package org.owasp.webgoat.lessons.CrossSiteScripting;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.PreparedStatement;
import java.sql.Statement;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.servlet.http.HttpServletRequest;
import org.owasp.webgoat.lessons.GoatHillsFinancial.DefaultLessonAction;
import org.owasp.webgoat.lessons.GoatHillsFinancial.GoatHillsFinancial;
import org.owasp.webgoat.lessons.GoatHillsFinancial.LessonAction;
import org.owasp.webgoat.session.Employee;
import org.owasp.webgoat.session.ParameterNotFoundException;
import org.owasp.webgoat.session.ParameterParser;
import org.owasp.webgoat.session.UnauthenticatedException;
import org.owasp.webgoat.session.UnauthorizedException;
import org.owasp.webgoat.session.ValidationException;
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
 * even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
 * 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/
 */
public class UpdateProfile extends DefaultLessonAction
{

	private LessonAction chainedAction;

	public UpdateProfile(GoatHillsFinancial lesson, String lessonName, String actionName, LessonAction chainedAction)
	{
		super(lesson, lessonName, actionName);
		this.chainedAction = chainedAction;
	}

	public void handleRequest(WebSession s) throws ParameterNotFoundException, UnauthenticatedException,
			UnauthorizedException, ValidationException
	{
		if (isAuthenticated(s))
		{
			int userId = getIntSessionAttribute(s, getLessonName() + "." + CrossSiteScripting.USER_ID);

			int subjectId = s.getParser().getIntParameter(CrossSiteScripting.EMPLOYEE_ID, 0);

			Employee employee = null;
			try
			{
				employee = parseEmployeeProfile(subjectId, s);
			} catch (ValidationException e)
			{
				if (CrossSiteScripting.STAGE2.equals(getStage(s)))
				{
					setStageComplete(s, CrossSiteScripting.STAGE2);
				}
				throw e;
			}

			if (subjectId > 0)
			{
				this.changeEmployeeProfile(s, userId, subjectId, employee);
				setRequestAttribute(s, getLessonName() + "." + CrossSiteScripting.EMPLOYEE_ID, Integer
						.toString(subjectId));
			}
			else
				this.createEmployeeProfile(s, userId, employee);

			try
			{
				chainedAction.handleRequest(s);
			} catch (UnauthenticatedException ue1)
			{
				// System.out.println("Internal server error");
				ue1.printStackTrace();
			} catch (UnauthorizedException ue2)
			{
				// System.out.println("Internal server error");
				ue2.printStackTrace();
			}
		}
		else
			throw new UnauthenticatedException();
	}

	protected Employee parseEmployeeProfile(int subjectId, WebSession s) throws ParameterNotFoundException,
			ValidationException
	{
		// The input validation can be added using a parsing component
		// or by using an inline regular expression. The parsing component
		// is the better solution.

		HttpServletRequest request = s.getRequest();
		String firstName = request.getParameter(CrossSiteScripting.FIRST_NAME);
		String lastName = request.getParameter(CrossSiteScripting.LAST_NAME);
		String ssn = request.getParameter(CrossSiteScripting.SSN);
		String title = request.getParameter(CrossSiteScripting.TITLE);
		String phone = request.getParameter(CrossSiteScripting.PHONE_NUMBER);
		String address1 = request.getParameter(CrossSiteScripting.ADDRESS1);
		String address2 = request.getParameter(CrossSiteScripting.ADDRESS2);
		int manager = Integer.parseInt(request.getParameter(CrossSiteScripting.MANAGER));
		String startDate = request.getParameter(CrossSiteScripting.START_DATE);
		int salary = Integer.parseInt(request.getParameter(CrossSiteScripting.SALARY));
		String ccn = request.getParameter(CrossSiteScripting.CCN);
		int ccnLimit = Integer.parseInt(request.getParameter(CrossSiteScripting.CCN_LIMIT));
		String disciplinaryActionDate = request.getParameter(CrossSiteScripting.DISCIPLINARY_DATE);
		String disciplinaryActionNotes = request.getParameter(CrossSiteScripting.DISCIPLINARY_NOTES);
		String personalDescription = request.getParameter(CrossSiteScripting.DESCRIPTION);

		Employee employee = new Employee(subjectId, firstName, lastName, ssn, title, phone, address1, address2,
				manager, startDate, salary, ccn, ccnLimit, disciplinaryActionDate, disciplinaryActionNotes,
				personalDescription);

		return employee;
	}

	protected Employee parseEmployeeProfile_BACKUP(int subjectId, WebSession s) throws ParameterNotFoundException,
			ValidationException
	{
		// The input validation can be added using a parsing component
		// or by using an inline regular expression. The parsing component
		// is the better solution.

