package gr.cite.annotation.query;

import gr.cite.annotation.authorization.AuthorizationFlags;
import gr.cite.annotation.authorization.Permission;
import gr.cite.annotation.common.enums.AnnotationProtectionType;
import gr.cite.annotation.common.enums.IsActive;
import gr.cite.annotation.common.scope.user.UserScope;
import gr.cite.annotation.data.AnnotationEntity;
import gr.cite.annotation.data.EntityUserEntity;
import gr.cite.annotation.model.Annotation;
import gr.cite.annotation.model.EntityUser;
import gr.cite.annotation.query.utils.BuildSubQueryInput;
import gr.cite.annotation.query.utils.QueryUtilsService;
import gr.cite.commons.web.authz.service.AuthorizationService;
import gr.cite.tools.data.query.FieldResolver;
import gr.cite.tools.data.query.QueryBase;
import gr.cite.tools.data.query.QueryContext;
import jakarta.persistence.Tuple;
import jakarta.persistence.criteria.CriteriaBuilder;
import jakarta.persistence.criteria.Predicate;
import jakarta.persistence.criteria.Subquery;
import org.springframework.beans.factory.config.ConfigurableBeanFactory;
import org.springframework.context.annotation.Scope;
import org.springframework.stereotype.Component;

import java.time.Instant;
import java.util.*;

@Component
@Scope(value = ConfigurableBeanFactory.SCOPE_PROTOTYPE)
public class AnnotationQuery extends QueryBase<AnnotationEntity> {

    private String like;

    private Collection<UUID> ids;

    private Collection<UUID> excludedIds;

    private Collection<IsActive> isActives;

    private Collection<UUID> entityIds;

    private Collection<String> entityTypes;

    private Collection<String> anchors;

    private Collection<UUID> threadIds;

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

    private final UserScope userScope;

    private final QueryUtilsService queryUtilsService;

    private final AuthorizationService authService;

    public AnnotationQuery(UserScope userScope, QueryUtilsService queryUtilsService, AuthorizationService authService) {
        this.userScope = userScope;
	    this.queryUtilsService = queryUtilsService;
	    this.authService = authService;
    }

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

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

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

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

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

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

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

    public AnnotationQuery isActive(IsActive value) {
        this.isActives = List.of(value);
        return this;
    }

    public AnnotationQuery isActive(IsActive... value) {
        this.isActives = Arrays.asList(value);
        return this;
    }

    public AnnotationQuery isActive(Collection<IsActive> values) {
        this.isActives = values;
        return this;
    }

    public AnnotationQuery entityIds(UUID value) {
        this.entityIds = List.of(value);
        return this;
    }

    public AnnotationQuery entityIds(UUID... value) {
        this.entityIds = Arrays.asList(value);
        return this;
    }

    public AnnotationQuery entityIds(Collection<UUID> values) {
        this.entityIds = values;
        return this;
    }

    public AnnotationQuery entityTypes(String value) {
        this.entityTypes = List.of(value);
        return this;
    }

    public AnnotationQuery entityTypes(String... value) {
        this.entityTypes = Arrays.asList(value);
        return this;
    }

    public AnnotationQuery entityTypes(Collection<String> values) {
        this.entityTypes = values;
        return this;
    }

    public AnnotationQuery anchors(String value) {
        this.anchors = List.of(value);
        return this;
    }

    public AnnotationQuery anchors(String... value) {
        this.anchors = Arrays.asList(value);
        return this;
    }

    public AnnotationQuery anchors(Collection<String> values) {
        this.anchors = values;
        return this;
    }

    public AnnotationQuery threadIds(UUID value) {
        this.threadIds = List.of(value);
        return this;
    }

    public AnnotationQuery threadIds(UUID... value) {
        this.threadIds = Arrays.asList(value);
        return this;
    }

    public AnnotationQuery threadIds(Collection<UUID> values) {
        this.threadIds = values;
        return this;
    }

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

    @Override
    protected Boolean isFalseQuery() {
        return this.isEmpty(this.ids) || this.isEmpty(this.excludedIds) || this.isEmpty(this.isActives) || this.isEmpty(this.entityIds);
    }

