package config;


import java.io.IOException;
import java.net.ProxySelector;

import org.apache.log4j.Logger;

import com.btr.proxy.search.ProxySearch;
import com.btr.proxy.search.wpad.WpadProxySearchStrategy;
import com.btr.proxy.util.ProxyException;

/**
 * Configures the proxy
 * 
 * @author Jonathan Bauer
 */

public class ConfigProxy {

	/**
	 * Logger for this class
	 */
	private final static Logger LOGGER = Logger.getLogger(ConfigProxy.class);

	/**
	 * Initialization method.
	 */
	public static void init() throws IOException {
		// try to find local proxy settings
		ProxySearch proxySearch = ProxySearch.getDefaultProxySearch();
		ProxySelector myProxySelector = proxySearch.getProxySelector();
		
		if (myProxySelector == null) {
			// didn't work, try WPAD detection
			LOGGER.error("No suitable proxy settings found, trying WPAD...");
			WpadProxySearchStrategy ss = new WpadProxySearchStrategy();
			try {
				myProxySelector = ss.getProxySelector();
			} catch (ProxyException e) {
				LOGGER.error("WPAD proxy error, see trace: ", e);
			}
		}
		// final check to see if WPAD actually worked
		if (myProxySelector != null) {
			LOGGER.debug("Proxy initialised.");
			ProxySelector.setDefault(myProxySelector);
		} else {
			LOGGER.error("Could not find a suitable proxy!");
		}
	}
}