package net.sf.jhylafax;
   
   import static net.sf.jhylafax.JHylaFAX.i18n;
   import java.util.ArrayList;
   import java.util.Arrays;
   import java.util.LinkedList;
   import java.util.List;
   
   public class ArgsHandler {
  
  	private LinkedList<String> args;
  	private List<String> filenames = new ArrayList<String>();
  	private String logConfigFilename = "logging-default.properties";
  	private List<String> numbers = new ArrayList<String>();
  	private boolean readStdin = false;
  	private boolean quitAfterSending;
  	
  	public ArgsHandler()
  	{
  	}
  	
  	private void error(String error)
  	{
  		System.err.println(error);
  		System.exit(1);
  	}
  
  	public void evaluate(String[] args)
  	{
  		this.args = new LinkedList<String>(Arrays.asList(args));
  		
  		while (hasNext()) {
  			String arg = pop();
  			if (!arg.startsWith("-")) {
  				filenames.add(arg);
  			}
  			else {
  				if ("-n".equals(arg)) {
  					numbers.add(popArg("-n"));
  				}
  				else if ("-d".equals(arg)) {
  					logConfigFilename = "logging-info.properties";
  				}
  				else if ("-dd".equals(arg)) {
  					logConfigFilename = "logging-debug.properties";
  				}
  				else if ("--stdin".equals(arg)) {
  					readStdin = true;
  				}
  				else if ("-q".equals(arg)) {
  					quitAfterSending = true;
  				}
  				else if ("-h".equals(arg) | "-?".equals(arg) | "-help".equals(arg) | "--help".equals(arg)) {
  					System.out.println("Usage: java -jar jhylafax.jar [options] [files]");
  					System.out.println();
  					System.out.println(" -d	            Output debug information to stderr");
  					System.out.println(" -dd            Output more debug information to stderr");
  					System.out.println(" -h --help      Print this help message");
  					System.out.println(" -n number      Send fax to number");
  					System.out.println(" -q	            Quit after sending fax");
  					System.out.println(" --stdin        Read PostScript from stdin");
  					System.exit(0);
  				}
  				else {
  					error(i18n.tr("Invalid parameter. Use -h for help."));
  				}
  			}
  		}
  		
  	}
  	
  	public String[] getFilenames()
  	{
  		return filenames.toArray(new String[0]);
  	}
  	
  	public String getLogConfigFilename()
  	{
  		return logConfigFilename;
  	}
  	
  	public String[] getNumbers()
  	{
  		return numbers.toArray(new String[0]);
  	}
  	
  	public boolean getReadStdin()
  	{
  		return readStdin;
  	}
  	
  	public boolean getQuitAfterSending() 
  	{
  		return quitAfterSending;
  	}
  	
  	private boolean hasNext()
  	{
  		return !args.isEmpty();
 	}
 	
 	private String pop()
 	{
 		return args.remove();
 	}
 
 	private String popArg(String parameter)
 	{
 		if (!hasNext()) {
 			error(i18n.tr("{0} parameter requires argument", parameter));
 		}
 		String arg = pop();
 		if (arg.startsWith("-")) {
 			error(i18n.tr("{0} parameter requires argument", parameter));
 		}
 		return arg;
 	}
 }