    @Override
    protected Class<AnnotationEntity> entityClass() {
        return AnnotationEntity.class;
    }
    
    @Override
    protected <X, Y> Predicate applyAuthZ(QueryContext<X, Y> queryContext) {
        if (this.authorize.contains(AuthorizationFlags.None)) return null;
        if (this.authorize.contains(AuthorizationFlags.Permission) && this.authService.authorize(Permission.BrowseAnnotation)) return null;
        UUID userId = null;
        if (this.authorize.contains(AuthorizationFlags.Associated)) userId = this.userScope.getUserIdSafe();
        if (this.authorize.contains(AuthorizationFlags.Owner)) userId = this.userScope.getUserIdSafe();

        List<Predicate> predicates = new ArrayList<>();
        if (userId != null ) {
            UUID finalUserId = userId;
            Subquery<UUID> subquery = this.queryUtilsService.buildSubQuery(new BuildSubQueryInput<>(new BuildSubQueryInput.Builder<>(EntityUserEntity.class, UUID.class)
                    .query(queryContext.Query)
                    .criteriaBuilder(queryContext.CriteriaBuilder)
                    .keyPathFunc((subQueryRoot) -> subQueryRoot.get(EntityUserEntity._entityId))
                    .filterFunc((subQueryRoot, cb) ->
                            cb.and(
                                    cb.equal(subQueryRoot.get(EntityUserEntity._userId), finalUserId),
                                    cb.equal(subQueryRoot.get(EntityUserEntity._isActive), IsActive.Active)
                            )
                    )
            ));
            predicates.add(queryContext.CriteriaBuilder.or(
                    queryContext.CriteriaBuilder.in(queryContext.Root.get(AnnotationEntity._subjectId)).value(userId), 
                    queryContext.CriteriaBuilder.and(
                            queryContext.CriteriaBuilder.equal(queryContext.Root.get(AnnotationEntity._protectionType), AnnotationProtectionType.EntityAccessors),
                            queryContext.CriteriaBuilder.in(queryContext.Root.get(AnnotationEntity._entityId)).value(subquery)  
                    )));
        }
        if (!predicates.isEmpty()) {
            Predicate[] predicatesArray = predicates.toArray(new Predicate[0]);
            return queryContext.CriteriaBuilder.and(predicatesArray);
        } else {
            return queryContext.CriteriaBuilder.or(); //Creates a false query
        }
    }
    
    @Override
    protected <X, Y> Predicate applyFilters(QueryContext<X, Y> queryContext) {
        List<Predicate> predicates = new ArrayList<>();

        if (this.like != null && !this.like.isBlank()) {
            Predicate likePredicate = queryContext.CriteriaBuilder.or(
                    queryContext.CriteriaBuilder.like(queryContext.Root.get(AnnotationEntity._payload), this.like)
            );
            predicates.add(likePredicate);
        }
        if (this.ids != null) {
            CriteriaBuilder.In<UUID> inClause = queryContext.CriteriaBuilder.in(queryContext.Root.get(AnnotationEntity._id));
            for (UUID item : this.ids)
                inClause.value(item);
            predicates.add(inClause);
        }
        if (this.excludedIds != null) {
            CriteriaBuilder.In<UUID> inClause = queryContext.CriteriaBuilder.in(queryContext.Root.get(AnnotationEntity._id));
            for (UUID item : this.ids)
                inClause.value(item);
            predicates.add(inClause.not());
        }
        if (this.isActives != null) {
            CriteriaBuilder.In<IsActive> inClause = queryContext.CriteriaBuilder.in(queryContext.Root.get(AnnotationEntity._isActive));
            for (IsActive item : this.isActives)
                inClause.value(item);
            predicates.add(inClause);
        }
        if (this.entityIds != null) {
            CriteriaBuilder.In<UUID> inClause = queryContext.CriteriaBuilder.in(queryContext.Root.get(AnnotationEntity._entityId));
            for (UUID item : this.entityIds)
                inClause.value(item);
            predicates.add(inClause);
        }
        if (this.entityTypes != null) {
            CriteriaBuilder.In<String> inClause = queryContext.CriteriaBuilder.in(queryContext.Root.get(AnnotationEntity._entityType));
            for (String item : this.entityTypes)
                inClause.value(item);
            predicates.add(inClause);
        }
        if (this.anchors != null) {
            CriteriaBuilder.In<String> inClause = queryContext.CriteriaBuilder.in(queryContext.Root.get(AnnotationEntity._anchor));
            for (String item : this.anchors)
                inClause.value(item);
            predicates.add(inClause);
        }
        if (this.threadIds != null) {
            CriteriaBuilder.In<UUID> inClause = queryContext.CriteriaBuilder.in(queryContext.Root.get(AnnotationEntity._threadId));
            for (UUID item : this.threadIds)
                inClause.value(item);
            predicates.add(inClause);
        }

