package eu.eudat.model.builder;

import eu.eudat.authorization.AffiliatedResource;
import eu.eudat.authorization.AuthorizationFlags;
import eu.eudat.authorization.authorizationcontentresolver.AuthorizationContentResolver;
import eu.eudat.commons.JsonHandlingService;
import eu.eudat.commons.enums.EntityType;
import eu.eudat.commons.types.dmp.DmpPropertiesEntity;
import eu.eudat.convention.ConventionService;
import eu.eudat.data.DmpEntity;
import eu.eudat.model.*;
import eu.eudat.model.builder.dmpproperties.DmpPropertiesBuilder;
import eu.eudat.query.*;
import gr.cite.commons.web.authz.service.AuthorizationService;
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 DmpBuilder extends BaseBuilder<Dmp, DmpEntity> {

    private final QueryFactory queryFactory;

    private final BuilderFactory builderFactory;
    private final JsonHandlingService jsonHandlingService;
    private final AuthorizationService authorizationService;
    private final AuthorizationContentResolver authorizationContentResolver;

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

    @Autowired
    public DmpBuilder(ConventionService conventionService,
                      QueryFactory queryFactory,
                      BuilderFactory builderFactory, JsonHandlingService jsonHandlingService, AuthorizationService authorizationService, AuthorizationContentResolver authorizationContentResolver) {
        super(conventionService, new LoggerService(LoggerFactory.getLogger(DmpBuilder.class)));
        this.queryFactory = queryFactory;
        this.builderFactory = builderFactory;
	    this.jsonHandlingService = jsonHandlingService;
	    this.authorizationService = authorizationService;
	    this.authorizationContentResolver = authorizationContentResolver;
    }

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

    @Override
    public List<Dmp> 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<Dmp> models = new ArrayList<>();

        FieldSet entityDoisFields = fields.extractPrefixed(this.asPrefix(Dmp._entityDois));
        Map<UUID, List<EntityDoi>> entityDoisMap = this.collectEntityDois(entityDoisFields, data);

        FieldSet dmpReferencesFields = fields.extractPrefixed(this.asPrefix(Dmp._dmpReferences));
        Map<UUID, List<DmpReference>> dmpReferencesMap = this.collectDmpReferences(dmpReferencesFields, data);

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

        FieldSet userFields = fields.extractPrefixed(this.asPrefix(Dmp._creator));
        Map<UUID, User> userItemsMap = this.collectUsers(userFields, data);

        FieldSet blueprintFields = fields.extractPrefixed(this.asPrefix(Dmp._blueprint));
        Map<UUID, DmpBlueprint> blueprintItemsMap = this.collectDmpBlueprints(blueprintFields, data);

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

        FieldSet dmpDescriptionTemplatesFields = fields.extractPrefixed(this.asPrefix(Dmp._dmpDescriptionTemplates));
        Map<UUID, List<DmpDescriptionTemplate>> dmpDescriptionTemplatesMap = this.collectDmpDescriptionTemplates(dmpDescriptionTemplatesFields, data);

        Set<String> authorizationFlags = this.extractAuthorizationFlags(fields, Dmp._authorizationFlags, this.authorizationContentResolver.getPermissionNames());
        Map<UUID, AffiliatedResource>  affiliatedResourceMap = authorizationFlags == null || authorizationFlags.isEmpty() ? null : this.authorizationContentResolver.dmpsAffiliation(data.stream().map(DmpEntity::getId).collect(Collectors.toList()));
        
