package ij.plugin;
import ij.*;
import ij.gui.*;
import ij.util.Tools;
import java.util.*;

/** This plugin implements the Plugins/Utilities/Proxy Settings command. It sets
*   the JVM proxy properties to allow the Help/Update ImageJ command
*   and File/Open Samples menu to work on networks behind a proxy server. 
* 
*     @author   Dimiter Prodanov
*/
public class ProxySettings implements PlugIn {
    private Properties props = System.getProperties();
    private String proxyhost = Prefs.get("proxy.server", "");
    private int proxyport = (int)Prefs.get("proxy.port", 8080);
    
    public void run(String arg) {
        if (IJ.getApplet()!=null) return;
        String host = System.getProperty("http.proxyHost");
        if (host!=null) proxyhost = host;
        String port = System.getProperty("http.proxyPort");
        if (port!=null) {
            double portNumber = Tools.parseDouble(port);
            if (!Double.isNaN(portNumber))
                proxyport = (int)portNumber;
        }
        if (!showDialog()) return;
        if (!proxyhost.equals(""))
            props.put("proxySet", "true");
        else
            props.put("proxySet", "false");
        props.put("http.proxyHost", proxyhost);
        props.put("http.proxyPort", ""+proxyport);
        Prefs.set("proxy.server", proxyhost);
        Prefs.set("proxy.port", proxyport);
        try {
            System.setProperty("java.net.useSystemProxies", Prefs.useSystemProxies?"true":"false");
        } catch(Exception e) {}
        if (IJ.debugMode)
            logProperties();
    }
    
    public void logProperties() {
        IJ.log("proxy set: "+ System.getProperty("proxySet"));
        IJ.log("proxy host: "+ System.getProperty("http.proxyHost"));
        IJ.log("proxy port: "+System.getProperty("http.proxyPort"));
        IJ.log("java.net.useSystemProxies: "+System.getProperty("java.net.useSystemProxies"));
    }

    boolean showDialog()   {
        GenericDialog gd=new GenericDialog("Proxy Settings");
        gd.addStringField("Proxy server:", proxyhost, 15);
        gd.addNumericField("Port:", proxyport , 0);
        gd.addCheckbox("Or, use system proxy settings", Prefs.useSystemProxies);
        gd.addHelp(IJ.URL+"/docs/menus/edit.html#proxy");
        gd.showDialog();
        if (gd.wasCanceled())
            return false;
        proxyhost = gd.getNextString();
        proxyport = (int)gd.getNextNumber();
        Prefs.useSystemProxies = gd.getNextBoolean();
        return true;
    }

}