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

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

import { getFeedItems, type FeedItem } from "@/lib/feed";

export const dynamic = "force-dynamic";

export async function GET(req: NextRequest) {

  const sp = req.nextUrl.searchParams;

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

  const types = paramArray(sp, "type");

  const state = sp.get("state")?.toUpperCase();

  const q = sp.get("q")?.toLowerCase().trim();

  let items = getFeedItems();

  if (types.length) {

    const allow = new Set(types);

    items = items.filter((i) => allow.has(i.kind));

  }

  if (state && state !== "US") {

    items = items.filter((i) => i.jurisdiction === state);

  }

  if (q) {

    items = items.filter(

      (i) =>

        i.title.toLowerCase().includes(q) ||

        (i.summary ?? "").toLowerCase().includes(q) ||

        i.actionType.toLowerCase().includes(q)

    );

  }

  const total = items.length;

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

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

  return NextResponse.json(body);

}