package seed

import (
	"context"
	"errors"
	"log"

	"github.com/jackc/pgx/v5/pgconn"

	"booklib/internal/auth"
	"booklib/internal/store"
)

func Admin(ctx context.Context, s *store.Store, user, pass string) error {
	if user == "" || pass == "" {
		return nil
	}
	if len(pass) < 8 { // 与 API 建户口令下限一致
		log.Printf("seed admin skipped: ADMIN_PASSWORD must be >= 8 chars")
		return nil
	}
	n, err := s.CountUsers(ctx)
	if err != nil || n > 0 {
		return err
	}
	h, err := auth.HashPassword(pass)
	if err != nil {
		return err
	}
	if _, err := s.CreateUser(ctx, user, h, "admin"); err != nil {
		var pgErr *pgconn.PgError
		if errors.As(err, &pgErr) && pgErr.Code == "23505" {
			log.Printf("seed admin %q may already exist: %v", user, err)
			return nil
		}
		return err
	}
	log.Printf("seeded initial admin user %q", user)
	return nil
}