EDIT

/**

* Copyright (C) 2007 EDIT

* European Distributed Institute of Taxonomy

* http://www.e-taxonomy.eu

*

* The contents of this file are subject to the Mozilla Public License Version 1.1

* See LICENSE.TXT at the top of this package for the full license terms.

*/

package eu.etaxonomy.cdm.api.service;

import java.util.ArrayList;

import java.util.List;

import java.util.UUID;

import org.apache.commons.lang3.StringUtils;

import org.apache.log4j.Logger;

import org.springframework.beans.factory.annotation.Autowired;

import org.springframework.stereotype.Service;

import org.springframework.transaction.annotation.Transactional;

import eu.etaxonomy.cdm.api.service.config.IIdentifiableEntityServiceConfigurator;

import eu.etaxonomy.cdm.api.service.pager.Pager;

import eu.etaxonomy.cdm.api.service.pager.impl.DefaultPagerImpl;

import eu.etaxonomy.cdm.common.monitor.IProgressMonitor;

import eu.etaxonomy.cdm.model.agent.Address;

import eu.etaxonomy.cdm.model.agent.AgentBase;

import eu.etaxonomy.cdm.model.agent.Institution;

import eu.etaxonomy.cdm.model.agent.InstitutionalMembership;

import eu.etaxonomy.cdm.model.agent.Person;

import eu.etaxonomy.cdm.model.agent.Team;

import eu.etaxonomy.cdm.model.agent.TeamOrPersonBase;

import eu.etaxonomy.cdm.model.common.CdmBase;

import eu.etaxonomy.cdm.persistence.dao.agent.IAgentDao;

import eu.etaxonomy.cdm.persistence.dao.common.ICdmGenericDao;

import eu.etaxonomy.cdm.persistence.dto.UuidAndTitleCache;

import eu.etaxonomy.cdm.strategy.cache.common.IIdentifiableEntityCacheStrategy;

import eu.etaxonomy.cdm.strategy.merge.ConvertMergeStrategy;

import eu.etaxonomy.cdm.strategy.merge.DefaultMergeStrategy;

import eu.etaxonomy.cdm.strategy.merge.IMergeStrategy;

import eu.etaxonomy.cdm.strategy.merge.MergeException;

import eu.etaxonomy.cdm.strategy.merge.MergeMode;

/**

 * @author a.mueller

 */

@Service

@Transactional(readOnly = true)

public class AgentServiceImpl

        extends IdentifiableServiceBase<AgentBase,IAgentDao>

        implements IAgentService {

    private static final Logger logger = Logger.getLogger(AgentServiceImpl.class);

    @Autowired

    private ICdmGenericDao genericDao;

	@Override

    @Autowired

	protected void setDao(IAgentDao dao) {

		assert dao != null;

		this.dao = dao;

	}

 	/**

	 * Constructor

	 */

	public AgentServiceImpl(){

		if (logger.isDebugEnabled()) { logger.debug("Load AgentService Bean"); }

	}

	@Override

	@Transactional(readOnly = false)

    public UpdateResult updateCaches(Class<? extends AgentBase> clazz, Integer stepSize, IIdentifiableEntityCacheStrategy<AgentBase> cacheStrategy, IProgressMonitor monitor) {

		if (clazz == null){

			clazz = AgentBase.class;

		}

		return super.updateCachesImpl(clazz, stepSize, cacheStrategy, monitor);

	}

	@Override

	public List<Institution> searchInstitutionByCode(String code) {

		return dao.getInstitutionByCode(code);

	}

	@Override

	public Pager<InstitutionalMembership> getInstitutionalMemberships(Person person, Integer pageSize, Integer pageNumber) {

        long numberOfResults = dao.countInstitutionalMemberships(person);

		List<InstitutionalMembership> results = new ArrayList<>();

		if(numberOfResults > 0) { // no point checking again //TODO use AbstractPagerImpl.hasResultsInRange(numberOfResults, pageNumber, pageSize)

			results = dao.getInstitutionalMemberships(person, pageSize, pageNumber);

		}

		return new DefaultPagerImpl<>(pageNumber, numberOfResults, pageSize, results);

	}

	@Override

	public Pager<Person> getMembers(Team team, Integer pageSize, Integer pageNumber) {

		long numberOfResults = dao.countMembers(team);

		List<Person> results = new ArrayList<>();

		if(numberOfResults > 0) { // no point checking again //TODO use AbstractPagerImpl.hasResultsInRange(numberOfResults, pageNumber, pageSize)

			results = dao.getMembers(team, pageSize, pageNumber);

		}

		return new DefaultPagerImpl<>(pageNumber, numberOfResults, pageSize, results);

	}

	@Override

	public Pager<Address> getAddresses(AgentBase agent, Integer pageSize, Integer pageNumber) {

		long numberOfResults = dao.countAddresses(agent);

		List<Address> results = new ArrayList<>();

		if(numberOfResults > 0) { // no point checking again //TODO use AbstractPagerImpl.hasResultsInRange(numberOfResults, pageNumber, pageSize)

			results = dao.getAddresses(agent, pageSize, pageNumber);

		}

		return new DefaultPagerImpl<>(pageNumber, numberOfResults, pageSize, results);

	}

	@Override

	public List<UuidAndTitleCache<Team>> getTeamUuidAndNomenclaturalTitle() {

		return dao.getTeamUuidAndNomenclaturalTitle();

	}

	@Override

	public List<UuidAndTitleCache<Person>> getPersonUuidAndTitleCache() {

		return dao.getPersonUuidAndTitleCache();

	}

	@Override

	public List<UuidAndTitleCache<Team>> getTeamUuidAndTitleCache() {

		return dao.getTeamUuidAndTitleCache();

