package eu.eudat.elastic.query;
import co.elastic.clients.elasticsearch._types.query_dsl.Query;
import co.elastic.clients.elasticsearch._types.query_dsl.QueryBuilders;
import eu.eudat.authorization.AuthorizationFlags;
import eu.eudat.authorization.Permission;
import eu.eudat.commons.enums.DmpAccessType;
import eu.eudat.commons.enums.DmpStatus;
import eu.eudat.commons.enums.DmpVersionStatus;
import eu.eudat.commons.scope.user.UserScope;
import eu.eudat.service.elastic.AppElasticProperties;
import eu.eudat.elastic.data.DmpElasticEntity;
import eu.eudat.elastic.data.nested.NestedDescriptionElasticEntity;
import eu.eudat.service.elastic.ElasticService;
import gr.cite.commons.web.authz.service.AuthorizationService;
import gr.cite.tools.data.query.FieldResolver;
import gr.cite.tools.data.query.QueryFactory;
import gr.cite.tools.elastic.configuration.ElasticProperties;
import gr.cite.tools.elastic.mapper.FieldBasedMapper;
import gr.cite.tools.elastic.query.*;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.context.annotation.Scope;
import org.springframework.data.elasticsearch.client.elc.ElasticsearchTemplate;
import org.springframework.stereotype.Component;

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

@Component
//Like in C# make it Transient
@Scope(BeanDefinition.SCOPE_PROTOTYPE)
public class DmpElasticQuery extends ElasticQuery<DmpElasticEntity, UUID> {

	private String like;
	private Collection<UUID> ids;
	private Collection<UUID> excludedIds;
	private Collection<DmpStatus> statuses;
	private Collection<DmpVersionStatus> versionStatuses;
	private Collection<DmpAccessType> accessTypes;
	private Collection<Integer> versions;
	private Collection<UUID> groupIds;
	private EnumSet<AuthorizationFlags> authorize = EnumSet.of(AuthorizationFlags.None);


	public DmpElasticQuery like(String value) {
		this.like = value;
		return this;
	}

	public DmpElasticQuery ids(UUID value) {
		this.ids = List.of(value);
		return this;
	}

	public DmpElasticQuery ids(UUID... value) {
		this.ids = Arrays.asList(value);
		return this;
	}

	public DmpElasticQuery ids(Collection<UUID> values) {
		this.ids = values;
		return this;
	}

	public DmpElasticQuery excludedIds(Collection<UUID> values) {
		this.excludedIds = values;
		return this;
	}

	public DmpElasticQuery excludedIds(UUID value) {
		this.excludedIds = List.of(value);
		return this;
	}

	public DmpElasticQuery excludedIds(UUID... value) {
		this.excludedIds = Arrays.asList(value);
		return this;
	}

	public DmpElasticQuery versionStatuses(DmpVersionStatus value) {
		this.versionStatuses = List.of(value);
		return this;
	}

	public DmpElasticQuery versionStatuses(DmpVersionStatus... value) {
		this.versionStatuses = Arrays.asList(value);
		return this;
	}

	public DmpElasticQuery versionStatuses(Collection<DmpVersionStatus> values) {
		this.versionStatuses = values;
		return this;
	}

	public DmpElasticQuery accessTypes(DmpAccessType value) {
		this.accessTypes = List.of(value);
		return this;
	}

	public DmpElasticQuery accessTypes(DmpAccessType... value) {
		this.accessTypes = Arrays.asList(value);
		return this;
	}

	public DmpElasticQuery accessTypes(Collection<DmpAccessType> values) {
		this.accessTypes = values;
		return this;
	}

	public DmpElasticQuery statuses(DmpStatus value) {
		this.statuses = List.of(value);
		return this;
	}

	public DmpElasticQuery statuses(DmpStatus... value) {
		this.statuses = Arrays.asList(value);
		return this;
	}

	public DmpElasticQuery statuses(Collection<DmpStatus> values) {
		this.statuses = values;
		return this;
	}

