## Nim-Codex
## Copyright (c) 2022 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.

import pkg/chronos
import pkg/libp2p
import pkg/questionable
import pkg/codex/discovery
import pkg/contractabi/address as ca

type
  MockDiscovery* = ref object of Discovery
    findBlockProvidersHandler*: proc(d: MockDiscovery, cid: Cid):
      Future[seq[SignedPeerRecord]] {.gcsafe.}
    publishBlockProvideHandler*: proc(d: MockDiscovery, cid: Cid):
      Future[void] {.gcsafe.}
    findHostProvidersHandler*: proc(d: MockDiscovery, host: ca.Address):
      Future[seq[SignedPeerRecord]] {.gcsafe.}
    publishHostProvideHandler*: proc(d: MockDiscovery, host: ca.Address):
      Future[void] {.gcsafe.}

proc new*(T: type MockDiscovery): MockDiscovery =
  MockDiscovery()

proc findPeer*(
    d: Discovery,
    peerId: PeerId
): Future[?PeerRecord] {.async.} =
  ## mock find a peer - always return none
  ## 
  return none(PeerRecord)

method find*(
    d: MockDiscovery,
    cid: Cid
): Future[seq[SignedPeerRecord]] {.async.} =
  if isNil(d.findBlockProvidersHandler):
    return

  return await d.findBlockProvidersHandler(d, cid)

method provide*(d: MockDiscovery, cid: Cid): Future[void] {.async.} =
  if isNil(d.publishBlockProvideHandler):
    return

  await d.publishBlockProvideHandler(d, cid)

method find*(
    d: MockDiscovery,
    host: ca.Address
): Future[seq[SignedPeerRecord]] {.async.} =
  if isNil(d.findHostProvidersHandler):
    return

  return await d.findHostProvidersHandler(d, host)

method provide*(d: MockDiscovery, host: ca.Address): Future[void] {.async.} =
  if isNil(d.publishHostProvideHandler):
    return

  await d.publishHostProvideHandler(d, host)