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

from sys import maxint
from datetime import datetime, date, time
from trac.util.datefmt import utc, to_timestamp, localtz, format_time, get_timezone, timezone
from re import match, compile as re_compile

class ValidationError(ValueError):
    def __str__(self):
        return "ValidationError: value out of bounds!"

def validate_id(value):
    if (0 > value > maxint):
        raise ValidationError("invalid argument")

def make_hash():
    from random import sample
    population = '123456789ABCDEFGHIJKLMNPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'
    return "".join(sample(population, 4))

def date_parse(foo):
    groups = match("^(\d{1,2}).(\d{1,2}).(\d{4})$", foo).groups()
    return date(int(groups[2]),int(groups[1]),int(groups[0]))

def time_parse(foo):
    timeM = re_compile("^(\d{1,2}):?(\d{2})$")
    res = timeM.match(foo)
    if not res:
        raise ValueError("not valid time format")
    h,m = res.groups()
    return time(int(h),int(m))

def validate_email(addr):
    rfc822_specials = '()<>@,;:\\"[]'
    # First we validate the name portion (name@domain)
    c = 0
    while c < len(addr):
        if addr[c] == '"' and (not c or addr[c - 1] == '.' or addr[c - 1] == '"'):
            c = c + 1
            while c < len(addr):
                if addr[c] == '"':
                    break
                if addr[c] == '\\' and addr[c + 1] == ' ':
                    c = c + 2
                    continue
                if ord(addr[c]) < 32 or ord(addr[c]) >= 127:
                    return 0
                c = c + 1
            else:
                return False
            if addr[c] == '@':
                break
            if addr[c] != '.':
                return False
            c = c + 1
            continue
        if addr[c] == '@':
            break
        if ord(addr[c]) <= 32 or ord(addr[c]) >= 127:
            return False
        if addr[c] in rfc822_specials:
            return False
        c = c + 1
    if not c or addr[c - 1] == '.':
        return False
    # Next we validate the domain portion (name@domain)
    domain = c = c + 1
    if domain >= len(addr):
        return False
    count = 0
    while c < len(addr):
        if addr[c] == '.':
            if c == domain or addr[c - 1] == '.':
                return False
            count = count + 1
        if ord(addr[c]) <= 32 or ord(addr[c]) >= 127:
            return False
        if addr[c] in rfc822_specials:
            return False
        c = c + 1
    return count >= 1

def get_tz(session_tzname):
    if session_tzname == 'UTC':
        selected_tz = utc
    else:
        try:
            selected_tz = timezone(session_tzname)
        except Exception, e:
            print e
            selected_tz = utc
    return session_tzname, selected_tz

def get_option_count(a, aopt):
    aopt.count = 0
    print a, a.options
    for i in a.options:
        if i.ao_id == aopt.ao_id:
            i.name = aopt.name
            aopt.count = i.count
            return