        FieldSet propertiesFields = fields.extractPrefixed(this.asPrefix(Dmp._properties));
        for (DmpEntity d : data) {
            Dmp m = new Dmp();
            if (fields.hasField(this.asIndexer(Dmp._id))) m.setId(d.getId());
            if (fields.hasField(this.asIndexer(Dmp._label))) m.setLabel(d.getLabel());
            if (fields.hasField(this.asIndexer(Dmp._version))) m.setVersion(d.getVersion());
            if (fields.hasField(this.asIndexer(Dmp._status))) m.setStatus(d.getStatus());
            if (fields.hasField(this.asIndexer(Dmp._groupId))) m.setGroupId(d.getGroupId());
            if (fields.hasField(this.asIndexer(Dmp._description))) m.setDescription(d.getDescription());
            if (fields.hasField(this.asIndexer(Dmp._createdAt))) m.setCreatedAt(d.getCreatedAt());
            if (fields.hasField(this.asIndexer(Dmp._updatedAt))) m.setUpdatedAt(d.getUpdatedAt());
            if (fields.hasField(this.asIndexer(Dmp._isActive))) m.setIsActive(d.getIsActive());
            if (fields.hasField(this.asIndexer(Dmp._finalizedAt))) m.setFinalizedAt(d.getFinalizedAt());
            if (fields.hasField(this.asIndexer(Dmp._accessType))) m.setAccessType(d.getAccessType());
            if (fields.hasField(this.asIndexer(Dmp._language))) m.setLanguage(d.getLanguage());
            if (fields.hasField(this.asIndexer(Dmp._versionStatus))) m.setVersionStatus(d.getVersionStatus());
            if (fields.hasField(this.asIndexer(Dmp._publicAfter))) m.setPublicAfter(d.getPublicAfter());
            if (fields.hasField(this.asIndexer(Dmp._hash))) m.setHash(this.hashValue(d.getUpdatedAt()));
            if (!userFields.isEmpty() && userItemsMap != null && userItemsMap.containsKey(d.getCreatorId())) m.setCreator(userItemsMap.get(d.getCreatorId()));
            if (!blueprintFields.isEmpty() && blueprintItemsMap != null && blueprintItemsMap.containsKey(d.getBlueprintId())) m.setBlueprint(blueprintItemsMap.get(d.getBlueprintId()));
            if (entityDoisMap != null && !entityDoisMap.isEmpty() && entityDoisMap.containsKey(d.getId())) m.setEntityDois(entityDoisMap.get(d.getId()));
            if (dmpReferencesMap != null && !dmpReferencesMap.isEmpty() && dmpReferencesMap.containsKey(d.getId())) m.setDmpReferences(dmpReferencesMap.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()));
            if (dmpDescriptionTemplatesMap != null && !dmpDescriptionTemplatesMap.isEmpty() && dmpDescriptionTemplatesMap.containsKey(d.getId())) m.setDmpDescriptionTemplates(dmpDescriptionTemplatesMap.get(d.getId()));
            if (!propertiesFields.isEmpty() && d.getProperties() != null){
                DmpPropertiesEntity propertyDefinition = this.jsonHandlingService.fromJsonSafe(DmpPropertiesEntity.class, d.getProperties());
                m.setProperties(this.builderFactory.builder(DmpPropertiesBuilder.class).authorize(this.authorize).build(propertiesFields, propertyDefinition));
            }
            if (affiliatedResourceMap != null && !authorizationFlags.isEmpty()) m.setAuthorizationFlags(this.evaluateAuthorizationFlags(this.authorizationService, authorizationFlags, affiliatedResourceMap.getOrDefault(d.getId(), null)));
            models.add(m);
        }
        this.logger.debug("build {} items", Optional.of(models).map(List::size).orElse(0));

        return models;
    }

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

        Map<UUID, List<DmpReference>> itemMap;
        FieldSet clone = new BaseFieldSet(fields.getFields()).ensure(this.asIndexer(DmpReference._dmp, DmpReference._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(DmpReferenceBuilder.class).authorize(this.authorize).asMasterKey(query, clone, x -> x.getDmp().getId());

        if (!fields.hasField(this.asIndexer(DmpReference._dmp, Dmp._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<EntityDoi>> collectEntityDois(FieldSet fields, List<DmpEntity> data) throws MyApplicationException {
        if (fields.isEmpty() || data.isEmpty()) return null;
        this.logger.debug("checking related - {}", EntityDoi.class.getSimpleName());

