# -*- coding: utf-8 -*-
# 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, either version 3 of the License, or
# (at your option) any later version.
#
# 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, see <http://www.gnu.org/licenses/>.
"""
kallithea.controllers.admin.users
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Users crud controller

This file was forked by the Kallithea project in July 2014.
Original author and date, and relevant copyright and licensing information is below:
:created_on: Apr 4, 2010
:author: marcink
:copyright: (c) 2013 RhodeCode GmbH, and others.
:license: GPLv3, see LICENSE.md for more details.
"""

import logging
import traceback

import formencode
from formencode import htmlfill
from sqlalchemy.sql.expression import func
from tg import app_globals, config, request
from tg import tmpl_context as c
from tg.i18n import ugettext as _
from webob.exc import HTTPFound, HTTPNotFound

import kallithea
from kallithea.config.routing import url
from kallithea.lib import auth_modules
from kallithea.lib import helpers as h
from kallithea.lib.auth import AuthUser, HasPermissionAnyDecorator, LoginRequired
from kallithea.lib.base import BaseController, IfSshEnabled, render
from kallithea.lib.exceptions import DefaultUserException, UserCreationError, UserOwnsReposException
from kallithea.lib.utils import action_logger
from kallithea.lib.utils2 import datetime_to_time, generate_api_key, safe_int
from kallithea.model.api_key import ApiKeyModel
from kallithea.model.db import User, UserEmailMap, UserIpMap, UserToPerm
from kallithea.model.forms import CustomDefaultPermissionsForm, UserForm
from kallithea.model.meta import Session
from kallithea.model.ssh_key import SshKeyModel, SshKeyModelException
from kallithea.model.user import UserModel


log = logging.getLogger(__name__)


class UsersController(BaseController):
    """REST Controller styled on the Atom Publishing Protocol"""

    @LoginRequired()
    @HasPermissionAnyDecorator('hg.admin')
    def _before(self, *args, **kwargs):
        super(UsersController, self)._before(*args, **kwargs)
        c.available_permissions = config['available_permissions']

    def index(self, format='html'):
        c.users_list = User.query().order_by(User.username) \
                        .filter_by(is_default_user=False) \
                        .order_by(func.lower(User.username)) \
                        .all()

        users_data = []
        total_records = len(c.users_list)
        _tmpl_lookup = app_globals.mako_lookup
        template = _tmpl_lookup.get_template('data_table/_dt_elements.html')

        grav_tmpl = '<div class="gravatar">%s</div>'

        username = lambda user_id, username: (
                template.get_def("user_name")
                .render(user_id, username, _=_, h=h, c=c))

        user_actions = lambda user_id, username: (
                template.get_def("user_actions")
                .render(user_id, username, _=_, h=h, c=c))

        for user in c.users_list:
            users_data.append({
                "gravatar": grav_tmpl % h.gravatar(user.email, size=20),
                "raw_name": user.username,
                "username": username(user.user_id, user.username),
                "firstname": h.escape(user.name),
                "lastname": h.escape(user.lastname),
                "last_login": h.fmt_date(user.last_login),
                "last_login_raw": datetime_to_time(user.last_login),
                "active": h.boolicon(user.active),
                "admin": h.boolicon(user.admin),
                "extern_type": user.extern_type,
                "extern_name": user.extern_name,
                "action": user_actions(user.user_id, user.username),
            })

        c.data = {
            "sort": None,
            "dir": "asc",
            "records": users_data
        }

        return render('admin/users/users.html')

    def create(self):
        c.default_extern_type = User.DEFAULT_AUTH_TYPE
        c.default_extern_name = ''
        user_model = UserModel()
        user_form = UserForm()()
        try:
            form_result = user_form.to_python(dict(request.POST))
            user = user_model.create(form_result)
            action_logger(request.authuser, 'admin_created_user:%s' % user.username,
                          None, request.ip_addr)
            h.flash(_('Created user %s') % user.username,
                    category='success')
            Session().commit()
        except formencode.Invalid as errors:
            return htmlfill.render(
                render('admin/users/user_add.html'),
                defaults=errors.value,
                errors=errors.error_dict or {},
                prefix_error=False,
                encoding="UTF-8",
                force_defaults=False)
        except UserCreationError as e:
            h.flash(e, 'error')
        except Exception:
            log.error(traceback.format_exc())
            h.flash(_('Error occurred during creation of user %s')
                    % request.POST.get('username'), category='error')
        raise HTTPFound(location=url('edit_user', id=user.user_id))

