package org.cateproject.service.impl;
   
   import java.util.ArrayList;
   import java.util.List;
   
   import org.cateproject.persistence.dao.bhl.BiodiversityHeritageLibraryDAO;
   import org.cateproject.service.BiodiversityHeritageLibraryService;
   import eu.etaxonomy.cdm.api.service.pager.Pager;
   import eu.etaxonomy.cdm.api.service.pager.impl.DefaultPagerImpl;
  import org.mobot.NameServiceStub.Name;
  import org.mobot.NameServiceStub.Title;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.stereotype.Service;
  
  @Service("biodiversityHeritageLibraryService")
  public class BiodiversityHeritageLibraryServiceImpl implements BiodiversityHeritageLibraryService {
  
  	private BiodiversityHeritageLibraryDAO biodiversityHeritageLibraryDAO;
  	
  	@Autowired
  	public void setBiodiversityHeritageLibraryDAO(BiodiversityHeritageLibraryDAO biodiversityHeritageLibraryDAO) {
  		this.biodiversityHeritageLibraryDAO = biodiversityHeritageLibraryDAO;
  	}
  
  	public Pager<Title> getTitles(String nameString, Integer pageNumber, Integer pageSize) {
  		Pager<Title> result;
  		
  		List<Name> names = biodiversityHeritageLibraryDAO.searchNames(nameString);
  		
  		List<Title> titles = new ArrayList<Title>();
  		
  		Name name = null;
  		for(Name n : names) {
  			if(n.getNameConfirmed().equals(nameString)) {
  				name = n;
  				break;
  			}
  		}
  		
  		if(name != null) {
  			name = biodiversityHeritageLibraryDAO.getNameDetail(name);
  			for(Title title : name.getTitles().getTitle()) {
  				titles.add(title);
  			}
  			if(titles.size() < ((pageNumber + 1) * pageSize)) { // There are less titles than we want
  				if(titles.size() < (pageNumber * pageSize)) { // in fact, no titles should appear in this pager
  					result = new DefaultPagerImpl<Title>(pageNumber, name.getTitles().getTitle().length, pageSize, new ArrayList<Title>());
  				} else { // return a pager with as many titles as we can put into it
  			        result = new DefaultPagerImpl<Title>(pageNumber, name.getTitles().getTitle().length, pageSize, titles.subList(pageSize * pageNumber, titles.size()));
  				}
  			} else { // return a pager
  				result = new DefaultPagerImpl<Title>(pageNumber, name.getTitles().getTitle().length, pageSize, titles.subList(pageSize * pageNumber, pageSize * (pageNumber + 1)));
  			}
  		} else { // return an empty pager
  			result = new DefaultPagerImpl<Title>(pageNumber, 0, pageSize, titles);
  		}
  		
  		return result;
  	}
  }