"""Basic User Forms"""
from django import forms
from django.contrib.auth import get_user_model
from django.utils.translation import ugettext_lazy as _


class UserCreationForm(forms.ModelForm):
    """
    A form for creating new users.
    Includes all the required fields, plus a repeated password.
    """

    error_messages = {
        'duplicate_email': _("A user with that email already exists."),
        'password_mismatch': _("The two password fields didn't match."),
    }

    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."))

    class Meta:
        """Meta class properties"""
        model = get_user_model()
        fields = ('email',)

    def clean_email(self):
        """ Clean form email.
        :return str email: cleaned email
        :raise forms.ValidationError: Email is duplicated
        """
        # Since User.email is unique, this check is redundant,
        # but it sets a nicer error message than the ORM. See #13147.
        email = self.cleaned_data["email"]
        try:
            get_user_model()._default_manager.get(email=email)
        except get_user_model().DoesNotExist:
            return email
        raise forms.ValidationError(
            self.error_messages['duplicate_email'],
            code='duplicate_email',
        )

    def clean_password2(self):
        """ Check that the two password entries match.
        :return str password2: cleaned password2
        :raise forms.ValidationError: password2 != password1
        """
        password1 = self.cleaned_data.get("password1")
        password2 = self.cleaned_data.get("password2")
        if password1 and password2 and password1 != password2:
            raise forms.ValidationError(
                self.error_messages['password_mismatch'],
                code='password_mismatch',
            )
        return password2

    def save(self, commit=True):
        """ Save user.
        Save the provided password in hashed format.
        :return custom_user.models.EmailUser: user
        """
        user = super(UserCreationForm, self).save(commit=False)
        user.set_password(self.cleaned_data["password1"])
        if commit:
            user.save()
        return user


