/*
 This file is part of GNU Taler
 (C) 2022-2024 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/>
 */

import { Amounts, TalerError, TranslatedString } from "@gnu-taler/taler-util";
import {
  Footer,
  GlobalNotificationsBanner,
  Header,
  Loading,
  notifyError,
  notifyException,
  useTranslationContext,
} from "@gnu-taler/web-util/browser";
import { ComponentChildren, VNode, h } from "preact";
import { useEffect, useErrorBoundary } from "preact/hooks";
import { useBankCoreApiContext } from "../context/config.js";
import { useSettingsContext } from "../context/settings.js";
import { useAccountDetails } from "../hooks/access.js";
import { useBackendState } from "../hooks/backend.js";
import { useBankState } from "../hooks/bank-state.js";
import {
  getAllBooleanPreferences,
  getLabelForPreferences,
  usePreferences,
} from "../hooks/preferences.js";
import { RenderAmount } from "./PaytoWireTransferForm.js";
import { RouteDefinition } from "../route.js";

const GIT_HASH = typeof __GIT_HASH__ !== "undefined" ? __GIT_HASH__ : undefined;
const VERSION = typeof __VERSION__ !== "undefined" ? __VERSION__ : undefined;

export function BankFrame({
  children,
  account,
  routeAccountDetails,
}: {
  account?: string;
  routeAccountDetails?: RouteDefinition<Record<string, never>>;
  children: ComponentChildren;
}): VNode {
  const { i18n } = useTranslationContext();
  const backend = useBackendState();
  const settings = useSettingsContext();
  const [preferences, updatePreferences] = usePreferences();
  const [, , resetBankState] = useBankState();

  const [error, resetError] = useErrorBoundary();

  useEffect(() => {
    if (error) {
      if (error instanceof Error) {
        console.log("Internal error, please report", error);
        notifyException(i18n.str`Internal error, please report.`, error);
      } else {
        console.log("Internal error, please report", error);
        notifyError(
          i18n.str`Internal error, please report.`,
          String(error) as TranslatedString,
        );
      }
      resetError();
    }
  }, [error]);

  return (
    <div
      class="min-h-full flex flex-col m-0 bg-slate-200"
      style="min-height: 100vh;"
    >
      <div class="bg-indigo-600 pb-32">
        <Header
          title="Bank"
          iconLinkURL={settings.iconLinkURL ?? "#"}
          onLogout={
            backend.state.status !== "loggedIn"
              ? undefined
              : () => {
                backend.logOut();
                resetBankState();
              }
          }
          sites={
            !settings.topNavSites ? [] : Object.entries(settings.topNavSites)
          }
          supportedLangs={["en", "es", "de"]}
        >
          <li>
            <div class="text-xs font-semibold leading-6 text-gray-400">
              <i18n.Translate>Preferences</i18n.Translate>
            </div>
            <ul role="list" class="space-y-1">
              {getAllBooleanPreferences().map((set) => {
                const isOn: boolean = !!preferences[set];
                return (
                  <li key={set} class="mt-2 pl-2">
                    <div class="flex items-center justify-between">
                      <span class="flex flex-grow flex-col">
                        <span
                          class="text-sm text-black font-medium leading-6 "
                          id="availability-label"
                        >
                          {getLabelForPreferences(set, i18n)}
                        </span>
                      </span>
                      <button
                        type="button"
                        data-enabled={isOn}
                        class="bg-indigo-600 data-[enabled=false]:bg-gray-200 relative inline-flex h-6 w-11 flex-shrink-0 cursor-pointer rounded-full border-2 border-transparent transition-colors duration-200 ease-in-out focus:outline-none focus:ring-2 focus:ring-indigo-600 focus:ring-offset-2"
                        role="switch"
                        aria-checked="false"
                        aria-labelledby="availability-label"
                        aria-describedby="availability-description"
                        onClick={() => {
                          updatePreferences(set, !isOn);
                        }}
                      >
                        <span
                          aria-hidden="true"
                          data-enabled={isOn}
                          class="translate-x-5 data-[enabled=false]:translate-x-0 pointer-events-none inline-block h-5 w-5 transform rounded-full bg-white shadow ring-0 transition duration-200 ease-in-out"
                        ></span>
                      </button>
                    </div>
                  </li>
                );
              })}
            </ul>
          </li>
        </Header>
      </div>

      <GlobalNotificationsBanner />

      <main class="-mt-32 flex-1">
        {account && routeAccountDetails && (
          <header class="py-5 bg-indigo-600   ">
            <div class="mx-auto max-w-7xl px-4 sm:px-6 lg:px-8">
              <h1 class=" flex flex-wrap items-center justify-between sm:flex-nowrap">
                <span class="text-2xl font-bold tracking-tight text-white">
                  <WelcomeAccount account={account} routeAccountDetails={routeAccountDetails} />
                </span>
                <span class="text-2xl font-bold tracking-tight text-white">
                  <AccountBalance account={account} />
                </span>
              </h1>
            </div>
          </header>
        )}

        <div class="mx-auto max-w-7xl px-4 pb-12 sm:px-6 lg:px-8">
          <div class="rounded-lg bg-white px-5 py-6 shadow sm:px-6">
            {children}
          </div>
        </div>
      </main>

      <Footer
        testingUrlKey="corebank-api-base-url"
        GIT_HASH={GIT_HASH}
        VERSION={VERSION}
      />
    </div>
  );
}

function WelcomeAccount({ account, routeAccountDetails }: {
  account: string,
  routeAccountDetails: RouteDefinition<Record<string, never>>;
}): VNode {
  const { i18n } = useTranslationContext();
  const result = useAccountDetails(account);
  if (!result) {
    return <Loading />;
  }
  if (result instanceof TalerError) {
    return <div />;
  }
  if (result.type === "fail") {
    return (
      <a
        href={routeAccountDetails.url({})}
        class="underline underline-offset-2"
      >
        <i18n.Translate>Welcome</i18n.Translate>
      </a>
    );
  }
  return (
    <a
      href={routeAccountDetails.url({})}
      class="underline underline-offset-2"
    >
      <i18n.Translate>
        Welcome, <span class="whitespace-nowrap">{result.body.name}</span>
      </i18n.Translate>
    </a>
  );
}

function AccountBalance({ account }: { account: string }): VNode {
  const result = useAccountDetails(account);
  const { config } = useBankCoreApiContext();
  if (!result) {
    return <Loading />;
  }
  if (result instanceof TalerError) {
    return <div />;
  }
  if (result.type === "fail") return <div />;

  return (
    <RenderAmount
      value={Amounts.parseOrThrow(result.body.balance.amount)}
      negative={result.body.balance.credit_debit_indicator === "debit"}
      spec={config.currency_specification}
    />
  );
}