# coding=utf-8
import subprocess
import tempfile
from unittest import mock

import pytest
import time
from datetime import datetime

from tsgrain_controller import application, models
from tsgrain_controller.io import io_factory
from tests import fixtures

JOB1_DATA = {
    'date': datetime(2022, 1, 10, 12, 30),
    'duration': 60,
    'enable': True,
    'repeat': False,
    'zones': [1, 3]
}

JOB2_DATA = {
    'date': datetime(2022, 1, 11, 18, 0),
    'duration': 300,
    'enable': True,
    'repeat': True,
    'zones': [5]
}


@pytest.fixture
def app(mocker):
    mocker.patch('tsgrain_controller.io.io_factory.new_io',
                 return_value=fixtures.TestingIo())

    with tempfile.TemporaryDirectory() as td:
        app = application.Application(io_factory.IoType.NONE, td,
                                      fixtures.FILE_CFG)

        assert not app.is_running()
        app.start()
        assert app.is_running()
        yield app
        app.stop()
        assert not app.is_running()


def test_start_task(app):
    # Manually start a task (like via button press)
    res = app.request_task(
        models.TaskRequest(source=models.Source.MANUAL,
                           zone_id=2,
                           duration=30,
                           queuing=False,
                           cancelling=True))
    assert res.started
    assert not res.stopped

    # Queue processing time
    time.sleep(0.1)

    # Try to start the same task again -> nothing happens
    res = app.request_task(
        models.TaskRequest(source=models.Source.MANUAL,
                           zone_id=2,
                           duration=30,
                           queuing=False,
                           cancelling=False))
    assert not res.started
    assert not res.stopped

    # Try to start the same task again -> task should cancel
    res = app.request_task(
        models.TaskRequest(source=models.Source.MANUAL,
                           zone_id=2,
                           duration=30,
                           queuing=False,
                           cancelling=True))
    assert not res.started
    assert res.stopped


def test_start_task_queue(app):
    # Manually start a task (like via button press)
    res = app.request_task(
        models.TaskRequest(source=models.Source.MANUAL,
                           zone_id=2,
                           duration=30,
                           queuing=False,
                           cancelling=True))
    assert res.started
    assert not res.stopped
    assert len(app.queue.tasks) == 1
    assert app.queue.tasks[0].zone_id == 2

    # Duplicate task should not be enqueued
    res = app.request_task(
        models.TaskRequest(source=models.Source.MANUAL,
                           zone_id=2,
                           duration=30,
                           queuing=True,
                           cancelling=False))
    assert not res.started
    assert not res.stopped
    assert len(app.queue.tasks) == 1

    # Enqueue a new task
    res = app.request_task(
        models.TaskRequest(source=models.Source.MANUAL,
                           zone_id=3,
                           duration=30,
                           queuing=True,
                           cancelling=False))
    assert res.started
    assert not res.stopped

    tasks = app.get_tasks()
    assert len(tasks) == 2

    assert tasks[0].zone_id == 2
    assert tasks[1].zone_id == 3


def test_crud_job(app):
    # Insert jobs
    job1 = models.Job.deserialize(JOB1_DATA)
    job2 = models.Job.deserialize(JOB2_DATA)

    assert app.create_job(job1) == job1.id == 1
    assert app.create_job(job2) == job2.id == 2

    # Get a job
    got_job = app.get_job(1)
    assert got_job.id == 1
    assert got_job.serialize() == JOB1_DATA

    # Get all jobs
    got_jobs = app.get_jobs()
    assert len(got_jobs) == 2
    assert got_jobs[0].zones == [1, 3]
    assert got_jobs[1].zones == [5]

    # Update job
    job2.zones = [4, 5]
    app.update_job(job2)
    assert app.get_job(2).zones == [4, 5]

    # Disable job
    app.disable_job(1)
    assert app.get_job(1).enable is False

    # Enable job
    app.enable_job(1)
    assert app.get_job(1).enable is True

    # Delete job
    app.delete_job(1)
    assert len(app.get_jobs()) == 1

    # Get job that does not exist
    with pytest.raises(KeyError):
        app.get_job(1)

    # Delete job that does not exist
    with pytest.raises(KeyError):
        app.delete_job(1)


def test_get_system_datetime(app, mocker):
    mock_res = mock.Mock()
    mock_res.stdout = 'Europe/Berlin'

    cmd_run_mock: mock.MagicMock = mocker.patch('subprocess.run',
                                                return_value=mock_res)

    tz = app.get_system_timezone()
    assert tz == 'Europe/Berlin'

    cmd_parts = ['cat', '/etc/timezone']
    cmd_run_mock.assert_called_once_with(cmd_parts,
                                         check=True,
                                         universal_newlines=True,
                                         stdout=subprocess.PIPE,
                                         stderr=subprocess.PIPE)


def test_set_system_datetime(app, mocker):
    cmd_run_mock: mock.MagicMock = mocker.patch('subprocess.run')

    date_time = datetime(2021, 12, 25, 16, 30, 14)
    app.set_system_datetime(date_time)

    cmd_parts = ['date', '-s', '2021-12-25 16:30:14']
    cmd_run_mock.assert_called_once_with(cmd_parts,
                                         check=True,
                                         universal_newlines=True,
                                         stdout=subprocess.PIPE,
                                         stderr=subprocess.PIPE)


def test_set_system_timezone(app, mocker):
    cmd_run_mock: mock.MagicMock = mocker.patch('subprocess.run')

    app.set_system_timezone('Europe/Berlin')

    cmd_parts = ['timedatectl', 'set-timezone', 'Europe/Berlin']
    cmd_run_mock.assert_called_once_with(cmd_parts,
                                         check=True,
                                         universal_newlines=True,
                                         stdout=subprocess.PIPE,
                                         stderr=subprocess.PIPE)