username="$1"
pubkey_path="$2"
slbr_port="1337"
info_port="1338"
log_port="1339"
user_sshd_port="5000"
container_id=""
container_ip=""
host_ip=""

[ -z "$1" ] && echo "please provide a username." && exit
[ -z "$2" ] && echo "please provide a pubkey file." && exit

get_user_sshd_port() {
    listening_ports="$(ss -tuln \
        | awk '{print $5}' \
        | rev \
        | cut -f1 -d ":" \
        | rev 
    )"
    if echo "$listening_ports" | grep -q "$user_sshd_port"
    then
        user_sshd_port="$(( user_sshd_port + 1 ))"
        get_user_sshd_port
    else
        echo "$user_sshd_port"
    fi

}
get_user_sshd_port

cp "$pubkey_path" image/pubkey
host_ip="$(
    ip -br -4 addr \
    | grep eth0 \
    | awk '{print $3}' \
    | cut -f 1 -d '/'
)"

docker build \
    -t slbr:$username \
    --build-arg USERNAME=$username \
    --build-arg HOST_IP=$host_ip \
    --build-arg SLBR_PORT=$slbr_port \
    --build-arg INFO_PORT=$info_port \
    --build-arg LOG_PORT=$log_port \
    --build-arg SSHD_PORT=$user_sshd_port \
    --label description="SLBR User Container" \
    ./image 

rm image/pubkey
echo "Starting container..."
container_id="$(docker run -p $user_sshd_port:$user_sshd_port -h slbr -d "slbr:$username")"
container_ip="$(
    docker container inspect "$container_id" \
    | jq '.[0].NetworkSettings.Networks.bridge.IPAddress'
)"
echo "Done!"
echo "connect using: ssh $username@$host_ip -p $user_sshd_port"