/*
 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,
  NotificationType,
  Transaction,
} from "@gnu-taler/taler-util";
import { WalletApiOperation } from "@gnu-taler/taler-wallet-core";
import { Fragment, h, JSX, VNode } from "preact";
import { useEffect } from "preact/hooks";
import { useBackendContext } from "../context/backend.js";
import { useTranslationContext } from "../context/translation.js";
import { useAsyncAsHook } from "../hooks/useAsyncAsHook.js";
import { Avatar } from "../mui/Avatar.js";
import { Typography } from "../mui/Typography.js";
import Banner from "./Banner.js";
import { Time } from "./Time.js";

interface Props extends JSX.HTMLAttributes {
  goToTransaction: (id: string) => Promise<void>;
}

export function PendingTransactions({ goToTransaction }: Props): VNode {
  const api = useBackendContext();
  const state = useAsyncAsHook(() =>
    api.wallet.call(WalletApiOperation.GetTransactions, {}),
  );

  useEffect(() => {
    return api.listener.onUpdateNotification(
      [NotificationType.WithdrawGroupFinished],
      state?.retry,
    );
  });

  const transactions =
    !state || state.hasError
      ? []
      : state.response.transactions.filter((t) => t.pending);

  if (!state || state.hasError || !transactions.length) {
    return <Fragment />;
  }
  return (
    <PendingTransactionsView
      goToTransaction={goToTransaction}
      transactions={transactions}
    />
  );
}

export function PendingTransactionsView({
  transactions,
  goToTransaction,
}: {
  goToTransaction: (id: string) => Promise<void>;
  transactions: Transaction[];
}): VNode {
  const { i18n } = useTranslationContext();
  return (
    <Banner
      titleHead={<i18n.Translate>PENDING OPERATIONS</i18n.Translate>}
      style={{
        backgroundColor: "lightcyan",
        maxHeight: 150,
        padding: 8,
        flexGrow: 1,
        maxWidth: 500,
        overflowY: transactions.length > 3 ? "scroll" : "hidden",
      }}
      elements={transactions.map((t) => {
        const amount = Amounts.parseOrThrow(t.amountEffective);
        return {
          icon: (
            <Avatar
              style={{
                border: "solid blue 1px",
                color: "blue",
                boxSizing: "border-box",
              }}
            >
              {t.type.substring(0, 1)}
            </Avatar>
          ),
          action: () => goToTransaction(t.transactionId),
          description: (
            <Fragment>
              <Typography inline bold>
                {amount.currency} {Amounts.stringifyValue(amount)}
              </Typography>
              &nbsp;-&nbsp;
              <Time
                timestamp={AbsoluteTime.fromTimestamp(t.timestamp)}
                format="dd MMMM yyyy"
              />
            </Fragment>
          ),
        };
      })}
    />
  );
}

export default PendingTransactions;