package eu.eudat.query;

import eu.eudat.authorization.AuthorizationFlags;
import eu.eudat.authorization.Permission;
import eu.eudat.commons.enums.DmpUserRole;
import eu.eudat.commons.enums.IsActive;
import eu.eudat.commons.scope.user.UserScope;
import eu.eudat.data.*;
import eu.eudat.model.DmpUser;
import eu.eudat.model.PublicDmpUser;
import eu.eudat.query.utils.BuildSubQueryInput;
import eu.eudat.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 DmpUserQuery extends QueryBase<DmpUserEntity> {

    private Collection<UUID> ids;

    private Collection<IsActive> isActives;

    private Collection<UUID> dmpIds;

    private Collection<UUID> descriptionIds;

    private Collection<UUID> userIds;

    private Collection<DmpUserRole> userRoles;

    private Collection<UUID> sectionIds;
    private Boolean sectionIsEmpty;

    private EnumSet<AuthorizationFlags> authorize = EnumSet.of(AuthorizationFlags.None);
    
    public DmpUserQuery ids(UUID value) {
        this.ids = List.of(value);
        return this;
    }

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

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

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

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

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

    public DmpUserQuery dmpIds(UUID value) {
        this.dmpIds = List.of(value);
        return this;
    }

    public DmpUserQuery dmpIds(UUID... value) {
        this.dmpIds = Arrays.asList(value);
        return this;
    }

    public DmpUserQuery dmpIds(Collection<UUID> values) {
        this.dmpIds = values;
        return this;
    }

    public DmpUserQuery descriptionIds(UUID value) {
        this.descriptionIds = List.of(value);
        return this;
    }

    public DmpUserQuery descriptionIds(UUID... value) {
        this.descriptionIds = Arrays.asList(value);
        return this;
    }

    public DmpUserQuery descriptionIds(Collection<UUID> values) {
        this.descriptionIds = values;
        return this;
    }

    public DmpUserQuery userRoles(DmpUserRole value) {
        this.userRoles = List.of(value);
        return this;
    }

    public DmpUserQuery userRoles(DmpUserRole... value) {
        this.userRoles = Arrays.asList(value);
        return this;
    }

    public DmpUserQuery userRoles(Collection<DmpUserRole> values) {
        this.userRoles = values;
        return this;
    }

    public DmpUserQuery userIds(UUID value) {
        this.userIds = List.of(value);
        return this;
    }

    public DmpUserQuery userIds(UUID... value) {
        this.userIds = Arrays.asList(value);
        return this;
    }

    public DmpUserQuery userIds(Collection<UUID> values) {
        this.userIds = values;
        return this;
    }

    public DmpUserQuery sectionIds(UUID value) {
        this.sectionIds = List.of(value);
        return this;
    }

    public DmpUserQuery sectionIds(UUID... value) {
        this.sectionIds = Arrays.asList(value);
        return this;
    }

    public DmpUserQuery sectionIds(Collection<UUID> values) {
        this.sectionIds = values;
        return this;
    }
    
    public DmpUserQuery sectionIsEmpty(Boolean sectionIsEmpty) {
        this.sectionIsEmpty = sectionIsEmpty;
        return this;
    }

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

    private final UserScope userScope;

    private final AuthorizationService authService;

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

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

    @Override
    protected Boolean isFalseQuery() {
        return this.isEmpty(this.ids) || this.isEmpty(this.dmpIds) || this.isEmpty(this.descriptionIds) || this.isEmpty(this.userIds);
    }

    @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.BrowseDmp)) return null;
        UUID userId = null;
        boolean usePublic = this.authorize.contains(AuthorizationFlags.Public);
        if (this.authorize.contains(AuthorizationFlags.DmpAssociated)) userId = this.userScope.getUserIdSafe();

