# -*- coding: utf-8 -*-
# Copyright 2018 New Vector
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

import os

from synapse.api.urls import ConsentURIBuilder
from synapse.rest.client.v1 import admin, login, room
from synapse.rest.consent import consent_resource

from tests import unittest
from tests.server import render

try:
    from synapse.push.mailer import load_jinja2_templates
except Exception:
    load_jinja2_templates = None


class ConsentResourceTestCase(unittest.HomeserverTestCase):
    skip = "No Jinja installed" if not load_jinja2_templates else None
    servlets = [
        admin.register_servlets,
        room.register_servlets,
        login.register_servlets,
    ]
    user_id = True
    hijack_auth = False

    def make_homeserver(self, reactor, clock):

        config = self.default_config()
        config.user_consent_version = "1"
        config.public_baseurl = ""
        config.form_secret = "123abc"

        # Make some temporary templates...
        temp_consent_path = self.mktemp()
        os.mkdir(temp_consent_path)
        os.mkdir(os.path.join(temp_consent_path, 'en'))
        config.user_consent_template_dir = os.path.abspath(temp_consent_path)

        with open(os.path.join(temp_consent_path, "en/1.html"), 'w') as f:
            f.write("{{version}},{{has_consented}}")

        with open(os.path.join(temp_consent_path, "en/success.html"), 'w') as f:
            f.write("yay!")

        hs = self.setup_test_homeserver(config=config)
        return hs

    def test_render_public_consent(self):
        """You can observe the terms form without specifying a user"""
        resource = consent_resource.ConsentResource(self.hs)
        request, channel = self.make_request("GET", "/consent?v=1", shorthand=False)
        render(request, resource, self.reactor)
        self.assertEqual(channel.code, 200)

    def test_accept_consent(self):
        """
        A user can use the consent form to accept the terms.
        """
        uri_builder = ConsentURIBuilder(self.hs.config)
        resource = consent_resource.ConsentResource(self.hs)

        # Register a user
        user_id = self.register_user("user", "pass")
        access_token = self.login("user", "pass")

        # Fetch the consent page, to get the consent version
        consent_uri = (
            uri_builder.build_user_consent_uri(user_id).replace("_matrix/", "")
            + "&u=user"
        )
        request, channel = self.make_request(
            "GET", consent_uri, access_token=access_token, shorthand=False
        )
        render(request, resource, self.reactor)
        self.assertEqual(channel.code, 200)

        # Get the version from the body, and whether we've consented
        version, consented = channel.result["body"].decode('ascii').split(",")
        self.assertEqual(consented, "False")

        # POST to the consent page, saying we've agreed
        request, channel = self.make_request(
            "POST",
            consent_uri + "&v=" + version,
            access_token=access_token,
            shorthand=False,
        )
        render(request, resource, self.reactor)
        self.assertEqual(channel.code, 200)

        # Fetch the consent page, to get the consent version -- it should have
        # changed
        request, channel = self.make_request(
            "GET", consent_uri, access_token=access_token, shorthand=False
        )
        render(request, resource, self.reactor)
        self.assertEqual(channel.code, 200)

        # Get the version from the body, and check that it's the version we
        # agreed to, and that we've consented to it.
        version, consented = channel.result["body"].decode('ascii').split(",")
        self.assertEqual(consented, "True")
        self.assertEqual(version, "1")