#!/bin/sh
set -efux
expected_max_results=1024 # the upper bound on the number of restaurants
radius=250

echo '[out:json];node(id:260050809)->.cbase;
(
  node(around.cbase:'$radius')[amenity=fast_food];
  node(around.cbase:'$radius')[amenity=restaurant];
);out;' \
  | curl -sSL -d @- -X POST http://overpass-api.de/api/interpreter \
  | jq --argjson random "$(shuf -i 0-$expected_max_results -n 1)" '
    .elements
    | length as $length
    | .[$random % $length]
  '