	}

	@Override

	public List<UuidAndTitleCache<Institution>> getInstitutionUuidAndTitleCache(Integer limit, String pattern) {

		return dao.getUuidAndAbbrevTitleCache(Institution.class, limit, pattern);

	}

	@Override

	@Transactional(readOnly = false)

    public DeleteResult delete(UUID agentUUID){

	    DeleteResult result = new DeleteResult();

	    if (agentUUID == null){

	        result.setAbort();

	        result.addException(new Exception("Can't delete object without UUID."));

	        return result;

	    }

		AgentBase base = dao.load(agentUUID);

		result = isDeletable(agentUUID, null);

    	if (result.isOk()){

			if (base instanceof Team){

				Team baseTeam = (Team) base;

				List<Person> members = baseTeam.getTeamMembers();

				List<Person> temp = new ArrayList<>();

				for (Person member:members){

					temp.add(member);

				}

				for (Person member: temp){

					members.remove(member);

				}

			}

			saveOrUpdate(base);

			dao.delete(base);

			result.addDeletedObject(base);

		}

		return result;

    }

	@Override

    public DeleteResult delete(AgentBase agent){

		return delete(agent.getUuid());

	}

	@Override

	@Transactional(readOnly = false)

	public UpdateResult convertTeam2Person(UUID teamUuid) throws MergeException {

	    Team team = CdmBase.deproxy(dao.load(teamUuid), Team.class);

	    return convertTeam2Person(team);

	}

	@Override

	public UpdateResult convertTeam2Person(Team team) throws MergeException {

        UpdateResult result = new UpdateResult();

        Person newPerson = null;

		team = CdmBase.deproxy(team, Team.class);

		if (team.getTeamMembers().size() > 1){

			throw new IllegalArgumentException("Team must not have more than 1 member to be convertable into a person");

		}else if (team.getTeamMembers().size() == 1){

		    newPerson = team.getTeamMembers().get(0);

			IMergeStrategy strategy = DefaultMergeStrategy.NewInstance(TeamOrPersonBase.class);

			strategy.setDefaultCollectionMergeMode(MergeMode.FIRST);

			genericDao.merge(newPerson, team, strategy);

		}else if (team.getTeamMembers().isEmpty()){

		    newPerson = Person.NewInstance();

            genericDao.save(newPerson);

			IMergeStrategy strategy = DefaultMergeStrategy.NewInstance(TeamOrPersonBase.class);

			strategy.setDefaultMergeMode(MergeMode.SECOND);

			strategy.setDefaultCollectionMergeMode(MergeMode.SECOND);

			genericDao.merge(newPerson, team, strategy);

		}else{

			throw new IllegalStateException("Unhandled state of team members collection");

		}

		result.setCdmEntity(newPerson);

		return result;

	}

	@Override

	@Transactional(readOnly = false)

	public UpdateResult convertPerson2Team(UUID personUuid) throws MergeException, IllegalArgumentException {

	    Person person = CdmBase.deproxy(dao.load(personUuid), Person.class);

	    return convertPerson2Team(person);

	}

	@Override

	public UpdateResult convertPerson2Team(Person person) throws MergeException, IllegalArgumentException {

	    if (person == null){

	        throw new IllegalArgumentException("Person does not exist.");

	    }

	    UpdateResult result = new UpdateResult();

        Team team = Team.NewInstance();

        ConvertMergeStrategy strategy = ConvertMergeStrategy.NewInstance(TeamOrPersonBase.class);

        strategy.setDefaultMergeMode(MergeMode.SECOND);

        strategy.setDefaultCollectionMergeMode(MergeMode.SECOND);

        if (person.isProtectedTitleCache() || !person.getTitleCache().startsWith("Person#")){  //the later is for checking if the person is empty, this can be done better

            team.setTitleCache(person.getTitleCache(), true);  //as there are no members we set the titleCache to protected (as long as titleCache does not take the protected nomenclatural title but results in '-empty team-' in this situation); for some reason it is necessary to also set the title cache as well here, otherwise it is recomputed during the merge

        }

        strategy.setMergeMode("protectedTitleCache", MergeMode.FIRST); //as we do not add team members, the titleCache of the new team should be always protected

        strategy.setDeleteSecondObject(true);

        if (StringUtils.isNotBlank(person.getNomenclaturalTitle())){

            team.setNomenclaturalTitleCache(person.getNomenclaturalTitle(), true);  //sets the protected flag always to true, this is necessary as long as person does not have a nomenclatural title cache; maybe setting the protected title itself is not necessary but does no harm

        }

        if (! genericDao.isMergeable(team, person, strategy)){

			throw new MergeException("Person can not be transformed into team.");

		}

		try {

			team = this.save(team);

			genericDao.merge(team, person, strategy);

			//Note: we decided  never add the old person as (first) member of the team as there are not many usecases for this.

			//But we may try to parse the old person into members which may handle the case that teams have been stored as unparsed persons

		} catch (Exception e) {

			throw new MergeException("Unhandled merge exception", e);

		}

		result.setCdmEntity(team);

		result.addUpdatedObject(team);

        return result;

	}

    @Override

    public <T extends AgentBase> List<UuidAndTitleCache<T>> getUuidAndAbbrevTitleCache(Class<T> clazz, Integer limit, String pattern) {

        return dao.getUuidAndAbbrevTitleCache(clazz, null, pattern);

    }

    @Override

    public <T extends AgentBase<?>> List<T> findByTitleAndAbbrevTitle(IIdentifiableEntityServiceConfigurator<T> config){

        return dao.findByTitleAndAbbrevTitle(config.getClazz(),config.getTitleSearchStringSqlized(), config.getMatchMode(), config.getCriteria(), config.getPageSize(), config.getPageNumber(), config.getOrderHints(), config.getPropertyPaths());

    }

}