package com.nextier.model;

import java.sql.Timestamp;
import java.util.*;

import javax.servlet.http.*;
import org.apache.log4j.Logger;



/**
 * A collection of utility methods for use in OA Skins. Because these
 * methods make skin development much easier, skin authors should study them
 * carefully.<p>
 *
 * Three major areas of funtionality are provided:<p><ol>
 *  <li> Methods that simplify Authorization tasks:
 *    <ul>
 *      <li>{@link #login(HttpServletRequest, HttpServletResponse, String, String, boolean)}
 *      <li>{@link #getUserAuthorization(HttpServletRequest, HttpServletResponse)}
 *      <li>{@link #removeUserAuthorization(HttpServletRequest, HttpServletResponse)}
 *    </ul>
 *    <p>
 *  <li> Methods that get and set Session and cookie values.
 *    <ul>
 *      <li>{@link #getCookie(HttpServletRequest, String)}
 *      <li>{@link #remove(HttpServletRequest, HttpServletResponse, String)}
 *      <li>{@link #retrieve(HttpServletRequest, HttpServletResponse, String)}
 *      <li>{@link #store(HttpServletRequest, HttpServletResponse, String, String)}
 *      <li>{@link #store(HttpServletRequest, HttpServletResponse, String, String, int)}
 *      <li>{@link #store(HttpServletRequest, HttpServletResponse, String, String, int boolean)}
 *    </ul>
 *    <p>
 *  <li> Date methods.
 *    <ul>
 *      <li>{@link #dateToText(HttpServletRequest, HttpServletResponse, User, Date)}
 *      <li>{@link #formatDate(HttpServletRequest, HttpServletResponse, User, Date)}
 *      <li>{@link #getLastVisited(HttpServletRequest, HttpServletResponse)}
 *    </ul>
 * </ol>
 */
public class SkinUtils {
    /** Name of the cookie used to store user info for auto-login purposes */
    private static final String OA_AUTOLOGIN_COOKIE = "oa.authorization.autologin";

    // Default cookie time to live (in seconds).
   // private static final int MAX_COOKIE_AGE = (int)(OAGlobals.WEEK / 1000) * 8;

    // Days of the week
    private static final String[] DAYS_OF_WEEK =
            {"Sun","Mon","Tues","Wed","Thurs","Fri","Sat"};
    // Months of the year
    private static final String[] MONTHS_OF_YEAR =
            {"Jan","Feb","Mar","Apr","May","Jun","Jul","Aug",
             "Sep","Oct","Nov","Dec"};

    // "Tweakable" parameters for the cookie password encoding. NOTE: changing
    // these and recompiling this class will essentially invalidate old cookies.
    private final static int  ENCODE_XORMASK = 0x5A;
    private final static char ENCODE_DELIMETER = '\002';
    private final static char ENCODE_CHAR_OFFSET1 = 'A';
    private final static char ENCODE_CHAR_OFFSET2 = 'h';
	
	//logger		
	private final static Logger log = Logger.getLogger("fy");
	
    // A reuseable global calendar object
    private static Calendar globalCal = Calendar.getInstance();
	public static Logger getLogger(){
		 return log;
	}
	

    /**
     * Returns an Authorization token for the user. The session is first checked
     * and if the token is not found, the OA cookie is checked. If the cookie
     * is found,
     *
     * @param request the HttpServletRequest object, known as "request" in a
     *      JSP page.
     * @param response The HttpServletResponse object, known as "response" in
     *      a JSP page.
     * @return A users's authorization token if they're already authenticated,
     *      otherwise <code>null</code>.
     */
    //public static Authorization getUserAuthorization(HttpServletRequest request, 
    												  //HttpServletResponse response){
        //HttpSession session = request.getSession();

        // Check 1: check for the OA authentication token in the user's session.
       // Authorization authToken = (Authorization)session.getAttribute(OAGlobals.OA_AUTH_TOKEN);
        //if (authToken != null) {
        //    return authToken;
       // }

        // Check 2: check the oa cookie for loginname and password
        //Cookie cookie = getCookie(request, OA_AUTOLOGIN_COOKIE);
        //if (cookie != null) {
            //try {
                // at this point, we found a cookie so grab the loginname and
                // password from it, create an authorization token and store
                // that in the session
               // String[] values = decodePasswordCookie(cookie.getValue());
               // String loginname = values[0];
               // String password = values[1];
                // Try to validate the user based on the info from the cookie.
                // Catch any exceptions
               // authToken = AuthorizationFactory.getAuthorization(loginname,password);
           // }
           // catch (Exception e) {}

            // put that token in the user's session:
            //if (authToken != null) {
             //   session.setAttribute(OAGlobals.OA_AUTH_TOKEN, authToken);
            //}

