package eu.eudat.model.builder;

import eu.eudat.authorization.AuthorizationFlags;
import eu.eudat.commons.enums.IsActive;
import eu.eudat.convention.ConventionService;
import eu.eudat.data.DmpEntity;
import eu.eudat.model.*;
import eu.eudat.query.DescriptionQuery;
import eu.eudat.query.DmpReferenceQuery;
import eu.eudat.query.DmpUserQuery;
import gr.cite.tools.data.builder.BuilderFactory;
import gr.cite.tools.data.query.QueryFactory;
import gr.cite.tools.exception.MyApplicationException;
import gr.cite.tools.fieldset.BaseFieldSet;
import gr.cite.tools.fieldset.FieldSet;
import gr.cite.tools.logging.DataLogEntry;
import gr.cite.tools.logging.LoggerService;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.config.ConfigurableBeanFactory;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;

import java.util.*;
import java.util.stream.Collectors;

@Component
@Scope(value = ConfigurableBeanFactory.SCOPE_PROTOTYPE)
public class PublicDmpBuilder extends BaseBuilder<PublicDmp, DmpEntity> {

    private final QueryFactory queryFactory;

    private final BuilderFactory builderFactory;

    private EnumSet<AuthorizationFlags> authorize = EnumSet.of(AuthorizationFlags.None);

    @Autowired
    public PublicDmpBuilder(ConventionService conventionService,
                            QueryFactory queryFactory,
                            BuilderFactory builderFactory) {
        super(conventionService, new LoggerService(LoggerFactory.getLogger(PublicDmpBuilder.class)));
        this.queryFactory = queryFactory;
        this.builderFactory = builderFactory;
    }

    public PublicDmpBuilder authorize(EnumSet<AuthorizationFlags> values) {
        this.authorize = values;
        return this;
    }

    @Override
    public List<PublicDmp> build(FieldSet fields, List<DmpEntity> data) throws MyApplicationException {
        this.logger.debug("building for {} items requesting {} fields", Optional.ofNullable(data).map(List::size).orElse(0), Optional.ofNullable(fields).map(FieldSet::getFields).map(Set::size).orElse(0));
        this.logger.trace(new DataLogEntry("requested fields", fields));
        if (fields == null || data == null || fields.isEmpty())
            return new ArrayList<>();

        List<PublicDmp> models = new ArrayList<>();

        FieldSet dmpReferencesFields = fields.extractPrefixed(this.asPrefix(PublicDmp._dmpReferences));
        Map<UUID, List<PublicDmpReference>> dmpReferenceMap = this.collectDmpReferences(dmpReferencesFields, data);

        FieldSet dmpUsersFields = fields.extractPrefixed(this.asPrefix(PublicDmp._dmpUsers));
        Map<UUID, List<PublicDmpUser>> dmpUsersMap = this.collectDmpUsers(dmpUsersFields, data);

        FieldSet descriptionsFields = fields.extractPrefixed(this.asPrefix(PublicDmp._descriptions));
        Map<UUID, List<PublicDescription>> descriptionsMap = this.collectDmpDescriptions(descriptionsFields, data);

        for (DmpEntity d : data) {
            PublicDmp m = new PublicDmp();
            if (fields.hasField(this.asIndexer(PublicDmp._id))) m.setId(d.getId());
            if (fields.hasField(this.asIndexer(PublicDmp._label))) m.setLabel(d.getLabel());
            if (fields.hasField(this.asIndexer(PublicDmp._version))) m.setVersion(d.getVersion());
            if (fields.hasField(this.asIndexer(PublicDmp._description))) m.setDescription(d.getDescription());
            if (fields.hasField(this.asIndexer(PublicDmp._finalizedAt))) m.setFinalizedAt(d.getFinalizedAt());
            if (fields.hasField(this.asIndexer(PublicDmp._updatedAt))) m.setUpdatedAt(d.getUpdatedAt());
            if (fields.hasField(this.asIndexer(PublicDmp._accessType))) m.setAccessType(d.getAccessType());
            if (fields.hasField(this.asIndexer(PublicDmp._status))) m.setStatus(d.getStatus());
            if (fields.hasField(this.asIndexer(PublicDmp._groupId))) m.setGroupId(d.getGroupId());
            if (fields.hasField(this.asIndexer(PublicDmp._accessType))) m.setAccessType(d.getAccessType());

