/**
 * Copyright (c) Codice Foundation
 * <p>
 * This is free software: you can redistribute it and/or modify it under the terms of the GNU Lesser
 * General Public License as published by the Free Software Foundation, either version 3 of the
 * License, or any later version.
 * <p>
 * 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
 * Lesser General Public License for more details. A copy of the GNU Lesser General Public License
 * is distributed along with this program and can be found at
 * <http://www.gnu.org/licenses/lgpl.html>.
 **/
package org.codice.ddf.ui;

import java.io.IOException;
import java.io.PrintWriter;
import java.security.Principal;
import java.util.Enumeration;
import java.util.Iterator;
import java.util.List;
import java.util.Map;

import javax.servlet.ServletException;
import javax.servlet.http.Cookie;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.jasig.cas.client.authentication.AttributePrincipal;

public class ExampleSSOWidget extends HttpServlet {
    private static final long serialVersionUID = 1L;

    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html");
        createPage(request, response.getWriter());
    }

    @SuppressWarnings("rawtypes")
    protected void createPage(HttpServletRequest request, PrintWriter out)
            throws IOException, ServletException {
        String endl = System.getProperty("line.separator");
        StringBuilder sb = new StringBuilder();

        sb.append("<html>");
        sb.append("<head>");
        sb.append("<title>Example SSO Widget</title>");
        sb.append("</head>");

        sb.append("<body>")
                .append(endl);
        sb.append("<h2 align=\"center\">Example SSO Widget")
                .append(" Protected Page on ")
                .append(request.getServerName())
                .append("</h2>")
                .append(endl);

        sb.append(new java.util.Date())
                .append("<br/><br/>")
                .append(endl);

        sb.append("request.getRemoteUser() = ");

        if (request.getRemoteUser() != null) {
            sb.append(request.getRemoteUser())
                    .append("<br/>")
                    .append(endl);
        } else {
            sb.append("None")
                    .append("<br/>")
                    .append(endl);
        }

        sb.append("request.getUserPrincipal() = ");

        Principal p = request.getUserPrincipal();

        if (p != null) {
            sb.append(p.getName())
                    .append("<br/><br/>")
                    .append(endl);
        } else {
            sb.append("None")
                    .append("<br/><br/>")
                    .append(endl);
        }

        if (request.getContextPath() != null && !"".equals(request.getContextPath())) {
            sb.append("</p><p>")
                    .append(endl);
            sb.append("The context root name of this application is ")
                    .append(request.getContextPath())
                    .append(endl);
            sb.append("</p>")
                    .append(endl);
        }

        sb.append("<h3>Released Attributes:</h3>")
                .append(endl);

        Map attributes = null;

        if (p != null) {
            AttributePrincipal principal = (AttributePrincipal) p;

            attributes = principal.getAttributes();

            if (attributes != null && attributes.size() > 0) {
                Iterator iterator = attributes.entrySet()
                        .iterator();
                while (iterator.hasNext()) {
                    Map.Entry entry = (Map.Entry) iterator.next();
                    Object value = entry.getValue();
                    if (value instanceof String) {
                        sb.append(entry.getKey())
                                .append(": ")
                                .append(value)
                                .append("<br/>")
                                .append(endl);
                    } else if (value instanceof List) {
                        sb.append(entry.getKey())
                                .append(" is a List:<br/>")
                                .append(endl);
                        for (Object o : ((List) value)) {
                            sb.append("   ")
                                    .append(o.toString())
                                    .append("<br/>")
                                    .append(endl);
                        }
                    }
                }
            }

        } else {
            sb.append("None")
                    .append(endl);
        }

        sb.append("<h3>Cookies:</h3>")
                .append(endl);
        Cookie[] cookies = request.getCookies();
        if (cookies != null && cookies.length > 0) {
            sb.append("getCookies() = <br/>")
                    .append(endl);
            for (Cookie o : cookies) {
                sb.append("   ")
                        .append(o.getName())
                        .append(": ")
                        .append(o.getValue())
                        .append("<br/>")
                        .append(endl);
            }
        } else {
            sb.append("getCookies() = null<br/>")
                    .append(endl);
        }

        sb.append("<h3>Headers:</h3>")
                .append(endl);
        Enumeration<String> hdrEnum = request.getHeaderNames();

        if (hdrEnum != null) {
            sb.append("getHeaders() = <br/>")
                    .append(endl);
            while (hdrEnum.hasMoreElements()) {
                String name = (String) hdrEnum.nextElement();
                sb.append("   ")
                        .append(name)
                        .append(": ")
                        .append(request.getHeader(name))
                        .append("<br/>")
                        .append(endl);
            }
        } else {
            sb.append("getHeaderNames() = null<br/>")
                    .append(endl);
        }

        // <input type="hidden" name="LogoutType" value="AppicationLogout">

        //        sb.append( "<br/><br/>" ).append( endl );
        //        sb.append( "<form name=\"Logout\" action=\"LogoutServlet\" method=\"get\">" );
        //        sb.append( "<input type=\"hidden\" name=\"LogoutType\" value=\"ApplicationLogout\"/>" ).append( endl );
        //        sb.append( "<input type=\"submit\" value=\"Logout\"/></form><br/>" ).append( endl );
        //        sb.append( "<form name=\"SSOLogout\" action=\"LogoutServlet\" method=\"get\">" );
        //        sb.append( "<input type=\"hidden\" name=\"LogoutType\" value=\"SingleSignOut\"/>" ).append( endl );
        //        sb.append( "<input type=\"submit\" value=\"Single Sign-Out\"/></form><br/>" ).append( endl );

        sb.append("</body></html>")
                .append(endl);
        out.println(sb.toString());
    }
}