from parser import command, argument, call
import yaml
import requirements

FAIL = '\033[91m'
SUCCESS = '\033[92m'
RESET = '\033[0m'


@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:
        travis = yaml.load(f)
        for line in travis['script']:
            print('Run: {}'.format(line))
            return_code = call(line)
            return_codes.append(return_code)
            if return_code:
                print(FAIL + 'fail!\n' + RESET)
            else:
                print(SUCCESS + 'success!\n' + RESET)

    # 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.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.txt by default.

    The following line will install the version:

    pip install $(python make min_requirements)
    """
    def get_lowest_versions(requirements_file):
        with open(requirements_file) as f:
            for req in requirements.parse(f):
                if req.specifier:
                    for spec, version in req.specs:
                        if spec == ">=":
                            yield "{}=={}".format(req.name, version)

    print(' '.join(get_lowest_versions(args.requirements)))


@command('clear',
         help='Deletes unneeded files and folders')
def clean(args=None):
    """
    Deletes all .pyc and .orig files and empty folders.
    """
    call('find -name "*.pyc" -delete')
    call('find -name "*.orig" -delete')
    call('find -type d -empty -delete')


@command('isort',
         help='Sorts all imports in all python files.')
def isort(args=None):
    return call('isort --recursive openslides tests')