	public DmpElasticQuery versions(Integer value) {
		this.versions = List.of(value);
		return this;
	}

	public DmpElasticQuery versions(Integer... value) {
		this.versions = Arrays.asList(value);
		return this;
	}

	public DmpElasticQuery versions(Collection<Integer> values) {
		this.versions = values;
		return this;
	}

	public DmpElasticQuery groupIds(UUID value) {
		this.groupIds = List.of(value);
		return this;
	}

	public DmpElasticQuery groupIds(UUID... value) {
		this.groupIds = Arrays.asList(value);
		return this;
	}

	public DmpElasticQuery groupIds(Collection<UUID> values) {
		this.groupIds = values;
		return this;
	}

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

	private final QueryFactory queryFactory;
	private final AppElasticProperties appElasticProperties;
	private final ElasticService elasticService;
	private final UserScope userScope;
	private final AuthorizationService authService;
	@Autowired()
	public DmpElasticQuery(ElasticsearchTemplate elasticsearchTemplate, ElasticProperties elasticProperties, QueryFactory queryFactory, AppElasticProperties appElasticProperties, ElasticService elasticService, UserScope userScope, AuthorizationService authService) {
		super(elasticsearchTemplate, elasticProperties);
		this.queryFactory = queryFactory;
		this.appElasticProperties = appElasticProperties;
		this.elasticService = elasticService;
		this.userScope = userScope;
		this.authService = authService;
	}

	@Override
	protected Boolean isFalseQuery() {
		return this.isEmpty(this.ids) || this.isEmpty(this.versionStatuses) || this.isEmpty(this.excludedIds)  || this.isEmpty(this.accessTypes)|| this.isEmpty(this.statuses);
	}

	@Override
	protected Class<DmpElasticEntity> entityClass() {
		return DmpElasticEntity.class;
	}

	@Override
	protected Query applyAuthZ() {
		if (this.authorize.contains(AuthorizationFlags.None)) return null;
		if (this.authorize.contains(AuthorizationFlags.Permission) && this.authService.authorize(Permission.BrowseDmp)) return null;
		UUID userId = null;
		boolean usePublic = this.authorize.contains(AuthorizationFlags.Public);
		if (this.authorize.contains(AuthorizationFlags.DmpAssociated)) userId = this.userScope.getUserIdSafe();

		List<Query> predicates = new ArrayList<>();
		if (usePublic) {
			predicates.add(this.and(
					this.equals(this.elasticFieldOf(DmpElasticEntity._status), DmpStatus.Finalized.getValue()),
					this.equals(this.elasticFieldOf(DmpElasticEntity._accessType), DmpAccessType.Public.getValue())
			));
		}
		if (userId != null) {
			NestedCollaboratorElasticQuery query = this.queryFactory.query(NestedCollaboratorElasticQuery.class).nestedPath(DmpElasticEntity._collaborators);
			query.ids(userId);
			predicates.add(this.nestedQuery(query).build()._toQuery());
		}
		return this.or(predicates)._toQuery();
	}
	
	@Override
	protected Query applyFilters() {
		List<Query> predicates = new ArrayList<>();
		
		if (like != null && !like.isBlank()) {

			if (!like.startsWith("*")) like = "*" + like;
			if (!like.endsWith("*")) like = like + "*";
			ElasticFields elasticFields = this.elasticFieldsOf();
			elasticFields.add("*", null, true);

			predicates.add(this.or(
					this.like(elasticFields, List.of(like))._toQuery(),
					QueryBuilders.nested().path(DmpElasticEntity._collaborators).query(
							this.like(elasticFields, List.of(like))._toQuery()
					).build()._toQuery(),
					QueryBuilders.nested().path(DmpElasticEntity._references).query(
							this.like(elasticFields, List.of(like))._toQuery()
					).build()._toQuery(),
					QueryBuilders.nested().path(DmpElasticEntity._descriptions + "." + NestedDescriptionElasticEntity._references).query(
							this.like(elasticFields, List.of(like))._toQuery()
					).build()._toQuery(),
					QueryBuilders.nested().path(DmpElasticEntity._descriptions + "." + NestedDescriptionElasticEntity._tags).query(
							this.like(elasticFields, List.of(like))._toQuery()
					).build()._toQuery(),
					QueryBuilders.nested().path(DmpElasticEntity._descriptions).query(
							this.like(elasticFields, List.of(like))._toQuery()
					).build()._toQuery()
					
