# -*- coding: utf-8 -*-
from __future__ import absolute_import

from flask import Blueprint
from flask import current_app, redirect, request, g, flash, url_for
from uuid import uuid4
from werkzeug.exceptions import Forbidden

from accounts.utils import templated, send_register_confirmation_mail, send_mail
from accounts.forms import AdminCreateAccountForm, AdminDisableAccountForm


bp = Blueprint('admin', __name__)


@bp.before_request
def restrict_bp_to_admins():
    if not g.user:
        raise Forbidden(u'Bitte einloggen!')
    if g.user.uid not in current_app.config.get('ADMIN_USERS', []):
        raise Forbidden(u'Du bist kein Admin.')


@bp.route('/')
@templated('admin/index.html')
def index():
    return {}


@bp.route('/create_account', methods=['GET', 'POST'])
@templated('admin/create_account.html')
def create_account():
    form = AdminCreateAccountForm()
    if request.method == 'POST' and form.validate():
        send_register_confirmation_mail(form.username.data, form.mail.data)

        flash(u'Mail versandt.', 'success')
        return redirect(url_for('admin.index'))
    return {'form': form}


@bp.route('/view_blacklist')
@bp.route('/view_blacklist/<start>')
@templated('admin/view_blacklist.html')
def view_blacklist(start=''):
    entries = current_app.username_blacklist
    if start:
        entries = [e for e in entries if e.startswith(start)]

    next_letters = set(e[len(start)] for e in entries if len(e) > len(start))

    return {
        'entries': entries,
        'start': start,
        'next_letters': next_letters,
    }


@bp.route('/disable_account', methods=['GET', 'POST'])
@templated('admin/disable_account.html')
def disable_account():
    form = AdminDisableAccountForm()
    if 'uid' in request.args:
        form = AdminDisableAccountForm(username=request.args['uid'])
    if request.method == 'POST' and form.validate():
        random_pw = str(uuid4())
        form.user.change_password(random_pw)
        for service in current_app.all_services:
            form.user.reset_password(service.id)

        oldmail = form.user.attributes['mail']
        mail = current_app.config['DISABLED_ACCOUNT_MAILADDRESS_TEMPLATE'] % form.user.uid
        form.user.change_email(mail)

        g.ldap.update(form.user, as_admin=True)

        flash(u'Passwort auf ein zufälliges und Mailadresse auf %s '
              u'gesetzt.' % mail, 'success')

        if current_app.config.get('MAIL_REGISTER_NOTIFY'):
            send_mail(
                current_app.config['MAIL_REGISTER_NOTIFY'],
                u'[accounts] Benutzer %s deaktiviert' % form.user.uid,
                'Benutzername: %s\nE-Mail war:   %s\n\ndurch:        %s\n' % \
                (form.user.uid, oldmail, session['username'])
            )

        return redirect(url_for('admin.index'))

    return {'form': form}