/*
    * Copyright (C) 2010, Google Inc.
    * and other copyright owners as documented in the project's IP log.
    *
    * This program and the accompanying materials are made available
    * under the terms of the Eclipse Distribution License v1.0 which
    * accompanies this distribution, is reproduced below, and is
    * available at http://www.eclipse.org/org/documents/edl-v10.php
    *
   * All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or
   * without modification, are permitted provided that the following
   * conditions are met:
   *
   * - Redistributions of source code must retain the above copyright
   *   notice, this list of conditions and the following disclaimer.
   *
   * - Redistributions in binary form must reproduce the above
   *   copyright notice, this list of conditions and the following
   *   disclaimer in the documentation and/or other materials provided
   *   with the distribution.
   *
   * - Neither the name of the Eclipse Foundation, Inc. nor the
   *   names of its contributors may be used to endorse or promote
   *   products derived from this software without specific prior
   *   written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
   * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
   * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
   * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
   * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
   * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
   * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
   * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  package org.eclipse.jgit.junit.http;
  
  import java.util.Collections;
  import java.util.Enumeration;
  import java.util.Map;
  import java.util.TreeMap;
  
  import org.eclipse.jetty.server.Request;
  import org.eclipse.jetty.server.Response;
  
  /** A single request made through {@link AppServer}. */
  public class AccessEvent {
  	private final String method;
  
  	private final String uri;
  
  	private final Map<String, String> requestHeaders;
  
  	private final Map<String, String[]> parameters;
  
  	private final int status;
  
  	private final Map<String, String> responseHeaders;
  
  	AccessEvent(final Request req, final Response rsp) {
  		method = req.getMethod();
  		uri = req.getRequestURI();
  		requestHeaders = cloneHeaders(req);
  		parameters = clone(req.getParameterMap());
  
  		status = rsp.getStatus();
  		responseHeaders = cloneHeaders(rsp);
  	}
  
  	private static Map<String, String> cloneHeaders(final Request req) {
  		Map<String, String> r = new TreeMap<String, String>();
  		Enumeration hn = req.getHeaderNames();
  		while (hn.hasMoreElements()) {
  			String key = (String) hn.nextElement();
  			if (!r.containsKey(key)) {
  				r.put(key, req.getHeader(key));
  			}
  		}
  		return Collections.unmodifiableMap(r);
  	}
  
  	private static Map<String, String> cloneHeaders(final Response rsp) {
  		Map<String, String> r = new TreeMap<String, String>();
  		Enumeration<String> hn = rsp.getHttpFields().getFieldNames();
  		while (hn.hasMoreElements()) {
  			String key = hn.nextElement();
  			if (!r.containsKey(key)) {
  				Enumeration<String> v = rsp.getHttpFields().getValues(key);
  				r.put(key, v.nextElement());
  			}
  		}
 		return Collections.unmodifiableMap(r);
 	}
 
 	@SuppressWarnings("unchecked")
 	private static Map<String, String[]> clone(Map parameterMap) {
 		return new TreeMap<String, String[]>(parameterMap);
 	}
 
 	/** @return {@code "GET"} or {@code "POST"} */
 	public String getMethod() {
 		return method;
 	}
 
 	/** @return path of the file on the server, e.g. {@code /git/HEAD}. */
 	public String getPath() {
 		return uri;
 	}
 
 	/**
 	 * @param name
 	 *            name of the request header to read.
 	 * @return first value of the request header; null if not sent.
 	 */
 	public String getRequestHeader(String name) {
 		return requestHeaders.get(name);
 	}
 
 	/**
 	 * @param name
 	 *            name of the request parameter to read.
 	 * @return first value of the request parameter; null if not sent.
 	 */
 	public String getParameter(String name) {
 		String[] r = parameters.get(name);
 		return r != null && 1 <= r.length ? r[0] : null;
 	}
 
 	/** @return all parameters in the request. */
 	public Map<String, String[]> getParameters() {
 		return parameters;
 	}
 
 	/** @return HTTP status code of the response, e.g. 200, 403, 500. */
 	public int getStatus() {
 		return status;
 	}
 
 	/**
 	 * @param name
 	 *            name of the response header to read.
 	 * @return first value of the response header; null if not sent.
 	 */
 	public String getResponseHeader(String name) {
 		return responseHeaders.get(name);
 	}
 
 	public String toString() {
 		StringBuilder b = new StringBuilder();
 		b.append(method);
 		b.append(' ');
 		b.append(uri);
 		if (!parameters.isEmpty()) {
 			b.append('?');
 			boolean first = true;
 			for (Map.Entry<String, String[]> e : parameters.entrySet()) {
 				for (String val : e.getValue()) {
 					if (!first) {
 						b.append('&');
 					}
 					first = false;
 
 					b.append(e.getKey());
 					b.append('=');
 					b.append(val);
 				}
 			}
 		}
 		b.append(' ');
 		b.append(status);
 		return b.toString();
 	}
 }