from __future__ import absolute_import, unicode_literals

import re

from .w3dtf import _parse_date_w3dtf

# 8-bit date handling routines written by ytrewq1.
_korean_year  = '\ub144' # b3e2 in euc-kr
_korean_month = '\uc6d4' # bff9 in euc-kr
_korean_day   = '\uc77c' # c0cf in euc-kr
_korean_am    = '\uc624\uc804' # bfc0 c0fc in euc-kr
_korean_pm    = '\uc624\ud6c4' # bfc0 c8c4 in euc-kr

_korean_onblog_date_re = \
    re.compile('(\d{4})%s\s+(\d{2})%s\s+(\d{2})%s\s+(\d{2}):(\d{2}):(\d{2})' % \
               (_korean_year, _korean_month, _korean_day))
_korean_nate_date_re = \
    re.compile('(\d{4})-(\d{2})-(\d{2})\s+(%s|%s)\s+(\d{,2}):(\d{,2}):(\d{,2})' % \
               (_korean_am, _korean_pm))
def _parse_date_onblog(dateString):
    '''Parse a string according to the OnBlog 8-bit date format'''
    m = _korean_onblog_date_re.match(dateString)
    if not m:
        return
    w3dtfdate = '%(year)s-%(month)s-%(day)sT%(hour)s:%(minute)s:%(second)s%(zonediff)s' % \
                {'year': m.group(1), 'month': m.group(2), 'day': m.group(3),\
                 'hour': m.group(4), 'minute': m.group(5), 'second': m.group(6),\
                 'zonediff': '+09:00'}
    return _parse_date_w3dtf(w3dtfdate)

def _parse_date_nate(dateString):
    '''Parse a string according to the Nate 8-bit date format'''
    m = _korean_nate_date_re.match(dateString)
    if not m:
        return
    hour = int(m.group(5))
    ampm = m.group(4)
    if (ampm == _korean_pm):
        hour += 12
    hour = str(hour)
    if len(hour) == 1:
        hour = '0' + hour
    w3dtfdate = '%(year)s-%(month)s-%(day)sT%(hour)s:%(minute)s:%(second)s%(zonediff)s' % \
                {'year': m.group(1), 'month': m.group(2), 'day': m.group(3),\
                 'hour': hour, 'minute': m.group(6), 'second': m.group(7),\
                 'zonediff': '+09:00'}
    return _parse_date_w3dtf(w3dtfdate)