/*
 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 { useTranslationContext } from "@gnu-taler/web-util/browser";
import { Fragment, h, VNode } from "preact";
import { useState } from "preact/hooks";
import { AsyncButton } from "../../../components/exception/AsyncButton.js";
import { FormProvider } from "../../../components/form/FormProvider.js";
import { Input } from "../../../components/form/Input.js";
import { NotificationCard } from "../../../components/menu/index.js";
import { useSessionContext } from "../../../context/session.js";
import { AccessToken, createRFC8959AccessTokenPlain } from "@gnu-taler/taler-util";
import { undefinedIfEmpty } from "../../../utils/table.js";

interface Props {
  hasToken: boolean | undefined;
  onClearToken: (c: AccessToken | undefined) => void;
  onNewToken: (c: AccessToken | undefined, s: AccessToken) => void;
  onBack?: () => void;
}

export function DetailPage({
  hasToken,
  onBack,
  onNewToken,
  onClearToken,
}: Props): VNode {
  type State = { old_token: string; new_token: string; repeat_token: string };
  const [form, setValue] = useState<Partial<State>>({
    old_token: "",
    new_token: "",
    repeat_token: "",
  });
  const { i18n } = useTranslationContext();

  const errors = undefinedIfEmpty({
    old_token:
      hasToken && !form.old_token
        ? i18n.str`You need your access token to perform the operation`
        : undefined,
    new_token: !form.new_token
      ? i18n.str`Required`
      : form.new_token === form.old_token
        ? i18n.str`Can't be the same as the old token`
        : undefined,
    repeat_token:
      form.new_token !== form.repeat_token
        ? i18n.str`Is not the same`
        : undefined,
  });

  const hasErrors = errors !== undefined;

  const { state } = useSessionContext();

  const text = i18n.str`You are updating the access token from instance with id "${state.instance}"`;

  async function submitForm() {
    if (hasErrors) return;
    const oldToken =
      form.old_token !== undefined && hasToken
        ? createRFC8959AccessTokenPlain(form.old_token)
        : undefined;
    const newToken = createRFC8959AccessTokenPlain(form.new_token!);
    onNewToken(oldToken, newToken);
  }

  return (
    <div>
      <section class="section">
        <section class="hero is-hero-bar">
          <div class="hero-body">
            <div class="level">
              <div class="level-left">
                <div class="level-item">
                  <span class="is-size-4">{text}</span>
                </div>
              </div>
            </div>
          </div>
        </section>
        <hr />

        {!hasToken && (
          <NotificationCard
            notification={{
              message: i18n.str`This instance doesn't have authentication token.`,
              description: i18n.str`You can leave it empty if there is another layer of security.`,
              type: "WARN",
            }}
          />
        )}

        <div class="columns">
          <div class="column" />
          <div class="column is-four-fifths">
            <FormProvider errors={errors} object={form} valueHandler={setValue}>
              <Fragment>
                {hasToken && (
                  <Fragment>
                    <Input<State>
                      name="old_token"
                      label={i18n.str`Current access token`}
                      tooltip={i18n.str`Access token currently in use`}
                      inputType="password"
                    />
                    <p>
                      <i18n.Translate>
                        Clearing the access token will mean public access to the
                        instance.
                      </i18n.Translate>
                    </p>
                    <div class="buttons is-right mt-5">
                      <button
                        class="button"
                        onClick={() => {
                          if (hasToken) {
                            onClearToken(form.old_token ? createRFC8959AccessTokenPlain(form.old_token) : undefined);
                          } else {
                            onClearToken(undefined);
                          }
                        }}
                      >
                        <i18n.Translate>Clear token</i18n.Translate>
                      </button>
                    </div>
                  </Fragment>
                )}

                <Input<State>
                  name="new_token"
                  label={i18n.str`New access token`}
                  tooltip={i18n.str`Next access token to be used`}
                  inputType="password"
                />
                <Input<State>
                  name="repeat_token"
                  label={i18n.str`Repeat access token`}
                  tooltip={i18n.str`Confirm the same access token`}
                  inputType="password"
                />
              </Fragment>
              <div class="buttons is-right mt-5">
                {onBack && (
                  <a class="button" onClick={onBack}>
                    <i18n.Translate>Cancel</i18n.Translate>
                  </a>
                )}
                <AsyncButton
                  type="submit"
                  disabled={hasErrors}
                  data-tooltip={
                    hasErrors
                      ? i18n.str`Need to complete marked fields`
                      : i18n.str`Confirm operation`
                  }
                  onClick={submitForm}
                >
                  <i18n.Translate>Confirm change</i18n.Translate>
                </AsyncButton>
              </div>
            </FormProvider>
          </div>
          <div class="column" />
        </div>
      </section>
    </div>
  );
}