    def new(self, format='html'):
        c.default_extern_type = User.DEFAULT_AUTH_TYPE
        c.default_extern_name = ''
        return render('admin/users/user_add.html')

    def update(self, id):
        user_model = UserModel()
        user = user_model.get(id)
        _form = UserForm(edit=True, old_data={'user_id': id,
                                              'email': user.email})()
        form_result = {}
        try:
            form_result = _form.to_python(dict(request.POST))
            skip_attrs = ['extern_type', 'extern_name',
                         ] + auth_modules.get_managed_fields(user)

            user_model.update(id, form_result, skip_attrs=skip_attrs)
            usr = form_result['username']
            action_logger(request.authuser, 'admin_updated_user:%s' % usr,
                          None, request.ip_addr)
            h.flash(_('User updated successfully'), category='success')
            Session().commit()
        except formencode.Invalid as errors:
            defaults = errors.value
            e = errors.error_dict or {}
            defaults.update({
                'create_repo_perm': user_model.has_perm(id,
                                                        'hg.create.repository'),
                'fork_repo_perm': user_model.has_perm(id, 'hg.fork.repository'),
            })
            return htmlfill.render(
                self._render_edit_profile(user),
                defaults=defaults,
                errors=e,
                prefix_error=False,
                encoding="UTF-8",
                force_defaults=False)
        except Exception:
            log.error(traceback.format_exc())
            h.flash(_('Error occurred during update of user %s')
                    % form_result.get('username'), category='error')
        raise HTTPFound(location=url('edit_user', id=id))

    def delete(self, id):
        usr = User.get_or_404(id)
        try:
            UserModel().delete(usr)
            Session().commit()
            h.flash(_('Successfully deleted user'), category='success')
        except (UserOwnsReposException, DefaultUserException) as e:
            h.flash(e, category='warning')
        except Exception:
            log.error(traceback.format_exc())
            h.flash(_('An error occurred during deletion of user'),
                    category='error')
        raise HTTPFound(location=url('users'))

    def _get_user_or_raise_if_default(self, id):
        try:
            return User.get_or_404(id, allow_default=False)
        except DefaultUserException:
            h.flash(_("The default user cannot be edited"), category='warning')
            raise HTTPNotFound

    def _render_edit_profile(self, user):
        c.user = user
        c.active = 'profile'
        c.perm_user = AuthUser(dbuser=user)
        managed_fields = auth_modules.get_managed_fields(user)
        c.readonly = lambda n: 'readonly' if n in managed_fields else None
        return render('admin/users/user_edit.html')

    def edit(self, id, format='html'):
        user = self._get_user_or_raise_if_default(id)
        defaults = user.get_dict()

        return htmlfill.render(
            self._render_edit_profile(user),
            defaults=defaults,
            encoding="UTF-8",
            force_defaults=False)

    def edit_advanced(self, id):
        c.user = self._get_user_or_raise_if_default(id)
        c.active = 'advanced'
        c.perm_user = AuthUser(dbuser=c.user)

        umodel = UserModel()
        defaults = c.user.get_dict()
        defaults.update({
            'create_repo_perm': umodel.has_perm(c.user, 'hg.create.repository'),
            'create_user_group_perm': umodel.has_perm(c.user,
                                                      'hg.usergroup.create.true'),
            'fork_repo_perm': umodel.has_perm(c.user, 'hg.fork.repository'),
        })
        return htmlfill.render(
            render('admin/users/user_edit.html'),
            defaults=defaults,
            encoding="UTF-8",
            force_defaults=False)

