from pathlib import Path

from packaging import version

from conftest import unit_stop
from unit.applications.lang.python import ApplicationPython
from unit.option import option

prerequisites = {
    'modules': {'python': lambda v: version.parse(v) >= version.parse('3.5')}
}

client = ApplicationPython(load_module='asgi')


def assert_cookies(prefix):
    for name in ['startup', 'shutdown']:
        path = Path(f'{option.test_dir}/python/lifespan/empty/{prefix}{name}')
        exists = path.is_file()
        path.unlink(missing_ok=True)

        assert not exists, name

    path = Path(f'{option.test_dir}/python/lifespan/empty/{prefix}version')
    versions = path.read_text(encoding='utf-8')
    path.unlink()

    assert versions == '3.0 2.0', 'versions'


def setup_cookies(prefix):
    base_dir = Path(f'{option.test_dir}/python/lifespan/empty')
    base_dir.chmod(0o777)

    for name in ['startup', 'shutdown', 'version']:
        path = Path(f'{option.test_dir}/python/lifespan/empty/{prefix}{name}')
        path.touch(0o777)


def test_asgi_lifespan():
    client.load('lifespan/empty')

    setup_cookies('')

    assert client.get()['status'] == 204

    unit_stop()

    assert_cookies('')


def test_asgi_lifespan_targets():
    path = f'{option.test_dir}/python/lifespan/empty'

    assert 'success' in client.conf(
        {
            "listeners": {"*:8080": {"pass": "routes"}},
            "routes": [
                {
                    "match": {"uri": "/1"},
                    "action": {"pass": "applications/targets/1"},
                },
                {
                    "match": {"uri": "/2"},
                    "action": {"pass": "applications/targets/2"},
                },
            ],
            "applications": {
                "targets": {
                    "type": client.get_application_type(),
                    "processes": {"spare": 0},
                    "working_directory": path,
                    "path": path,
                    "targets": {
                        "1": {"module": "asgi", "callable": "application"},
                        "2": {
                            "module": "asgi",
                            "callable": "application2",
                        },
                    },
                }
            },
        }
    )

    setup_cookies('')
    setup_cookies('app2_')

    assert client.get(url="/1")['status'] == 204
    assert client.get(url="/2")['status'] == 204

    unit_stop()

    assert_cookies('')
    assert_cookies('app2_')


def test_asgi_lifespan_failed(wait_for_record):
    client.load('lifespan/failed')

    assert client.get()['status'] == 503

    assert (
        wait_for_record(r'\[error\].*Application startup failed') is not None
    ), 'error message'
    assert wait_for_record(r'Exception blah') is not None, 'exception'


def test_asgi_lifespan_error(wait_for_record):
    client.load('lifespan/error')

    client.get()

    assert wait_for_record(r'Exception blah') is not None, 'exception'


def test_asgi_lifespan_error_auto(wait_for_record):
    client.load('lifespan/error_auto')

    client.get()

    assert wait_for_record(r'AssertionError') is not None, 'assertion'