import type { Metadata } from 'next';
import Link from 'next/link';
import { Alert } from '@/components/ui/alert';
import { Pagination } from '@/components/ui/pagination';
import { verifySession } from '@/lib/auth/dal';
import { fetchStudentMembers } from '@/lib/data/repositories/student-member-repository';
import { buildStudentMemberHref, parseStudentMemberQuery } from '@/lib/domain/student-member-query';
import { StudentListToolbar } from './_components/student-list-toolbar';
import { StudentSearchBar } from './_components/student-search-bar';
import { StudentTable } from './_components/student-table';

export const metadata: Metadata = {
  title: '학생 회원',
};

interface PageProps {
  searchParams: Promise<Record<string, string | string[] | undefined>>;
}

export default async function Page({ searchParams }: PageProps) {
  await verifySession();

  const query = parseStudentMemberQuery(await searchParams);
  const { items, totalCount } = await fetchStudentMembers(query);
  const totalPages = Math.max(1, Math.ceil(totalCount / query.pageSize));
  const currentPage = Math.min(query.page, totalPages);

  return (
    <section className="flex flex-1 flex-col gap-6 p-8">
      <h1 className="text-headline-sm text-foreground">학생 회원 목록</h1>

      <StudentSearchBar query={query} />

      <StudentListToolbar query={query} />

      <p className="text-body-md text-foreground-muted">
        총 {totalCount}명 | 현재페이지 {currentPage}/{totalPages}
      </p>

      {items.length === 0 ? (
        <Alert
          title="검색 결과가 없습니다."
          actions={
            <Link
              href={buildStudentMemberHref(query, { keyword: '', page: 1 })}
              className="bg-foreground px-4 py-2 text-background"
            >
              확인
            </Link>
          }
        >
          다른 검색어로 다시 시도해 주세요.
        </Alert>
      ) : (
        <>
          <StudentTable items={items} page={query.page} pageSize={query.pageSize} />
          <Pagination
            currentPage={currentPage}
            totalPages={totalPages}
            buildHref={(page: number) => buildStudentMemberHref(query, { page })}
          />
        </>
      )}
    </section>
  );
}