package admin

import (
	"context"
	"errors"

	"github.com/google/uuid"
	"github.com/jackc/pgx/v5"

	"github.com/yuxingu/digital-psychology/apps/api/internal/repository"
)

var ErrFilterRuleNotFound = errString("filter rule not found")

// ListFilterRules returns FilterRule catalog.
func (s *Service) ListFilterRules(ctx context.Context) ([]repository.FilterRuleRow, error) {
	items, err := s.Repo.ListFilterRules(ctx)
	if err != nil {
		return nil, err
	}
	if items == nil {
		items = []repository.FilterRuleRow{}
	}
	return items, nil
}

// GetFilterRule loads one rule.
func (s *Service) GetFilterRule(ctx context.Context, id uuid.UUID) (*repository.FilterRuleRow, error) {
	row, err := s.Repo.GetFilterRule(ctx, id)
	if errors.Is(err, pgx.ErrNoRows) {
		return nil, ErrFilterRuleNotFound
	}
	return row, err
}

// EvaluateContent runs read-only filter preview.
func (s *Service) EvaluateContent(ctx context.Context, text string) ([]repository.FilterMatch, error) {
	return s.Repo.EvaluateFilterRules(ctx, text)
}