from abc import ABC, abstractmethod
from typing import List, Sequence

from multiaddr import Multiaddr

from .id import ID


class IAddrBook(ABC):
    @abstractmethod
    def add_addr(self, peer_id: ID, addr: Multiaddr, ttl: int) -> None:
        """
        Calls add_addrs(peer_id, [addr], ttl)

        :param peer_id: the peer to add address for
        :param addr: multiaddress of the peer
        :param ttl: time-to-live for the address (after this time, address is no longer valid)
        """

    @abstractmethod
    def add_addrs(self, peer_id: ID, addrs: Sequence[Multiaddr], ttl: int) -> None:
        """
        Adds addresses for a given peer all with the same time-to-live. If one
        of the addresses already exists for the peer and has a longer TTL, no
        operation should take place. If one of the addresses exists with a
        shorter TTL, extend the TTL to equal param ttl.

        :param peer_id: the peer to add address for
        :param addr: multiaddresses of the peer
        :param ttl: time-to-live for the address (after this time, address is no longer valid
        """

    @abstractmethod
    def addrs(self, peer_id: ID) -> List[Multiaddr]:
        """
        :param peer_id: peer to get addresses of
        :return: all known (and valid) addresses for the given peer
        """

    @abstractmethod
    def clear_addrs(self, peer_id: ID) -> None:
        """
        Removes all previously stored addresses.

        :param peer_id: peer to remove addresses of
        """

    @abstractmethod
    def peers_with_addrs(self) -> List[ID]:
        """
        :return: all of the peer IDs stored with addresses
        """