from django import forms
from django.utils.translation import gettext_lazy as _

MAX_PASSWORD_LENGTH = 256  # Active Directory's limit


def _password_field():
    return forms.CharField(
        max_length=MAX_PASSWORD_LENGTH,
        strip=False,  # spaces can be part of a password
        widget=forms.PasswordInput(render_value=False),
        error_messages={
            "required": _("Please fill in this field."),
            "max_length": _("This password is too long."),
        },
    )


class PasswordChangeForm(forms.Form):
    current_password = _password_field()
    new_password = _password_field()
    confirm_password = _password_field()

    def clean(self):
        data = super().clean()
        current, new, confirm = (
            data.get("current_password"),
            data.get("new_password"),
            data.get("confirm_password"),
        )
        if new and confirm and new != confirm:
            self.add_error("confirm_password", _("The two new passwords are not the same."))
        elif new and current and new == current:
            self.add_error("new_password", _("The new password must be different."))
        return data