package com.magamochi.model.specification;

import static java.util.Objects.nonNull;

import com.magamochi.content.model.dto.MangaImportJobFilterDTO;
import com.magamochi.content.model.entity.MangaImportJob;
import jakarta.persistence.criteria.Predicate;
import java.util.ArrayList;
import java.util.List;
import lombok.AccessLevel;
import lombok.NoArgsConstructor;
import org.apache.commons.lang3.StringUtils;
import org.springframework.data.jpa.domain.Specification;

@NoArgsConstructor(access = AccessLevel.PRIVATE)
public class MangaImportJobSpecification {

  public static Specification<MangaImportJob> build(MangaImportJobFilterDTO filter) {
    return (root, query, cb) -> {
      List<Predicate> predicates = new ArrayList<>();

      if (StringUtils.isNotBlank(filter.searchQuery())) {
        var searchTerm = filter.searchQuery().trim();
        var searchPattern = "%" + searchTerm.toLowerCase() + "%";

        var filenamePredicate = cb.like(cb.lower(root.get("originalFilename")), searchPattern);

        List<Predicate> orPredicates = new ArrayList<>();
        orPredicates.add(filenamePredicate);

        try {
          var numericValue = Long.parseLong(searchTerm);
          orPredicates.add(cb.equal(root.get("id"), numericValue));
          orPredicates.add(cb.equal(root.get("malId"), numericValue));
          orPredicates.add(cb.equal(root.get("aniListId"), numericValue));
        } catch (NumberFormatException ignored) {
          // not a numeric value, skip ID predicates
        }

        predicates.add(cb.or(orPredicates.toArray(Predicate[]::new)));
      }

      if (nonNull(filter.status())) {
        predicates.add(cb.equal(root.get("status"), filter.status()));
      }

      return cb.and(predicates.toArray(Predicate[]::new));
    };
  }
}