			)._toQuery());
		}
		if (ids != null) {
			predicates.add(this.containsUUID(this.elasticFieldOf(DmpElasticEntity._id), ids)._toQuery());
		}
		if (groupIds != null) {
			predicates.add(this.containsUUID(this.elasticFieldOf(DmpElasticEntity._groupId), groupIds)._toQuery());
		}
		if (versions != null) {
			predicates.add(this.contains(this.elasticFieldOf(DmpElasticEntity._version), versions.toArray(new Integer[versions.size()]))._toQuery());
		}
		if (excludedIds != null) {
			predicates.add(this.not(this.containsUUID(this.elasticFieldOf(DmpElasticEntity._id), excludedIds)._toQuery())._toQuery());
		}
		if (statuses != null) {
			predicates.add(this.contains(this.elasticFieldOf(DmpElasticEntity._status), statuses.stream().map(x-> x.getValue()).collect(Collectors.toList()).toArray(new Short[statuses.size()]))._toQuery());
		}
		if (versionStatuses != null) {
			predicates.add(this.contains(this.elasticFieldOf(DmpElasticEntity._versionStatus), versionStatuses.stream().map(x-> x.getValue()).collect(Collectors.toList()).toArray(new Short[versionStatuses.size()]))._toQuery());
		}
		if (accessTypes != null) {
			predicates.add(this.contains(this.elasticFieldOf(DmpElasticEntity._accessType), accessTypes.stream().map(x-> x.getValue()).collect(Collectors.toList()).toArray(new Short[accessTypes.size()]))._toQuery());
		}

		if (!predicates.isEmpty()) {
			return this.and(predicates);
		} else {
			return null;
		}
	}

	@Override
	public DmpElasticEntity convert(Map<String, Object> rawData, Set<String> columns) {
		DmpElasticEntity mocDoc = new DmpElasticEntity();
		if (columns.contains(DmpElasticEntity._id)) mocDoc.setId(FieldBasedMapper.shallowSafeConversion(rawData.get(DmpElasticEntity._id), UUID.class));
		if (columns.contains(DmpElasticEntity._label)) mocDoc.setLabel(FieldBasedMapper.shallowSafeConversion(rawData.get(DmpElasticEntity._label), String.class));
		if (columns.contains(DmpElasticEntity._description)) mocDoc.setDescription(FieldBasedMapper.shallowSafeConversion(rawData.get(DmpElasticEntity._description), String.class));
		if (columns.contains(DmpElasticEntity._status)) mocDoc.setStatus(FieldBasedMapper.shallowSafeConversion(rawData.get(DmpElasticEntity._status), DmpStatus.class));
		if (columns.contains(DmpElasticEntity._versionStatus)) mocDoc.setVersionStatus(FieldBasedMapper.shallowSafeConversion(rawData.get(DmpElasticEntity._versionStatus), DmpVersionStatus.class));
		if (columns.contains(DmpElasticEntity._version)) mocDoc.setVersion(FieldBasedMapper.shallowSafeConversion(rawData.get(DmpElasticEntity._version), Short.class));
		if (columns.contains(DmpElasticEntity._groupId)) mocDoc.setGroupId(FieldBasedMapper.shallowSafeConversion(rawData.get(DmpElasticEntity._groupId), UUID.class));
		if (columns.contains(DmpElasticEntity._accessType)) mocDoc.setAccessType(FieldBasedMapper.shallowSafeConversion(rawData.get(DmpElasticEntity._accessType), DmpAccessType.class));
		if (columns.contains(DmpElasticEntity._finalizedAt)) mocDoc.setFinalizedAt(FieldBasedMapper.shallowSafeConversion(rawData.get(DmpElasticEntity._finalizedAt), Date.class));
		mocDoc.setCollaborators(this.convertNested(rawData, columns, this.queryFactory.query(NestedCollaboratorElasticQuery.class), DmpElasticEntity._collaborators, null));
		mocDoc.setReferences(this.convertNested(rawData, columns, this.queryFactory.query(NestedReferenceElasticQuery.class), DmpElasticEntity._references, null));
		mocDoc.setDescriptions(this.convertNested(rawData, columns, this.queryFactory.query(NestedDescriptionElasticQuery.class), DmpElasticEntity._descriptions, null));
		return mocDoc;
	}