            if (dmpReferenceMap != null && !dmpReferenceMap.isEmpty() && dmpReferenceMap.containsKey(d.getId())) m.setDmpReferences(dmpReferenceMap.get(d.getId()));
            if (dmpUsersMap != null && !dmpUsersMap.isEmpty() && dmpUsersMap.containsKey(d.getId())) m.setDmpUsers(dmpUsersMap.get(d.getId()));
            if (descriptionsMap != null && !descriptionsMap.isEmpty() && descriptionsMap.containsKey(d.getId())) m.setDescriptions(descriptionsMap.get(d.getId()));

            models.add(m);
        }
        this.logger.debug("build {} items", Optional.of(models).map(List::size).orElse(0));

        return models;
    }

    private Map<UUID, List<PublicDmpReference>> collectDmpReferences(FieldSet fields, List<DmpEntity> data) throws MyApplicationException {
        if (fields.isEmpty() || data.isEmpty()) return null;
        this.logger.debug("checking related - {}", PublicDmpReference.class.getSimpleName());

        Map<UUID, List<PublicDmpReference>> itemMap = null;
        FieldSet clone = new BaseFieldSet(fields.getFields()).ensure(this.asIndexer(PublicDmpReference._dmp, PublicDmp._id));
        DmpReferenceQuery query = this.queryFactory.query(DmpReferenceQuery.class).authorize(this.authorize).dmpIds(data.stream().map(DmpEntity::getId).distinct().collect(Collectors.toList()));
        itemMap = this.builderFactory.builder(PublicDmpReferenceBuilder.class).authorize(this.authorize).authorize(this.authorize).asMasterKey(query, clone, x -> x.getDmp().getId());

        if (!fields.hasField(this.asIndexer(PublicDmpReference._dmp, PublicDmp._id))) {
            itemMap.values().stream().flatMap(List::stream).filter(x -> x != null && x.getDmp() != null).peek(x -> {
                x.getDmp().setId(null);
            });
        }

        return itemMap;
    }

    private Map<UUID, List<PublicDmpUser>> collectDmpUsers(FieldSet fields, List<DmpEntity> data) throws MyApplicationException {
        if (fields.isEmpty() || data.isEmpty()) return null;
        this.logger.debug("checking related - {}", PublicDmpUser.class.getSimpleName());

        Map<UUID, List<PublicDmpUser>> itemMap = null;
        FieldSet clone = new BaseFieldSet(fields.getFields()).ensure(this.asIndexer(PublicDmpUser._dmp, PublicDmp._id));
        DmpUserQuery query = this.queryFactory.query(DmpUserQuery.class).authorize(this.authorize).dmpIds(data.stream().map(DmpEntity::getId).distinct().collect(Collectors.toList()));
        itemMap = this.builderFactory.builder(PublicDmpUserBuilder.class).authorize(this.authorize).asMasterKey(query, clone, x -> x.getDmp().getId());

        if (!fields.hasField(this.asIndexer(PublicDmpUser._dmp, PublicDmp._id))) {
            itemMap.values().stream().flatMap(List::stream).filter(x -> x != null && x.getDmp() != null).peek(x -> {
                x.getDmp().setId(null);
            });
        }

        return itemMap;
    }

    private Map<UUID, List<PublicDescription>> collectDmpDescriptions(FieldSet fields, List<DmpEntity> data) throws MyApplicationException {
        if (fields.isEmpty() || data.isEmpty()) return null;
        this.logger.debug("checking related - {}", PublicDescription.class.getSimpleName());

        Map<UUID, List<PublicDescription>> itemMap;
        FieldSet clone = new BaseFieldSet(fields.getFields()).ensure(this.asIndexer(PublicDescription._dmp, PublicDescription._id));
        DescriptionQuery query = this.queryFactory.query(DescriptionQuery.class).authorize(this.authorize).dmpIds(data.stream().map(DmpEntity::getId).distinct().collect(Collectors.toList()));
        itemMap = this.builderFactory.builder(PublicDescriptionBuilder.class).authorize(this.authorize).asMasterKey(query, clone, x -> x.getDmp().getId());

        if (!fields.hasField(this.asIndexer(PublicDescription._dmp, PublicDescription._id))) {
            itemMap.values().stream().flatMap(List::stream).filter(x -> x != null && x.getDmp() != null).peek(x -> {
                x.getDmp().setId(null);
            });
        }

        return itemMap;
    }

}