#!/bin/bash -e

DMENU=dmenu
SUDO=pkexec
if tty -s; then
    DMENU=fzf
    SUDO=sudo
fi

if [ "$EUID" = 0 ]; then
    SUDO=
fi

d="$(mktemp -d)"
# shellcheck disable=SC2064
trap "rm -rf '$d'" EXIT
touch "$d/"{1..2}

CMD=()
while read -r i; do
    CMD+=("wg-quick down '$i'")
done < <(ip -br link show type wireguard | awk '{print $1}')

if [ "$1" != off ]; then
    CMD=(
        "basename -s.conf '/etc/wireguard/$1'*.conf > '$d/1'"
        "inotifywait -e close_write '$d/2'"
        "up=\"\$(cat '$d/2')\""
        "[ -z \"\$up\" ] && exit"
        "${CMD[@]}"
        "wg-quick up \"\$up\""
    )
fi

(inotifywait -e close_write "$d/1"; "$DMENU" < "$d/1" > "$d/2") &
$SUDO bash -c "${CMD[*]/%/;}"

touch "${XDG_RUNTIME_DIR:-/run/user/1000}/sbar/vpn"