/*
 This file is part of GNU Taler
 (C) 2022 Taler Systems S.A.

 GNU Taler is free software; you can redistribute it and/or modify it under the
 terms of the GNU General Public License as published by the Free Software
 Foundation; either version 3, or (at your option) any later version.

 GNU Taler is distributed in the hope that it will be useful, but WITHOUT ANY
 WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
 A PARTICULAR PURPOSE.  See the GNU General Public License for more details.

 You should have received a copy of the GNU General Public License along with
 GNU Taler; see the file COPYING.  If not, see <http://www.gnu.org/licenses/>
 */

import { AbsoluteTime, Amounts } from "@gnu-taler/taler-util";
import { useTransactions } from "../../hooks/access.js";
import { Props, State, Transaction } from "./index.js";

export function useComponentState({ account }: Props): State {
  const result = useTransactions(account);
  if (result.loading) {
    return {
      status: "loading",
      error: undefined,
    };
  }
  if (!result.ok) {
    return {
      status: "loading-error",
      error: result,
    };
  }

  const transactions = result.data.transactions
    .map((item: unknown) => {
      if (
        !item ||
        typeof item !== "object" ||
        !("direction" in item) ||
        !("creditorIban" in item) ||
        !("debtorIban" in item) ||
        !("date" in item) ||
        !("subject" in item) ||
        !("currency" in item) ||
        !("amount" in item)
      ) {
        //not valid
        return;
      }
      const anyItem = item as any;
      if (
        !(typeof anyItem.creditorIban === "string") ||
        !(typeof anyItem.debtorIban === "string") ||
        !(typeof anyItem.date === "string") ||
        !(typeof anyItem.subject === "string") ||
        !(typeof anyItem.currency === "string") ||
        !(typeof anyItem.amount === "string")
      ) {
        return;
      }

      const negative = anyItem.direction === "DBIT";
      const counterpart = negative ? anyItem.creditorIban : anyItem.debtorIban;

      let date = anyItem.date ? parseInt(anyItem.date, 10) : 0;
      if (isNaN(date) || !isFinite(date)) {
        date = 0;
      }
      const when: AbsoluteTime = !date
        ? AbsoluteTime.never()
        : {
            t_ms: date,
          };
      const amount = Amounts.parse(`${anyItem.currency}:${anyItem.amount}`);
      const subject = anyItem.subject;
      return {
        negative,
        counterpart,
        when,
        amount,
        subject,
      };
    })
    .filter((x): x is Transaction => x !== undefined);

  return {
    status: "ready",
    error: undefined,
    transactions,
  };
}