import sys
from contextlib import contextmanager

import pytest
from io import StringIO

from nucypher.cli.main import NucypherClickConfig
from nucypher.cli.protocol import UrsulaCommandProtocol
import sys
from contextlib import contextmanager

import pytest
from io import StringIO

from nucypher.cli.main import NucypherClickConfig
from nucypher.cli.protocol import UrsulaCommandProtocol

# Disable click sentry and file logging TODO: is this working?

NucypherClickConfig.log_to_sentry = False
NucypherClickConfig.log_to_file = False


@contextmanager
def capture_output():
    new_out, new_err = StringIO(), StringIO()
    old_out, old_err = sys.stdout, sys.stderr
    try:
        sys.stdout, sys.stderr = new_out, new_err
        yield sys.stdout, sys.stderr
    finally:
        sys.stdout, sys.stderr = old_out, old_err


@pytest.fixture(scope='module')
def ursula(federated_ursulas):
    ursula = federated_ursulas.pop()
    return ursula


@pytest.fixture(scope='module')
def protocol(ursula):
    protocol = UrsulaCommandProtocol(ursula=ursula)
    return protocol


def test_ursula_command_protocol_creation(ursula):

    protocol = UrsulaCommandProtocol(ursula=ursula)

    assert protocol.ursula == ursula
    assert b'Ursula' in protocol.prompt


def test_ursula_command_help(protocol, ursula):

    class FakeTransport:
        """This is a transport"""

        mock_output = b''

        @staticmethod
        def write(data: bytes):
            FakeTransport.mock_output += data

    protocol.transport = FakeTransport

    with capture_output() as (out, err):
        protocol.lineReceived(line=b'bananas')

    # Ensure all commands are in the help text
    result = out.getvalue()
    for command in protocol.commands:
        assert command in result, '{} is missing from help text'.format(command)

    # Blank lines are OK!
    with capture_output() as (out, err):
        protocol.lineReceived(line=b'')
    assert protocol.prompt in FakeTransport.mock_output


def test_ursula_command_status(protocol, ursula):

    with capture_output() as (out, err):
        protocol.paintStatus()
    result = out.getvalue()
    assert ursula.checksum_public_address in result
    assert '...' in result
    assert 'Known Nodes' in result


def test_ursula_command_known_nodes(protocol, ursula):

    with capture_output() as (out, err):
        protocol.paintKnownNodes()
    result = out.getvalue()
    assert 'Known Nodes' in result
    assert ursula.checksum_public_address not in result