/*
 * Copyright 2014 Federal Chancellery Austria
 * MOA-ID has been developed in a cooperation between BRZ, the Federal
 * Chancellery Austria - ICT staff unit, and Graz University of Technology.
 *
 * Licensed under the EUPL, Version 1.1 or - as soon they will be approved by
 * the European Commission - subsequent versions of the EUPL (the "Licence");
 * You may not use this work except in compliance with the Licence.
 * You may obtain a copy of the Licence at:
 * http://www.osor.eu/eupl/
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the Licence is distributed on an "AS IS" basis,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the Licence for the specific language governing permissions and
 * limitations under the Licence.
 *
 * This product combines work with different licenses. See the "NOTICE" text
 * file for details on the various modules and licenses.
 * The "NOTICE" text file is part of the distribution. Any derivative works
 * that you distribute must include a readable copy of the "NOTICE" text file.
 */
package at.gv.egovernment.moa.id.commons.utils;

import javax.net.ssl.HostnameVerifier;
import javax.net.ssl.SSLSocketFactory;

import org.apache.http.HttpHost;
import org.apache.http.auth.AuthScope;
import org.apache.http.auth.UsernamePasswordCredentials;
import org.apache.http.client.CredentialsProvider;
import org.apache.http.conn.ssl.DefaultHostnameVerifier;
import org.apache.http.conn.ssl.NoopHostnameVerifier;
import org.apache.http.conn.ssl.SSLConnectionSocketFactory;
import org.apache.http.impl.client.BasicCredentialsProvider;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.impl.client.HttpClients;

import at.gv.egovernment.moa.logging.Logger;
import at.gv.egovernment.moa.util.MiscUtil;

/**
 * @author tlenz
 *
 */
public class HttpClientWithProxySupport {
		
	public static CloseableHttpClient getHttpClient(SSLSocketFactory sSLSocketFactory, boolean validateHostname) {
		
		HttpClientBuilder clientBuilder = HttpClients.custom();
		
		//set proxy functionality
		String host = System.getProperty("http.proxyHost"); //$NON-NLS-1$
		String port = System.getProperty("http.proxyPort"); //$NON-NLS-1$		
		int p = -1;
		
		if (MiscUtil.isNotEmpty(host) && MiscUtil.isNotEmpty(port)) {
			p = Integer.parseInt(port);
			HttpHost proxy = null;
			if (host.startsWith("https"))
				proxy = new HttpHost(host, p, "https");
			else
				proxy = new HttpHost(host, p, "http");
													
			clientBuilder.setProxy(proxy);
	
			Logger.info("Initial HTTPClient with proxy usage. " +
					"ProxyHost=" + host +
					" ProxyPort=" + port);
	
			String user = System.getProperty("http.proxyUser"); //$NON-NLS-1$
			String pass = System.getProperty("http.proxyPassword"); //$NON-NLS-1$
			if (MiscUtil.isNotEmpty(user) && pass != null) {				
				CredentialsProvider credsProvider = new BasicCredentialsProvider();
				credsProvider.setCredentials(new AuthScope(host, p), new UsernamePasswordCredentials(user, pass));
				
			}			
		}
	
		//set SSL context
		if (sSLSocketFactory != null) {			
			HostnameVerifier hostnameVerifier = null;
			
			//set hostName validation filter
			if (validateHostname)
				hostnameVerifier = new DefaultHostnameVerifier();						
			else
				hostnameVerifier = new NoopHostnameVerifier();
			
			clientBuilder.setSSLSocketFactory(
					new SSLConnectionSocketFactory(sSLSocketFactory, hostnameVerifier));
			
		}
		

						 
		return clientBuilder.build();
	}
}