# -*- coding: utf-8 -*-

import datetime
from django.contrib.auth.decorators import user_passes_test

staff_member_required = user_passes_test(lambda u: u.is_staff)

def histogram(seznam):
	d = {}
	for i in seznam:
		if i not in d:
			d[i] = 0
		d[i] += 1
	return d


roman_numerals = zip((1000, 900,  500, 400, 100,  90, 50,  40, 10,  9,   5,  4,   1),
					 ('M',  'CM', 'D', 'CD','C', 'XC','L','XL','X','IX','V','IV','I'))

def roman(num):
	res = ""
	for i, n in roman_numerals:
		res += n * (num // i)
		num %= i
	return res

def from_roman(rom):
	if not rom:
		return 0
	for i, n in roman_numerals:
		if rom.upper().startswith(n):
			return i + from_roman(rom[len(n):])
	raise Exception('Invalid roman numeral: "%s"', rom)


def seznam_problemu():
	from .models import Problem, Resitel, Rocnik, Reseni, Cislo
	problemy = []

	# Pomocna fce k formatovani problemovych hlasek
	def prb(cls, msg, objs=None):
		s = u'<b>%s:</b> %s' % (cls.__name__, msg)
		if objs:
			s += u' ['
			for o in objs:
				try:
					url = o.admin_url()
				except:
					url = None
				if url:
					s += u'<a href="%s">%s</a>, ' % (url, o.pk, )
				else:
					s += u'%s, ' % (o.pk, )
			s = s[:-2] + u']'
		problemy.append(s)

	# Duplicita jmen
	jmena = {}
	for r in Resitel.objects.all():
		j = r.plne_jmeno()
		if j not in jmena:
			jmena[j] = []
		jmena[j].append(r)
	for j in jmena:
		if len(jmena[j]) > 1:
			prb(Resitel, u'Duplicitní jméno "%s"' % (j, ), jmena[j])

	# Data maturity a narození
	for r in Resitel.objects.all():
		if not r.rok_maturity:
			prb(Resitel, u'Neznámý rok maturity', [r])
		if r.rok_maturity and (r.rok_maturity < 1990 or r.rok_maturity > datetime.date.today().year + 10):
			prb(Resitel, u'Podezřelé datum maturity', [r])
		if r.datum_narozeni and (r.datum_narozeni.year < 1970 or r.datum_narozeni.year > datetime.date.today().year - 12):
			prb(Resitel, u'Podezřelé datum narození', [r])
#        if not r.email:
#            prb(Resitel, u'Neznámý email', [r])

	return problemy