import { withApi } from "@/lib/api";
import { getUpcomingEpisodes } from "@/lib/stats";

/**
 * GET /api/v1/kalender?von=2026-09-01&bis=2026-09-30
 *
 * Kommende Episoden der getrackten Serien. Ohne Angabe: die nächsten 30 Tage.
 */
export const GET = withApi(async (request, user) => {
  const url = new URL(request.url);

  const parse = (value: string | null, fallback: Date) => {
    if (!value) return fallback;
    const date = new Date(value);
    return Number.isNaN(date.getTime()) ? fallback : date;
  };

  const from = parse(url.searchParams.get("von"), new Date());
  const to = parse(url.searchParams.get("bis"), new Date(Date.now() + 30 * 86_400_000));

  const episodes = await getUpcomingEpisodes(user.id, from, to);

  return {
    from: from.toISOString(),
    to: to.toISOString(),
    total: episodes.length,
    items: episodes,
  };
});