import os
import importlib.util

# Automatically detect the path to the webssh package
spec = importlib.util.find_spec('webssh')
base_dir = os.path.dirname(spec.origin) if spec else None
font_dirs = ['static', 'css', 'fonts']
max_body_size = 1 * 1024 * 1024


class Font(object):

    def __init__(self, filename, dirs):
        self.family = self.get_family(filename)
        self.url = self.get_url(filename, dirs)

    def get_family(self, filename):
        return filename.split('.')[0]

    def get_url(self, filename, dirs):
        return '/'.join(dirs + [filename])

def get_font_filename(font, font_dir):
    filenames = {f for f in os.listdir(font_dir) if not f.startswith('.')
                 and os.path.isfile(os.path.join(font_dir, f))}
    if font:
        if font not in filenames:
            raise ValueError(
                'Font file {!r} not found'.format(os.path.join(font_dir, font))
            )
    elif filenames:
        font = filenames.pop()

    return font