package misc;

import java.awt.Color;
import java.awt.Component;
import java.awt.Frame;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.swing.event.HyperlinkEvent;
import javax.swing.event.HyperlinkListener;
import javax.swing.text.html.HTMLDocument;
import javax.swing.text.html.HTMLFrameHyperlinkEvent;

@SuppressWarnings ("serial") public class Guide extends HtmlDialog {

    // ========================================
    static public final int H_SPACE = 5;
    static public final int V_SPACE = 2;

    // ========================================
    Color standardBackground = Color.gray;
    Color highlightColor = Color.orange;
    Component [] component;
    Color [] componentBackgroundColor;
    int next = -1;
    boolean [] done;

    // ========================================
    public Guide (Frame frame, String titleName, String fileName, Component [] component,
		  Color standardBackground, Color highlightColor) {
	super (frame, titleName, fileName);
	this.component = component;
	this.standardBackground = standardBackground;
	this.highlightColor = highlightColor;
	done = new boolean [component.length];
	componentBackgroundColor = new Color [component.length];
	for (int i = 0; i < component.length; i++)
	    if (component [i] != null)
		componentBackgroundColor [i] = component [i].getBackground ();
	reset ();
	editorPane.addHyperlinkListener (new Hyperactive ());
    }

    // ========================================
    class Hyperactive implements HyperlinkListener {
 
	public void hyperlinkUpdate (HyperlinkEvent e) {
	    if (e.getEventType () == HyperlinkEvent.EventType.ACTIVATED) {
		String file = e.getURL ().getPath ();
		String command = file.substring (file.lastIndexOf ("/")+1);
		int idx = command.indexOf ("?");
		if (idx >= 0)
		    command = command.substring (0, idx);
		if ("Reset".equals (command)) {
		    reset ();
		    setNext ();
		} else if (command.startsWith ("ActionG")) {
		    String [] bound = command.substring ("ActionG".length ()).split ("\\-");
		    flipGroup (Integer.parseInt (bound[0]), Integer.parseInt (bound[1]));
		} else if (command.startsWith ("Action"))
		    flipStep (Integer.parseInt (command.substring ("Action".length ())));
		else if (e instanceof HTMLFrameHyperlinkEvent) {
		    HTMLFrameHyperlinkEvent evt = (HTMLFrameHyperlinkEvent) e;
		    HTMLDocument doc = (HTMLDocument) editorPane.getDocument ();
		    doc.processHTMLFrameHyperlinkEvent (evt);
		} else {
		    try {
			editorPane.setPage (e.getURL ());
		    } catch (Throwable t) {
			Log.keepLastException ("Guide::hyperlinkUpdate", t);
		    }
		}
	    }
	}
    }

    // ========================================
    public void setVisible (boolean visible) {
	reset ();
	super.setVisible (visible);
	if (visible) {
	    setNext ();
	    editorPane.scrollToReference ("Top");
	}
    }

    // ========================================
    public void changeHtmlClassAction (String actionName, String className) {
	String newPage = editorPane.getText ().
	    replaceAll ("<div[^>]*name=\"Action("+actionName+")\"[^>]*>",
			"<div name=\"Action$1\" class=\""+className.toLowerCase ()+"\">").
	    replaceAll ("<img[^>]*name=\"Action("+actionName+")\"[^>]*>",
			"<img name=\"Action$1\" border=\"0\" src=\"../images/button/"+className+".png\">");
	editorPane.setText (newPage);
    }

    // ========================================
    public void  reset () {
	next = -1;
	if (done == null)
	    return;
	for (int step = 0; step < done.length; step++) {
	    done [step] = false;
	    if (component [step] != null)
		component [step].setBackground (componentBackgroundColor [step]);
	}
	// XXX pb d'affichage
	editorPane.getText ();
	try {
	    Thread.sleep (200);
	} catch (InterruptedException e) {
	}
	changeHtmlClassAction ("(G[0-9]+-)?[0-9]+", "Unknown");
	editorPane.scrollToReference ("Top");
    }

    // ========================================
    public void  unsetNext () {
	if (next < 0)
	    return;
	changeHtmlClassAction (""+next, "Unknown");
	if (component [next] != null)
	    component [next].setBackground (componentBackgroundColor [next]);
	next = -1;
    }

    // ========================================
    public void  setNext () {
	if (next >= 0 && ! done [next])
	    return;
	next = -1;
	for (int step = 0; step < done.length; step++)
	    if (!done [step]) {
		next = step;
		changeHtmlClassAction (""+next, "Todo");
		if (component [next] != null)
		    component [next].setBackground (highlightColor);
		editorPane.scrollToReference ("Action"+next);
		return;
	    }
    }

    // ========================================
    private void  stepIsDone (int step) {
	done [step] = true;
	changeHtmlClassAction (""+step, "Done");
	if (component [step] != null)
	    component [step].setBackground (componentBackgroundColor [step]);
    }

    // ========================================
    private void  stepIsUnknown (int step) {
	done [step] = false;
	changeHtmlClassAction (""+step, "Unknown");
    }

    // ========================================
    public void  flipStep (int step) {
	unsetNext ();
	if (done [step])
	    stepIsUnknown (step);
	else
	    stepIsDone (step);
	checkGroup ();
	setNext ();
    }

    // ========================================
    public void  flipGroup (int step1, int step2) {
	unsetNext ();
	boolean allDone = true;
	for (int step = step1; step <= step2; step++)
	    if (!done [step]) {
		allDone = false;
		break;
	    }
	if (allDone) {
	    for (int step = step1; step <= step2; step++)
		stepIsUnknown (step);
	    changeHtmlClassAction ("G"+step1+"-"+step2, "Unknown");
	} else {
	    for (int step = step1; step <= step2; step++)
		stepIsDone (step);
	    changeHtmlClassAction ("G"+step1+"-"+step2, "Done");
	}
	checkGroup ();
	setNext ();
    }

    // ========================================
    public void  checkGroup () {
	String newPage = editorPane.getText ();
	Pattern pattern = Pattern.compile ("<img[^>]*name=\"ActionG(([0-9]+)-([0-9]+))\"[^>]*>");
	Matcher matcher = pattern.matcher (newPage);
	while (matcher.find()) {
	    int step1 = Integer.parseInt (matcher.group (2));
	    int step2 = Integer.parseInt (matcher.group (3));
	    boolean allDone = true;
	    for (int step = step1; step <= step2; step++)
		if (!done [step]) {
		    allDone = false;
		    break;
		}
	    changeHtmlClassAction ("G"+step1+"-"+step2, allDone ? "Done" : "Unknown");
	}
    }

    // ========================================
}