/**
    * 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.roles;
  
  import java.util.HashMap;
  import java.util.HashSet;
  import java.util.List;
  import java.util.Map;
  import java.util.Set;
  
  import org.apache.commons.lang.StringUtils;
  import org.kuali.hr.job.Job;
  import org.kuali.hr.time.assignment.Assignment;
  import org.kuali.hr.time.department.Department;
  import org.kuali.hr.time.service.base.TkServiceLocator;
  import org.kuali.hr.time.timesheet.TimesheetDocument;
  import org.kuali.hr.time.util.TKContext;
  import org.kuali.hr.time.util.TKUtils;
  import org.kuali.hr.time.util.TkConstants;
  import org.kuali.rice.krad.util.GlobalVariables;
  
  /**
   * TkUserRoles encapsulates the concept of roles for a single user and provides
   * lookup methods for quick Role checking. This object will be stored in TkUser.
   */
  public class TkUserRoles implements UserRoles {
      private boolean synchronousAssignments = false;
      private TkRole globalViewOnly;
      private TkRole systemAdmin;
      private String principalId;
  
      private Map<String, TkRole> orgAdminRolesDept = new HashMap<String, TkRole>();
      private Map<String, TkRole> orgAdminRolesChart = new HashMap<String, TkRole>();
      private Map<Long, TkRole> approverRoles = new HashMap<Long, TkRole>();
      private Map<Long, TkRole> approverDelegateRoles = new HashMap<Long, TkRole>();
      private Map<Long, TkRole> reviewerRoles = new HashMap<Long, TkRole>();
  
      private Map<String, TkRole> deptViewOnlyRoles = new HashMap<String, TkRole>();
      private Set<String> activeAssignmentIds = new HashSet<String>();
      
      public static TkUserRoles getUserRoles(String principalId) {
      	List<TkRole> roles = TkServiceLocator.getTkRoleService().getRoles(principalId, TKUtils.getCurrentDate());
  		List<Assignment> assignments = TkServiceLocator.getAssignmentService().getAssignments(principalId, TKUtils.getCurrentDate());
  		
  		return new TkUserRoles(principalId, roles, assignments);
      }
  
      /**
       * Does not keep reference to the assignment objects.  We just need the IDs,
       * so in future refactoring, if we have a lighter weight call to obtain
       * assignments, we could use that and modify this code.
       *
       * @param roles
       * @param assignments
       */
      private TkUserRoles(String principalId, List<TkRole> roles, List<Assignment> assignments) {
          this.principalId = principalId;
          setRoles(roles);
          setAssignments(assignments);
      }
  
      @Override
      public boolean isLocationAdmin() {
          return getOrgAdminCharts().size() > 0;
      }
  
      @Override
      public boolean isDepartmentAdmin() {
          return getOrgAdminDepartments().size() > 0;
      }
  
      public String getPrincipalId() {
          return principalId;
      }
  
      public void setPrincipalId(String principalId) {
          this.principalId = principalId;
      }
  
      @Override
      public Set<Long> getApproverWorkAreas() {
          Set<Long> workAreas = new HashSet<Long>();
          workAreas.addAll(approverRoles.keySet());
          workAreas.addAll(approverDelegateRoles.keySet());
          return workAreas;
      }
 
     @Override
     public Set<Long> getReviewerWorkAreas() {
         return reviewerRoles.keySet();
     }
 
     @Override
     public Set<String> getOrgAdminDepartments() {
         return orgAdminRolesDept.keySet();
     }
 
     @Override
     public Set<String> getOrgAdminCharts() {
         return orgAdminRolesChart.keySet();
     }
 
     @Override
     public Set<String> getDepartmentViewOnlyDepartments() {
         return deptViewOnlyRoles.keySet();
     }
 
     /**
      * Accessor method to obtain the Set of active Assignment ids for the
      * current employee.
      *
      * @return a Set of active assignment IDs
      */
     @Override
     public Set<String> getActiveAssignmentIds() {
         return activeAssignmentIds;
     }
 
     @Override
     public boolean isSystemAdmin() {
         return systemAdmin != null;
     }
 
     @Override
     public boolean isGlobalViewOnly() {
         return globalViewOnly != null;
     }
 
     public boolean isDeptViewOnly() {
         return deptViewOnlyRoles.size() > 0;
     }
 
     @Override
     public boolean isSynchronous() {
         return synchronousAssignments;
     }
     
 	public boolean isReviewer() {
 		return TkUserRoles.getUserRoles(GlobalVariables.getUserSession().getPrincipalId()).getReviewerWorkAreas().size() > 0;
 	}
 
 	public boolean isApprover() {
 		return TkUserRoles.getUserRoles(GlobalVariables.getUserSession().getPrincipalId()).getApproverWorkAreas().size() > 0;
 	}
 
