package com.mydreamjob.job;

import jakarta.persistence.criteria.Predicate;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
import org.springframework.data.jpa.domain.Specification;

/** 企业私有岗位列表查询；租户条件始终是必选条件。 */
public final class CompanyJobManagementSpecification {
    private CompanyJobManagementSpecification() {}

    public static Specification<Job> forCompany(long companyId, String status, String keyword, String city) {
        return (root, query, cb) -> {
            List<Predicate> predicates = new ArrayList<>();
            predicates.add(cb.equal(root.get("companyId"), companyId));
            if (status != null) predicates.add(cb.equal(root.get("status"), status));
            if (keyword != null) {
                // LOCATE treats % and _ literally and is supported by both H2 and MySQL.
                predicates.add(cb.greaterThan(cb.locate(
                        cb.lower(root.get("title")), keyword.toLowerCase(Locale.ROOT)), 0));
            }
            if (city != null) {
                predicates.add(cb.equal(cb.lower(root.get("city")), city.toLowerCase(Locale.ROOT)));
            }
            return cb.and(predicates.toArray(Predicate[]::new));
        };
    }

}