/*
 * Copyright 2007 Yusuke Yamamoto
 *
 * 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
 *
 * 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.
 */

package com.dwdesign.tweetings.util.httpclient;

import java.io.IOException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.zip.GZIPInputStream;

import org.apache.http.Header;
import org.apache.http.HeaderElement;
import org.apache.http.HttpResponse;

import twitter4j.internal.http.HttpClientConfiguration;

/**
 * @author Yusuke Yamamoto - yusuke at mac.com
 * @since Twitter4J 2.1.2
 */
final class ApacheHttpClientHttpResponseImpl extends twitter4j.internal.http.HttpResponse {
	private final HttpResponse res;

	ApacheHttpClientHttpResponseImpl(final HttpResponse res, final HttpClientConfiguration conf) throws IOException {
		super(conf);
		this.res = res;
		is = res.getEntity().getContent();
		statusCode = res.getStatusLine().getStatusCode();
		if (is != null && "gzip".equals(getResponseHeader("Content-Encoding"))) {
			// the response is gzipped
			is = new GZIPInputStream(is);
		}
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public void disconnect() throws IOException {
		if (res != null) {
			res.getEntity().consumeContent();
		}
	}

	/**
	 * {@inheritDoc}
	 */
	@Override
	public final String getResponseHeader(final String name) {
		final Header[] headers = res.getHeaders(name);
		if (headers != null && headers.length > 0)
			return headers[0].getValue();
		else
			return null;
	}

	@Override
	public Map<String, List<String>> getResponseHeaderFields() {
		final Header[] headers = res.getAllHeaders();
		final Map<String, List<String>> maps = new HashMap<String, List<String>>();
		for (final Header header : headers) {
			final HeaderElement[] elements = header.getElements();
			for (final HeaderElement element : elements) {
				List<String> values;
				if (null == (values = maps.get(element.getName()))) {
					values = new ArrayList<String>(1);
					maps.put(element.getName(), values);
				}
				values.add(element.getValue());
			}
		}
		return maps;
	}
}