		HttpServletRequest request = s.getRequest();
		String firstName = request.getParameter(CrossSiteScripting.FIRST_NAME);
		String lastName = request.getParameter(CrossSiteScripting.LAST_NAME);
		String ssn = request.getParameter(CrossSiteScripting.SSN);
		String title = request.getParameter(CrossSiteScripting.TITLE);
		String phone = request.getParameter(CrossSiteScripting.PHONE_NUMBER);
		String address1 = request.getParameter(CrossSiteScripting.ADDRESS1);
		String address2 = request.getParameter(CrossSiteScripting.ADDRESS2);
		int manager = Integer.parseInt(request.getParameter(CrossSiteScripting.MANAGER));
		String startDate = request.getParameter(CrossSiteScripting.START_DATE);
		int salary = Integer.parseInt(request.getParameter(CrossSiteScripting.SALARY));
		String ccn = request.getParameter(CrossSiteScripting.CCN);
		int ccnLimit = Integer.parseInt(request.getParameter(CrossSiteScripting.CCN_LIMIT));
		String disciplinaryActionDate = request.getParameter(CrossSiteScripting.DISCIPLINARY_DATE);
		String disciplinaryActionNotes = request.getParameter(CrossSiteScripting.DISCIPLINARY_NOTES);
		String personalDescription = request.getParameter(CrossSiteScripting.DESCRIPTION);

		Employee employee = new Employee(subjectId, firstName, lastName, ssn, title, phone, address1, address2,
				manager, startDate, salary, ccn, ccnLimit, disciplinaryActionDate, disciplinaryActionNotes,
				personalDescription);

		return employee;
	}

	protected Employee doParseEmployeeProfile(int subjectId, ParameterParser parser) throws ParameterNotFoundException,
			ValidationException
	{
		// Fix this method using the org.owasp.webgoat.session.ParameterParser class
		return null;
	}

	public String getNextPage(WebSession s)
	{
		return CrossSiteScripting.VIEWPROFILE_ACTION;
	}

	public void changeEmployeeProfile(WebSession s, int userId, int subjectId, Employee employee)
			throws UnauthorizedException
	{
		try
		{
			// Note: The password field is ONLY set by ChangePassword
			String query = "UPDATE employee SET first_name = ?, last_name = ?, ssn = ?, title = ?, phone = ?, address1 = ?, address2 = ?,"
					+ " manager = ?, start_date = ?, ccn = ?, ccn_limit = ?,"
					+ " personal_description = ? WHERE userid = ?;";
			try
			{
				PreparedStatement ps = WebSession.getConnection(s).prepareStatement(query,
																					ResultSet.TYPE_SCROLL_INSENSITIVE,
																					ResultSet.CONCUR_READ_ONLY);

				ps.setString(1, employee.getFirstName());
				ps.setString(2, employee.getLastName());
				ps.setString(3, employee.getSsn());
				ps.setString(4, employee.getTitle());
				ps.setString(5, employee.getPhoneNumber());
				ps.setString(6, employee.getAddress1());
				ps.setString(7, employee.getAddress2());
				ps.setInt(8, employee.getManager());
				ps.setString(9, employee.getStartDate());
				ps.setString(10, employee.getCcn());
				ps.setInt(11, employee.getCcnLimit());
				ps.setString(12, employee.getPersonalDescription());
				ps.setInt(13, subjectId);
				ps.execute();
			} catch (SQLException sqle)
			{
				s.setMessage("Error updating employee profile");
				sqle.printStackTrace();
			}

		} catch (Exception e)
		{
			s.setMessage("Error updating employee profile");
			e.printStackTrace();
		}
	}

	public void doChangeEmployeeProfile_BACKUP(WebSession s, int userId, int subjectId, Employee employee)
			throws UnauthorizedException
	{
		try
		{
			// Note: The password field is ONLY set by ChangePassword
			String query = "UPDATE employee SET first_name = ?, last_name = ?, ssn = ?, title = ?, phone = ?, address1 = ?, address2 = ?,"
					+ " manager = ?, start_date = ?, ccn = ?, ccn_limit = ?,"
					+ " personal_description = ? WHERE userid = ?;";
			try
			{
				PreparedStatement ps = WebSession.getConnection(s).prepareStatement(query,
																					ResultSet.TYPE_SCROLL_INSENSITIVE,
																					ResultSet.CONCUR_READ_ONLY);

				ps.setString(1, employee.getFirstName());
				ps.setString(2, employee.getLastName());
				ps.setString(3, employee.getSsn());
				ps.setString(4, employee.getTitle());
				ps.setString(5, employee.getPhoneNumber());
				ps.setString(6, employee.getAddress1());
				ps.setString(7, employee.getAddress2());
				ps.setInt(8, employee.getManager());
				ps.setString(9, employee.getStartDate());
				ps.setString(10, employee.getCcn());
				ps.setInt(11, employee.getCcnLimit());
				ps.setString(12, employee.getPersonalDescription());
				ps.setInt(13, subjectId);
				ps.executeUpdate(query);
			} catch (SQLException sqle)
			{
				s.setMessage("Error updating employee profile");
				sqle.printStackTrace();
			}

