package int_2.servlets.assignments3;

import javax.servlet.*;
import javax.servlet.http.*;
import java.util.*;
import java.io.*;

import int_2.servlets.*;
import int_2.tools.*;

/**
Please respect the copyright of this code. It is not allowed to copy this code and use at any circumstances.
@author		<a href="mailto:fredand44@hotmail.com">&copy; Fredrik Andersson</a><br>

This servlet uses code from my home made toolbox that you can find in the folder 8/tools and 8/beans.The toolbox is not ready yet, I have been working for it for a couple of years when I have time.
The goal is to get a toolbox of classes so it will be easier to map tasks to
use-case-diagram.

This servlet prints out all the environment variables from assignment 1b with HTML instead of txt.
*/
public class EnvironmentVariables_3b extends GeneralServlet
{
	HashMap singelVariables;
	HashMap multiVariables;

	public void start(HttpServletRequest request, HttpServletResponse response) throws IOException
	{
		singelVariables =  new HashMap();
		multiVariables =  new HashMap();

		collectEnviromentVariables(request);
		String output = createPage("applications/int_2/int_2/templates/code_separation_3b.html", "code_separation_3b");
		//String output = output = FileManager.getStringFor("applications/int_2/int_2/templates/code_separation_3b.html");
		output = replaceInOutput(output,  request);

		printString(output);
		flush();
		singelVariables.clear();
		multiVariables.clear();
	}

	public void collectEnviromentVariables(HttpServletRequest request)
	{
		ServletContext sc = getServletContext();
		multiVariables.put("SERVLET INFORMATION:", "SINGEL,Servlet name: ");
		multiVariables.put("SERVLET INIT PARAMETERS:", getInitParameterNames());
		multiVariables.put("CONTEXT INIT PARAMETERS:", sc.getInitParameterNames());
		multiVariables.put("SERVER INFORMATION:", "SINGEL,Server name: ,Server port: ,Server info: ");
		multiVariables.put("SERVER ATTRIBUTES:", sc.getAttributeNames());
		multiVariables.put("RUNTIME VERSIONS:", "SINGEL,Major webserver version: ,Minor webserver version: ,JDK version: ");
		multiVariables.put("CLIENT INFORMATION:", "SINGEL,Remote address: ,Remote host: ,Remote user: ,Authentication type: ");
		multiVariables.put("HEADERS:", request.getHeaderNames());
		multiVariables.put("REQUEST PARAMETERS:", "SINGEL,Query string: ,Character encoding: ,Content length:,Content type: ");
		multiVariables.put("REQUEST PARAMETERS, ONE BY ONE:", request.getParameterNames());
		multiVariables.put("COOKIES, ONE BY ONE:", request.getCookies());
		multiVariables.put("PATH AND CONNECTION INFORMATION:", "SINGEL,Path info: ,Translated path: , Request URI: ,Request URL: ,Request scheme: ,Context path: ,Servlet path: ,Request protocol: ,Request method: ");
		multiVariables.put("REQUEST ATTRIBUTES:", request.getAttributeNames());
		multiVariables.put("SESSION INFORMATION:","SINGEL,Requested session ID: ,Session creation time: ,Session ID: ,Session last accessed: ,Session max inactive interval: ");
		multiVariables.put("SESSION VALUES:", session.getAttributeNames());

		singelVariables.put("Servlet name: ", getServletName());
		singelVariables.put("Server name: ", request.getServerName());
		singelVariables.put("Server port: ", ""+request.getServerPort());
		singelVariables.put("Server info: ", sc.getServerInfo());
		singelVariables.put("Major webserver version: ", ""+sc.getMajorVersion());
		singelVariables.put("Minor webserver version: ", ""+sc.getMinorVersion());
		singelVariables.put("JDK version: ", System.getProperty("java.version"));
		singelVariables.put("Remote address: ", request.getRemoteAddr());
		singelVariables.put("Remote host:  ", request.getRemoteHost());
		singelVariables.put("Remote user: ", request.getRemoteUser());
		singelVariables.put("Authentication type: ", request.getAuthType());
		singelVariables.put("Query string: ", request.getQueryString());
		singelVariables.put("Character encoding: ", request.getCharacterEncoding());
		singelVariables.put("Content type: ", request.getContentType());
		singelVariables.put("Path info: ", request.getPathInfo());
		singelVariables.put("Translated path: ", request.getPathTranslated());
		singelVariables.put("Request URI: ", request.getRequestURI());
		singelVariables.put("Request URL: ", request.getRequestURL().toString());
		singelVariables.put("Request scheme: ", request.getScheme());
		singelVariables.put("Context path: ", request.getContextPath());
		singelVariables.put("Servlet path: ", request.getServletPath());
		singelVariables.put("Request protocol: ", request.getProtocol());
		singelVariables.put("Request method: ", request.getMethod());
		singelVariables.put("Requested session ID: ", request.getRequestedSessionId());
		HttpSession session = request.getSession(true);
		singelVariables.put("Session creation time: ", ""+session.getCreationTime());
		singelVariables.put("Session ID: ", session.getId());
		singelVariables.put("Session last accessed: ", ""+session.getLastAccessedTime());
		singelVariables.put("Session max inactive interval: ", ""+session.getMaxInactiveInterval());
	}

	public String replaceInOutput(String output, HttpServletRequest request)
	{

		Iterator multiKeyIterator = multiVariables.keySet().iterator();

		while(multiKeyIterator.hasNext())
		{
			String key = (String)multiKeyIterator.next();

