from astropy.coordinates import SkyCoord 
from astropy.coordinates import ICRS, Galactic, FK4, FK5  
from astropy.coordinates import Angle, Latitude, Longitude 
import astropy.units as u

class FloatConverter:
    regex = '[-?\d\.\d]+'

    def to_python(self, value):
        return float(value)

    def to_url(self, value):
        return '{}'.format(value)    


def make_source_name(key, ra, dec):
    """ Makes source name in format JHHMMSS.s+/-DDMMSS based on input RA and Dec. """
    try:
        c = SkyCoord(ra, dec, frame=FK5(), unit="deg")
        str1 = c.to_string('hmsdms',alwayssign=False,pad=False,precision=1).split()
        str2 = c.to_string('hmsdms',alwayssign=True,pad=False,precision=0).split()
        name = key+" J%s%s" % (str1[0].replace('h','').replace('m','').replace('s',''),
                               str2[1].replace('d','').replace('m','').replace('s',''))
        return(name)
    except:
        return('None')

status_code = {0:"No error", 
               1:'<a href="/">SRG arXiv</a>: User is not authenticated', 
               2:'<a href="/">SRG arXiv</a>: User has no user profile', 
               3:'<a href="/">SRG arXiv</a>: User has no appropriate group to access this page',}

def srg_group_auth(user, group):

    if not user.is_authenticated:
        return 1
    try:
        user_profile=user.profile
    except:
        return 2

    if not user.groups.filter(name=group).exists():
        return 3

    return 0