/**

  * Copyright 2010 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.osedu.org/licenses/ECL-2.0

  *

  * 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.student.core.assembly.old;

 import java.util.HashMap;

 import java.util.List;

 import java.util.Map;

 import org.apache.commons.lang.StringUtils;

 import org.apache.log4j.Logger;

 import org.kuali.rice.kim.bo.role.dto.KimPermissionInfo;

 import org.kuali.rice.kim.bo.types.dto.AttributeSet;

 import org.kuali.rice.kim.service.IdentityManagementService;

 import org.kuali.student.common.util.security.SecurityUtils;

 import org.kuali.student.core.assembly.data.AssemblyException;

 import org.kuali.student.core.assembly.data.Data;

 import org.kuali.student.core.assembly.data.Metadata;

 import org.kuali.student.core.assembly.dictionary.old.MetadataServiceImpl;

 import org.kuali.student.core.rice.authorization.PermissionType;

 import org.kuali.student.core.validation.dto.ValidationResultInfo;

 import org.kuali.student.core.validation.dto.ValidationResultInfo.ErrorLevel;

 @Deprecated

 public abstract class BaseAssembler<TargetType, SourceType> implements Assembler<TargetType, SourceType> {

     protected final Logger LOG = Logger.getLogger(getClass());

     protected IdentityManagementService permissionService;

     protected MetadataServiceImpl metadataService;

     public enum Permission {

         EDIT("edit"), READ_ONLY("readonly"), UNMASK("unmask");

         final String kimName;

         private Permission(String kimName) {

             this.kimName = kimName;

         }

         @Override

         public String toString() {

             return kimName;

         }

         public static Permission kimValueOf(String kimName) {

             for(Permission p : values()) {

                 if(p.kimName.equals(kimName)) {

                     return p;

                 }

             }

             //fall through

             throw new IllegalArgumentException("The value " + kimName + " is not enumerated in Permission"); 

         }

     }

     // TODO: Below must be changed to use constants from KualiStudentKimAttributes class (class is currently in LUM)

     protected Map<String, String> getFieldAccessPermissions(String dtoName, String idType, String id) {

         try {

             //get permissions and turn into a map of fieldName=>access

             String principalId = SecurityUtils.getCurrentUserId();

             AttributeSet qualification = getQualification(idType, id);

             AttributeSet permissionDetails = new AttributeSet("dtoName", dtoName);

             List<? extends KimPermissionInfo> permissions = permissionService.getAuthorizedPermissionsByTemplateName(principalId,

                             PermissionType.FIELD_ACCESS.getPermissionNamespace(), PermissionType.FIELD_ACCESS.getPermissionTemplateName(), permissionDetails, qualification);

             Map<String, String> permMap = new HashMap<String, String>();

             if (permissions != null) {

                 for (KimPermissionInfo permission : permissions) {

                     String dtoFieldKey = permission.getDetails().get("dtoFieldKey");

                     String fieldAccessLevel = permission.getDetails().get("fieldAccessLevel");

                     permMap.put(dtoFieldKey, fieldAccessLevel);

                 }

             }

             return permMap;

         } catch (Exception e) {

             LOG.warn("Error calling permission service.", e);

         }

         return null;

     }

    /* protected Map<String, String> getScreenComponentAccessPermissions(List<SectionViewInfo> sectionViewInfo) {

         return null;

     }*/

         private void setReadOnly(Metadata metadata, boolean readOnly) {

                 metadata.setCanEdit(!readOnly);

                 Map<String, Metadata> childProperties = metadata.getProperties();

                 if (childProperties != null && childProperties.size() > 0) {

                         for (Metadata child : childProperties.values()) {

                                 setReadOnly(child, readOnly);

                         }

                 }

         }

     @Override

     public Metadata getMetadata(String idType, String id, String type, String state) throws AssemblyException {

         Metadata metadata = metadataService.getMetadata(getDataType(), type, state);

         applyPermissionsToMetadata(metadata,idType, id);

         return metadata;

     }

     protected void applyPermissionsToMetadata(Metadata metadata, String idType, String id){

         Boolean authorized = null;

         if (StringUtils.isNotBlank(id) && checkDocumentLevelPermissions()) {

             AttributeSet qualification = getQualification(idType, id);

