text: # -*- coding: utf-8 -*-
  # ------------------------------------------------------------------------------
  #
  #   Copyright 2018-2020 Fetch.AI Limited
  #
  #   Licensed under the Apache License, Version 2.0 (the "License");
  #   you may not use this file except in compliance with the License.
  #   You may obtain a copy of the License at
  #
  #       http://www.apache.org/licenses/LICENSE-2.0
  #
  #   Unless required by applicable law or agreed to in writing, software
  #   distributed under the License is distributed on an "AS IS" BASIS,
  #   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  #   See the License for the specific language governing permissions and
  #   limitations under the License.
  #
  # ------------------------------------------------------------------------------
  
  """Implementation of the 'aea interact' subcommand."""
  
  import codecs
  import os
  from typing import Optional, TYPE_CHECKING, Type, Union
  
  import click
  
  from aea.cli.utils.constants import STUB_CONNECTION
  from aea.cli.utils.decorators import check_aea_project
  from aea.cli.utils.exceptions import InterruptInputException
  from aea.common import Address
  from aea.configurations.base import ConnectionConfig, PackageType, PublicId
  from aea.configurations.constants import (
      CONNECTIONS,
      DEFAULT_AEA_CONFIG_FILE,
      DEFAULT_PROTOCOL,
      PROTOCOLS,
      SIGNING_PROTOCOL,
      STATE_UPDATE_PROTOCOL,
      VENDOR,
  )
  from aea.configurations.loader import ConfigLoader
  from aea.connections.base import Connection
  from aea.crypto.wallet import CryptoStore
  from aea.helpers.io import open_file
  from aea.identity.base import Identity
  from aea.mail.base import Envelope, Message
  from aea.multiplexer import InBox, Multiplexer, OutBox
  from aea.protocols.base import Protocol
  from aea.protocols.dialogue.base import Dialogue as BaseDialogue
  from aea.protocols.dialogue.base import Dialogues
  
  
  if TYPE_CHECKING:  # pragma: nocover
      from packages.fetchai.connections.stub.connection import (  # noqa: F401
          DEFAULT_INPUT_FILE_NAME,
          DEFAULT_OUTPUT_FILE_NAME,
          StubConnection,
      )
      from packages.fetchai.protocols.default.dialogues import (  # noqa: F401
          DefaultDialogue,
          DefaultDialogues,
      )
      from packages.fetchai.protocols.default.message import DefaultMessage  # noqa: F401
  
  
  @click.command()
  @click.pass_context
  @check_aea_project
  def interact(
      click_context: click.core.Context,  # pylint: disable=unused-argument
  ) -> None:
      """Interact with the running agent via the stub connection."""
      click.echo("Starting AEA interaction channel...")
      _run_interaction_channel()
  
  
  def _load_packages(agent_identity: Identity) -> None:
      """Load packages in the current interpreter."""
      default_protocol_id = PublicId.from_str(DEFAULT_PROTOCOL)
      Protocol.from_dir(
          os.path.join(
              VENDOR, default_protocol_id.author, PROTOCOLS, default_protocol_id.name
          )
      )
      signing_protocol_id = PublicId.from_str(SIGNING_PROTOCOL)
      Protocol.from_dir(
          os.path.join(
              VENDOR, signing_protocol_id.author, PROTOCOLS, signing_protocol_id.name
          )
      )
      state_update_protocol_id = PublicId.from_str(STATE_UPDATE_PROTOCOL)
      Protocol.from_dir(
          os.path.join(
              VENDOR,
              state_update_protocol_id.author,
              PROTOCOLS,
              state_update_protocol_id.name,
          )
      )
      stub_connection_id = PublicId.from_str(STUB_CONNECTION)
      Connection.from_dir(
          os.path.join(
              VENDOR, stub_connection_id.author, CONNECTIONS, stub_connection_id.name,
          ),
          agent_identity,
          CryptoStore(),
          os.getcwd(),
      )
  
  
  def _run_interaction_channel() -> None:
      loader = ConfigLoader.from_configuration_type(PackageType.AGENT)
      agent_configuration = loader.load(open_file(DEFAULT_AEA_CONFIG_FILE))
      agent_name = agent_configuration.name
  
      identity_stub = Identity(agent_name + "_interact", "interact")
      _load_packages(identity_stub)
  