     /**
      * Place the TkRole objects in the provided List into their appropriate
      * buckets for fast lookup.
      *
      * @param roles A List of TkRole objects for the current user.
      */
     public void setRoles(List<TkRole> roles) {
         for (TkRole role : roles) {
             if (role.getRoleName().equals(TkConstants.ROLE_TK_APPROVER)) {
                 approverRoles.put(role.getWorkArea(), role);
             } else if (role.getRoleName().equals(TkConstants.ROLE_TK_APPROVER_DELEGATE)) {
                 approverDelegateRoles.put(role.getWorkArea(), role);
             } else if (role.getRoleName().equals(TkConstants.ROLE_TK_LOCATION_ADMIN) ||
             			role.getRoleName().equals(TkConstants.ROLE_LV_DEPT_ADMIN)) {
                 if (!StringUtils.isEmpty(role.getChart())) {
                     orgAdminRolesChart.put(role.getChart(), role);
                     List<Department> ds = TkServiceLocator.getDepartmentService().getDepartments(role.getChart(), TKUtils.getCurrentDate());
                     for (Department d : ds) {
                         orgAdminRolesDept.put(d.getDept(), role);
                     }
                 }
             } else if (StringUtils.equals(role.getRoleName(), TkConstants.ROLE_TK_LOCATION_VO)) {
                 if (!StringUtils.isEmpty(role.getChart())) {
                     List<Department> ds = TkServiceLocator.getDepartmentService().getDepartments(role.getChart(), TKUtils.getCurrentDate());
                     for (Department dept : ds) {
                         deptViewOnlyRoles.put(dept.getDept(), role);
                     }
 
                 }
             } else if (role.getRoleName().equals(TkConstants.ROLE_TK_SYS_ADMIN)) {
                 systemAdmin = role;
             } else if (role.getRoleName().equals(TkConstants.ROLE_TK_DEPT_VO)) {
                 deptViewOnlyRoles.put(role.getDepartment(), role);
             } else if (role.getRoleName().equals(TkConstants.ROLE_TK_DEPT_ADMIN)) {
                 orgAdminRolesDept.put(role.getDepartment(), role);
             } else if (role.getRoleName().equals(TkConstants.ROLE_TK_GLOBAL_VO)) {
                 globalViewOnly = role;
             } else if (role.getRoleName().equals(TkConstants.ROLE_TK_REVIEWER)) {
                 reviewerRoles.put(role.getWorkArea(), role);
             }
         }
     }
 
     public void setAssignments(List<Assignment> assignments) {
         for (Assignment a : assignments) {
             activeAssignmentIds.add(a.getTkAssignmentId());
             if (a.isSynchronous())
                 synchronousAssignments = true;
         }
     }
 
     @Override
     public boolean isActiveEmployee() {
         return this.activeAssignmentIds.size() > 0;
     }
 
     @Override
     public boolean isTimesheetApprover() {
         return this.isSystemAdmin() || this.approverRoles.size() > 0 || this.approverDelegateRoles.size() > 0 || this.orgAdminRolesDept.size() > 0;
     }
 
     public boolean isTimesheetReviewer() {
         return this.getReviewerWorkAreas().size() > 0;
     }
 
     @Override
     public boolean isAnyApproverActive() {
         return this.approverRoles.size() > 0 || this.approverDelegateRoles.size() > 0;
     }
 
 
     @Override
     public boolean isApproverForTimesheet(TimesheetDocument doc) {
         boolean approver = false;
 
         if (this.isSystemAdmin()) {
             return true;
         }
 
         List<Assignment> assignments = doc.getAssignments();
         for (Assignment assignment : assignments) {
             if (this.approverRoles.containsKey(assignment.getWorkArea()) || this.approverDelegateRoles.containsKey(assignment.getWorkArea())) {
                 return true;
             }
         }
 
         return approver;
     }
 
     @Override
     public boolean isApproverForTimesheet(String docId) {
         boolean approver = false;
 
         TimesheetDocument doc = TkServiceLocator.getTimesheetService().getTimesheetDocument(docId);
         if (doc != null)
             approver = isApproverForTimesheet(doc);
 
         return approver;
     }
 
     @Override
     public boolean isDocumentWritable(TimesheetDocument document) {
         boolean writable = false;
 
         // Quick escape.
         if (document == null)
             return writable;
 
         // Sysadmin
         writable = this.isSystemAdmin();
         // Owner (and not enroute/final)
         writable |= (StringUtils.equals(this.principalId, document.getPrincipalId())
                 && (StringUtils.equals(TkConstants.ROUTE_STATUS.INITIATED, document.getDocumentHeader().getDocumentStatus()) ||
                 StringUtils.equals(TkConstants.ROUTE_STATUS.SAVED, document.getDocumentHeader().getDocumentStatus()) ||
                 (StringUtils.equals(TkConstants.ROUTE_STATUS.ENROUTE, document.getDocumentHeader().getDocumentStatus()))));
 
 
         if (!writable) {
             // Departmental View Only? || Reviewer || Org Admin || Approver
             // (document object iteration)
             List<Assignment> assignments = document.getAssignments();
             for (Assignment assignment : assignments) {
                 String dept = assignment.getDept();
                 Long wa = assignment.getWorkArea();
                 // Dept admins should not have write access
                 //writable |= this.orgAdminRolesDept.containsKey(dept);
                 writable |= this.approverRoles.containsKey(wa);
                 writable |= this.approverDelegateRoles.containsKey(wa);
                 writable |= this.reviewerRoles.containsKey(wa);
             }
         }
 
         return writable;
     }
 
     @Override
     public boolean isDocumentWritable(String documentId) {
         return isDocumentWritable(TkServiceLocator.getTimesheetService().getTimesheetDocument(documentId));
     }
 