    def edit_api_keys(self, id):
        c.user = self._get_user_or_raise_if_default(id)
        c.active = 'api_keys'
        show_expired = True
        c.lifetime_values = [
            (str(-1), _('Forever')),
            (str(5), _('5 minutes')),
            (str(60), _('1 hour')),
            (str(60 * 24), _('1 day')),
            (str(60 * 24 * 30), _('1 month')),
        ]
        c.lifetime_options = [(c.lifetime_values, _("Lifetime"))]
        c.user_api_keys = ApiKeyModel().get_api_keys(c.user.user_id,
                                                     show_expired=show_expired)
        defaults = c.user.get_dict()
        return htmlfill.render(
            render('admin/users/user_edit.html'),
            defaults=defaults,
            encoding="UTF-8",
            force_defaults=False)

    def add_api_key(self, id):
        c.user = self._get_user_or_raise_if_default(id)

        lifetime = safe_int(request.POST.get('lifetime'), -1)
        description = request.POST.get('description')
        ApiKeyModel().create(c.user.user_id, description, lifetime)
        Session().commit()
        h.flash(_("API key successfully created"), category='success')
        raise HTTPFound(location=url('edit_user_api_keys', id=c.user.user_id))

    def delete_api_key(self, id):
        c.user = self._get_user_or_raise_if_default(id)

        api_key = request.POST.get('del_api_key')
        if request.POST.get('del_api_key_builtin'):
            c.user.api_key = generate_api_key()
            Session().commit()
            h.flash(_("API key successfully reset"), category='success')
        elif api_key:
            ApiKeyModel().delete(api_key, c.user.user_id)
            Session().commit()
            h.flash(_("API key successfully deleted"), category='success')

        raise HTTPFound(location=url('edit_user_api_keys', id=c.user.user_id))

    def update_account(self, id):
        pass

    def edit_perms(self, id):
        c.user = self._get_user_or_raise_if_default(id)
        c.active = 'perms'
        c.perm_user = AuthUser(dbuser=c.user)

        umodel = UserModel()
        defaults = c.user.get_dict()
        defaults.update({
            'create_repo_perm': umodel.has_perm(c.user, 'hg.create.repository'),
            'create_user_group_perm': umodel.has_perm(c.user,
                                                      'hg.usergroup.create.true'),
            'fork_repo_perm': umodel.has_perm(c.user, 'hg.fork.repository'),
        })
        return htmlfill.render(
            render('admin/users/user_edit.html'),
            defaults=defaults,
            encoding="UTF-8",
            force_defaults=False)

    def update_perms(self, id):
        user = self._get_user_or_raise_if_default(id)

        try:
            form = CustomDefaultPermissionsForm()()
            form_result = form.to_python(request.POST)

            user_model = UserModel()

            defs = UserToPerm.query() \
                .filter(UserToPerm.user == user) \
                .all()
            for ug in defs:
                Session().delete(ug)

            if form_result['create_repo_perm']:
                user_model.grant_perm(id, 'hg.create.repository')
            else:
                user_model.grant_perm(id, 'hg.create.none')
            if form_result['create_user_group_perm']:
                user_model.grant_perm(id, 'hg.usergroup.create.true')
            else:
                user_model.grant_perm(id, 'hg.usergroup.create.false')
            if form_result['fork_repo_perm']:
                user_model.grant_perm(id, 'hg.fork.repository')
            else:
                user_model.grant_perm(id, 'hg.fork.none')
            h.flash(_("Updated permissions"), category='success')
            Session().commit()
        except Exception:
            log.error(traceback.format_exc())
            h.flash(_('An error occurred during permissions saving'),
                    category='error')
        raise HTTPFound(location=url('edit_user_perms', id=id))

    def edit_emails(self, id):
        c.user = self._get_user_or_raise_if_default(id)
        c.active = 'emails'
        c.user_email_map = UserEmailMap.query() \
            .filter(UserEmailMap.user == c.user).all()

        defaults = c.user.get_dict()
        return htmlfill.render(
            render('admin/users/user_edit.html'),
            defaults=defaults,
            encoding="UTF-8",
            force_defaults=False)

    def add_email(self, id):
        user = self._get_user_or_raise_if_default(id)
        email = request.POST.get('new_email')
        user_model = UserModel()

