/*
Copyright 2018 New Vector Ltd
Copyright 2019, 2020 The Matrix.org Foundation C.I.C.

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.
*/

const sendMessage = require('../usecases/send-message');
const acceptInvite = require('../usecases/accept-invite');
const { receiveMessage } = require('../usecases/timeline');
const { createDm } = require('../usecases/create-room');
const { checkRoomSettings } = require('../usecases/room-settings');
const { startSasVerification, acceptSasVerification } = require('../usecases/verify');
const { setupSecureBackup } = require('../usecases/security');
const assert = require('assert');
const { measureStart, measureStop } = require('../util');

module.exports = async function e2eEncryptionScenarios(alice, bob) {
    console.log(" creating an e2e encrypted DM and join through invite:");
    await createDm(bob, ['@alice:localhost']);
    await checkRoomSettings(bob, { encryption: true }); // for sanity, should be e2e-by-default
    await acceptInvite(alice, 'bob');
    // do sas verifcation
    bob.log.step(`starts SAS verification with ${alice.username}`);
    await measureStart(bob, "mx_VerifyE2EEUser");
    const bobSasPromise = startSasVerification(bob, alice.username);
    const aliceSasPromise = acceptSasVerification(alice, bob.username);
    // wait in parallel, so they don't deadlock on each other
    // the logs get a bit messy here, but that's fine enough for debugging (hopefully)
    const [bobSas, aliceSas] = await Promise.all([bobSasPromise, aliceSasPromise]);
    assert.deepEqual(bobSas, aliceSas);
    await measureStop(bob, "mx_VerifyE2EEUser");
    bob.log.done(`done (match for ${bobSas.join(", ")})`);
    const aliceMessage = "Guess what I just heard?!";
    await sendMessage(alice, aliceMessage);
    await receiveMessage(bob, { sender: "alice", body: aliceMessage, encrypted: true });
    const bobMessage = "You've got to tell me!";
    await sendMessage(bob, bobMessage);
    await receiveMessage(alice, { sender: "bob", body: bobMessage, encrypted: true });
    await setupSecureBackup(alice);
};
