import argparse
import datetime
from urllib.parse import urlparse


def check_cve_score(value):
    try:
        value = float(value)
        if value < 0 or value > 10:
            raise ValueError
        return value
    except ValueError:
        raise argparse.ArgumentTypeError('CVE Score has to be between 0.0 and 10.0')


def check_date_format(value):
    try:
        datetime.datetime.strptime(value, '%Y-%m-%d')
        return value
    except ValueError as e:
        raise argparse.ArgumentTypeError('Date has to be in correct YYYY-MM-DD format')


def check_url(value):
    result = urlparse(value)
    if not result.netloc or not result.scheme:
        raise argparse.ArgumentTypeError('URL is not correct')
    return value


def check_proxy_url(value):
    if value == "":
        return value
    check_url(value)
    if not value.lower().startswith("http://"):
        raise argparse.ArgumentTypeError('URL must start with http://')
    return value