/*
    * Created on 09-Feb-2005
    */
   package uk.ac.roe.antigen.textcomponents;
   
   import java.io.BufferedInputStream;
   import java.io.DataInputStream;
   import java.io.IOException;
   import java.util.ArrayList;
  import java.util.Hashtable;
  import java.util.Iterator;
  import java.util.List;
  import java.util.Vector;
  import java.util.logging.Logger;
  
  import org.apache.tools.ant.Project;
  import org.apache.tools.ant.Target;
  
  import sun.rmi.runtime.Log;
  import uk.ac.roe.antigen.builder.TargetChooser;
  import uk.ac.roe.antigen.utils.Config;
  
  /***
   * A Text version of the TargetChoiceFrame
   * 
   * @author jdt
   */
  public class TextTargetChooser implements TargetChooser {
      /***
       * Logger for this class
       */
      private static final Logger logger = Logger.getLogger(TextTargetChooser.class.getName());
  
  
  	/***
  	 * Auto-generated main method to display this JDialog
  	 */
  	public static void main(String[] args) {
  		Config.load("/config.properties");
  		Config.setProperty(ANTIGEN_TARGETS, "foo,bar,not,eek");
  		Config.setProperty(ANTIGEN_TARGET_ + "foo.selected", "true");
  		Config.setProperty(ANTIGEN_TARGET_ + "bar.selected", "false");
  		Config.setProperty(ANTIGEN_TARGET_ + "not.selected", "true");
  
  		Project project2 = new Project();
  		Target target = new Target();
  		target.setName("foo");
  		target.setDescription("Foos description");
  		project2.addTarget(target);
  
  		target = new Target();
  		target.setName("bar");
  		project2.addTarget(target);
  		target = new Target();
  		target.setName("eek");
  		project2.addTarget(target);
  
  		TargetChooser inst = new TextTargetChooser(project2);
  
  		List targets = inst.showAndWaitForResponse();
  		System.out.println("Selected tasks:");
  		Iterator it = targets.iterator();
  		while (it.hasNext()) {
  			String taskName = (String) it.next();
  			System.out.println(taskName);
  		}
  	}
  
  	private Project project;
  
  	public TextTargetChooser(Project project) {
  		this.project = project;
  		setUpTasks();
  	}
  
  	/***
  	 * Parse the list of targets and set up the checkboxes accordingly
  	 */
  	private void setUpTasks() {
  		String targetString = Config.getProperty(ANTIGEN_TARGETS);
  		logger.fine("Found targets: " + targetString);
  		if (targetString == null) {
  			return;
  		}
  		Hashtable projectTargets = project.getTargets();
  		String[] targets = targetString.split(",");
  		logger.fine("Split into " + targets.length);
  		for (int i = 0; i < targets.length; ++i) {
  			String targetName = targets[i];
  			Target target = (Target) projectTargets.get(targetName);
  			if (target != null) {
  				String description = target.getDescription();
  				String selectedOpt = Config.getProperty(ANTIGEN_TARGET_
  						+ targetName + ".selected");
  				boolean selected = true;
  				if ("false".equals(selectedOpt)) {
  					selected = false;
  				}
  				taskDescs.add(new TaskDescription(targetName, description,
 						selected));
 				logger.fine("Target " + targetName + " found (" + description
 						+ ").  Is selected initially? " + selected);
 			} else {
 				logger.fine("Target " + targetName
 						+ " not found in project, skipping");
 			}
 		}
 
 	}
 
 	private List taskDescs = new ArrayList();
 
 	private class TaskDescription {
 
 		private String name;
 
 		private String description;
 
 		private boolean defaultSelected;
 
 		private String label;
 
 		public TaskDescription(String name, String description, boolean selected) {
 			this.name = name;
 			this.description = description;
 			this.defaultSelected = selected;
 			assert name != null;
 			label = description != null ? description : name;
 		}
 
 		public boolean isSelectedByDefault() {
 			return defaultSelected;
 		}
 
 		/***
 		 * @return Returns the label.
 		 */
 		public String getLabel() {
 			return label;
 		}
 
 		/***
 		 * @return Returns the description.
 		 */
 		public String getDescription() {
 			return description;
 		}
 
 		/***
 		 * @return Returns the name.
 		 */
 		public String getName() {
 			return name;
 		}
 	}
 
 	/***
 	 * Display the dialog and return an array of the selected options
 	 * 
 	 * @return
 	 */
 	public Vector showAndWaitForResponse() {
 		showChoices();
 		System.out
 				.println("---Enter choices as a comma-separated list, or press return to accept the [defaults]");
 
 		DataInputStream dataInputStream = new DataInputStream(
 				new BufferedInputStream(System.in));
 		boolean unhappy = true;
 		Vector theChosen=null;
 		while (unhappy) {
 			theChosen = new Vector();
 			String input;
 			try {
 				logger.fine("Waiting for input");
 				input = dataInputStream.readLine().trim();
 			} catch (IOException e) {
 				//ignore and retry
 				logger.warning(e.getMessage());
 				break;
 			}
 			logger.fine("Input: |" + input + "|");
 			if ("".equals(input)) {
 				logger.fine("return pressed - selecting defaults");
 				Iterator it = taskDescs.iterator();
 				while (it.hasNext()) {
 					TaskDescription desc = (TaskDescription) it.next();
 					if (desc.isSelectedByDefault()) theChosen.add(desc.getName());
 				}
 				unhappy = false;
 			} else {
 				String[] choices = input.split(",");
 				for (int i = 0; i < choices.length; ++i) {
                     unhappy = false;
 					try {
 						int choice = Integer.parseInt(choices[i]);
 						if (choice < 1 || choice > taskDescs.size()) {
 							System.out.println("Choosing "+choice+" is invalid");
 							unhappy=true;
                             break;
 						} else {
 							TaskDescription taskDescription = (TaskDescription)taskDescs.get(choice-1);
 							theChosen.add(taskDescription.getName());
                         }
 					} catch (NumberFormatException e1) {
 						//e1.printStackTrace();
 						System.out
 								.println("Invalid entry - must be a comma-separated list of numbers");
 						unhappy=true;
                         break;
 					}
 
 				}
 
 				
 			}
 		}
 		logger.fine("Choice made");
 
 		return theChosen;
 	}
 
 	/***
 	 * Display the choices of tasks to the user
 	 */
 	private void showChoices() {
 		System.out.println("Please select from the following tasks:");
 		for (int i = 0; i < taskDescs.size(); ++i) {
 			TaskDescription description = (TaskDescription) taskDescs.get(i);
 			String prompt = description.isSelectedByDefault() ? "["
 					+ Integer.toString(i + 1) + "]" : " "
 					+ Integer.toString(i + 1) + " ";
 			System.out.println(prompt + " - " + description.getLabel());
 		}
 	}
 
 }