     @Override
     public boolean isDocumentReadable(String documentId) {
         boolean readable = false;
 
         if (documentId != null) {
             return isDocumentReadable(TkServiceLocator.getTimesheetService().getTimesheetDocument(documentId));
         }
 
         return readable;
     }
 
     @Override
     public boolean isDocumentReadable(TimesheetDocument document) {
         boolean readable = false;
 
         // Quick escape.
         if (document == null)
             return readable;
 
         // Sysadmin
         readable = this.isSystemAdmin();
         // Owner
         readable |= StringUtils.equals(this.principalId, document.getPrincipalId());
         // Global VO
         readable |= this.isGlobalViewOnly();
 
         if (!readable) {
             // Departmental View Only? || Reviewer || Org Admin || Approver
             // (document object iteration)
             List<Assignment> assignments = document.getAssignments();
             for (Assignment assignment : assignments) {
                 String dept = assignment.getDept();
                 Long wa = assignment.getWorkArea();
 
                 readable |= this.orgAdminRolesDept.containsKey(dept);
                 readable |= this.approverRoles.containsKey(wa);
                 readable |= this.approverDelegateRoles.containsKey(wa);
                 readable |= this.reviewerRoles.containsKey(wa);
                 readable |= this.deptViewOnlyRoles.containsKey(dept);
                 readable |= this.reviewerRoles.containsKey(wa);
             }
         }
 
         return readable;
     }
 
     private boolean isLocationAdmin(TimesheetDocument doc) {
         for (Assignment assign : doc.getAssignments()) {
             String location = assign.getJob().getLocation();
             return this.orgAdminRolesChart.containsKey(location);
         }
         return false;
     }
 
     private boolean isDepartmentAdmin(TimesheetDocument doc) {
         for (Assignment assign : doc.getAssignments()) {
             String dept = assign.getDept();
             return this.orgAdminRolesDept.containsKey(dept);
         }
         return false;
     }
 
     @Override
     public boolean canSubmitTimesheet(TimesheetDocument doc) {
         if (StringUtils.equals(TKContext.getPrincipalId(), doc.getPrincipalId())) {
             return true;
         }
 
         if (this.isApproverForTimesheet(doc)) {
             return true;
         }
 
         //System admins can route the document as well as the employee
         if (this.isSystemAdmin()) {
             return true;
         }
         return false;
     }
 
     @Override
     public boolean canSubmitTimesheet(String docId) {
         TimesheetDocument doc = TkServiceLocator.getTimesheetService().getTimesheetDocument(docId);
         return canSubmitTimesheet(doc);
     }
 
     @Override
     public boolean isApproverForPerson(String principalId) {
         List<Assignment> lstAssignment = TkServiceLocator.getAssignmentService().getAssignments(principalId, TKUtils.getCurrentDate());
 
         for (Assignment assignment : lstAssignment) {
             if (getUserRoles(GlobalVariables.getUserSession().getPrincipalId()).getApproverWorkAreas().contains(assignment.getWorkArea())) {
                 return true;
             }
         }
 
         return false;
 
     }
 
     @Override
     public boolean isDepartmentAdminForPerson(String principalId) {
         UserRoles userRoles = getUserRoles(GlobalVariables.getUserSession().getPrincipalId());
 
         // Department admin
         // Department view only
         if (userRoles.isDepartmentAdmin() || userRoles.isDeptViewOnly()) {
         	List<Job> jobs = TkServiceLocator.getJobService().getJobs(principalId,TKUtils.getCurrentDate());
             for (Job job : jobs) {
                 if (getOrgAdminDepartments().contains(job.getDept())) {
                     return true;
                 }
             }
         }
 
         return false;
     }
 
     @Override
     public boolean isDeptViewOnlyForPerson(String principalId) {
         return isDepartmentAdminForPerson(principalId);
     }
 
     @Override
     public boolean isLocationAdminForPerson(String principalId) {
         List<TkRole> roles = TkServiceLocator.getTkRoleService().getRoles(principalId, TKUtils.getCurrentDate());
 
         if (roles.size() > 0) {
             for (TkRole role : roles) {
                 if (this.getOrgAdminCharts().contains(role.getChart())) {
                     return true;
                 }
             }
         }
 
         return false;
     }
 
     @Override
     public boolean isTimesheetReviewerForPerson(String principalId) {
         List<Assignment> lstAssignment = TkServiceLocator.getAssignmentService().getAssignments(principalId, TKUtils.getCurrentDate());
 
         for (Assignment assignment : lstAssignment) {
             if (getReviewerWorkAreas().contains(assignment.getWorkArea())) {
                 return true;
             }
         }
         return false;
     }
 }