        if (!predicates.isEmpty()) {
            Predicate[] predicatesArray = predicates.toArray(new Predicate[0]);
            return queryContext.CriteriaBuilder.and(predicatesArray);
        } else {
            return null;
        }
    }

    @Override
    protected String fieldNameOf(FieldResolver item) {
        if (item.match(Annotation._id))
            return AnnotationEntity._id;
        else if (item.match(Annotation._entityId))
            return AnnotationEntity._entityId;
        else if (item.match(Annotation._entityType))
            return AnnotationEntity._entityType;
        else if (item.match(Annotation._anchor))
            return AnnotationEntity._anchor;
        else if (item.match(Annotation._payload))
            return AnnotationEntity._payload;
        else if (item.match(Annotation._subjectId))
            return AnnotationEntity._subjectId;
        else if (item.match(Annotation._threadId))
            return AnnotationEntity._threadId;
        else if (item.match(Annotation._parentId))
            return AnnotationEntity._parentId;
        else if (item.match(Annotation._protectionType))
            return AnnotationEntity._protectionType;
        else if (item.match(Annotation._timeStamp))
            return AnnotationEntity._timeStamp;
        else if (item.match(Annotation._createdAt))
            return AnnotationEntity._createdAt;
        else if (item.match(Annotation._updatedAt))
            return AnnotationEntity._updatedAt;
//        else if (item.match(Annotation._hash)) return AnnotationEntity._updatedAt;
        else if (item.match(Annotation._isActive))
            return AnnotationEntity._isActive;
        else
            return null;
    }

    @Override
    protected AnnotationEntity convert(Tuple tuple, Set<String> columns) {
        AnnotationEntity item = new AnnotationEntity();
        item.setId(QueryBase.convertSafe(tuple, columns, AnnotationEntity._id, UUID.class));
        item.setEntityId(QueryBase.convertSafe(tuple, columns, AnnotationEntity._entityId, UUID.class));
        item.setEntityType(QueryBase.convertSafe(tuple, columns, AnnotationEntity._entityType, String.class));
        item.setAnchor(QueryBase.convertSafe(tuple, columns, AnnotationEntity._anchor, String.class));
        item.setPayload(QueryBase.convertSafe(tuple, columns, AnnotationEntity._payload, String.class));
        item.setSubjectId(QueryBase.convertSafe(tuple, columns, AnnotationEntity._subjectId, UUID.class));
        item.setThreadId(QueryBase.convertSafe(tuple, columns, AnnotationEntity._threadId, UUID.class));
        item.setParentId(QueryBase.convertSafe(tuple, columns, AnnotationEntity._parentId, UUID.class));
        item.setProtectionType(QueryBase.convertSafe(tuple, columns, AnnotationEntity._protectionType, AnnotationProtectionType.class));
        item.setTimeStamp(QueryBase.convertSafe(tuple, columns, AnnotationEntity._timeStamp, Instant.class));
        item.setCreatedAt(QueryBase.convertSafe(tuple, columns, AnnotationEntity._createdAt, Instant.class));
        item.setUpdatedAt(QueryBase.convertSafe(tuple, columns, AnnotationEntity._updatedAt, Instant.class));
        item.setIsActive(QueryBase.convertSafe(tuple, columns, AnnotationEntity._isActive, IsActive.class));
        return item;
    }

}