#!/bin/sh

test -f /tmp/started || exit

make_config() {
# remove old config
>/etc/config/tunneldigger
rm /tmp/fastd_fff_peers/*
count=0
# get fastd peers
filecounts=$(awk '/^####/ { gsub(/^####/, "", $0); gsub(/.conf/, "", $0); print $0; }' /tmp/fastd_fff_output)
for file in $filecounts; do
    awk "{ if(a) print }; /^####$file.conf$/{a=1}; /^$/{a=0};" /tmp/fastd_fff_output | sed 's/ float;/;/g' > /etc/fastd/fff/peers/$file
    echo 'float yes;' >> /etc/fastd/fff/peers/$file

    # ask for Broker and select the tunnel
    IP=$(awk -F\" '/remote/ {print $2}' /etc/fastd/fff/peers/$file)
    if [ "l2tp" = "$(wget -T10 $IP/vpn.txt -O - 2>/dev/null)" ]; then
        # Gateway offers l2tp
        FDPORT=$(awk '/remote/{gsub(";", ""); print $5}' /etc/fastd/fff/peers/$file)
        L2PORT=$((FDPORT + 10000))
        UUID=$hostname

        uci set tunneldigger.$count=broker
        uci set tunneldigger.$count.address="$IP:$L2PORT"
        uci set tunneldigger.$count.uuid="$UUID"
        uci set tunneldigger.$count.interface="l2tp$count"
        uci set tunneldigger.$count.enabled="1"
        uci set tunneldigger.$count.hook_script='/etc/tunneldigger/tunneldigger.hook'
        uci -c /tmp commit tunneldigger
        count=$((count + 1))
        # remove this fastd-peer
        rm /etc/fastd/fff/peers/$file
    fi
done
}

# main

# Only do something when file is here and greater 0 byte
if [ -s /tmp/fastd_fff_output ]; then

    # set some vars
    hostname=$(cat /proc/sys/kernel/hostname)
    mac=$(awk '{ mac=toupper($1); gsub(":", "", mac); print mac }' /sys/class/net/br-mesh/address 2>/dev/null)
    [ "$hostname" = "OpenWrt" ] && hostname=""
    [ "$hostname" = "" ] &&  hostname="$mac"

    if [ ! -d /tmp/fastd_fff_peers ]; then
        # first run after reboot
        mkdir /tmp/fastd_fff_peers
        make_config
        # start fastd only if there are some peers left
        [ "$(ls /etc/fastd/fff/peers/* 2>/dev/null)" ] && /etc/init.d/fastd start
        /etc/init.d/tunneldigger start
    else
        # check if new tunneldigger conf is different
        sumold=$(sha256sum /etc/config/tunneldigger)
        make_config
        sumnew=$(sha256sum /etc/config/tunneldigger)
        [ "$sumnew" != "$sumold" ] && /etc/init.d/tunneldigger restart
        /etc/init.d/fastd reload

        # fastd start/stop for various situations
        pidfile="/tmp/run/fastd.fff.pid"
        if [ "$(ls /etc/fastd/fff/peers/* 2>/dev/null)" ]; then
            ([ -s "$pidfile" ] && [ -d "/proc/$(cat "$pidfile")" ]) || /etc/init.d/fastd start
        else
            ([ -s "$pidfile" ] && [ -d "/proc/$(cat "$pidfile")" ]) && /etc/init.d/fastd stop
        fi

    fi
fi