# coding=UTF-8
from api.models.market import iter_markets
from api.exceptions import ValidationError


def validate_keys_exists(obj, *keys):
    for key in keys:
        if not key in obj:
            raise ValidationError('No {} is specified'.format(key))
    return True


def is_number(s):
    try:
        float(s)
        return True
    except ValueError:
        return False


def validate_number(*values):
    for val in values:
        if not is_number(val):
            raise ValidationError('{} is not a number'.format(val))
    return True


def validate_territory(value):
    for market in iter_markets():
        if market.territory == value:
            return True
    raise ValidationError('{} is not a valid territory'.format(value))