// Copyright 2024 Signal Messenger, LLC
// SPDX-License-Identifier: AGPL-3.0-only
import { CallLinkRootKey } from '@signalapp/ringrtc';
import { Aci } from '@signalapp/libsignal-client';
import type { CallLinkAuthCredentialPresentation } from './zkgroup';
import {
  CallLinkAuthCredential,
  CallLinkSecretParams,
  GenericServerPublicParams,
} from './zkgroup';
import { getCheckedCallLinkAuthCredentialsForToday } from '../services/groupCredentialFetcher';
import * as durations from './durations';
import type { CallLinkConversationType, CallLinkType } from '../types/CallLink';
import type { LocalizerType } from '../types/Util';

export function getRoomIdFromRootKey(rootKey: CallLinkRootKey): string {
  return rootKey.deriveRoomId().toString('hex');
}

export function getCallLinkRootKeyFromUrlKey(key: string): Uint8Array {
  // Returns `Buffer` which inherits from `Uint8Array`
  return CallLinkRootKey.parse(key).bytes;
}

export async function getCallLinkAuthCredentialPresentation(
  callLinkRootKey: CallLinkRootKey
): Promise<CallLinkAuthCredentialPresentation> {
  const credentials = getCheckedCallLinkAuthCredentialsForToday(
    'getCallLinkAuthCredentialPresentation'
  );
  const todaysCredentials = credentials.today.credential;
  const credential = new CallLinkAuthCredential(
    Buffer.from(todaysCredentials, 'base64')
  );

  const genericServerPublicParamsBase64 = window.getGenericServerPublicParams();
  const genericServerPublicParams = new GenericServerPublicParams(
    Buffer.from(genericServerPublicParamsBase64, 'base64')
  );

  const ourAci = window.textsecure.storage.user.getAci();
  if (ourAci == null) {
    throw new Error('Failed to get our ACI');
  }
  const userId = Aci.fromUuid(ourAci);

  const callLinkSecretParams = CallLinkSecretParams.deriveFromRootKey(
    callLinkRootKey.bytes
  );
  const presentation = credential.present(
    userId,
    credentials.today.redemptionTime / durations.SECOND,
    genericServerPublicParams,
    callLinkSecretParams
  );
  return presentation;
}

export function callLinkToConversation(
  callLink: CallLinkType,
  i18n: LocalizerType
): CallLinkConversationType {
  const { roomId, name } = callLink;
  return {
    id: roomId,
    type: 'callLink',
    isMe: false,
    title: name || i18n('icu:calling__call-link-default-title'),
    sharedGroupNames: [],
    acceptedMessageRequest: true,
    badges: [],
  };
}