import ipaddress

import dns.name


class FilterModule:
    def filters(self):
        return {
            "add_origin": add_origin,
            "add_origin_keys": add_origin_keys,
            "ip_filter": ip_filter,
        }


def ip_filter(addresses, networks):
    if isinstance(addresses, dict):
        return {k: ip_filter(v, networks) for k, v in addresses.items()}
    ip_networks = [ipaddress.ip_network(n) for n in networks]
    ip_addresses = [ipaddress.ip_address(a) for a in addresses]
    return [str(a) for a in ip_addresses if any(a in n for n in ip_networks)]


def add_origin(name, origin="."):
    return dns.name.from_text(name, dns.name.from_text(origin)).to_text()


def add_origin_keys(dct, origin="."):
    return {add_origin(k, origin): v for k, v in dct.items()}