# Copyright (C) 2018  Lars Wirzenius
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero 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 Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.


import os
import urllib.parse


import bottle


import qvisqve
import qvisqve_secrets


class ManagementRouter(qvisqve.Router):

    def __init__(self, storedir, baseurl):
        super().__init__()
        rs = qvisqve.FileStore(storedir)
        self._clients = qvisqve.ClientManager(rs)
        self._users = qvisqve.UserManager(rs)
        self._apps = qvisqve.ApplicationManager(rs)
        self._baseurl = baseurl

    def get_routes(self):
        clients = ManagementEndpoint(self._baseurl, '/clients', self._clients)
        users = ManagementEndpoint(self._baseurl, '/users', self._users)
        apps = ManagementEndpoint(self._baseurl, '/applications', self._apps)

        return clients.get_routes() + users.get_routes() + apps.get_routes()


class ManagementEndpoint:

    def __init__(self, baseurl, path, entities):
        self._baseurl = baseurl
        self._path = path
        self._entities = entities

    def get_routes(self):
        return [
            {
                'method': 'POST',
                'path': self._path,
                'callback': self._create,
            },
            {
                'method': 'GET',
                'path': self._path,
                'callback': self._list,
            },
            {
                'method': 'GET',
                'path': '{}/<id>'.format(self._path),
                'callback': self._show,
            },
            {
                'method': 'PUT',
                'path': '{}/<id>'.format(self._path),
                'callback': self._update,
            },
            {
                'method': 'PUT',
                'path': '{}/<id>/secret'.format(self._path),
                'callback': self._set_secret,
            },
            {
                'method': 'DELETE',
                'path': '{}/<id>'.format(self._path),
                'callback': self._delete,
            },
        ]

    def _create(self, content_type, body, **kwargs):
        qvisqve.log.log('info', msg_text='Creating', path=self._path)

        entity_id = body.get('id')
        if not entity_id:
            return qvisqve.bad_request_response(
                'No {}'.format(self._entity_id_name))

        self._entities.create(entity_id, body)

        entity = self._entities.get(entity_id)
        location = '{}{}/{}'.format(self._baseurl, self._path, entity_id)
        return qvisqve.created_response(entity, location)

    def _update(self, content_type, body, **kwargs):
        qvisqve.log.log('info', msg_text='Updating', path=self._path)

        entity_id = kwargs['id']
        try:
            entity = self._entities.get(entity_id)
        except qvisqve.ResourceDoesNotExist as e:
            return qvisqve.not_found_response()

        self._entities.create(entity_id, body)

        entity = self._entities.get(entity_id)
        return qvisqve.ok_response(entity)

    def _list(self, content_type, body, **kwargs):
        qvisqve.log.log('info', msg_text='Listing', path=self._path)
        entity_ids = list(self._entities.list())
        return qvisqve.ok_response({"resources": entity_ids})

    def _show(self, content_type, body, **kwargs):
        qvisqve.log.log('info', msg_text='Showing client')

        entity_id = kwargs['id']
        try:
            entity = self._entities.get(entity_id)
        except qvisqve.ResourceDoesNotExist as e:
            return qvisqve.not_found_response()

        qvisqve.log.log('info', msg_text='Showing', entity=entity)
        return qvisqve.ok_response(entity)

    def _set_secret(self, content_type, body, **kwargs):
        qvisqve.log.log('info', msg_text='Setting client secret')

        entity_id = kwargs['id']
        try:
            entity = self._entities.get(entity_id)
        except qvisqve.ResourceDoesNotExist as e:
            return qvisqve.not_found_response()

        secret = body.get('secret')
        if not secret:
            return qvisqve.bad_request_response('No secret')

        self._entities.set_secret(entity_id, secret)
        return qvisqve.ok_response(entity)

    def _delete(self, content_type, body, **kwargs):
        qvisqve.log.log('info', msg_text='Deleting', path=self._path)

        entity_id = kwargs['id']
        self._entities.delete(entity_id)
        return qvisqve.ok_response('')