"""Test NotebookApp"""


import logging
import os
import re
from tempfile import NamedTemporaryFile

import nose.tools as nt

from traitlets.tests.utils import check_help_all_output

from jupyter_core.application import NoStart
from ipython_genutils.tempdir import TemporaryDirectory
from traitlets import TraitError
from notebook import notebookapp, __version__
NotebookApp = notebookapp.NotebookApp


def test_help_output():
    """ipython notebook --help-all works"""
    check_help_all_output('notebook')

def test_server_info_file():
    td = TemporaryDirectory()
    nbapp = NotebookApp(runtime_dir=td.name, log=logging.getLogger())
    def get_servers():
        return list(notebookapp.list_running_servers(nbapp.runtime_dir))
    nbapp.initialize(argv=[])
    nbapp.write_server_info_file()
    servers = get_servers()
    nt.assert_equal(len(servers), 1)
    nt.assert_equal(servers[0]['port'], nbapp.port)
    nt.assert_equal(servers[0]['url'], nbapp.connection_url)
    nbapp.remove_server_info_file()
    nt.assert_equal(get_servers(), [])

    # The ENOENT error should be silenced.
    nbapp.remove_server_info_file()

def test_nb_dir():
    with TemporaryDirectory() as td:
        app = NotebookApp(notebook_dir=td)
        nt.assert_equal(app.notebook_dir, td)

def test_no_create_nb_dir():
    with TemporaryDirectory() as td:
        nbdir = os.path.join(td, 'notebooks')
        app = NotebookApp()
        with nt.assert_raises(TraitError):
            app.notebook_dir = nbdir

def test_missing_nb_dir():
    with TemporaryDirectory() as td:
        nbdir = os.path.join(td, 'notebook', 'dir', 'is', 'missing')
        app = NotebookApp()
        with nt.assert_raises(TraitError):
            app.notebook_dir = nbdir

def test_invalid_nb_dir():
    with NamedTemporaryFile() as tf:
        app = NotebookApp()
        with nt.assert_raises(TraitError):
            app.notebook_dir = tf

def test_nb_dir_with_slash():
    with TemporaryDirectory(suffix="_slash/") as td:
        app = NotebookApp(notebook_dir=td)
        nt.assert_false(app.notebook_dir.endswith("/"))

def test_nb_dir_root():
    root = os.path.abspath(os.sep) # gets the right value on Windows, Posix
    app = NotebookApp(notebook_dir=root)
    nt.assert_equal(app.notebook_dir, root)

def test_generate_config():
    with TemporaryDirectory() as td:
        app = NotebookApp(config_dir=td)
        app.initialize(['--generate-config'])
        with nt.assert_raises(NoStart):
            app.start()
        assert os.path.exists(os.path.join(td, 'jupyter_notebook_config.py'))


#test if the version testin function works
def test_pep440_version():

    for version in [
        '4.1.0.b1',
        '4.1.b1',
        '4.2',
        'X.y.z',
        '1.2.3.dev1.post2',
        ]:
        def loc():
            with nt.assert_raises(ValueError):
                raise_on_bad_version(version)
        yield loc

    for version in [
        '4.1.1',
        '4.2.1b3',
        ]:

        yield (raise_on_bad_version, version)



pep440re = re.compile('^(\d+)\.(\d+)\.(\d+((a|b|rc)\d+)?)(\.post\d+)?(\.dev\d*)?$')

def raise_on_bad_version(version):
    if not pep440re.match(version):
        raise ValueError("Versions String does apparently not match Pep 440 specification, "
                         "which might lead to sdist and wheel being seen as 2 different release. "
                         "E.g: do not use dots for beta/alpha/rc markers.")


def test_current_version():
    raise_on_bad_version(__version__)