import re

from parser import command, argument, call


@argument('module', nargs='?', default='')
@command('test', help='runs the tests')
def test(args=None):
    """
    Runs the tests.
    """
    module = getattr(args, 'module', '')
    return call("DJANGO_SETTINGS_MODULE='tests.settings' coverage run "
                "./manage.py django test %s" % module)


@argument('--plain', action='store_true')
@command('coverage', help='Runs all tests and builds the coverage html files')
def coverage(args=None, plain=None):
    """
    Runs the tests and creates a coverage report.

    By default it creates a html report. With the argument --plain, it creates
    a plain report and fails under a certain amount of untested lines.
    """
    test()
    if plain is None:
        plain = getattr(args, 'plain', False)
    if plain:
        return call('coverage report -m --fail-under=80')
    else:
        return call('coverage html')


@command('check', help='Checks for pep8 errors in openslides and tests')
def check(args=None):
    """
    Checks for pep8 and other code styling conventions.
    """
    return call('flake8 --max-line-length=150 --statistics openslides tests')


@command('travis', help='Runs the code that travis does')
def travis(args=None):
    """
    Runs all commands that travis tests.
    """
    return_codes = []
    with open('.travis.yml') as f:
        script_lines = False
        for line in (line.strip() for line in f.readlines()):
            if line == 'script:':
                script_lines = True
                continue
            if not script_lines:
                continue

            match = re.search(r'"(.*)"', line)
            return_codes.append(call(match.group(1)))

    # Retuns True if one command exited with a different statuscode then 1
    return bool(list(filter(bool, return_codes)))


@argument('-r', '--requirements', nargs='?',
          default='requirements_production.txt')
@command('min_requirements',
         help='Prints a pip line to install the minimum supported versions of '
              'the requirements.')
def min_requirements(args=None):
    """
    Prints a pip install command to install the minimal supported versions of a
    requirement file.

    Uses requirements_production.txt by default.
    """

    from pip.req import parse_requirements

    def get_lowest_versions(requirements_file):
        for line in parse_requirements(requirements_file):
            yield '%s==%s' % (line.req.key, line.req.specs[0][1])

    print('pip install %s' % ' '.join(get_lowest_versions(args.requirements)))