from django import forms
from django.core import validators
from django.core.exceptions import ValidationError
from django.utils.safestring import mark_safe
from django.contrib.auth.forms import SetPasswordForm

from humbug import settings
from zephyr.models import Realm, get_user_profile_by_email, UserProfile
from zephyr.lib.actions import do_change_password

def is_unique(value):
    try:
        get_user_profile_by_email(value)
        raise ValidationError(u'%s is already registered' % value)
    except UserProfile.DoesNotExist:
        pass

def is_inactive(value):
    try:
        if get_user_profile_by_email(value).is_active:
            raise ValidationError(u'%s is already active' % value)
    except UserProfile.DoesNotExist:
        pass

SIGNUP_STRING = '<a href="http://get.humbughq.com/">Sign up</a> to find out when Humbug is ready for you.'

def has_valid_realm(value):
    try:
        Realm.objects.get(domain=value.split("@")[-1])
    except Realm.DoesNotExist:
        raise ValidationError(mark_safe(u'Registration is not currently available for your domain. ' + SIGNUP_STRING))

def isnt_mit(value):
    if "@mit.edu" in value:
        raise ValidationError(mark_safe(u'Humbug for MIT is by invitation only. ' + SIGNUP_STRING))

class RegistrationForm(forms.Form):
    full_name = forms.CharField(max_length=100)
    password = forms.CharField(widget=forms.PasswordInput, max_length=100)
    terms = forms.BooleanField(required=True)

class ToSForm(forms.Form):
    full_name = forms.CharField(max_length=100)
    terms = forms.BooleanField(required=True)

class HomepageForm(forms.Form):
    if settings.ALLOW_REGISTER:
        email = forms.EmailField()
    else:
        validators = [has_valid_realm, isnt_mit, is_inactive]
        email = forms.EmailField(validators=validators)

class LoggingSetPasswordForm(SetPasswordForm):
    def save(self, commit=True):
        do_change_password(self.user, self.cleaned_data['new_password1'],
                           log=True, commit=commit)
        return self.user