from __future__ import absolute_import, unicode_literals

import re

from .rfc822 import _parse_date_rfc822

# Unicode strings for Greek date strings
_greek_months = \
  { \
   '\u0399\u03b1\u03bd': 'Jan',       # c9e1ed in iso-8859-7
   '\u03a6\u03b5\u03b2': 'Feb',       # d6e5e2 in iso-8859-7
   '\u039c\u03ac\u03ce': 'Mar',       # ccdcfe in iso-8859-7
   '\u039c\u03b1\u03ce': 'Mar',       # cce1fe in iso-8859-7
   '\u0391\u03c0\u03c1': 'Apr',       # c1f0f1 in iso-8859-7
   '\u039c\u03ac\u03b9': 'May',       # ccdce9 in iso-8859-7
   '\u039c\u03b1\u03ca': 'May',       # cce1fa in iso-8859-7
   '\u039c\u03b1\u03b9': 'May',       # cce1e9 in iso-8859-7
   '\u0399\u03bf\u03cd\u03bd': 'Jun', # c9effded in iso-8859-7
   '\u0399\u03bf\u03bd': 'Jun',       # c9efed in iso-8859-7
   '\u0399\u03bf\u03cd\u03bb': 'Jul', # c9effdeb in iso-8859-7
   '\u0399\u03bf\u03bb': 'Jul',       # c9f9eb in iso-8859-7
   '\u0391\u03cd\u03b3': 'Aug',       # c1fde3 in iso-8859-7
   '\u0391\u03c5\u03b3': 'Aug',       # c1f5e3 in iso-8859-7
   '\u03a3\u03b5\u03c0': 'Sep',       # d3e5f0 in iso-8859-7
   '\u039f\u03ba\u03c4': 'Oct',       # cfeaf4 in iso-8859-7
   '\u039d\u03bf\u03ad': 'Nov',       # cdefdd in iso-8859-7
   '\u039d\u03bf\u03b5': 'Nov',       # cdefe5 in iso-8859-7
   '\u0394\u03b5\u03ba': 'Dec',       # c4e5ea in iso-8859-7
  }

_greek_wdays = \
  { \
   '\u039a\u03c5\u03c1': 'Sun', # caf5f1 in iso-8859-7
   '\u0394\u03b5\u03c5': 'Mon', # c4e5f5 in iso-8859-7
   '\u03a4\u03c1\u03b9': 'Tue', # d4f1e9 in iso-8859-7
   '\u03a4\u03b5\u03c4': 'Wed', # d4e5f4 in iso-8859-7
   '\u03a0\u03b5\u03bc': 'Thu', # d0e5ec in iso-8859-7
   '\u03a0\u03b1\u03c1': 'Fri', # d0e1f1 in iso-8859-7
   '\u03a3\u03b1\u03b2': 'Sat', # d3e1e2 in iso-8859-7
  }

_greek_date_format_re = \
    re.compile('([^,]+),\s+(\d{2})\s+([^\s]+)\s+(\d{4})\s+(\d{2}):(\d{2}):(\d{2})\s+([^\s]+)')

def _parse_date_greek(dateString):
    '''Parse a string according to a Greek 8-bit date format.'''
    m = _greek_date_format_re.match(dateString)
    if not m:
        return
    wday = _greek_wdays[m.group(1)]
    month = _greek_months[m.group(3)]
    rfc822date = '%(wday)s, %(day)s %(month)s %(year)s %(hour)s:%(minute)s:%(second)s %(zonediff)s' % \
                 {'wday': wday, 'day': m.group(2), 'month': month, 'year': m.group(4),\
                  'hour': m.group(5), 'minute': m.group(6), 'second': m.group(7),\
                  'zonediff': m.group(8)}
    return _parse_date_rfc822(rfc822date)
