/*
 This file is part of GNU Taler
 (C) 2021-2024 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/>
 */

/**
 *
 * @author Sebastian Javier Marchano (sebasjm)
 */

import { HttpStatusCode, TalerError, assertUnreachable } from "@gnu-taler/taler-util";
import { VNode, h } from "preact";
import { useEffect, useState } from "preact/hooks";
import { ErrorLoadingMerchant } from "../../../../components/ErrorLoadingMerchant.js";
import { Loading } from "../../../../components/exception/loading.js";
import { useInstanceBankAccounts } from "../../../../hooks/bank.js";
import { useInstanceTransfers } from "../../../../hooks/transfer.js";
import { LoginPage } from "../../../login/index.js";
import { ListPage } from "./ListPage.js";
import { NotFoundPageOrAdminCreate } from "../../../notfound/index.js";

interface Props {
  onCreate: () => void;
}
interface Form {
  verified?: boolean;
  payto_uri?: string;
}

export default function ListTransfer({
  onCreate,
}: Props): VNode {
  const setFilter = (s?: boolean) => setForm({ ...form, verified: s });

  const [position, setPosition] = useState<string | undefined>(undefined);

  const instance = useInstanceBankAccounts();
  const accounts = !instance || (instance instanceof TalerError) || instance.type === "fail"
    ? []
    : instance.body.accounts.map((a) => a.payto_uri);
  const [form, setForm] = useState<Form>({ payto_uri: "" });

  const shoulUseDefaultAccount = accounts.length === 1
  useEffect(() => {
    if (shoulUseDefaultAccount) {
      setForm({...form, payto_uri: accounts[0]})
    }
  }, [shoulUseDefaultAccount])

  const isVerifiedTransfers = form.verified === true;
  const isNonVerifiedTransfers = form.verified === false;
  const isAllTransfers = form.verified === undefined;

  const result = useInstanceTransfers(
    {
      position,
      payto_uri: form.payto_uri === "" ? undefined : form.payto_uri,
      verified: form.verified,
    },
    (id) => setPosition(id),
  );

  if (!result) return <Loading />;
  if (result instanceof TalerError) {
    return <ErrorLoadingMerchant error={result} />;
  }
  if (result.type === "fail") {
    switch (result.case) {
      case HttpStatusCode.Unauthorized: {
        return <LoginPage />
      }
      case HttpStatusCode.NotFound: {
        return <NotFoundPageOrAdminCreate />;
      }
      default: {
        assertUnreachable(result);
      }
    }
  }

  return (
    <ListPage
      accounts={accounts}
      transfers={result.body}
      onLoadMoreBefore={result.isFirstPage ? undefined: result.loadFirst }
      onLoadMoreAfter={result.isLastPage ? undefined : result.loadNext}
      onCreate={onCreate}
      onDelete={() => {
        null;
      }}
      onShowAll={() => setFilter(undefined)}
      onShowUnverified={() => setFilter(false)}
      onShowVerified={() => setFilter(true)}
      isAllTransfers={isAllTransfers}
      isVerifiedTransfers={isVerifiedTransfers}
      isNonVerifiedTransfers={isNonVerifiedTransfers}
      payTo={form.payto_uri}
      onChangePayTo={(p) => setForm((v) => ({ ...v, payto_uri: p }))}
    />
  );
}