/**
    * 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.common.ui.server.gwt.old;
  
  import java.util.Map;
  
  import org.apache.commons.lang.StringUtils;
  import org.apache.log4j.Logger;
  import org.kuali.rice.kew.service.WorkflowUtility;
  import org.kuali.rice.kew.webservice.SimpleDocumentActionsWebService;
  import org.kuali.rice.kim.bo.types.dto.AttributeSet;
  import org.kuali.rice.kim.service.IdentityManagementService;
  import org.kuali.rice.kim.service.IdentityManagementService;
  import org.kuali.student.common.assembly.data.AssemblyException;
  import org.kuali.student.common.assembly.data.Data;
  import org.kuali.student.common.assembly.data.Metadata;
  import org.kuali.student.common.assembly.old.Assembler;
  import org.kuali.student.common.assembly.old.data.SaveResult;
  import org.kuali.student.common.rice.StudentIdentityConstants;
  import org.kuali.student.common.rice.authorization.PermissionType;
  import org.kuali.student.common.ui.client.service.BaseDataOrchestrationRpcService;
  import org.kuali.student.common.ui.client.service.DataSaveResult;
  import org.kuali.student.common.ui.client.service.exceptions.OperationFailedException;
  import org.kuali.student.common.ui.shared.IdAttributes;
  import org.kuali.student.common.util.security.SecurityUtils;
  
  import com.google.gwt.user.server.rpc.RemoteServiceServlet;
  
  /**
   * Generic implementation of data orchestration calls and workflow calls
   *
   */
  @Deprecated
  public abstract class AbstractBaseDataOrchestrationRpcGwtServlet extends RemoteServiceServlet implements BaseDataOrchestrationRpcService {
  	//FIXME issues:
  	// -The Type/state config is hardcoded here which will cause troubles with different types and states
  	// -Workflow filter should be combined with this for save
  	// -The exception handling here needs standardization.  Should RPC errors throw operation failed with just the message and log the message and exception?
  	// also should calls that return Boolean ever throw exceptions?
  
  	private static final long serialVersionUID = 1L;
  
  	final Logger LOG = Logger.getLogger(AbstractBaseDataOrchestrationRpcGwtServlet.class);
  
  	private Assembler<Data, Void> assembler;
  
      private SimpleDocumentActionsWebService simpleDocService;
      private WorkflowUtility workflowUtilityService;
  	private IdentityManagementService permissionService;
  	private IdentityManagementService identityService;
  
  	@Override
  	public Data getData(String dataId) {
  		try {
  			return assembler.get(dataId);
  		} catch (AssemblyException e) {
  			LOG.error("Error getting Data.",e);
  		}
  		return null;
  	}
  
  	@Override
  	public Metadata getMetadata(String id, Map<String,String> idAttributes) {
  
  		try {
  		    //FIXME: should not pass empty id. What to do here?
  			String idType = "";
  			if (idAttributes != null){
  				idType = idAttributes.get(IdAttributes.ID_TYPE);
  			}
  			return assembler.getMetadata(idType, id, getDefaultMetaDataType(), getDefaultMetaDataState());
  		} catch (AssemblyException e) {
  			LOG.error("Error getting Metadata.",e);
  		}
  		return null;
  	}
  
  	@Override
  	public DataSaveResult saveData(Data data) throws OperationFailedException {
  		try {
  			SaveResult<Data> saveResult = assembler.save(data);
  			if (saveResult != null) {
  				return new DataSaveResult(saveResult.getValidationResults(), saveResult.getValue());
  			}
  		} catch (Exception e) {
  			LOG.error("Unable to save", e);
 			throw new OperationFailedException("Unable to save");
 		}
 		return null;
 	}
 
 
 	protected String getCurrentUser() {
 		String username = SecurityUtils.getCurrentUserId();
 		//backdoorId is only for convenience
 		if(username==null&&this.getThreadLocalRequest().getSession().getAttribute("backdoorId")!=null){
 			username=(String)this.getThreadLocalRequest().getSession().getAttribute("backdoorId");
         }
 		return username;
 	}
 
 	protected boolean checkDocumentLevelPermissions() {
 		return false;
 	}
 
 	public Boolean isAuthorized(PermissionType type, Map<String,String> attributes) {
 		String user = getCurrentUser();
 		boolean result = false;
 		if (checkDocumentLevelPermissions()) {
 			if (type == null) {
 				return null;
 			}
 			String namespaceCode = type.getPermissionNamespace();
 			String permissionTemplateName = type.getPermissionTemplateName();
 			AttributeSet roleQuals = new AttributeSet(StudentIdentityConstants.DOCUMENT_TYPE_NAME, getDefaultWorkflowDocumentType());
 			if (attributes != null) {
 				roleQuals.putAll(attributes);
 			}
 			if (StringUtils.isNotBlank(namespaceCode) && StringUtils.isNotBlank(permissionTemplateName)) {
 				LOG.info("Checking Permission '" + namespaceCode + "/" + permissionTemplateName + "' for user '" + user + "'");
 				result = getPermissionService().isAuthorizedByTemplateName(user, namespaceCode, permissionTemplateName, null, roleQuals);
 			}
 			else {
 				LOG.info("Can not check Permission with namespace '" + namespaceCode + "' and template name '" + permissionTemplateName + "' for user '" + user + "'");
 				return Boolean.TRUE;
 			}
 		}
 		else {
 			LOG.info("Will not check for document level permissions. Defaulting authorization to true.");
 			result = true;
 		}
 		LOG.info("Result of authorization check for user '" + user + "': " + result);
 		return Boolean.valueOf(result);
 	}
 
 	protected abstract String deriveAppIdFromData(Data data);
 	protected abstract String deriveDocContentFromData(Data data);
 	protected abstract String getDefaultWorkflowDocumentType();
 	protected abstract String getDefaultMetaDataState();
 	protected abstract String getDefaultMetaDataType();
 
 	//POJO methods
 	public void setAssembler(Assembler<Data, Void> assembler) {
 		this.assembler = assembler;
 	}
 
 	public IdentityManagementService getPermissionService() {
         return permissionService;
     }
 
     public void setPermissionService(IdentityManagementService permissionService) {
         this.permissionService = permissionService;
     }
 
 	public IdentityManagementService getIdentityService() {
     	return identityService;
     }
 
 	public void setIdentityService(IdentityManagementService identityService) {
     	this.identityService = identityService;
     }
 
 	public void setSimpleDocService(SimpleDocumentActionsWebService simpleDocService) {
 		this.simpleDocService = simpleDocService;
 	}
 
 	public void setWorkflowUtilityService(WorkflowUtility workflowUtilityService) {
 		this.workflowUtilityService = workflowUtilityService;
 	}
 
 	protected Assembler<Data, Void> getAssembler() {
 		return assembler;
 	}
 
 	protected SimpleDocumentActionsWebService getSimpleDocService() {
 		return simpleDocService;
 	}
 
 	protected WorkflowUtility getWorkflowUtilityService() {
 		return workflowUtilityService;
 	}
 
 
 }