			Object object = multiVariables.get(key);

			if(object instanceof String)
			{
				StringBuffer stringBuffer = new StringBuffer("");
				String value = (String)object;
				if(value.startsWith("SINGEL"))
				{
					StringTokenizer stringTokenizer = new StringTokenizer(value, ",");
					int count = 0;
					while(stringTokenizer.hasMoreTokens())
					{
						if(count > 0)
						{
							String token = stringTokenizer.nextToken();
							value = (String)singelVariables.get(token);
							stringBuffer.append("<li>");
							stringBuffer.append(token);
							stringBuffer.append(value);
							stringBuffer.append("</li>");
						}
						else
						{
							stringTokenizer.nextToken();
						}
						count++;
					}
				}
				else
				{
					value = (String)multiVariables.get(key);
					stringBuffer.append("<li>");
					stringBuffer.append(key);
					stringBuffer.append(value);
					stringBuffer.append("</li>");
				}
				output = TextManager.replaceInString(output, "<li>"+key+"</li>", stringBuffer.toString());
			}
			else if(object instanceof Cookie[])
			{
				Cookie[] cookies = (Cookie[])object;
				StringBuffer stringBuffer = new StringBuffer("");
				if(cookies != null)
				{
					for (int i = 0; i < cookies.length; i++)
					{
						Cookie cookie = cookies[i];
						stringBuffer.append("<li>");
						stringBuffer.append(cookie.getName());
						stringBuffer.append(": ");
						stringBuffer.append(cookie.getValue());
						stringBuffer.append("</li>");
					}
				}
				output = TextManager.replaceInString(output, "<li>"+key+"</li>", stringBuffer.toString());
			}
			else if(object instanceof Enumeration)
			{
				ServletContext sc = getServletContext();
				HttpSession session = request.getSession(true);

				Enumeration e = (Enumeration)object;
				StringBuffer stringBuffer = new StringBuffer("");
				if(key.equals("SERVLET INIT PARAMETERS:"))
				{
					while (e.hasMoreElements())
					{
						String key2 = (String)e.nextElement();
						String value = getInitParameter(key2);
						stringBuffer.append("<li>");
						stringBuffer.append(key2);
						stringBuffer.append(": ");
						stringBuffer.append(value);
						stringBuffer.append("</li>");
					}
				}
				else if(key.equals("CONTEXT INIT PARAMETERS:"))
				{
					while (e.hasMoreElements())
					{
						String key2 = (String)e.nextElement();
						String value = sc.getInitParameter(key2);
						stringBuffer.append("<li>");
						stringBuffer.append(key2);
						stringBuffer.append(": ");
						stringBuffer.append(value);
						stringBuffer.append("</li>");
					}
				}
				else if(key.equals("SERVER ATTRIBUTES:"))
				{
					while (e.hasMoreElements())
					{
						String key2 = (String)e.nextElement();
						Object value = sc.getAttribute(key2);
						stringBuffer.append("<li>");
						stringBuffer.append(key2);
						stringBuffer.append(": ");
						stringBuffer.append(value.toString());
						stringBuffer.append("</li>");
					}
				}
				else if(key.equals("HEADERS:"))
				{
					while (e.hasMoreElements())
					{
						String key2 = (String)e.nextElement();
						String value = request.getHeader(key2);
						stringBuffer.append("<li>");
						stringBuffer.append(key2);
						stringBuffer.append(": ");
						stringBuffer.append(value);
						stringBuffer.append("</li>");
					}
				}
				else if(key.equals("REQUEST PARAMETERS, ONE BY ONE:"))
				{
					while (e.hasMoreElements())
					{
						String key2 = (String)e.nextElement();
						String[] values = request.getParameterValues(key2);
						for(int i = 0; i < values.length; i++)
						{
							stringBuffer.append("<li>");
							stringBuffer.append(key2);
							stringBuffer.append(": ");
							stringBuffer.append(values[i]);
							stringBuffer.append("</li>");
						}
					}
				}
				else if(key.equals("REQUEST ATTRIBUTES:"))
				{
					while (e.hasMoreElements())
					{
						String key2 = (String)e.nextElement();
						Object value = request.getAttribute(key2);
						stringBuffer.append("<li>");
						stringBuffer.append(key2);
						stringBuffer.append(": ");
						stringBuffer.append(value.toString());
						stringBuffer.append("</li>");
					}
				}
				else if(key.equals("SESSION VALUES:"))
				{
					while (e.hasMoreElements())
					{
						String key2 = (String)e.nextElement();
						Object value = session.getAttribute(key2);
						stringBuffer.append("<li>");
						stringBuffer.append(key2);
						stringBuffer.append(": ");
						stringBuffer.append(value.toString());
						stringBuffer.append("</li>");
					}
				}
				output = TextManager.replaceInString(output, "<li>"+key+"</li>", stringBuffer.toString());
			}
		}

		return output;
	}
}