        try:
            user_model.add_extra_email(id, email)
            Session().commit()
            h.flash(_("Added email %s to user") % email, category='success')
        except formencode.Invalid as error:
            msg = error.error_dict['email']
            h.flash(msg, category='error')
        except Exception:
            log.error(traceback.format_exc())
            h.flash(_('An error occurred during email saving'),
                    category='error')
        raise HTTPFound(location=url('edit_user_emails', id=id))

    def delete_email(self, id):
        user = self._get_user_or_raise_if_default(id)
        email_id = request.POST.get('del_email_id')
        user_model = UserModel()
        user_model.delete_extra_email(id, email_id)
        Session().commit()
        h.flash(_("Removed email from user"), category='success')
        raise HTTPFound(location=url('edit_user_emails', id=id))

    def edit_ips(self, id):
        c.user = self._get_user_or_raise_if_default(id)
        c.active = 'ips'
        c.user_ip_map = UserIpMap.query() \
            .filter(UserIpMap.user == c.user).all()

        c.default_user_ip_map = UserIpMap.query() \
            .filter(UserIpMap.user == User.get_default_user()).all()

        defaults = c.user.get_dict()
        return htmlfill.render(
            render('admin/users/user_edit.html'),
            defaults=defaults,
            encoding="UTF-8",
            force_defaults=False)

    def add_ip(self, id):
        ip = request.POST.get('new_ip')
        user_model = UserModel()

        try:
            user_model.add_extra_ip(id, ip)
            Session().commit()
            h.flash(_("Added IP address %s to user whitelist") % ip, category='success')
        except formencode.Invalid as error:
            msg = error.error_dict['ip']
            h.flash(msg, category='error')
        except Exception:
            log.error(traceback.format_exc())
            h.flash(_('An error occurred while adding IP address'),
                    category='error')

        if 'default_user' in request.POST:
            raise HTTPFound(location=url('admin_permissions_ips'))
        raise HTTPFound(location=url('edit_user_ips', id=id))

    def delete_ip(self, id):
        ip_id = request.POST.get('del_ip_id')
        user_model = UserModel()
        user_model.delete_extra_ip(id, ip_id)
        Session().commit()
        h.flash(_("Removed IP address from user whitelist"), category='success')

        if 'default_user' in request.POST:
            raise HTTPFound(location=url('admin_permissions_ips'))
        raise HTTPFound(location=url('edit_user_ips', id=id))

    @IfSshEnabled
    def edit_ssh_keys(self, id):
        c.user = self._get_user_or_raise_if_default(id)
        c.active = 'ssh_keys'
        c.user_ssh_keys = SshKeyModel().get_ssh_keys(c.user.user_id)
        defaults = c.user.get_dict()
        return htmlfill.render(
            render('admin/users/user_edit.html'),
            defaults=defaults,
            encoding="UTF-8",
            force_defaults=False)

    @IfSshEnabled
    def ssh_keys_add(self, id):
        c.user = self._get_user_or_raise_if_default(id)

        description = request.POST.get('description')
        public_key = request.POST.get('public_key')
        try:
            new_ssh_key = SshKeyModel().create(c.user.user_id,
                                               description, public_key)
            Session().commit()
            SshKeyModel().write_authorized_keys()
            h.flash(_("SSH key %s successfully added") % new_ssh_key.fingerprint, category='success')
        except SshKeyModelException as errors:
            h.flash(errors.message, category='error')
        raise HTTPFound(location=url('edit_user_ssh_keys', id=c.user.user_id))

    @IfSshEnabled
    def ssh_keys_delete(self, id):
        c.user = self._get_user_or_raise_if_default(id)

        fingerprint = request.POST.get('del_public_key_fingerprint')
        try:
            SshKeyModel().delete(fingerprint, c.user.user_id)
            Session().commit()
            SshKeyModel().write_authorized_keys()
            h.flash(_("SSH key successfully deleted"), category='success')
        except SshKeyModelException as errors:
            h.flash(errors.message, category='error')
        raise HTTPFound(location=url('edit_user_ssh_keys', id=c.user.user_id))
