/**
    * 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.clock.location.validation;
  
  import java.util.List;
  
  import org.apache.commons.lang.StringUtils;
  import org.apache.log4j.Logger;
  import org.kuali.hr.time.authorization.AuthorizationValidationUtils;
  import org.kuali.hr.time.authorization.DepartmentalRule;
  import org.kuali.hr.time.authorization.DepartmentalRuleAuthorizer;
  import org.kuali.hr.time.clock.location.ClockLocationRule;
  import org.kuali.hr.time.clock.location.ClockLocationRuleIpAddress;
  import org.kuali.hr.time.service.base.TkServiceLocator;
  import org.kuali.hr.time.util.TkConstants;
  import org.kuali.hr.time.util.ValidationUtils;
  import org.kuali.rice.kns.document.MaintenanceDocument;
  import org.kuali.rice.kns.maintenance.rules.MaintenanceDocumentRuleBase;
  import org.kuali.rice.krad.bo.PersistableBusinessObject;
  
  public class ClockLocationRuleRule extends MaintenanceDocumentRuleBase {
  
  	private static Logger LOG = Logger.getLogger(ClockLocationRuleRule.class);
  
  	public static boolean validateIpAddress(String ip) {
  		LOG.debug("Validating IP address: " + ip);
  		if(ip == null) {
  			return false;
  		}
  		if(ip.isEmpty() || ip.length() > 15 || ip.endsWith(TkConstants.IP_SEPERATOR) || ip.startsWith(TkConstants.IP_SEPERATOR)) {
  			return false;
  		}
  		String[] lst =  StringUtils.split(ip, TkConstants.IP_SEPERATOR);
  		if(lst.length > 4 || (lst.length <4 && ip.indexOf(TkConstants.WILDCARD_CHARACTER)< 0)) {
  			return false;
  		}
  		for(String str : lst) {
  			if(!str.matches(TkConstants.IP_WILDCARD_PATTERN)) {
  				return false;
  			}
  		}
  		return true;
  	}
  	
  	boolean validateIpAddresses(List<ClockLocationRuleIpAddress> ipAddresses) {
  		for(ClockLocationRuleIpAddress ip : ipAddresses) {
  			if(!validateIpAddress(ip.getIpAddress())) {
  				return this.flagIPAddressError(ip.getIpAddress());
  			}
  		}
  		return true;
  	}
  	
  	boolean flagIPAddressError(String ip) {
  		this.putFieldError("ipAddresses", "ipaddress.invalid.format", ip);
  		return false;
  	}
  
  	boolean validateWorkArea(ClockLocationRule clr) {
  		boolean valid = true;
  		if (clr.getWorkArea() != null
  				&& !ValidationUtils.validateWorkArea(clr.getWorkArea(), clr
  						.getEffectiveDate())) {
  			this.putFieldError("workArea", "error.existence", "workArea '"
  					+ clr.getWorkArea() + "'");
  			valid = false;
  		} else if (clr.getWorkArea() != null
  				&& !clr.getWorkArea().equals(TkConstants.WILDCARD_LONG)) {
  			int count = TkServiceLocator.getWorkAreaService().getWorkAreaCount(clr.getDept(), clr.getWorkArea());
  			valid = (count > 0);
  			if (!valid) {
  				this.putFieldError("workArea", "dept.workarea.invalid.sync",
  						clr.getWorkArea() + "");
  			}
  		}
  		return valid;
  	}
  
  	protected boolean validateDepartment(ClockLocationRule clr) {
          boolean ret = false;
  
          if (!StringUtils.isEmpty(clr.getDept())) {
      		if (!ValidationUtils.validateDepartment(clr.getDept(), clr.getEffectiveDate())) {
  			    this.putFieldError("dept", "error.existence", "department '" + clr.getDept() + "'");
              } else if (!DepartmentalRuleAuthorizer.hasAccessToWrite(clr)) {
                  this.putFieldError("dept", "error.department.permissions", clr.getDept());
             } else {
                 ret = true;
             }
         }
 
         return ret;
 	}
 
 	protected boolean validateJobNumber(ClockLocationRule clr) {
 		boolean valid = true;
 		if (clr.getJobNumber() == null) {
 			valid = false;
 		} else if (!clr.getJobNumber().equals(TkConstants.WILDCARD_LONG)) {
 			int count = TkServiceLocator.getJobService().getJobCount(clr.getPrincipalId(), clr.getJobNumber(),null);
 			valid = (count > 0);
 			if (!valid) {
 				this.putFieldError("jobNumber", "principalid.job.invalid.sync",
 						clr.getJobNumber() + "");
 			}
 		}
 		return valid;
 	}
 
 	protected boolean validatePrincipalId(ClockLocationRule clr) {
 		boolean valid = false;
 		if (clr.getPrincipalId() == null) {
 			valid = false;
 		} else {
 			valid = true;
 		}
 		return valid;
 	}
 
     /**
      * This method will validate whether the wildcard combination and wild
      * carded areas for this DepartmentalRule are valid or not. Errors are added
      * to the field errors to report back to the user interface as well.
      *
      * @param clr The Departmental rule we are investigating.
      *
      * @return true if wild card setup is correct, false otherwise.
      */
     boolean validateWildcards(DepartmentalRule clr) {
         boolean valid = true;
 
         if (!ValidationUtils.validateWorkAreaDeptWildcarding(clr)) {
             // add error when work area defined, department is wild carded.
             this.putFieldError("dept", "error.wc.wadef", "department '" + clr.getDept() + "'");
             valid = false;
         }
 
         if (StringUtils.equals(clr.getDept(), TkConstants.WILDCARD_CHARACTER) &&
                 !AuthorizationValidationUtils.canWildcardDepartment(clr)) {
             this.putFieldError("dept", "error.wc.dept.perm", "department '" + clr.getDept() + "'");
             valid = false;
         }
 
         if (clr!= null && clr.getWorkArea() != null && clr.getWorkArea().equals(TkConstants.WILDCARD_LONG) &&
                 !AuthorizationValidationUtils.canWildcardWorkArea(clr)) {
             this.putFieldError("dept", "error.wc.wa.perm", "department '" + clr.getDept() + "'");
             valid = false;
         }
 
         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;
 
 		PersistableBusinessObject pbo = (PersistableBusinessObject) this.getNewBo();
 		if (pbo instanceof ClockLocationRule) {
 			ClockLocationRule clr = (ClockLocationRule) pbo;
             valid = this.validateDepartment(clr);
             valid &= this.validateWorkArea(clr);
             valid &= this.validateWildcards(clr);
             valid &= this.validatePrincipalId(clr);
             valid &= this.validateJobNumber(clr);
             valid &= this.validateIpAddresses(clr.getIpAddresses());
 		}
 
 		return valid;
 	}
 }