#!/bin/sh

modprobe wireguard || { echo "Error: Failed to load wireguard module." >&2; exit 1; }
ip link add dev wg0 type wireguard || { echo "Error: Failed to create wg0 interface." >&2; exit 1; }

( echo "#"
  echo "[Interface]"
  echo "PrivateKey = $(fw_printenv -n wg_privkey)"
  # echo "Address = $(fw_printenv -n wg_address)"
  # echo "DNS = $(fw_printenv -n wg_dns)"
  echo
  echo "[Peer]"
  echo "Endpoint = $(fw_printenv -n wg_endpoint)"
  echo "PersistentKeepalive = $(fw_printenv -n wg_alive)"
  echo "PublicKey = $(fw_printenv -n wg_pubkey)"
  echo "PresharedKey = $(fw_printenv -n wg_sharkey)"
  echo "AllowedIPs = $(fw_printenv -n wg_allowed)"
  echo "#"
) >>/tmp/wireguard.conf

wg setconf wg0 /tmp/wireguard.conf
wg_address="$(fw_printenv -n wg_address)"
if [ -z "$wg_address" ]; then
    echo "Error: wg_address environment variable is not set or empty." >&2
    exit 1
fi
ip address add dev wg0 "$wg_address"
ip link set up dev wg0