package org.kuali.student.lum.lu.ui.dependency.server;
   
   import java.util.ArrayList;
   import java.util.List;
   
   import org.kuali.student.core.statement.dto.ReqComponentInfo;
   import org.kuali.student.core.statement.dto.StatementTreeViewInfo;
   import org.kuali.student.core.statement.service.StatementService;
   import org.kuali.student.core.statement.ui.client.widgets.rules.ReqComponentInfoUi;
  import org.kuali.student.core.statement.ui.client.widgets.rules.RulesUtil;
  import org.kuali.student.lum.lu.ui.dependency.client.service.DependencyAnalysisRpcService;
  import org.kuali.student.lum.program.dto.ProgramRequirementInfo;
  import org.kuali.student.lum.program.service.ProgramService;
  
  import com.google.gwt.user.server.rpc.RemoteServiceServlet;
  
  public class DependencyAnalysisRpcServlet extends RemoteServiceServlet implements DependencyAnalysisRpcService{
  
  	private static final long serialVersionUID = 1L;
  	
  	StatementService statementService;
  	ProgramService programService;
  
  	@Override
  	public String getRequirementComponentNL(String reqComponentId) {		
  		return null;
  	}
  
  	@Override
  	public List<String> getRequirementComponentNL(List<String> reqComponentIds) throws Exception{		
  		List<String> reqComponents = new ArrayList<String>();
  		for (String reqComponentId:reqComponentIds){			
  			String reqCompNL = statementService.getNaturalLanguageForReqComponent(reqComponentId, "KUALI.RULE", "en");
  			reqComponents.add(reqCompNL);
  		}
  		
  		return reqComponents;
  	}
  
  		
  	@Override
  	public ProgramRequirementInfo getProgramRequirement(String reqId) throws Exception {
  		ProgramRequirementInfo programRequirementInfo = programService.getProgramRequirement(reqId, null, null);
  		
  		setProgReqNL(programRequirementInfo);
  		return programRequirementInfo;
  	}
  
  	public StatementService getStatementService() {
  		return statementService;
  	}
  
  	public void setStatementService(StatementService statementService) {
  		this.statementService = statementService;
  	}
  
  	public ProgramService getProgramService() {
  		return programService;
  	}
  
  	public void setProgramService(ProgramService programService) {
  		this.programService = programService;
  	}
  
      private void setProgReqNL(ProgramRequirementInfo programRequirementInfo) throws Exception {
          setReqCompNL(programRequirementInfo.getStatement());
      }
  
      private void setReqCompNL(StatementTreeViewInfo tree) throws Exception {
          List<StatementTreeViewInfo> statements = tree.getStatements();
          List<ReqComponentInfo> reqComponentInfos = tree.getReqComponents();
  
           if ((statements != null) && (statements.size() > 0)) {
              // retrieve all statements
              for (StatementTreeViewInfo statement : statements) {
                  setReqCompNL(statement); // inside set the children of this statementTreeViewInfo
              }
          } else if ((reqComponentInfos != null) && (reqComponentInfos.size() > 0)) {
              // retrieve all req. component LEAFS
          	for (int i = 0; i < reqComponentInfos.size(); i++) {
          		ReqComponentInfoUi reqUi = RulesUtil.clone(reqComponentInfos.get(i));
          		reqUi.setNaturalLanguageTranslation(statementService.translateReqComponentToNL(reqUi, "KUALI.RULE", "en"));
          		reqUi.setPreviewNaturalLanguageTranslation(statementService.translateReqComponentToNL(reqUi, "KUALI.RULE.PREVIEW", "en"));
          		reqComponentInfos.set(i, reqUi);
          	}
          }
      }
  
  }