"""Module tests/core/sig_chain/test_receive provide test for receiver"""
import pytest
import time
import unittest
from unittest import mock

from func_timeout import FunctionTimedOut

from core.sig_chain.device.connector_interface import DataMode
from core.sig_chain.device.connector_interface import Device
from core.sig_chain.sig_receive import Receiver



def teardown_function():
    Receiver.clear_instance()


def test_new_receiver_is_not_ready():
    receiver = Receiver()
    assert not receiver.is_ready


def test_before_select_can_not_setup_connector():
    receiver = Receiver()
    with pytest.raises(AssertionError):
        receiver.setup_connector()


def test_before_setup_connector_receive_data_failed():
    receiver = Receiver()
    with pytest.raises(AssertionError):
        receiver.start_receive_wave()


def test_before_setup_connector_get_data_from_buffer_failed():
    receiver = Receiver()
    receiver.select_connector(Device.NEO, 1)

    receiver.buffer_plot.get_sig = \
        mock.MagicMock(return_value={'status': 'ok'})
    with pytest.raises(RuntimeError):
        receiver.get_data_from_buffer('plot')

    receiver.buffer_classify_online.get_sig = \
        mock.MagicMock(return_value={'status': 'ok'})
    with pytest.raises(RuntimeError):
        receiver.get_data_from_buffer('classify_online')


def test_before_setup_connector_stop_receive_pass():
    receiver = Receiver()
    receiver.select_connector(Device.NEO, 1)
    receiver.stop_receive()


def test_after_setup_connector_is_ready():
    receiver = Receiver()
    receiver.select_connector(Device.NEO, 1)

    receiver.connector.get_ready = mock.MagicMock(return_value=True)
    receiver.setup_connector()
    assert receiver.is_ready


def test_after_setup_wave_receive_mode_is_ready():
    receiver = Receiver()
    receiver.select_connector(Device.NEO, 1)

    receiver.connector.setup_wave_mode = mock.MagicMock(return_value=True)
    receiver.setup_receive_mode(DataMode.WAVE)
    assert receiver.is_ready


def test_after_setup_impedance_receive_mode_is_ready():
    receiver = Receiver()
    receiver.select_connector(Device.NEO, 1)

    receiver.connector.setup_impedance_mode = \
        mock.MagicMock(return_value=True)
    receiver.setup_receive_mode(DataMode.IMPEDANCE)
    assert receiver.is_ready


def test_failed_setup_wave_receive_mode_is_not_ready():
    receiver = Receiver()
    receiver.select_connector(Device.NEO, 1)

    receiver.connector.setup_wave_mode = mock.MagicMock(return_value=False)
    receiver.setup_receive_mode(DataMode.WAVE)
    assert not receiver.is_ready


def test_failed_setup_impedance_receive_mode_is_not_ready():
    receiver = Receiver()
    receiver.select_connector(Device.NEO, 1)

    receiver.connector.setup_impedance_mode = mock.MagicMock(return_value=False)
    receiver.setup_receive_mode(DataMode.IMPEDANCE)
    assert not receiver.is_ready


def test_before_ready_stop_receive_pass():
    receiver = Receiver()
    receiver.stop_receive()


def test_after_stop_receive_is_not_ready():
    receiver = Receiver()
    receiver.select_connector(Device.NEO, 1)

    receiver.connector.get_ready = mock.MagicMock(return_value=True)
    receiver.setup_connector()
    receiver.connector.stop = mock.MagicMock(return_value=True)
    receiver.stop_receive()
    assert not receiver.is_ready


def test_receiver_singleton_keep_status():
    receiver = Receiver()
    receiver.is_ready = True
    receiver = Receiver()
    assert receiver.is_ready


def test_change_wave_to_impedance_mode_success():
    receiver = Receiver()
    receiver.select_connector(Device.NEO, 1)

    receiver.clear_all_buffer = mock.MagicMock()
    receiver.connector.get_ready = mock.MagicMock(return_value=True)
    receiver.setup_connector()

    receiver.connector.stop = mock.MagicMock(return_value=True)
    receiver.stop_receive()

    receiver.connector.setup_impedance_mode = mock.MagicMock(return_value=True)
    success = receiver.setup_receive_mode(DataMode.IMPEDANCE)
    assert success


def test_after_setup_connector_buffers_are_cleared():
    receiver = Receiver()

    mock_connector = mock.MagicMock()
    mock_connector.get_ready.return_value = True
    receiver.connector = mock_connector

    mock_clear_all_buffer = mock.MagicMock()
    receiver.clear_all_buffer = mock_clear_all_buffer

    receiver.setup_connector()
    assert mock_clear_all_buffer.called


def test_after_reset_receive_mode_buffers_are_cleared():
    receiver = Receiver()

    mock_connector = mock.MagicMock()
    mock_connector.setup_wave_mode = mock.MagicMock()
    receiver.connector = mock_connector

    mock_clear_all_buffer = mock.MagicMock()
    receiver.clear_all_buffer = mock_clear_all_buffer

    receiver.setup_receive_mode(DataMode.WAVE)
    assert mock_clear_all_buffer.called


def test_get_data_from_invalid_buffer_type_failed():
    receiver = Receiver()
    receiver.select_connector(Device.NEO, 1)
    receiver.is_ready = True
    with pytest.raises(AssertionError):
        receiver.get_data_from_buffer('xxx')


def test_get_data_from_buffer_success():
    receiver = Receiver()
    receiver.select_connector(Device.NEO, 1)
    receiver.is_ready = True

    mock_data = {'status': 'ok', 'data': 1}
    receiver.buffer_plot.get_sig = \
        mock.MagicMock(return_value=mock_data)

    ret = receiver.get_data_from_buffer('plot')
    assert ret == mock_data


@unittest.skip('加入timeout机制会导致卡顿，因此删除此功能')
def test_limit_time_to_get_data_from_buffer():
    receiver = Receiver()
    receiver.select_connector(Device.NEO, 1)
    receiver.is_ready = True

    receiver.buffer_plot.get_sig = \
        mock.MagicMock(return_value={'status': 'warn'})

    with pytest.raises(FunctionTimedOut):
        receiver.get_data_from_buffer('plot')


@unittest.skip('依赖硬件')
def test_main():
    receiver = Receiver()
    receiver.select_connector(Device.NEO, 1)
    if receiver.setup_connector():
        receiver.start_receive_wave()
    for _ in range(20):
        time.sleep(1)
        data_from_buffer = receiver.get_data_from_buffer('plot')
        if data_from_buffer:
            raw_data = data_from_buffer['data']
            print(raw_data)
    receiver.stop_receive()

    receiver.setup_receive_mode(DataMode.IMPEDANCE)
    for _ in range(20):
        time.sleep(1)
        impedance = receiver.receive_impedance()
        if impedance:
            print(impedance)