import { NextResponse, type NextRequest } from "next/server";

import { parsePaging, type ItemList } from "@/lib/db";

import {

  getCalendarEvents,

  getCalendarDaySummary,

  type CalendarEvent,

  type CalendarDayKind,

} from "@/lib/feed";

export const dynamic = "force-dynamic";

export async function GET(req: NextRequest) {

  const sp = req.nextUrl.searchParams;

  const from = sp.get("from") || undefined;

  const to = sp.get("to") || undefined;

  const kind = sp.get("kind") || undefined;

  if (sp.get("summary")) {

    const items = getCalendarDaySummary(from ?? "", to ?? "");

    const body: ItemList<CalendarDayKind> = {

      items,

      total: items.length,

      limit: items.length,

      offset: 0,

    };

    return NextResponse.json(body);

  }

  const { limit, offset } = parsePaging(sp);

  const items = getCalendarEvents({ from, to, kind });

  const total = items.length;

  const paged = items.slice(offset, offset + limit);

  const body: ItemList<CalendarEvent> = { items: paged, total, limit, offset };

  return NextResponse.json(body);

}