      # load agent configuration file
      from packages.fetchai.connections.stub.connection import (  # noqa: F811 # pylint: disable=import-outside-toplevel
          DEFAULT_INPUT_FILE_NAME,
          DEFAULT_OUTPUT_FILE_NAME,
          StubConnection,
      )
      from packages.fetchai.protocols.default.dialogues import (  # noqa: F811 # pylint: disable=import-outside-toplevel
          DefaultDialogue,
          DefaultDialogues,
      )
      from packages.fetchai.protocols.default.message import (  # noqa: F811 # pylint: disable=import-outside-toplevel
          DefaultMessage,
      )
  
      # load stub connection
      configuration = ConnectionConfig(
          input_file=DEFAULT_OUTPUT_FILE_NAME,
          output_file=DEFAULT_INPUT_FILE_NAME,
          connection_id=StubConnection.connection_id,
      )
  
      stub_connection = StubConnection(
          configuration=configuration, data_dir=os.getcwd(), identity=identity_stub
      )
      multiplexer = Multiplexer([stub_connection])
      inbox = InBox(multiplexer)
      outbox = OutBox(multiplexer)
  
      def role_from_first_message(  # pylint: disable=unused-argument
          message: Message, receiver_address: Address
      ) -> BaseDialogue.Role:
          """Infer the role of the agent from an incoming/outgoing first message
  
          :param message: an incoming/outgoing first message
          :param receiver_address: the address of the receiving agent
          :return: The role of the agent
          """
          return DefaultDialogue.Role.AGENT
  
      dialogues = DefaultDialogues(identity_stub.name, role_from_first_message)
  
      try:
          multiplexer.connect()
          while True:  # pragma: no cover
              _process_envelopes(agent_name, inbox, outbox, dialogues, DefaultMessage)
  
      except KeyboardInterrupt:
          click.echo("Interaction interrupted!")
      except BaseException as e:  # pylint: disable=broad-except # pragma: no cover
          click.echo(e)
      finally:
          multiplexer.disconnect()
  
  
  def _process_envelopes(
      agent_name: str,
      inbox: InBox,
      outbox: OutBox,
      dialogues: Dialogues,
      message_class: Type[Message],
  ) -> None:
      """
      Process envelopes.
  
      :param agent_name: name of an agent.
      :param inbox: an inbox object.
      :param outbox: an outbox object.
      :param dialogues: the dialogues object.
      :param message_class: the message class.
      """
      envelope = _try_construct_envelope(agent_name, dialogues, message_class)
      if envelope is None:
          _check_for_incoming_envelope(inbox, message_class)
      else:
          outbox.put(envelope)
          click.echo(_construct_message("sending", envelope, message_class))
  
  
  def _check_for_incoming_envelope(inbox: InBox, message_class: Type[Message]) -> None:
      if not inbox.empty():
          envelope = inbox.get_nowait()
          if envelope is None:
              raise ValueError("Could not recover envelope from inbox.")
          click.echo(_construct_message("received", envelope, message_class))
      else:
          click.echo("Received no new envelope!")
  
  
  def _construct_message(
      action_name: str, envelope: Envelope, message_class: Type[Message]
  ) -> str:
      action_name = action_name.title()
      msg = (
          message_class.serializer.decode(envelope.message)
          if isinstance(envelope.message, bytes)
          else envelope.message
      )
      message = (
          "\n{} envelope:\nto: "
          "{}\nsender: {}\nprotocol_specification_id: {}\nmessage: {}\n".format(
              action_name,
              envelope.to,
              envelope.sender,
              envelope.protocol_specification_id,
              msg,
          )
      )
      return message
  
  
  def _try_construct_envelope(
      agent_name: str, dialogues: Dialogues, message_class: Type[Message]
  ) -> Optional[Envelope]:
      """Try construct an envelope from user input."""
      envelope = None  # type: Optional[Envelope]
      try:
          performative_str = "bytes"
          performative = message_class.Performative(performative_str)
          click.echo(
              f"Provide message of protocol '{str(message_class.protocol_id)}' for performative {performative_str}:"
          )
          message_escaped = input()  # nosec
          message_escaped = message_escaped.strip()
          if message_escaped == "":
              raise InterruptInputException
          message_decoded = codecs.decode(
              message_escaped.encode("utf-8"), "unicode-escape"
          )
          message = message_decoded.encode("utf-8")  # type: Union[str, bytes]
          msg, _ = dialogues.create(
              counterparty=agent_name, performative=performative, content=message,
          )
          envelope = Envelope(to=msg.to, sender=msg.sender, message=msg,)
      except InterruptInputException:
          click.echo("Interrupting input, checking inbox ...")
      except KeyboardInterrupt:
          raise
      except BaseException as e:  # pylint: disable=broad-except # pragma: no cover
          click.echo(e)
      return envelope
  