package com.digi.config.util;

import java.io.*;
import java.applet.*;
import java.net.*;


/**
 * HelpDisplay is a utility class to display html help text based on a key to a help bundle.
 */
public class HelpDisplay {


    static Applet applet = null;

    public static void setApplet(Applet applet) {
        HelpDisplay.applet = applet;
    }


    /**
     * This method shows the html file in a new browser window
     * <p>
     * @param  key   Key for the resource file, the value will be the html file to display
     */
    public static void showHelp(String key) {
        // Determine which help file to show
        String helpFileName=ConfigResource.getHelpRbString(key);

        if (applet!=null) {
            // Running as an applet... Display help using applet context
            try {
                URL docBase = applet.getDocumentBase();
                //System.out.println("Doc base = "+docBase.toString());
                int fileNamePos = docBase.getPath().lastIndexOf("/");
                String path = docBase.getPath().substring(0, fileNamePos);
                //System.out.println("path = "+path);
                if (!path.endsWith("/")) {
                    path += "/"; 
                }
                URL helpUrl = new URL(docBase.getProtocol(), docBase.getHost(), path+helpFileName);
                applet.getAppletContext().showDocument(helpUrl, "Configuration Help");
            } catch (MalformedURLException e) {
                SystemLog.log("InvalidHelpURL", new Serializable[] {helpFileName}, e);
            }
        } else {     
            // Running as an application... display help in browser window
            String fullHelpFileName=PathLocater.locateFile(helpFileName);

            if (fullHelpFileName!=null) {
                // If we found the help file, then define the url and display it
                String url=fullHelpFileName;
                String cmd;
                try {
                    String osname=System.getProperty("os.name");
                    if (osname.startsWith("Win")) {
                        cmd="rundll32" +" " +
                            "url.dll,FileProtocolHandler" +" " +url;
                    }
                    else { // Apple
                        cmd="open" +" " +url;
                    }
                    SystemLog.debug("OS name is : " +osname);
                    SystemLog.debug("Cmd is : " +cmd);
                    Runtime.getRuntime().exec(cmd);
                }
                catch (Exception ex) {
                    SystemLog.log(ex);
                }
            }
            else {
                SystemLog.log("MissingHelpFile",
                    new Serializable[] { helpFileName },
                    new Serializable[] { key, helpFileName });
            }
        }
        }

}