#!/usr/bin/env python
# encoding: utf-8
# permissions controller for pylons
# Copyright (C) 2009-2010 Marcin Kuzminski <marcin@python-works.com>
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; version 2
# of the License or (at your opinion) any later version of the license.
# 
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
# 
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
# MA  02110-1301, USA.
"""
Created on April 27, 2010
permissions controller for pylons
@author: marcink
"""

from formencode import htmlfill
from pylons import request, session, tmpl_context as c, url
from pylons.controllers.util import abort, redirect
from pylons.i18n.translation import _
from rhodecode.lib import helpers as h
from rhodecode.lib.auth import LoginRequired, HasPermissionAllDecorator
from rhodecode.lib.auth_ldap import LdapImportError
from rhodecode.lib.base import BaseController, render
from rhodecode.model.forms import LdapSettingsForm, DefaultPermissionsForm
from rhodecode.model.permission import PermissionModel
from rhodecode.model.settings import SettingsModel
from rhodecode.model.user import UserModel
import formencode
import logging
import traceback

log = logging.getLogger(__name__)

class PermissionsController(BaseController):
    """REST Controller styled on the Atom Publishing Protocol"""
    # To properly map this controller, ensure your config/routing.py
    # file has a resource setup:
    #     map.resource('permission', 'permissions')

    @LoginRequired()
    @HasPermissionAllDecorator('hg.admin')
    def __before__(self):
        c.admin_user = session.get('admin_user')
        c.admin_username = session.get('admin_username')
        super(PermissionsController, self).__before__()

        self.perms_choices = [('repository.none', _('None'),),
                              ('repository.read', _('Read'),),
                              ('repository.write', _('Write'),),
                              ('repository.admin', _('Admin'),)]
        self.register_choices = [
            ('hg.register.none',
                _('disabled')),
            ('hg.register.manual_activate',
                _('allowed with manual account activation')),
            ('hg.register.auto_activate',
                _('allowed with automatic account activation')), ]

        self.create_choices = [('hg.create.none', _('Disabled')),
                               ('hg.create.repository', _('Enabled'))]


    def index(self, format='html'):
        """GET /permissions: All items in the collection"""
        # url('permissions')

    def create(self):
        """POST /permissions: Create a new item"""
        # url('permissions')

    def new(self, format='html'):
        """GET /permissions/new: Form to create a new item"""
        # url('new_permission')

    def update(self, id):
        """PUT /permissions/id: Update an existing item"""
        # Forms posted to this method should contain a hidden field:
        #    <input type="hidden" name="_method" value="PUT" />
        # Or using helpers:
        #    h.form(url('permission', id=ID),
        #           method='put')
        # url('permission', id=ID)

        permission_model = PermissionModel()

        _form = DefaultPermissionsForm([x[0] for x in self.perms_choices],
                                       [x[0] for x in self.register_choices],
                                       [x[0] for x in self.create_choices])()

        try:
            form_result = _form.to_python(dict(request.POST))
            form_result.update({'perm_user_name':id})
            permission_model.update(form_result)
            h.flash(_('Default permissions updated successfully'),
                    category='success')

        except formencode.Invalid, errors:
            c.perms_choices = self.perms_choices
            c.register_choices = self.register_choices
            c.create_choices = self.create_choices
            defaults = errors.value
            defaults.update(SettingsModel().get_ldap_settings())

            return htmlfill.render(
                render('admin/permissions/permissions.html'),
                defaults=defaults,
                errors=errors.error_dict or {},
                prefix_error=False,
                encoding="UTF-8")
        except Exception:
            log.error(traceback.format_exc())
            h.flash(_('error occured during update of permissions'),
                    category='error')

        return redirect(url('edit_permission', id=id))



    def delete(self, id):
        """DELETE /permissions/id: Delete an existing item"""
        # Forms posted to this method should contain a hidden field:
        #    <input type="hidden" name="_method" value="DELETE" />
        # Or using helpers:
        #    h.form(url('permission', id=ID),
        #           method='delete')
        # url('permission', id=ID)

    def show(self, id, format='html'):
        """GET /permissions/id: Show a specific item"""
        # url('permission', id=ID)

    def edit(self, id, format='html'):
        """GET /permissions/id/edit: Form to edit an existing item"""
        #url('edit_permission', id=ID)
        c.perms_choices = self.perms_choices
        c.register_choices = self.register_choices
        c.create_choices = self.create_choices

        if id == 'default':
            default_user = UserModel().get_by_username('default')
            defaults = {'_method':'put',
                        'anonymous':default_user.active}
            defaults.update(SettingsModel().get_ldap_settings())
            for p in default_user.user_perms:
                if p.permission.permission_name.startswith('repository.'):
                    defaults['default_perm'] = p.permission.permission_name

                if p.permission.permission_name.startswith('hg.register.'):
                    defaults['default_register'] = p.permission.permission_name

                if p.permission.permission_name.startswith('hg.create.'):
                    defaults['default_create'] = p.permission.permission_name

            return htmlfill.render(
                        render('admin/permissions/permissions.html'),
                        defaults=defaults,
                        encoding="UTF-8",
                        force_defaults=True,)
        else:
            return redirect(url('admin_home'))


    def ldap(self, id_user='default'):
        """
        POST ldap create and store ldap settings
        """

        settings_model = SettingsModel()
        _form = LdapSettingsForm()()

        try:
            form_result = _form.to_python(dict(request.POST))
            try:

                for k, v in form_result.items():
                    if k.startswith('ldap_'):
                        setting = settings_model.get(k)
                        setting.app_settings_value = v
                        self.sa.add(setting)

                self.sa.commit()
                h.flash(_('Ldap settings updated successfully'),
                    category='success')
            except:
                raise
        except LdapImportError:
            h.flash(_('Unable to activate ldap. The "ldap-python" library '
                      'is missing.'),
                    category='warning')

        except formencode.Invalid, errors:
            c.perms_choices = self.perms_choices
            c.register_choices = self.register_choices
            c.create_choices = self.create_choices

            return htmlfill.render(
                render('admin/permissions/permissions.html'),
                defaults=errors.value,
                errors=errors.error_dict or {},
                prefix_error=False,
                encoding="UTF-8")
        except Exception:
            log.error(traceback.format_exc())
            h.flash(_('error occured during update of ldap settings'),
                    category='error')

        return redirect(url('edit_permission', id=id_user))