EDIT

// $Id$

/**

* 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.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.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

    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 void updateTitleCache(Class<? extends AgentBase> clazz, Integer stepSize, IIdentifiableEntityCacheStrategy<AgentBase> cacheStrategy, IProgressMonitor monitor) {

		if (clazz == null){

			clazz = AgentBase.class;

		}

		super.updateTitleCacheImpl(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) {

        Integer numberOfResults = dao.countInstitutionalMemberships(person);

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

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

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

		}

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

	}

	@Override

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

		Integer numberOfResults = dao.countMembers(team);

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

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

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

		}

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

	}

	@Override

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

		Integer numberOfResults = dao.countAddresses(agent);

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

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

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

		}

		return new DefaultPagerImpl<Address>(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() {

		return dao.getInstitutionUuidAndTitleCache();

	}

	@Override

	@Transactional(readOnly = false)

    public DeleteResult delete(UUID agentUUID){

		AgentBase base = dao.load(agentUUID);

		DeleteResult result = this.isDeletable(base, null);

    	if (result.isOk()){

			if (base instanceof Team){

				Team baseTeam = (Team) base;

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

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

				for (Person member:members){

					temp.add(member);

				}

				for (Person member: temp){

					members.remove(member);

				}

			}

			saveOrUpdate(base);

			dao.delete(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 {

	    UpdateResult result = new UpdateResult();

        Team team = Team.NewInstance();

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

		strategy.setDefaultMergeMode(MergeMode.SECOND);

		strategy.setDefaultCollectionMergeMode(MergeMode.SECOND);

		strategy.setDeleteSecondObject(true);

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

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

		}

		try {

			this.save(team);

			team.setProtectedNomenclaturalTitleCache(false);

			team.setProtectedTitleCache(true);

			team.setTitleCache(person.getTitleCache(), true);

			genericDao.merge(team, person, strategy);

			//team.addTeamMember(person);

			//this.save(team);

//			team.setNomenclaturalTitle(person.getNomenclaturalTitle(), true);

		} catch (Exception e) {

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

		}

		result.setCdmEntity(team);

        return result;

	}

	@Override

    @Transactional(readOnly = false)

    public List<Person> getAllAgentsUsedAsUser(){

	    return dao.getPersonsUsedAsUser();

	}

}