		} catch (Exception e)
		{
			s.setMessage("Error updating employee profile");
			e.printStackTrace();
		}
	}

	public void createEmployeeProfile(WebSession s, int userId, Employee employee) throws UnauthorizedException
	{
		try
		{
			// FIXME: Cannot choose the id because we cannot guarantee uniqueness
			int nextId = getNextUID(s);
			String query = "INSERT INTO employee VALUES ( " + nextId + ", ?,?,?,?,?,?,?,?,?,?,?,?,?,?)";

			// System.out.println("Query: " + query);

			try
			{
				PreparedStatement ps = WebSession.getConnection(s).prepareStatement(query);

				ps.setString(1, employee.getFirstName().toLowerCase());
				ps.setString(2, employee.getLastName());
				ps.setString(3, employee.getSsn());
				ps.setString(4, employee.getTitle());
				ps.setString(5, employee.getPhoneNumber());
				ps.setString(6, employee.getAddress1());
				ps.setString(7, employee.getAddress2());
				ps.setInt(8, employee.getManager());
				ps.setString(9, employee.getStartDate());
				ps.setString(10, employee.getCcn());
				ps.setInt(11, employee.getCcnLimit());
				ps.setString(12, employee.getDisciplinaryActionDate());
				ps.setString(13, employee.getDisciplinaryActionNotes());
				ps.setString(14, employee.getPersonalDescription());

				ps.execute();
			} catch (SQLException sqle)
			{
				s.setMessage("Error updating employee profile");
				sqle.printStackTrace();
			}
		} catch (Exception e)
		{
			s.setMessage("Error updating employee profile");
			e.printStackTrace();
		}
	}

	public void createEmployeeProfile_BACKUP(WebSession s, int userId, Employee employee) throws UnauthorizedException
	{
		try
		{
			// FIXME: Cannot choose the id because we cannot guarantee uniqueness
			int nextId = getNextUID(s);
			String query = "INSERT INTO employee VALUES ( " + nextId + ", ?,?,?,?,?,?,?,?,?,?,?,?,?,?)";

			// System.out.println("Query: " + query);

			try
			{
				PreparedStatement ps = WebSession.getConnection(s).prepareStatement(query);

				ps.setString(1, employee.getFirstName().toLowerCase());
				ps.setString(2, employee.getLastName());
				ps.setString(3, employee.getSsn());
				ps.setString(4, employee.getTitle());
				ps.setString(5, employee.getPhoneNumber());
				ps.setString(6, employee.getAddress1());
				ps.setString(7, employee.getAddress2());
				ps.setInt(8, employee.getManager());
				ps.setString(9, employee.getStartDate());
				ps.setString(10, employee.getCcn());
				ps.setInt(11, employee.getCcnLimit());
				ps.setString(12, employee.getDisciplinaryActionDate());
				ps.setString(13, employee.getDisciplinaryActionNotes());
				ps.setString(14, employee.getPersonalDescription());

				ps.execute();
			} catch (SQLException sqle)
			{
				s.setMessage("Error updating employee profile");
				sqle.printStackTrace();
			}
		} catch (Exception e)
		{
			s.setMessage("Error updating employee profile");
			e.printStackTrace();
		}
	}

	/**
	 * Validates that the given parameter value matches the given regular expression pattern.
	 * 
	 * @param parameter
	 * @param pattern
	 * @return
	 * @throws ValidationException
	 */
	protected String validate(final String parameter, final Pattern pattern) throws ValidationException
	{
		Matcher matcher = pattern.matcher(parameter);
		if (!matcher.matches()) throw new ValidationException();

		return parameter;
	}

	private int getNextUID(WebSession s)
	{
		int uid = -1;
		try
		{
			Statement statement = WebSession.getConnection(s).createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE,
																				ResultSet.CONCUR_READ_ONLY);
			ResultSet results = statement.executeQuery("select max(userid) as uid from employee");
			results.first();
			uid = results.getInt("uid");
		} catch (SQLException sqle)
		{
			sqle.printStackTrace();
			s.setMessage("Error updating employee profile");
		}
		return uid + 1;
	}
}