/*
 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/>
 */

/**
 * Popup shown to the user when they click
 * the Taler browser action button.
 *
 * @author sebasjm
 */

/**
 * Imports.
 */
import { WalletApiOperation } from "@gnu-taler/taler-wallet-core";
import { Fragment, h, VNode } from "preact";
import { EnabledBySettings } from "./components/EnabledBySettings.js";
import {
  NavigationHeader,
  NavigationHeaderHolder,
  SvgIcon,
} from "./components/styled/index.js";
import { useBackendContext } from "./context/backend.js";
import { useAsyncAsHook } from "./hooks/useAsyncAsHook.js";
import searchIcon from "./svg/search_24px.inline.svg";
import qrIcon from "./svg/qr_code_24px.inline.svg";
import settingsIcon from "./svg/settings_black_24dp.inline.svg";
import warningIcon from "./svg/warning_24px.inline.svg";
import { parseTalerUri, TalerUriAction } from "@gnu-taler/taler-util";
import {
  encodeCrockForURI,
  useTranslationContext,
} from "@gnu-taler/web-util/browser";

/**
 * List of pages used by the wallet
 *
 * @author sebasjm
 */

// eslint-disable-next-line @typescript-eslint/ban-types
type PageLocation<DynamicPart extends object> = {
  pattern: string;
  (params: DynamicPart): string;
};

function replaceAll(
  pattern: string,
  vars: Record<string, string>,
  values: Record<string, string>,
): string {
  let result = pattern;
  for (const v in vars) {
    result = result.replace(vars[v], !values[v] ? "" : values[v]);
  }
  return result;
}

// eslint-disable-next-line @typescript-eslint/ban-types
function pageDefinition<T extends object>(pattern: string): PageLocation<T> {
  const patternParams = pattern.match(/(:[\w?]*)/g);
  if (!patternParams)
    throw Error(
      `page definition pattern ${pattern} doesn't have any parameter`,
    );

  const vars = patternParams.reduce(
    (prev, cur) => {
      const pName = cur.match(/(\w+)/g);

      //skip things like :? in the path pattern
      if (!pName || !pName[0]) return prev;
      const name = pName[0];
      return { ...prev, [name]: cur };
    },
    {} as Record<string, string>,
  );

  const f = (values: T): string =>
    replaceAll(pattern, vars, (values ?? {}) as Record<string, string>);
  f.pattern = pattern;
  return f;
}

/**
 * taler action and scope info may contain
 * character not suitable for URL
 */
type CrockEncodedString = string;

export const Pages = {
  welcome: "/welcome",
  balance: "/balance",
  balanceHistory: pageDefinition<{ scope?: CrockEncodedString }>(
    "/balance/history/:scope?",
  ),
  searchHistory: pageDefinition<{ scope?: CrockEncodedString }>(
    "/search/history/:scope?",
  ),
  balanceTransaction: pageDefinition<{ tid: string }>(
    "/balance/transaction/:tid",
  ),
  bankManange: pageDefinition<{ scope: CrockEncodedString }>(
    "/bank/manage/:scope",
  ),
  balanceDeposit: pageDefinition<{
    scope: CrockEncodedString;
  }>("/balance/deposit/:scope"),
  sendCash: pageDefinition<{ scope: CrockEncodedString; amount?: string }>(
    "/destination/send/:scope/:amount?",
  ),
  // if no scope is specified, then exchange selection page will be shown
  receiveCash: pageDefinition<{ scope?: CrockEncodedString; amount?: string }>(
    "/destination/get/:scope?/:amount?",
  ),
  receiveCashForPurchase: pageDefinition<{ id?: string }>(
    "/add-for-payment/purchase/:id",
  ),
  receiveCashForInvoice: pageDefinition<{ id?: string }>(
    "/add-for-payment/purchase/:id",
  ),
  dev: "/dev",

  exchanges: "/exchanges",
  backup: "/backup",
  backupProviderDetail: pageDefinition<{ pid: string }>(
    "/backup/provider/:pid",
  ),
  backupProviderAdd: "/backup/provider/add",

  qr: "/qr",
  notifications: "/notifications",
  settings: "/settings",
  settingsExchangeAdd: pageDefinition<{ currency?: string }>(
    "/settings/exchange/add/:currency?",
  ),

