from datetime import datetime
from unittest.mock import patch

import pytest

from minitor.main import Alert
from minitor.main import Monitor
from tests.util import assert_called_once_with


class TestAlert(object):
    @pytest.fixture
    def monitor(self):
        return Monitor(
            {
                "name": "Dummy Monitor",
                "command": ["echo", "foo"],
            }
        )

    @pytest.fixture
    def echo_alert(self):
        return Alert(
            "log",
            {
                "command": [
                    "echo",
                    (
                        "{monitor_name} has failed {failure_count} time(s)!\n"
                        "We have alerted {alert_count} time(s)\n"
                        "Last success was {last_success}\n"
                        "Last output was: {last_output}"
                    ),
                ]
            },
        )

    @pytest.mark.parametrize(
        "last_success,expected_success",
        [(None, "Never"), (datetime(2018, 4, 10), "2018-04-10T00:00:00")],
    )
    def test_simple_alert(self, monitor, echo_alert, last_success, expected_success):
        monitor.alert_count = 1
        monitor.last_output = "beep boop"
        monitor.last_success = last_success
        monitor.total_failure_count = 1
        with patch.object(echo_alert._logger, "error") as mock_error:
            echo_alert.alert("Exception message", monitor)
            assert_called_once_with(
                mock_error,
                "Dummy Monitor has failed 1 time(s)!\n"
                "We have alerted 1 time(s)\n"
                "Last success was " + expected_success + "\n"
                "Last output was: beep boop",
            )