                 String currentUser = SecurityUtils.getCurrentUserId();

                 authorized = Boolean.valueOf(permissionService.isAuthorizedByTemplateName(currentUser, PermissionType.EDIT.getPermissionNamespace(),

                                 PermissionType.EDIT.getPermissionTemplateName(), null, qualification));

                         LOG.info("Permission '" + PermissionType.EDIT.getPermissionNamespace() + "/" + PermissionType.EDIT.getPermissionTemplateName() 

                                         + "' for user '" + currentUser + "': " + authorized);

                 metadata.setCanEdit(authorized.booleanValue());

         }  

         if(metadata != null && metadata.getProperties() != null) {

             for(Metadata child : metadata.getProperties().values()) {

                 if(!child.isCanEdit()) {

                     setReadOnly(child, true);

                 }

             }

         }

         // if we're checking doc level perms and user does not have "Edit Document" perm set metadata as readonly

         if (checkDocumentLevelPermissions() && Boolean.FALSE.equals(authorized)) {

                 setReadOnly(metadata, true);

         }

         // if not checking doc level perms or user does have "Edit Document" perm check field level authZ

         else {

                 Map<String, String> permissions = getFieldAccessPermissions(getDtoName(),idType,id);

                 if (permissions != null) {

                     for (Map.Entry<String, String> permission : permissions.entrySet()) {

                         String dtoFieldPath = permission.getKey();

                         String fieldAccessLevel = permission.getValue();

                         String[] fieldPathTokens = getPathTokens(dtoFieldPath);

                         Metadata fieldMetadata = metadata.getProperties().get(fieldPathTokens[0]);

                         for(int i = 1; i < fieldPathTokens.length; i++) {

                             if(fieldMetadata == null) {

                                 break;

                             }

                             fieldMetadata = fieldMetadata.getProperties().get(fieldPathTokens[i]);

                         }

                         if (fieldMetadata != null) {

                             Permission perm = Permission.kimValueOf(fieldAccessLevel);

                             if (Permission.EDIT.equals(perm)) {

                                 setReadOnly(fieldMetadata, false);

                                 //fieldMetadata.setCanEdit(true);

                             }

                         }

                     }

                 }

         }

     }

     public Metadata getDefaultMetadata() {

         return metadataService.getMetadata(getDataType(), null, null);

     }

     protected boolean hasValidationErrors(List<ValidationResultInfo> validationResults) {

         boolean result = false;

         if (validationResults != null) {

             for (ValidationResultInfo validationResult : validationResults) {

                 if (validationResult.getLevel() == ErrorLevel.ERROR) {

                     result = true;

                     break;

                 }

             }

         }

         return result;

     }

     public List<ValidationResultInfo> validate(Data data)  throws AssemblyException {

             List<ValidationResultInfo> validationResults = null; 

         return validationResults;

     }

     private static String[] getPathTokens(String fieldPath) {

         return (fieldPath != null && fieldPath.contains(".") ? fieldPath.split("\\.") : new String[]{fieldPath});

     }

     public boolean checkDocumentLevelPermissions() {

             return false;

     }

     /**

      * 

      * This method should return the data type of the implementing assembler

      * 

      * @return the data type, i.e. "CreditCourseProposal" from the CreditCourseProposalAssembler

      */

     protected abstract String getDataType();

     /**

      * 

      * This method should return the DTO name of the implementing assembler

      * 

      * @return the DTO name, i.e. "kuali.lu.type.CreditCourse" from the CreditCourseProposalAssembler

      */

     protected abstract String getDtoName();

     /**

      * 

      * This method should return the root document property name

      * 

      * @return the document property name, i.e. "course" from the CreditCourseProposalAssembler 

      */

     protected abstract String getDocumentPropertyName();

     /**

      * 

      * This method should return the qualification name for the document type

      * 

      * @return the qualifications in at AttributeSet

      */

     protected abstract AttributeSet getQualification(String idType, String id);

     public void setPermissionService(IdentityManagementService permissionService) {

         this.permissionService = permissionService;

     }

     public void setMetadataService(MetadataServiceImpl metadataService) {

         this.metadataService = metadataService;

     }

 }