package org.owasp.webgoat.lessons;

import java.io.BufferedReader;
import java.io.FileReader;
import java.util.ArrayList;
import java.util.List;
import org.apache.ecs.Element;
import org.apache.ecs.ElementContainer;
import org.apache.ecs.StringElement;
import org.apache.ecs.html.Center;
import org.apache.ecs.html.H3;
import org.apache.ecs.html.IMG;
import org.apache.ecs.html.P;
import org.apache.ecs.html.PRE;
import org.apache.ecs.html.TD;
import org.apache.ecs.html.TR;
import org.apache.ecs.html.Table;
import org.owasp.webgoat.session.WebSession;


/***************************************************************************************************
 * 
 * 
 * This file is part of WebGoat, an Open Web Application Security Project utility. For details,
 * please see http://www.owasp.org/
 * 
 * Copyright (c) 2002 - 2007 Bruce Mayhew
 * 
 * This program is free software; you can redistribute it and/or modify it under the terms of the
 * GNU General Public License as published by the Free Software Foundation; either version 2 of the
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
 * General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License along with this program; if
 * not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
 * 02111-1307, USA.
 * 
 * Getting Source ==============
 * 
 * Source for this application is maintained at code.google.com, a repository for free software
 * projects.
 * 
 * For details, please see http://code.google.com/p/webgoat/
 * 
 * @author Bruce Mayhew <a href="http://code.google.com/p/webgoat">WebGoat</a>
 * @created October 28, 2003
 */
public abstract class LessonAdapter extends AbstractLesson
{

	/**
	 * Description of the Method
	 * 
	 * @param s
	 *            Description of the Parameter
	 * @return Description of the Return Value
	 */
	protected Element createContent(WebSession s)
	{
		// Mark this lesson as completed.
		makeSuccess(s);

		ElementContainer ec = new ElementContainer();

		ec.addElement(new Center().addElement(new H3().addElement(new StringElement(
				"Detailed Lesson Creation Instructions."))));
		ec.addElement(new P());
		ec
				.addElement(new StringElement(
						"Lesson are simple to create and very little coding is required. &nbsp;&nbsp;"
								+ "In fact, most lessons can be created by following the easy to use instructions in the "
								+ "<A HREF=http://www.owasp.org/index.php/WebGoat_User_and_Install_Guide_Table_of_Contents>WebGoat User Guide.</A>&nbsp;&nbsp;"
								+ "If you would prefer, send your lesson ideas to "
								+ getWebgoatContext().getFeedbackAddress()));

		String fileName = s.getContext().getRealPath("doc/New Lesson Instructions.txt");
		if (fileName != null)
		{
			try
			{
				PRE pre = new PRE();
				BufferedReader in = new BufferedReader(new FileReader(fileName));
				String line = null;
				while ((line = in.readLine()) != null)
				{
					pre.addElement(line + "\n");
				}
				ec.addElement(pre);
			} catch (Exception e)
			{
				e.printStackTrace();
			}
		}
		return (ec);
	}

	/**
	 * Gets the category attribute of the LessonAdapter object. The default category is "General"
	 * Only override this method if you wish to create a new category or if you wish this lesson to
	 * reside within a category other the "General"
	 * 
	 * @return The category value
	 */
	protected Category getDefaultCategory()
	{
		return Category.GENERAL;
	}

	protected boolean getDefaultHidden()
	{
		return false;
	}

	private final static Integer DEFAULT_RANKING = new Integer(1000);

	protected Integer getDefaultRanking()
	{
		return DEFAULT_RANKING;
	}

	/**
	 * Gets the hintCount attribute of the LessonAdapter object
	 * 
	 * @return The hintCount value
	 */
	public int getHintCount(WebSession s)
	{
		return getHints(s).size();
	}

	/**
	 * Fill in a minor hint that will help people who basically get it, but are stuck on somthing
	 * silly. Hints will be returned to the user in the order they appear below. The user must click
	 * on the "next hint" button before the hint will be displayed.
	 * 
	 * @return The hint1 value
	 */
	protected List<String> getHints(WebSession s)
	{
		List<String> hints = new ArrayList<String>();
		hints.add("There are no hints defined.");

		return hints;
	}

	public String getHint(WebSession s, int hintNumber)
	{
		return (String) getHints(s).get(hintNumber);
	}

	/**
	 * Gets the credits attribute of the AbstractLesson object
	 * 
	 * @return The credits value
	 */
	public Element getCredits()
	{
		return new StringElement();
	}

	/**
	 * Gets the instructions attribute of the LessonAdapter object. Instructions will rendered as
	 * html and will appear below the control area and above the actual lesson area. Instructions
	 * should provide the user with the general setup and goal of the lesson.
	 * 
	 * @return The instructions value
	 */
	public String getInstructions(WebSession s)
	{
		StringBuffer buff = new StringBuffer();
		try
		{
			String fileName = s.getWebResource(getLessonPlanFileName());
			if (fileName != null)
			{
				BufferedReader in = new BufferedReader(new FileReader(fileName));
				String line = null;
				boolean startAppending = false;
				while ((line = in.readLine()) != null)
				{
					if (line.indexOf("<!-- Start Instructions -->") != -1)
					{
						startAppending = true;
						continue;
					}
					if (line.indexOf("<!-- Stop Instructions -->") != -1)
					{
						startAppending = false;
						continue;
					}
					if (startAppending)
					{
						buff.append(line + "\n");
					}
				}
			}
		} catch (Exception e)
		{
		}

		return buff.toString();

	}

	/**
	 * Fill in a descriptive title for this lesson. The title of the lesson. This will appear above
	 * the control area at the top of the page. This field will be rendered as html.
	 * 
	 * @return The title value
	 */
	public String getTitle()
	{
		return "Untitled Lesson " + getScreenId();
	}

	public String getCurrentAction(WebSession s)
	{
		return s.getLessonSession(this).getCurrentLessonScreen();
	}

	public void setCurrentAction(WebSession s, String lessonScreen)
	{
		s.getLessonSession(this).setCurrentLessonScreen(lessonScreen);
	}

	public Object getSessionAttribute(WebSession s, String key)
	{
		return s.getRequest().getSession().getAttribute(key);
	}

	public void setSessionAttribute(WebSession s, String key, Object value)
	{
		s.getRequest().getSession().setAttribute(key, value);
	}

	/**
	 * Description of the Method
	 * 
	 * @param s
	 *            Description of the Parameter
	 * @return Description of the Return Value
	 */
	protected Element makeSuccess(WebSession s)
	{
		getLessonTracker(s).setCompleted(true);

		s.setMessage("Congratulations. You have successfully completed this lesson.");

		return (null);
	}

	/**
	 * Gets the credits attribute of the AbstractLesson object
	 * 
	 * @return The credits value
	 */
	protected Element getCustomCredits(String text, Element e)
	{
		Table t = new Table().setCellSpacing(0).setCellPadding(0).setBorder(0).setWidth("90%").setAlign("RIGHT");
		TR tr = new TR();
		tr.addElement(new TD(text).setVAlign("MIDDLE").setAlign("RIGHT").setWidth("100%"));
		tr.addElement(new TD(e).setVAlign("MIDDLE").setAlign("RIGHT"));
		t.addElement(tr);
		return t;
	}

}