# coding=UTF-8
import json
from flask import request, current_app, Response
import unidecode
import re

def check_api_key():
    api_keys = current_app.config.get("API_KEYS")
    if not api_keys:
        return
    auth = request.authorization
    if not auth or not auth.username in api_keys:
        response = json.dumps({'status': 401, 'message': 'No valid API key provided'})
        return Response(
            response, 401,
            {'WWW-Authenticate': 'Basic realm="Login Required"'}
        )


def slugify(text):
    """Converts a string to a human-readable url"""

    # translate
    text = unidecode.unidecode(text)

    # lowercase
    text = text.lower()

    # replace unwanted chars
    numbers = re.compile('(?<=\d),(?=\d)')
    text = numbers.sub('', text)
    unwanted_chars = re.compile(r'[^_a-z0-9/]+')
    text = unwanted_chars.sub('_', text)

    # remove redundant _
    duplicated_underscores = re.compile('_{2,}')
    text = duplicated_underscores.sub('_', text)
    text = text.strip('_')

    return text