                  CookieAttributeHandler handler = findAttribHandler(s);
                  if (handler != null) {
                      handler.parse(cookie, attrib.getValue());
                  }
              }
              cookies.add(cookie);
          }
          return cookies;
      }
 
     public void validate(final Cookie cookie, final CookieOrigin origin)
             throws MalformedCookieException {
         if (cookie == null) {
             throw new IllegalArgumentException("Cookie may not be null");
         }
         if (origin == null) {
             throw new IllegalArgumentException("Cookie origin may not be null");
         }
         for (CookieAttributeHandler handler: getAttribHandlers()) {
             handler.validate(cookie, origin);
         }
     }
 
     public boolean match(final Cookie cookie, final CookieOrigin origin) {
         if (cookie == null) {
             throw new IllegalArgumentException("Cookie may not be null");
         }
         if (origin == null) {
             throw new IllegalArgumentException("Cookie origin may not be null");
         }
         for (CookieAttributeHandler handler: getAttribHandlers()) {
             if (!handler.match(cookie, origin)) {
                 return false;
             }
         }
         return true;
     }
 
 }