from django.contrib import messages
from django.db import transaction
from django.shortcuts import redirect, render as django_render
from django.utils.translation import ugettext as _

from misago.users.decorators import deny_guests
from misago.users.forms.usercp import (ChangeForumOptionsForm,
                                       ChangeUsernameForm)
from misago.users.sites import usercp
from misago.users.namechanges import UsernameChanges


def render(request, template, context=None):
    context = context or {}
    context['pages'] = usercp.get_pages(request)

    for page in context['pages']:
        if page['is_active']:
            context['active_page'] = page
            break

    return django_render(request, template, context)


@deny_guests
def change_forum_options(request):
    form = ChangeForumOptionsForm(instance=request.user)
    if request.method == 'POST':
        form = ChangeForumOptionsForm(request.POST, instance=request.user)
        if form.is_valid():
            form.save()

            message = _("Your forum options have been changed.")
            messages.success(request, message)

            return redirect('misago:usercp_change_forum_options')

    return render(request, 'misago/usercp/change_forum_options.html',
                  {'form': form})


@deny_guests
@transaction.atomic()
def change_username(request):
    namechanges = UsernameChanges(request.user)

    form = ChangeUsernameForm()
    if request.method == 'POST' and namechanges.left:
        form = ChangeUsernameForm(request.POST, user=request.user)
        if form.is_valid():
            request.user.set_username(form.cleaned_data['new_username'])
            request.user.save(update_fields=['username', 'username_slug'])

            message = _("Your username has been changed.")
            messages.success(request, message)

            return redirect('misago:usercp_change_username')

    return render(request, 'misago/usercp/change_username.html', {
            'form': form,
            'changes_left': namechanges.left,
            'next_change_on': namechanges.next_on
        })


@deny_guests
def change_email_password(request):
    return render(request, 'misago/usercp/change_email_password.html')