package eu.eudat.model.builder.commonmodels.description;

import eu.eudat.authorization.AuthorizationFlags;
import eu.eudat.commonmodels.models.description.FieldModel;
import eu.eudat.commonmodels.models.reference.ReferenceModel;
import eu.eudat.commons.enums.FieldType;
import eu.eudat.commons.types.description.FieldEntity;
import eu.eudat.convention.ConventionService;
import eu.eudat.data.ReferenceEntity;
import eu.eudat.model.Reference;
import eu.eudat.model.builder.commonmodels.BaseCommonModelBuilder;
import eu.eudat.model.builder.commonmodels.CommonModelBuilderItemResponse;
import eu.eudat.model.builder.commonmodels.reference.ReferenceCommonModelBuilder;
import eu.eudat.query.ReferenceQuery;
import gr.cite.tools.data.builder.BuilderFactory;
import gr.cite.tools.data.query.QueryFactory;
import gr.cite.tools.exception.MyApplicationException;
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("commonmodels.description")
@Scope(value = ConfigurableBeanFactory.SCOPE_PROTOTYPE)
public class FieldCommonModelBuilder extends BaseCommonModelBuilder<FieldModel, FieldEntity> {
    private final BuilderFactory builderFactory;
    private final QueryFactory queryFactory;
    private EnumSet<AuthorizationFlags> authorize = EnumSet.of(AuthorizationFlags.None);
    private eu.eudat.commons.types.descriptiontemplate.FieldEntity fieldEntity;
    @Autowired
    public FieldCommonModelBuilder(
		    ConventionService conventionService, BuilderFactory builderFactory, QueryFactory queryFactory
    ) {
        super(conventionService, new LoggerService(LoggerFactory.getLogger(FieldCommonModelBuilder.class)));
	    this.builderFactory = builderFactory;
	    this.queryFactory = queryFactory;
    }

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

    public FieldCommonModelBuilder withFieldEntity(eu.eudat.commons.types.descriptiontemplate.FieldEntity fieldEntity) {
        this.fieldEntity = fieldEntity;
        return this;
    }
    @Override
    protected List<CommonModelBuilderItemResponse<FieldModel, FieldEntity>> buildInternal(List<FieldEntity> data) throws MyApplicationException {
        this.logger.debug("building for {}", Optional.ofNullable(data).map(List::size).orElse(0));
        if (data == null || data.isEmpty()) return new ArrayList<>();

        FieldType fieldType = this.fieldEntity != null && this.fieldEntity.getData() != null ? this.fieldEntity.getData().getFieldType() :  FieldType.FREE_TEXT;
        
        Map<UUID, ReferenceModel> referenceItemsMap = FieldType.isReferenceType(fieldType) ? this.collectReferences(data) : null;

        List<CommonModelBuilderItemResponse<FieldModel, FieldEntity>> models = new ArrayList<>();
        for (FieldEntity d : data) {
            FieldModel m = new FieldModel();
            if (this.fieldEntity != null) m.setId(fieldEntity.getId());
            if (FieldType.isDateType(fieldType)) m.setDateValue(d.getDateValue());
            if (FieldType.isTextType(fieldType)) m.setTextValue(d.getTextValue());
            if (FieldType.isTextListType(fieldType)) m.setTextListValue(d.getTextListValue());
            if (FieldType.isReferenceType(fieldType)  && referenceItemsMap != null && d.getTextListValue() != null && !d.getTextListValue().isEmpty()) {
                m.setReferences(new ArrayList<>());
                for (UUID referenceId : d.getTextListValue().stream().map(UUID::fromString).toList()){
                    if (referenceItemsMap.containsKey(referenceId)) m.getReferences().add(referenceItemsMap.get(referenceId));
                }
            }
            if (d.getExternalIdentifier() != null && FieldType.isExternalIdentifierType(fieldType))  m.setExternalIdentifier(this.builderFactory.builder(ExternalIdentifierCommonModelBuilder.class).authorize(this.authorize).build(d.getExternalIdentifier()));

            models.add(new CommonModelBuilderItemResponse<>(m, d));
        }

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

        return models;
    }

    private Map<UUID, ReferenceModel> collectReferences(List<FieldEntity> data) throws MyApplicationException {
        if (data.isEmpty())
            return null;
        this.logger.debug("checking related - {}", Reference.class.getSimpleName());

        Map<UUID, ReferenceModel> itemMap;
        
        ReferenceQuery q = this.queryFactory.query(ReferenceQuery.class).authorize(this.authorize).ids(data.stream().map(FieldEntity::getTextListValue).flatMap(List::stream).map(UUID::fromString).distinct().collect(Collectors.toList()));
        itemMap = this.builderFactory.builder(ReferenceCommonModelBuilder.class).authorize(this.authorize).asForeignKey(q, ReferenceEntity::getId);

        return itemMap;
    }

}