# -*- coding: utf-8 -*-
from __future__ import unicode_literals

import json
import mock
import pytest

from robot_interface.endpoints.face_detector import FaceDetectionSender
from robot_interface.state import state


@pytest.fixture(autouse=True)
def initialized_state(monkeypatch):
    """
    Fully initialize global state so __getattribute__ allows access.
    """
    # Bypass the initialization guard
    monkeypatch.setattr(state, "is_initialized", True, raising=False)

    # Install a controllable exit_event
    exit_event = mock.Mock()
    exit_event.is_set = mock.Mock(return_value=True)
    monkeypatch.setattr(state, "exit_event", exit_event, raising=False)

    # Default qi_session is None unless overridden
    monkeypatch.setattr(state, "qi_session", None, raising=False)

    yield


def test_start_face_detection_no_qi_session():
    """
    Returns early when qi_session is None.
    """
    sender = FaceDetectionSender(mock.Mock())
    sender.start_face_detection()

    assert sender._face_thread is None
    assert sender._face_service is None
    assert sender._memory_service is None


def test_start_face_detection_happy_path(mocker):
    """
    Initializes services and starts background thread.
    """
    mock_face = mock.Mock()
    mock_memory = mock.Mock()

    mock_qi = mock.Mock()
    mock_qi.service.side_effect = lambda name: {
        "ALFaceDetection": mock_face,
        "ALMemory": mock_memory,
    }[name]

    state.qi_session = mock_qi

    fake_thread = mock.Mock()
    mocker.patch("threading.Thread", return_value=fake_thread)

    sender = FaceDetectionSender(mock.Mock())
    sender.start_face_detection()

    mock_face.setTrackingEnabled.assert_called_with(False)
    mock_face.setRecognitionEnabled.assert_called_with(False)
    mock_face.subscribe.assert_called_once()
    fake_thread.start.assert_called_once()


def test_face_loop_face_detected_true(mocker):
    """
    Sends face_detected=True when face data exists.
    """
    sender = FaceDetectionSender(mock.Mock())

    sender._memory_service = mock.Mock()
    sender._memory_service.getData.return_value = [0, [[1]]]
    sender.socket = mock.Mock()

    mocker.patch("time.sleep")
    state.exit_event.is_set.side_effect = [False, True]

    sender._face_loop()

    sent = sender.socket.send.call_args[0][0]
    payload = json.loads(sent.decode("utf-8"))

    assert payload["face_detected"] is True


def test_face_loop_face_detected_false(mocker):
    """
    Sends face_detected=False when no face data exists.
    """
    sender = FaceDetectionSender(mock.Mock())

    sender._memory_service = mock.Mock()
    sender._memory_service.getData.return_value = []
    sender.socket = mock.Mock()

    mocker.patch("time.sleep")
    state.exit_event.is_set.side_effect = [False, True]

    sender._face_loop()

    sent = sender.socket.send.call_args[0][0]
    payload = json.loads(sent.decode("utf-8"))

    assert not payload["face_detected"]


def test_face_loop_handles_exception(mocker):
    """
    Exceptions inside loop are swallowed.
    """
    sender = FaceDetectionSender(mock.Mock())

    sender._memory_service = mock.Mock()
    sender._memory_service.getData.side_effect = Exception("boom")
    sender.socket = mock.Mock()

    mocker.patch("time.sleep")
    state.exit_event.is_set.side_effect = [False, True]

    # Must not raise
    sender._face_loop()


def test_stop_face_detection_happy_path():
    """
    Unsubscribes and disables tracking.
    """
    sender = FaceDetectionSender(mock.Mock())

    mock_face = mock.Mock()
    sender._face_service = mock_face

    sender.stop_face_detection()

    mock_face.unsubscribe.assert_called_once()
    mock_face.setTrackingEnabled.assert_called_with(False)


def test_stop_face_detection_exception():
    """
    stop_face_detection swallows service exceptions.
    """
    sender = FaceDetectionSender(mock.Mock())

    mock_face = mock.Mock()
    mock_face.unsubscribe.side_effect = Exception("fail")
    sender._face_service = mock_face

    sender.stop_face_detection()


def test_close_calls_stop_face_detection(mocker):
    """
    close() calls parent close and stop_face_detection().
    """
    sender = FaceDetectionSender(mock.Mock())

    mocker.patch.object(sender, "stop_face_detection")
    mocker.patch(
        "robot_interface.endpoints.face_detector.SocketBase.close"
    )

    sender.close()

    sender.stop_face_detection.assert_called_once()