        List<Predicate> predicates = new ArrayList<>();
        if (userId != null || usePublic ) {
            predicates.add(queryContext.CriteriaBuilder.or(
                    usePublic ? queryContext.CriteriaBuilder.in(queryContext.Root.get(DmpUserEntity._dmpId)).value(queryUtilsService.buildPublicDmpAuthZSubQuery(queryContext.Query, queryContext.CriteriaBuilder, usePublic)) : queryContext.CriteriaBuilder.or(),  //Creates a false query
                    userId != null ?  queryContext.CriteriaBuilder.in(queryContext.Root.get(DmpUserEntity._dmpId)).value(queryUtilsService.buildDmpUserAuthZSubQuery(queryContext.Query, queryContext.CriteriaBuilder, userId)) : queryContext.CriteriaBuilder.or()  //Creates a false query
            ));
        }
        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.ids != null) {
            CriteriaBuilder.In<UUID> inClause = queryContext.CriteriaBuilder.in(queryContext.Root.get(DmpUserEntity._id));
            for (UUID item : this.ids)
                inClause.value(item);
            predicates.add(inClause);
        }
        if (this.isActives != null) {
            CriteriaBuilder.In<IsActive> inClause = queryContext.CriteriaBuilder.in(queryContext.Root.get(DmpUserEntity._isActive));
            for (IsActive item : this.isActives)
                inClause.value(item);
            predicates.add(inClause);
        }
        if (this.dmpIds != null) {
            CriteriaBuilder.In<UUID> inClause = queryContext.CriteriaBuilder.in(queryContext.Root.get(DmpUserEntity._dmpId));
            for (UUID item : this.dmpIds)
                inClause.value(item);
            predicates.add(inClause);
        }
        if (this.sectionIsEmpty != null){
            if(this.sectionIsEmpty) predicates.add(queryContext.CriteriaBuilder.isNull(queryContext.Root.get(DmpUserEntity._sectionId)));
            else predicates.add(queryContext.CriteriaBuilder.isNotNull(queryContext.Root.get(DmpUserEntity._sectionId)));
        }
        if (this.descriptionIds != null) {
            Subquery<UUID> descriptionSubquery = queryUtilsService.buildSubQuery(new BuildSubQueryInput<>(
                    new BuildSubQueryInput.Builder<>(DescriptionEntity.class, UUID.class, queryContext)
                            .keyPathFunc((subQueryRoot) -> subQueryRoot.get(DescriptionEntity._dmpId))
                            .filterFunc((subQueryRoot, cb) ->  {
                                CriteriaBuilder.In<UUID> inClause = cb.in(subQueryRoot.get(DmpUserEntity._id));
                                for (UUID item : this.descriptionIds)
                                    inClause.value(item);
                                return inClause;
                            })
            ));
            predicates.add(queryContext.CriteriaBuilder.in(queryContext.Root.get(DmpUserEntity._dmpId)).value(descriptionSubquery));
        }
        if (this.userIds != null) {
            CriteriaBuilder.In<UUID> inClause = queryContext.CriteriaBuilder.in(queryContext.Root.get(DmpUserEntity._userId));
            for (UUID item : this.userIds)
                inClause.value(item);
            predicates.add(inClause);
        }
        if (this.sectionIds != null) {
            CriteriaBuilder.In<UUID> inClause = queryContext.CriteriaBuilder.in(queryContext.Root.get(DmpUserEntity._sectionId));
            for (UUID item : this.sectionIds)
                inClause.value(item);
            predicates.add(inClause);
        }
        if (this.userRoles != null) {
            CriteriaBuilder.In<DmpUserRole> inClause = queryContext.CriteriaBuilder.in(queryContext.Root.get(DmpUserEntity._role));
            for (DmpUserRole item : this.userRoles)
                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 DmpUserEntity convert(Tuple tuple, Set<String> columns) {
        DmpUserEntity item = new DmpUserEntity();
        item.setId(QueryBase.convertSafe(tuple, columns, DmpUserEntity._id, UUID.class));
        item.setDmpId(QueryBase.convertSafe(tuple, columns, DmpUserEntity._dmpId, UUID.class));
        item.setUserId(QueryBase.convertSafe(tuple, columns, DmpUserEntity._userId, UUID.class));
        item.setSectionId(QueryBase.convertSafe(tuple, columns, DmpUserEntity._sectionId, UUID.class));
        item.setRole(QueryBase.convertSafe(tuple, columns, DmpUserEntity._role, DmpUserRole.class));
        item.setCreatedAt(QueryBase.convertSafe(tuple, columns, DmpUserEntity._createdAt, Instant.class));
        item.setUpdatedAt(QueryBase.convertSafe(tuple, columns, DmpUserEntity._updatedAt, Instant.class));
        item.setIsActive(QueryBase.convertSafe(tuple, columns, DmpUserEntity._isActive, IsActive.class));
        return item;
    }

    @Override
    protected String fieldNameOf(FieldResolver item) {
        if (item.match(DmpUser._id) || item.match(PublicDmpUser._id)) return DmpUserEntity._id;
        else if (item.prefix(DmpUser._dmp) || item.prefix(PublicDmpUser._dmp)) return DmpUserEntity._dmpId;
        else if (item.prefix(DmpUser._user) || item.prefix(PublicDmpUser._user)) return DmpUserEntity._userId;
        else if (item.match(DmpUser._role) || item.match(PublicDmpUser._role)) return DmpUserEntity._role;
        else if (item.match(DmpUser._sectionId)) return DmpUserEntity._sectionId;
        else if (item.match(DmpUser._createdAt)) return DmpUserEntity._createdAt;
        else if (item.match(DmpUser._updatedAt)) return DmpUserEntity._updatedAt;
        else if (item.match(DmpUser._isActive)) return DmpUserEntity._isActive;
        else if (item.match(DmpUser._hash)) return DmpUserEntity._updatedAt;
        else if (item.match(DmpUser._dmp)) return DmpUserEntity._dmpId;
        else if (item.match(DmpUser._user)) return DmpUserEntity._userId;
        else return null;
    }
    
}