import datetime
import hashlib
import subprocess

from django import forms
from django.conf import settings
from django.contrib.auth.models import User
from django.contrib.auth.forms import PasswordResetForm
from django.contrib.sites.models import Site
from django.utils.translation import ugettext, ugettext_lazy as _

from ietf.utils.mail import send_mail
from ietf.utils import debug
#from ietf.person.models import Person, Email


class RegistrationForm(forms.Form):

    email = forms.EmailField(label="Your email")
    realm = 'IETF'
    expire = 3

    def save(self, *args, **kwargs):
        # why is there a save when it doesn't save?
        self.send_email()
        return True

    def send_email(self):
        domain = Site.objects.get_current().domain
        subject = 'Confirm registration at %s' % domain
        from_email = settings.DEFAULT_FROM_EMAIL
        to_email = self.cleaned_data['email']
        today = datetime.date.today().strftime('%Y%m%d')
        auth = hashlib.md5('%s%s%s%s' % (settings.SECRET_KEY, today, to_email, self.realm)).hexdigest()
        context = {
            'domain': domain,
            'today': today,
            'realm': self.realm,
            'auth': auth,
            'username': to_email,
            'expire': settings.DAYS_TO_EXPIRE_REGISTRATION_LINK,
        }
        send_mail(self.request, to_email, from_email, subject, 'registration/creation_email.txt', context)

    def clean_email(self):
        email = self.cleaned_data.get('email', '')
        if not email:
            return email
#         if User.objects.filter(username=email).count():
#             raise forms.ValidationError(_('Email already in use'))
        return email


class RecoverPasswordForm(RegistrationForm):

    realm = 'IETF'

    def send_email(self):
        domain = Site.objects.get_current().domain
        subject = 'Password reset at %s' % domain
        from_email = settings.DEFAULT_FROM_EMAIL
        today = datetime.date.today().strftime('%Y%m%d')
        to_email = self.cleaned_data['email']
        today = datetime.date.today().strftime('%Y%m%d')
        auth = hashlib.md5('%s%s%s%s' % (settings.SECRET_KEY, today, to_email, self.realm)).hexdigest()
        context = {
            'domain': domain,
            'today': today,
            'realm': self.realm,
            'auth': auth,
            'username': to_email,
            'expire': settings.DAYS_TO_EXPIRE_REGISTRATION_LINK,
        }
        send_mail(self.request, to_email, from_email, subject, 'registration/password_reset_email.txt', context)


class PasswordForm(forms.Form):

    password1 = forms.CharField(label=_("Password"), widget=forms.PasswordInput)
    password2 = forms.CharField(label=_("Password confirmation"), widget=forms.PasswordInput,
        help_text=_("Enter the same password as above, for verification."))

    def __init__(self, *args, **kwargs):
        self.username = kwargs.pop('username')
        self.update_user = kwargs.pop('update_user', False)
        super(PasswordForm, self).__init__(*args, **kwargs)

    def clean_password2(self):
        password1 = self.cleaned_data.get("password1", "")
        password2 = self.cleaned_data["password2"]
        if password1 != password2:
            raise forms.ValidationError(_("The two password fields didn't match."))
        return password2

    def get_password(self):
        return self.cleaned_data.get('password1')

    def create_user(self):
#         user = User.objects.create(username=self.username,
#                                    email=self.username)
#         person = Person.objects.create(user=user,
#                                        name=self.username,
#                                        ascii=self.username)
#         Email.objects.create(person=person,
#                              address=self.username)
#         return user
        return None

    def get_user(self):
        return User.objects.get(username=self.username)

    @debug.trace
    def save(self):
#         if self.update_user:
#             user = self.get_user()
#         else:
#             user = self.create_user()
#         user.set_password(self.get_password())
#         user.save()
#         return user
        debug.show("[settings.HTPASSWD_COMMAND, settings.HTPASSWD_FILE, self.username, self.get_password()]")
        p = subprocess.Popen([settings.HTPASSWD_COMMAND, "-b", settings.HTPASSWD_FILE, self.username, self.get_password()], stdout=subprocess.PIPE, stderr=subprocess.PIPE)
        stdout, stderr = p.communicate()
        debug.show('stdout')
        debug.show('stderr')        
        return p.returncode

class TestEmailForm(forms.Form):
    email = forms.EmailField(required=False)