#!/bin/bash
set -eu
[ -n "${DEBUG:-}" ] && set -x

update() {
	local ts_acct ts_ip
	local class text alt

	if tailscale status | grep -q stopped; then
		return 1
	fi

	ts_ip=$(tailscale ip -1 || return 1)
	ts_acct=$(tailscale switch --list 2>/dev/null | awk '/\*$/{ print gensub(/^.* ([^ ]+)\*$/, "\\1", "1") }')

	alt="$ts_acct"
	class="$ts_acct"
	tip="$ts_ip"
	# only display account name when not "main"
	[ "$ts_acct" = "main" ] || text=$ts_acct

	en_name=$(tailscale exit-node list | grep selected)
	if test -n "$en_name"; then
		alt="exit-node"
		class="exit-node"
		tip="$(awk '{printf "%s (%s)", $2, $1}' <<<"$en_name")"
	fi

	jq -nrc '{text:$text,tooltip:$tip,class:$class,alt:$alt}' \
		--arg tip "${tip:?}" \
		--arg class "${class:?}" \
		--arg alt "${alt:?}" \
		--arg text "${text:-}"
}

update || echo '{}'