import { ISO_DATE_LENGTH, ISO_DATE_START, MILLISECONDS_PER_SECOND } from '../../common/time';
import { TbankAccountType } from './tbank-protocol';
import { TbankAccount } from './tbank.client';

const accountTypes = {
  [TbankAccountType.Tinkoff]: { type: 'BROKERAGE', name: 'Брокерский счет' },
  [TbankAccountType.TinkoffIis]: {
    type: 'INDIVIDUAL_INVESTMENT',
    name: 'ИИС',
  },
  [TbankAccountType.InvestBox]: { type: 'INVEST_BOX', name: 'Инвесткопилка' },
  [TbankAccountType.InvestFund]: {
    type: 'MONEY_MARKET_FUND',
    name: 'Фонд денежного рынка',
  },
} as const;

type AccountType = keyof typeof accountTypes;
export type SupportedTbankAccount = {
  id: string;
  name: string;
  openedOn: null | string;
  type: (typeof accountTypes)[AccountType]['type'];
};

export function supportedTbankAccounts(
  accounts: TbankAccount[],
): SupportedTbankAccount[] {
  return accounts.flatMap((account) => {
    const details = accountTypes[account.type as AccountType];
    if (!details) return [];
    return [
      {
        id: account.id,
        name: account.name.trim() || details.name,
        type: details.type,
        openedOn: openedOn(account.openedDate?.seconds),
      },
    ];
  });
}

function openedOn(seconds: number | string | undefined): null | string {
  if (seconds === undefined) return null;
  const date = new Date(Number(seconds) * MILLISECONDS_PER_SECOND);
  if (Number.isNaN(date.valueOf())) return null;
  return date.toISOString().slice(ISO_DATE_START, ISO_DATE_LENGTH);
}