package at.gv.egovernment.moa.id.configuration.validation;

import java.net.MalformedURLException;
import java.net.URL;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.log4j.Logger;

public class ValidationHelper {

	private static final Logger log = Logger.getLogger(ValidationHelper.class);
	
	public static boolean validateOAID(String oaIDObj) {
		if (oaIDObj != null) {
			try {
				
				long oaID = Long.valueOf(oaIDObj);
			
				if (oaID > 0 && oaID < Long.MAX_VALUE)
					return true;
				
			} catch (Throwable t) {
				log.warn("No valid DataBase OAID received! " + oaIDObj);
			}
		}
		return false;
	}
	
	public static boolean validateNumber(String value) {
		
		log.debug("Validate Number " + value);

		try {
			float num = Float.valueOf(value);
			
			return true;
			
		} catch (NumberFormatException e) {
			return false;
		}
		
		
	}
	
	
	public static boolean validateURL(String urlString) {
		
		log.debug("Validate URL " + urlString);
		
		if (urlString.startsWith("http") || urlString.startsWith("https")) {
  		  try {
			URL url =new URL(urlString);
			return true;
			
  		  } catch (MalformedURLException e) {
  		  }
		}
		
		return false;
	}
	
	public static boolean isValidTarget(String target) {
		   
	   log.debug("Ueberpruefe Parameter Target");
	            
       Pattern pattern = Pattern.compile("[a-zA-Z-]{1,5}");
       Matcher matcher = pattern.matcher(target);
       boolean b = matcher.matches();
       if (b) {
    	   log.debug("Parameter Target erfolgreich ueberprueft");
    	  return true;
       }
       else {
    	   log.error("Fehler Ueberpruefung Parameter Target. Target entspricht nicht den Kriterien (nur Zeichen a-z, A-Z und -, sowie 1-5 Zeichen lang)");
    	  return false;  
       }
	            
	}
	
	public static boolean isValidSourceID(String sourceID) {
		   
	   log.debug("Ueberpruefe Parameter sourceID");

	   Pattern pattern = Pattern.compile("[\\w-_]{1,20}");
	   Matcher matcher = pattern.matcher(sourceID);
	   boolean b = matcher.matches();
	   if (b) {
	 	  log.debug("Parameter sourceID erfolgreich ueberprueft");
	 	  return true;
      }
      else {
    	  log.error("Fehler Ueberpruefung Parameter sourceID. SourceID entspricht nicht den Kriterien (nur Zeichen a-z, A-Z, - und _, sowie 1-20 Zeichen lang)");
    	  return false;  
      }            
	}
	
	public static boolean isDateFormat(String dateString) {
		SimpleDateFormat sdf = new SimpleDateFormat("dd.MM.yyyy");
		try {
			sdf.parse(dateString);
			return true;
			
		} catch (ParseException e) {
			return false;
		}
	}

	public static boolean isEmailAddressFormat(String address) {
		if (address == null) {
			return false;
		}
		return Pattern.compile("^[a-zA-Z0-9._%+-]+@[a-zA-Z0-9.-]+\\.[a-zA-Z]{2,6}$").matcher(address).matches();
	}
	
	public static boolean isValidOAIdentifier(String param) {
		if (param == null) {
			return false;
		}
		return param.indexOf(";") != -1 ||
					 param.indexOf("%") != -1 ||
					 param.indexOf("\"") != -1 ||
					 param.indexOf("'") != -1 ||
					 param.indexOf("?") != -1 ||
					 param.indexOf("`") != -1 ||
					 param.indexOf(",") != -1 ||
					 param.indexOf("<") != -1 ||
					 param.indexOf(">") != -1 ||
					 param.indexOf("\\") != -1;	
		
	}
	
	public static String getNotValidOAIdentifierCharacters() {
		
		return "; % \" ' ` , < > \\";
	}	
	
	public static boolean containsPotentialCSSCharacter(String param, boolean commaallowed) {
		
		if (param == null) {
			return false;
		}
		return param.indexOf(";") != -1 ||
					 param.indexOf("%") != -1 ||
					 param.indexOf("\"") != -1 ||
					 param.indexOf("'") != -1 ||
					 param.indexOf("?") != -1 ||
					 param.indexOf("`") != -1 ||
					 ( param.indexOf(",") != -1 && !commaallowed ) ||
					 param.indexOf("<") != -1 ||
					 param.indexOf(">") != -1 ||
					 param.indexOf("\\") != -1 ||
					 param.indexOf("/") != -1;					 					
	}
	
	public static String getPotentialCSSCharacter(boolean commaallowed) {
		
		if (commaallowed)
			return "; % \" ' ` < > \\ /";
		else
			return "; % \" ' ` , < > \\ /";
	}	
}