import { NextResponse, type NextRequest } from "next/server";
import { reversePlace, searchPlaces } from "@/lib/weather/geocode";
import { badRequest, errorResponse, forbidCrossSite, parseCoords } from "@/lib/weather/respond";

/**
 * GET /api/geocode?q=Burnsville        → Place[]   (search by name)
 * GET /api/geocode?lat=44.7&lon=-93.2  → Place     (name for coordinates)
 */
export async function GET(request: NextRequest) {
  const blocked = forbidCrossSite(request);
  if (blocked) return blocked;

  const params = request.nextUrl.searchParams;
  const query = params.get("q")?.trim();

  try {
    if (query) {
      if (query.length < 2) return NextResponse.json([]);
      return NextResponse.json(await searchPlaces(query));
    }

    const coords = parseCoords(params);
    if (!coords) return badRequest("Pass either q, or lat and lon");
    return NextResponse.json(await reversePlace(coords.lat, coords.lon));
  } catch (error) {
    return errorResponse(error);
  }
}