from django.contrib.auth import update_session_auth_hash
from django.core.urlresolvers import reverse
from django.db import IntegrityError
from django.shortcuts import render
from django.utils.translation import ugettext as _

from ..credentialchange import read_new_credential
from ..decorators import deny_guests
from ..pages import usercp


@deny_guests
def index(request, *args, **kwargs):
    user_options = []
    for section in usercp.get_sections(request):
        user_options.append({
            'name': unicode(section['name']),
            'icon': section['icon'],
            'component': section['component'],
        })

    request.frontend_context.update({
        'USER_OPTIONS': user_options
    });

    return render(request, 'misago/options/noscript.html')


class ChangeError(Exception):
    pass


def confirm_change_view(f):
    @deny_guests
    def decorator(request, token):
        try:
            return f(request, token)
        except ChangeError as e:
            return render(request, 'misago/options/credentials_error.html',
                status=400)
    return decorator


@confirm_change_view
def confirm_email_change(request, token):
    new_credential = read_new_credential(request, 'email', token)
    if not new_credential:
        raise ChangeError()

    try:
        request.user.set_email(new_credential)
        request.user.save(update_fields=['email', 'email_hash'])
    except IntegrityError:
        raise ChangeError()

    message = _("%(user)s, your e-mail has been changed.")
    return render(request, 'misago/options/credentials_changed.html', {
            'message': message % {'user': request.user.username},
        })


@confirm_change_view
def confirm_password_change(request, token):
    new_credential = read_new_credential(request, 'password', token)
    if not new_credential:
        raise ChangeError()

    request.user.set_password(new_credential)
    update_session_auth_hash(request, request.user)
    request.user.save(update_fields=['password'])

    message = _("%(user)s, your password has been changed.")
    return render(request, 'misago/options/credentials_changed.html', {
            'message': message % {'user': request.user.username},
        })