import socket
from ipaddress import IPv4Network

from vpp_object import VppObject
from vpp_papi import VppEnum


def get_if_dump(dump, sw_if_index):
    for d in dump:
        if (d.sw_if_index == sw_if_index):
            return d


def query_all_memif_vpp_config(_test):
    return _test.vapi.memif_dump()


def remove_all_memif_vpp_config(_test):
    dump = _test.vapi.memif_dump()
    for d in dump:
        _test.vapi.memif_delete(d.sw_if_index)
    dump = _test.vapi.memif_socket_filename_dump()
    for d in dump:
        if d.socket_id != 0:
            _test.vapi.memif_socket_filename_add_del(
                0, d.socket_id, d.socket_filename)


class VppSocketFilename(VppObject):
    def __init__(self, test, socket_id, socket_filename,
                 add_default_folder=False):
        self._test = test
        self.socket_id = socket_id
        self.socket_filename = socket_filename

        # if True insert default socket folder before socket filename,
        # after adding vpp config
        self.add_default_folder = add_default_folder

    def add_vpp_config(self):
        rv = self._test.vapi.memif_socket_filename_add_del(
            1, self.socket_id, self.socket_filename)
        if self.add_default_folder:
            self.socket_filename = "%s/%s" % (self._test.tempdir,
                                              self.socket_filename)
        return rv

    def remove_vpp_config(self):
        return self._test.vapi.memif_socket_filename_add_del(
            0, self.socket_id, self.socket_filename)

    def query_vpp_config(self):
        return self._test.vapi.memif_socket_filename_dump()

    def object_id(self):
        return "socket-filename-%d-%s" % (self.socket_id, self.socket_filename)


class VppMemif(VppObject):
    def __init__(self, test, role, mode, rx_queues=0, tx_queues=0, if_id=0,
                 socket_id=0, secret="", ring_size=0, buffer_size=0,
                 hw_addr=""):
        self._test = test
        self.role = role
        self.mode = mode
        self.rx_queues = rx_queues
        self.tx_queues = tx_queues
        self.if_id = if_id
        self.socket_id = socket_id
        self.secret = secret
        self.ring_size = ring_size
        self.buffer_size = buffer_size
        self.hw_addr = hw_addr
        self.sw_if_index = None
        self.ip_prefix = IPv4Network("192.168.%d.%d/24" %
                                     (self.if_id + 1, self.role + 1),
                                     strict=False)

    def add_vpp_config(self):
        rv = self._test.vapi.memif_create(
            role=self.role,
            mode=self.mode,
            rx_queues=self.rx_queues,
            tx_queues=self.tx_queues,
            id=self.if_id,
            socket_id=self.socket_id,
            secret=self.secret,
            ring_size=self.ring_size,
            buffer_size=self.buffer_size,
            hw_addr=self.hw_addr)
        try:
            self.sw_if_index = rv.sw_if_index
        except AttributeError:
            # rv doesn't have .sw_if_index attribute
            raise AttributeError("%s %s" % (self, rv))

        return self.sw_if_index

    def admin_up(self):
        if self.sw_if_index:
            return self._test.vapi.sw_interface_set_flags(
                sw_if_index=self.sw_if_index, flags=1)

    def admin_down(self):
        if self.sw_if_index:
            return self._test.vapi.sw_interface_set_flags(
                sw_if_index=self.sw_if_index, flags=0)

    def wait_for_link_up(self, timeout, step=1):
        if not self.sw_if_index:
            return False
        while True:
            dump = self.query_vpp_config()
            f = VppEnum.vl_api_if_status_flags_t.IF_STATUS_API_FLAG_LINK_UP
            if dump.flags & f:
                return True
            self._test.sleep(step)
            timeout -= step
            if timeout <= 0:
                return False

    def config_ip4(self):
        return self._test.vapi.sw_interface_add_del_address(
            sw_if_index=self.sw_if_index, prefix=self.ip_prefix)

    def remove_vpp_config(self):
        self._test.vapi.memif_delete(self.sw_if_index)
        self.sw_if_index = None

    def query_vpp_config(self):
        if not self.sw_if_index:
            return None
        dump = self._test.vapi.memif_dump()
        return get_if_dump(dump, self.sw_if_index)

    def object_id(self):
        if self.sw_if_index:
            return "%d:%d:%d" % (self.role, self.if_id, self.sw_if_index)
        else:
            return "%d:%d:None" % (self.role, self.if_id)