/**
    * Copyright 2004-2013 The Kuali Foundation
    *
    * Licensed under the Educational Community License, Version 2.0 (the "License");
    * you may not use this file except in compliance with the License.
    * You may obtain a copy of the License at
    *
    * http://www.opensource.org/licenses/ecl2.php
    *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.kuali.hr.time.clocklog.validation;
  
  import java.util.regex.Matcher;
  import java.util.regex.Pattern;
  
  import org.apache.log4j.Logger;
  import org.kuali.hr.time.clock.location.validation.ClockLocationRuleRule;
  import org.kuali.hr.time.clocklog.ClockLog;
  import org.kuali.hr.time.service.base.TkServiceLocator;
  import org.kuali.rice.kns.document.MaintenanceDocument;
  import org.kuali.rice.kns.maintenance.rules.MaintenanceDocumentRuleBase;
  import org.kuali.rice.krad.bo.PersistableBusinessObject;
  import org.kuali.rice.krad.util.GlobalVariables;
  
  public class ClockLogRule  extends MaintenanceDocumentRuleBase {
  
  	private static final String WILDCARD_CHARACTER = "%";
  	private static final String REGEX_IP_ADDRESS_STRING = "(?:(?:"
  			+ WILDCARD_CHARACTER
  			+ "|25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.){3}(?:"
  			+ WILDCARD_CHARACTER + "|25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)";
  	private static final Pattern REGEX_IP_ADDRESS_PATTERN = Pattern
  			.compile(REGEX_IP_ADDRESS_STRING);
  
  	private static Logger LOG = Logger.getLogger(ClockLocationRuleRule.class);
  
  	protected boolean validateIpAddress(String ip) {
  		boolean valid = false;
  
  		LOG.debug("Validating IP address: " + ip);
  		Matcher matcher = REGEX_IP_ADDRESS_PATTERN.matcher(ip);
  		valid = matcher.matches();
  		if (!valid) {
  			this.putFieldError("ipAddress", "ipaddress.invalid.format", ip);
  		}
  
  		return valid;
  	}
  
  	//TODO fix this class
  	protected boolean validateWorkArea(ClockLog clockLog ) {
  		boolean valid = false;
  		LOG.debug("Validating workarea: " + clockLog.getWorkArea());
  		int count = TkServiceLocator.getWorkAreaService().getWorkAreaCount(null, clockLog.getWorkArea());
  		if (count >0 ) {
  			valid = true;
  			LOG.debug("found workarea.");
  		} else {
  			this.putFieldError("workArea", "error.existence", "Workarea '"
  					+ clockLog.getWorkArea()+ "'");
  		}
  		return valid;
  	}
  
  	protected boolean validateTask(ClockLog clockLog ) {
  		boolean valid = false;
  		LOG.debug("Validating task: " + clockLog.getTask());
  		int count = TkServiceLocator.getTaskService().getTaskCount(clockLog.getTask());
  		if (count >0 ) {
  			valid = true;
  			LOG.debug("found task.");
  		} else {
  			this.putFieldError("task", "error.existence", "Task '"
  					+ clockLog.getTask()+ "'");
  		}
  		return valid;
  	}
  
  
  	/**
  	 * It looks like the method that calls this class doesn't actually care
  	 * about the return type.
  	 */
  	@Override
  	protected boolean processCustomRouteDocumentBusinessRules(
  			MaintenanceDocument document) {
  		boolean valid = false;
  
  		LOG.debug("entering custom validation for ClockLog");
  		PersistableBusinessObject pbo = (PersistableBusinessObject) this.getNewBo();
  		if (pbo instanceof ClockLog) {
  			ClockLog clockLog = (ClockLog) pbo;
  			clockLog.setUserPrincipalId(GlobalVariables.getUserSession().getPrincipalId());
  			if (clockLog != null) {
 				valid = true;
 				valid &= this.validateIpAddress(clockLog.getIpAddress());
 				valid &= this.validateWorkArea(clockLog);
 				valid &= this.validateTask(clockLog);
 			}
 		}
 
 		return valid;
 	}
 
 }