/**
 * @license
 * Copyright (C) 2020 The Android Open Source Project
 *
 * 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 {
  AccountId,
  AccountInfo,
  EmailAddress,
  GroupInfo,
  isAccount,
  isGroup,
} from '../types/common';
import {AccountTag} from '../constants/constants';
import {assertNever} from './common-util';

export function accountKey(account: AccountInfo): AccountId | EmailAddress {
  if (account._account_id) return account._account_id;
  if (account.email) return account.email;
  throw new Error('Account has neither _account_id nor email.');
}

export function isServiceUser(account?: AccountInfo): boolean {
  return !!account?.tags?.includes(AccountTag.SERVICE_USER);
}

export function isSelf(account?: AccountInfo, self?: AccountInfo): boolean {
  return account?._account_id === self?._account_id;
}

export function removeServiceUsers(accounts?: AccountInfo[]): AccountInfo[] {
  return accounts?.filter(a => !isServiceUser(a)) || [];
}

export function hasSameAvatar(account?: AccountInfo, other?: AccountInfo) {
  return account?.avatars?.[0]?.url === other?.avatars?.[0]?.url;
}

export function accountOrGroupKey(entry: AccountInfo | GroupInfo) {
  if (isAccount(entry)) return accountKey(entry);
  if (isGroup(entry)) return entry.id;
  assertNever(entry, 'entry must be account or group');
}

export function uniqueDefinedAvatar(
  account: AccountInfo,
  index: number,
  accountArray: AccountInfo[]
) {
  return (
    index === accountArray.findIndex(other => hasSameAvatar(account, other))
  );
}