/**
    * Copyright 2004-2012 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.department;
  
  import java.sql.Date;
  import java.util.HashMap;
  import java.util.List;
  import java.util.Map;
  
  import org.apache.commons.lang.StringUtils;
  import org.kuali.hr.time.roles.TkRole;
  import org.kuali.hr.time.service.base.TkServiceLocator;
  import org.kuali.hr.time.util.TKUtils;
  import org.kuali.hr.time.util.TkConstants;
  import org.kuali.kfs.coa.businessobject.Chart;
  import org.kuali.kfs.coa.businessobject.Organization;
  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.service.KRADServiceLocator;
  
  public class DepartmentRule extends MaintenanceDocumentRuleBase {
  	
  	boolean validateDepartment(Department department) {
  		boolean valid = true;
  		Department existingDept = TkServiceLocator.getDepartmentService().getDepartment(department.getDept(), department.getEffectiveDate());
  		
  		if ( department.getHrDeptId() == null ){ //KPME-1456. xichen. Only go through this validation when create a new dept. 
  			if (department.getEffectiveDate() != null) {	    
  				if (existingDept != null){
  					if ( existingDept.getDept().equalsIgnoreCase(department.getDept()) && 
  						 existingDept.getLocation().equalsIgnoreCase(department.getLocation()) ){
  						// error.department.duplicate.exists=There is an exact duplicate version of this Department.					
  						this.putFieldError("dept", "error.department.duplicate.exists", department.getDept());
  						valid = false;
  					}
  				}
  			}
  		} 
  		
  		return valid;
  	}
  
  	boolean validateChart(String value) {
  		boolean valid = true;
  		if (value != null) {
  			Chart chart = KRADServiceLocator.getBusinessObjectService()
  					.findBySinglePrimaryKey(Chart.class, value);
  			valid = (chart != null);
  
  			if (!valid) {
  				this.putFieldError("chart", "dept.chart.notfound", value);
  			}
  		}
  		return valid;
  	}
  
  	boolean validateOrg(String value) {
  		boolean valid = true;
  		if (value != null) {
  			Organization org = this.getOrganization(value);
  			valid = (org != null);
  
  			if (!valid) {
  				this.putFieldError("org", "dept.org.notfound", value);
  			}
  		}
  		return valid;
  	}
  
  	boolean validateChartAndOrg(String chartString, String orgString) {
  		if(chartString != null && orgString != null) {
  			Chart chart = KRADServiceLocator.getBusinessObjectService().findBySinglePrimaryKey(Chart.class, chartString);
  			Organization org = this.getOrganization(orgString);
  			if(chart != null && org != null) {
  				Chart chartTemp = org.getChartOfAccounts();
  				if(!chart.getChartOfAccountsCode().equals(chartTemp.getChartOfAccountsCode())) {
  					String[] params = new String[]{orgString, chartString};
  					this.putFieldError("org", "dept.org.chart.notmatch", params);
  					return false;
  				}
  			}
  		}
  		return true;
  	}
  
 	Organization getOrganization(String orgCode) {
 		Map<String, String> primaryKeys = new HashMap<String, String>();
 		primaryKeys.put("organizationCode", orgCode);
 		return (Organization) KRADServiceLocator.getBusinessObjectService().findByPrimaryKey(Organization.class, primaryKeys);
 	}
 
 	/**
 	 * Checks for not null and size > 0, but follows the validation pattern
 	 * given in this class for future expanding.
 	 *
 	 * @return true if there is a role, false otherwise.
 	 */
 	protected boolean validateRolePresent(List<TkRole> roles, Date effectiveDate) {
 		boolean valid = false;
 
 		if (roles != null && roles.size() > 0) {
 			int pos = 0;
 			for (TkRole role : roles) {
 				valid |= role.isActive()
 						&& StringUtils.equals(role.getRoleName(),
 								TkConstants.ROLE_TK_DEPT_ADMIN);
 				if(role.getExpirationDate() != null){
 					StringBuffer prefix = new StringBuffer("roles[");
 					prefix.append(pos).append("].");
 					if (effectiveDate.compareTo(role.getExpirationDate()) >= 0
 						|| role.getEffectiveDate().compareTo(
 								role.getExpirationDate()) >= 0) {
 						this.putFieldError(prefix + "expirationDate",
 							"error.role.expiration");
 					} else if (TKUtils.getDaysBetween(role.getEffectiveDate(), role.getExpirationDate()) > 180) {
 		        		   this.putFieldError(prefix + "expirationDate",
 		     						"error.role.expiration.duration");
 		     				valid = false;
 		        	}
 				}
 				pos++;
 			}
 		}
 
 		if (!valid) {
 			this.putGlobalError("role.required");
 		}
 
 		return valid;
 	}
 
 	/**
 	 * The calling method doesn't seem to examine the return value.
 	 */
 	@Override
 	protected boolean processCustomRouteDocumentBusinessRules(
 			MaintenanceDocument document) {
 		boolean valid = false;
 
 		PersistableBusinessObject pbo = (PersistableBusinessObject) this.getNewBo();
 		if (pbo instanceof Department) {
 			Department clr = (Department) pbo;
 			valid = validateChart(clr.getChart());
 			valid &= validateOrg(clr.getOrg());
 			valid &= validateChartAndOrg(clr.getChart(), clr.getOrg());
 			valid &= validateRolePresent(clr.getRoles(), clr.getEffectiveDate());
 			valid &= validateDepartment(clr); // KPME1400
 		}
 
 		return valid;
 	}
 
 }