## Nim-LibP2P
## Copyright (c) 2021 Status Research & Development GmbH
## Licensed under either of
##  * Apache License, version 2.0, ([LICENSE-APACHE](LICENSE-APACHE))
##  * MIT license ([LICENSE-MIT](LICENSE-MIT))
## at your option.
## This file may not be copied, modified, or distributed except according to
## those terms.

{.push raises: [Defect].}

import
  std/[streams, strutils, tables],
  chronos, chronicles

import nameresolver

export tables

logScope:
  topics = "libp2p mockresolver"

type MockResolver* = ref object of NameResolver
  txtResponses*: Table[string, seq[string]]
  # key: address, isipv6?
  ipResponses*: Table[(string, bool), seq[string]]

method resolveIp*(
  self: MockResolver,
  address: string,
  port: Port,
  domain: Domain = Domain.AF_UNSPEC): Future[seq[TransportAddress]] {.async.} =
  if domain == Domain.AF_INET or domain == Domain.AF_UNSPEC:
    for resp in self.ipResponses.getOrDefault((address, false)):
      result.add(initTAddress(resp, port))

  if domain == Domain.AF_INET6 or domain == Domain.AF_UNSPEC:
    for resp in self.ipResponses.getOrDefault((address, true)):
      result.add(initTAddress(resp, port))

method resolveTxt*(
  self: MockResolver,
  address: string): Future[seq[string]] {.async.} =
  return self.txtResponses.getOrDefault(address)

proc new*(T: typedesc[MockResolver]): T = T()