#!/usr/bin/env nix-shell
#! nix-shell -i bash -p curl jq

set -euo pipefail

script_dir=$(cd -- "$(dirname -- "${BASH_SOURCE[0]}")" &> /dev/null && pwd)
output_file="$script_dir/mullvad-servers-list.nix"

servers_json=$(curl -Ss 'https://api.mullvad.net/www/relays/all')

readarray -t servers_arr < <(jq -c '.[] | select(.type == "wireguard")' <<< $servers_json)

printf '# @generated by generate-mullvad-peer-list.sh\n# Do not Edit.\n\n' > $output_file
printf '[\n' >> $output_file

for item in "${servers_arr[@]}"; do
    hostname=$(jq -r '.hostname' <<< $item)
    pubkey=$(jq -r '.pubkey' <<< $item)
    endpoint=$(jq -r '.ipv4_addr_in' <<< $item)
    cat <<EOF >> $output_file
  {
    id = "$hostname";
    uuid = "$(uuidgen -n @url --sha1 --name "$hostname-$endpoint")";
    pubKey = "$pubkey";
    endpoint = "$endpoint";
  }
EOF
done

printf ']' >> $output_file