	@Override
	protected ElasticField fieldNameOf(FieldResolver item) {
		if (item.match(DmpElasticEntity._id)) return this.elasticFieldOf(DmpElasticEntity._id);
		else if (item.match(DmpElasticEntity._label)) return this.elasticFieldOf(DmpElasticEntity._label);
		else if (item.match(DmpElasticEntity._description)) return this.elasticFieldOf(DmpElasticEntity._description);
		else if (item.match(DmpElasticEntity._status)) return this.elasticFieldOf(DmpElasticEntity._status);
		else if (item.match(DmpElasticEntity._version)) return this.elasticFieldOf(DmpElasticEntity._version);
		else if (item.match(DmpElasticEntity._versionStatus)) return this.elasticFieldOf(DmpElasticEntity._versionStatus);
		else if (item.match(DmpElasticEntity._groupId)) return this.elasticFieldOf(DmpElasticEntity._groupId);
		else if (item.match(DmpElasticEntity._finalizedAt)) return this.elasticFieldOf(DmpElasticEntity._finalizedAt);
		else if (item.match(DmpElasticEntity._accessType)) return this.elasticFieldOf(DmpElasticEntity._accessType);
		else if (item.prefix(DmpElasticEntity._collaborators)) return this.queryFactory.query(NestedCollaboratorElasticQuery.class).nestedPath(DmpElasticEntity._collaborators).fieldNameOf(this.extractPrefixed(item, DmpElasticEntity._collaborators));
		else if (item.prefix(DmpElasticEntity._references)) return this.queryFactory.query(NestedReferenceElasticQuery.class).nestedPath(DmpElasticEntity._references).fieldNameOf(this.extractPrefixed(item, DmpElasticEntity._references));
		else if (item.prefix(DmpElasticEntity._descriptions)) return this.queryFactory.query(NestedDescriptionElasticQuery.class).nestedPath(DmpElasticEntity._descriptions).fieldNameOf(this.extractPrefixed(item, DmpElasticEntity._descriptions));
		else return null;
	}

	@Override
	protected String[] getIndex() {
		List<String> indexNames = new ArrayList<>();
		indexNames.add(this.appElasticProperties.getDmpIndexName());
		try {
			this.elasticService.ensureDescriptionIndex();
		} catch (IOException e) {
			throw new RuntimeException(e);
		}
		return indexNames.toArray(new String[indexNames.size()]);
	}

	@Override
	protected UUID toKey(String key) {
		return UUID.fromString(key);
	}

	@Override
	protected ElasticField getKeyField() {
		return this.elasticFieldOf(DmpElasticEntity._id);
	}

	@Override
	protected ElasticNestedQuery<?, ?, ?> nestedQueryOf(FieldResolver item) {
		if (item.prefix(DmpElasticEntity._collaborators)) return this.queryFactory.query(NestedCollaboratorElasticQuery.class).nestedPath(DmpElasticEntity._collaborators);
		else if (item.prefix(DmpElasticEntity._references)) return this.queryFactory.query(NestedReferenceElasticQuery.class).nestedPath(DmpElasticEntity._references);
		else if (item.prefix(DmpElasticEntity._descriptions)) return this.queryFactory.query(NestedDescriptionElasticQuery.class).nestedPath(DmpElasticEntity._descriptions);
		else return null;
	}
}