/*******************************************************************************
 * Copyright (c) 2012 Association for Decentralized Information Management
 * in Industry THTH ry.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors:
 *     VTT Technical Research Centre of Finland - initial API and implementation
 *******************************************************************************/
package org.simantics.maps;

import java.io.IOException;
import java.lang.reflect.InvocationTargetException;
import java.net.HttpURLConnection;
import java.net.InetSocketAddress;
import java.net.MalformedURLException;
import java.net.Proxy;
import java.net.URI;
import java.net.URISyntaxException;
import java.net.URL;
import java.net.URLConnection;
import java.util.Properties;

import org.simantics.maps.pojo.AppletProxyUtil;

/**
 * @author Tuukka Lehtonen
 */
public class WebService {

    protected URI uri;
    protected URL service;

    public WebService(String address) throws URISyntaxException, MalformedURLException {
        this.uri = new URI(address);
        this.service = uri.toURL();
    }
    
    /**
     * Eclipse has different proxy configuration than POJO applications have,
     * and Eclipse proxy code cannot be included in POJO applications.
     * 
     * @return
     */
    private IProxyUtil getProxyUtil() {
        IProxyUtil util = null;
        try {
            Class<?> proxyClass = (Class<?>) Class.forName("org.simantics.maps.eclipse.EclipseProxyUtil");
            util = (IProxyUtil)proxyClass.getDeclaredConstructor().newInstance();
        } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | IllegalArgumentException
                | InvocationTargetException | NoSuchMethodException | SecurityException e) {
        }
        // AppletProxyUtil should exist always..
        if(util == null) {
            util = new AppletProxyUtil();
        }
        return util;
    }

    public URI getURI() {
        return uri;
    }

    public HttpURLConnection openConnection(String file, String query) throws MalformedURLException, IOException {
        HttpURLConnection connection = null;

        String suffix = query != null ? "?"+query : "";
        URL url = new URL(service.getProtocol(), service.getHost(), service.getPort(), service.getFile() +  file + suffix);

        Properties systemProperties = System.getProperties();
        Proxy proxy = getProxyUtil().getProxyService(url.toString());
        if(proxy != null && ((InetSocketAddress)proxy.address()) != null) {
            systemProperties.setProperty("http.proxyHost", ((InetSocketAddress)proxy.address()).getHostName());
            systemProperties.setProperty("http.proxyPort", ""+((InetSocketAddress)proxy.address()).getPort());
        }

        URLConnection con = url.openConnection();
        if(con instanceof HttpURLConnection) {
            connection = (HttpURLConnection)con;
            connection.setConnectTimeout(10000);
            connection.connect();
        }
        return connection;
    }

}