            // return the authorization token
           // return authToken;
        //}
        //return null;
    //}

    //public static SecurityFactory getSecurityFactory(HttpServletRequest request, 
    											//	  HttpServletResponse response){
        //HttpSession session = request.getSession(true);

       // SecurityFactory securityFactory = (SecurityFactory)session.getAttribute(OAGlobals.OA_SECURITY_FACTORY);
       /// if (securityFactory != null) 
          //  return securityFactory;
        
        //return null;
        
    //}
    
    /**
     * Validates the user and optionally enables auto-login by creating an
     * auto-login cookie.
     *
     * @param request the HttpServletRequest object, known as "request" in a JSP page.
     * @param response the HttpServletResponse object, known as "response" in a JSP page.
     * @param loginname the loginname.
     * @param password the password.
     * @param autoLogin if <code>true</code> create a cookie that enables auto-login.
     * @throws UserNotFoundException
     * @throws UnauthorizedException
     */
    //public static Authorization login(HttpServletRequest request,
           // HttpServletResponse response, String loginname, String password,
          //  boolean autoLogin) throws UserNotFoundException, UnauthorizedException
    //{
        //HttpSession session = request.getSession();
        //Authorization authToken = AuthorizationFactory.getAuthorization(loginname, password);
       // session.setAttribute(OAGlobals.OA_AUTH_TOKEN, authToken);

        // If auto-login is enabled, create the auto-login cookie
        //f (autoLogin) {
           // saveCookie(response,OA_AUTOLOGIN_COOKIE,
                 //   encodePasswordCookie(loginname,password));
       // }
       // return authToken;
   // }
    //public static Authorization setUserAuthorization(HttpServletRequest request,
           // HttpServletResponse response, String loginname, String password,
          //  boolean autoLogin) throws UserNotFoundException, UnauthorizedException
    //{
      //  return login(request, response, loginname, password, autoLogin);
  //  }


    /**
     *  Removes a user's token from the session and invalidates the auto-login
     *  cookie (if one exists).
     *
     *  @param request the HttpServletRequest object; "request" in JSP pages.
     *  @param response the HttpServletResponse object; "response" in JSP pages.
     */
  //  public static void logout(HttpServletRequest request,
  //          HttpServletResponse response)
  //  {
  //      HttpSession session = request.getSession();
  //      session.removeAttribute(OAGlobals.OA_AUTH_TOKEN);
  //      deleteCookie(request, response, OA_AUTOLOGIN_COOKIE);
  //  }
    
  //  public static void removeUserAuthorization(HttpServletRequest request,
  //          HttpServletResponse response)
  //  {
  //      logout(request,response);
  //  }


    /**
     * Invalidates the specified cookie.
     */
    public static void deleteCookie(HttpServletRequest request,
            HttpServletResponse response, String cookieName)
    {
        // invalidate the cookie
        Cookie cookie = new Cookie(cookieName, "");
        // delete the cookie when the user closes their webbrowser
        cookie.setMaxAge(0);
        cookie.setPath("/");
        response.addCookie(cookie);
    }

    /**
     *  Persists a value for the length of the user's session.
     *
     *  @see SkinUtils#store(HttpServletRequest,HttpServletResponse,String,String,int) store
     */
    public static void store(HttpServletRequest request, HttpServletResponse response,
            String id, String value)
    {
        // By default, we'll just store the value in the session (saveTime
        // is zero)
        store(request, response, id, value, 0);
    }

    /**
     *  This method should be used in a skin to store an arbritary value.
     *  For example, we could persist the name of a user so that on a form page
     *  where they enter their name, that field could be auto-filled in with
     *  the stored value.
     *  <p>
     *  To indicate that the data should only be persisted for a session, pass
     *  in 0 as the <code>timeToLive</code>. Otherwise, the value will be
     *  saved for one month.
     *
     *  @param request The HttpServletRequest object, known as "request" on a
     *      JSP page.
     *  @param response The HttpServletRequest object, known as "response" on a
     *      JSP page.
     *  @param id The name or identifier of the data you want to persist.
     *  @param value The value you wish to store.
     *  @param saveTime The length (in seconds) this value will persist. Any
     *      value of 0 or less indicates this data should only persist for
     *      a session.
     */
    public static void store(HttpServletRequest request,
            HttpServletResponse response, String id, String value, int saveTime)
    {
        // If the id is null, return
        if (id == null) {
            return;
        }

        // Get the session object
        HttpSession session = request.getSession();

        // Store the value in the session
        session.setAttribute(id, value);

        // if the timeToLive param is > 0, store to a cookie
        if (saveTime > 0) {
            saveCookie(response, id, value, saveTime);
        }
    }

    /**
     *  Retrieves a user stored value. Values are set using the