        Map<UUID, List<EntityDoi>> itemMap;
        FieldSet clone = new BaseFieldSet(fields.getFields()).ensure(this.asIndexer(EntityDoi._entityId));
        EntityDoiQuery query = this.queryFactory.query(EntityDoiQuery.class).authorize(this.authorize).types(EntityType.DMP).entityIds(data.stream().map(DmpEntity::getId).distinct().collect(Collectors.toList()));
        itemMap = this.builderFactory.builder(EntityDoiBuilder.class).authorize(this.authorize).asMasterKey(query, clone, EntityDoi::getEntityId);

        if (!fields.hasField(this.asIndexer(EntityDoi._entityId))) {
            itemMap.values().stream().flatMap(List::stream).filter(x -> x != null && x.getEntityId() != null).peek(x -> {
                x.setEntityId(null);
            });
        }

        return itemMap;
    }

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

        Map<UUID, DmpBlueprint> itemMap;
        if (!fields.hasOtherField(this.asIndexer(DmpBlueprint._id))) {
            itemMap = this.asEmpty(
                    data.stream().map(DmpEntity::getBlueprintId).distinct().collect(Collectors.toList()),
                    x -> {
                        DmpBlueprint item = new DmpBlueprint();
                        item.setId(x);
                        return item;
                    },
                    DmpBlueprint::getId);
        } else {
            FieldSet clone = new BaseFieldSet(fields.getFields()).ensure(DmpBlueprint._id);
            DmpBlueprintQuery q = this.queryFactory.query(DmpBlueprintQuery.class).authorize(this.authorize).ids(data.stream().map(DmpEntity::getBlueprintId).distinct().collect(Collectors.toList()));
            itemMap = this.builderFactory.builder(DmpBlueprintBuilder.class).authorize(this.authorize).asForeignKey(q, clone, DmpBlueprint::getId);
        }
        if (!fields.hasField(DmpBlueprint._id)) {
            itemMap.forEach((id, item) -> {
                if (item != null)
                    item.setId(null);
            });
        }

        return itemMap;
    }

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

        Map<UUID, User> itemMap;
        if (!fields.hasOtherField(this.asIndexer(User._id))) {
            itemMap = this.asEmpty(
                    data.stream().map(DmpEntity::getCreatorId).distinct().collect(Collectors.toList()),
                    x -> {
                        User item = new User();
                        item.setId(x);
                        return item;
                    },
                    User::getId);
        } else {
            FieldSet clone = new BaseFieldSet(fields.getFields()).ensure(User._id);
            UserQuery q = this.queryFactory.query(UserQuery.class).authorize(this.authorize).ids(data.stream().map(DmpEntity::getCreatorId).distinct().collect(Collectors.toList()));
            itemMap = this.builderFactory.builder(UserBuilder.class).authorize(this.authorize).asForeignKey(q, clone, User::getId);
        }
        if (!fields.hasField(User._id)) {
            itemMap.forEach((id, item) -> {
                if (item != null)
                    item.setId(null);
            });
        }

        return itemMap;
    }

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

        Map<UUID, List<DmpUser>> itemMap;
        FieldSet clone = new BaseFieldSet(fields.getFields()).ensure(this.asIndexer(DmpUser._dmp, DmpUser._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(DmpUserBuilder.class).authorize(this.authorize).asMasterKey(query, clone, x -> x.getDmp().getId());

        if (!fields.hasField(this.asIndexer(DmpUser._dmp, Dmp._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<Description>> collectDmpDescriptions(FieldSet fields, List<DmpEntity> data) throws MyApplicationException {
        if (fields.isEmpty() || data.isEmpty()) return null;
        this.logger.debug("checking related - {}", Description.class.getSimpleName());

        Map<UUID, List<Description>> itemMap;
        FieldSet clone = new BaseFieldSet(fields.getFields()).ensure(this.asIndexer(Description._dmp, Description._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(DescriptionBuilder.class).authorize(this.authorize).asMasterKey(query, clone, x -> x.getDmp().getId());

        if (!fields.hasField(this.asIndexer(Description._dmp, Dmp._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<DmpDescriptionTemplate>> collectDmpDescriptionTemplates(FieldSet fields, List<DmpEntity> data) throws MyApplicationException {
        if (fields.isEmpty() || data.isEmpty()) return null;
        this.logger.debug("checking related - {}", Description.class.getSimpleName());

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

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

        return itemMap;
    }

}