  defaultCta: pageDefinition<{ uri: CrockEncodedString }>("/taler-uri/:uri"),
  // FIXME: mem leak problems
  defaultCtaSimple: pageDefinition<{ uri: CrockEncodedString }>(
    "/taler-uri-simple/:uri",
  ),
  cta: pageDefinition<{ action: CrockEncodedString }>("/cta/:action"),
  ctaPay: "/cta/pay",
  ctaPayTemplate: "/cta/pay/template",
  ctaRecovery: "/cta/recovery",
  ctaRefund: "/cta/refund",
  ctaWithdraw: "/cta/withdraw",
  ctaDeposit: pageDefinition<{
    scope: CrockEncodedString;
    account: CrockEncodedString;
  }>("/cta/deposit/:scope/:account"),
  ctaExperiment: "/cta/experiment",
  ctaAddExchange: "/cta/add/exchange",
  ctaInvoiceCreate: pageDefinition<{
    scope: CrockEncodedString;
  }>("/cta/invoice/create/:scope/:amount?"),
  ctaTransferCreate: pageDefinition<{
    scope: CrockEncodedString;
  }>("/cta/transfer/create/:scope/:amount?"),
  ctaInvoicePay: "/cta/invoice/pay",
  ctaTransferPickup: "/cta/transfer/pickup",

  ctaWithdrawManual: pageDefinition<{
    scope: CrockEncodedString;
    amount?: string;
  }>("/cta/manual-withdraw/:scope/:amount?"),
  paytoQrs: pageDefinition<{ payto: CrockEncodedString }>("/payto/qrs/:payto?"),
  paytoBanks: pageDefinition<{ payto: CrockEncodedString }>(
    "/payto/banks/:payto?",
  ),
};

const talerUriActionToPageName: {
  [t in TalerUriAction]: keyof typeof Pages | undefined;
} = {
  [TalerUriAction.Withdraw]: "ctaWithdraw",
  [TalerUriAction.Pay]: "ctaPay",
  [TalerUriAction.Refund]: "ctaRefund",
  [TalerUriAction.PayPull]: "ctaInvoicePay",
  [TalerUriAction.PayPush]: "ctaTransferPickup",
  [TalerUriAction.Restore]: "ctaRecovery",
  [TalerUriAction.PayTemplate]: "ctaPayTemplate",
  [TalerUriAction.WithdrawExchange]: "ctaWithdrawManual",
  [TalerUriAction.DevExperiment]: "ctaExperiment",
  [TalerUriAction.AddExchange]: "ctaAddExchange",
};

export function getPathnameForTalerURI(talerUri: string): string | undefined {
  const uri = parseTalerUri(talerUri);
  if (!uri) {
    return undefined;
  }
  const pageName = talerUriActionToPageName[uri.type];
  if (!pageName) {
    return undefined;
  }
  const pageString: string =
    typeof Pages[pageName] === "function"
      ? (Pages[pageName] as any)()
      : Pages[pageName];
  return `${pageString}?talerUri=${encodeCrockForURI(talerUri)}`;
}

export type PopupNavBarOptions = "balance" | "backup" | "dev";
export function PopupNavBar({ path }: { path?: PopupNavBarOptions }): VNode {
  const api = useBackendContext();
  const hook = useAsyncAsHook(async () => {
    return await api.wallet.call(
      WalletApiOperation.GetUserAttentionUnreadCount,
      {},
    );
  });
  const attentionCount = !hook || hook.hasError ? 0 : hook.response.total;

  const { i18n } = useTranslationContext();
  return (
    <NavigationHeader>
      <a href={`#${Pages.balance}`} class={path === "balance" ? "active" : ""}>
        <i18n.Translate>Balance</i18n.Translate>
      </a>
      <EnabledBySettings name="backup">
        <a href={`#${Pages.backup}`} class={path === "backup" ? "active" : ""}>
          <i18n.Translate>Backup</i18n.Translate>
        </a>
      </EnabledBySettings>
      <div style={{ display: "flex", paddingTop: 4, justifyContent: "right" }}>
        {attentionCount > 0 ? (
          <a href={`#${Pages.notifications}`}>
            <SvgIcon
              title={i18n.str`Notifications`}
              dangerouslySetInnerHTML={{ __html: warningIcon }}
              color="yellow"
            />
          </a>
        ) : (
          <Fragment />
        )}
        <a href={`#${Pages.qr}`}>
          <SvgIcon
            title={i18n.str`QR Reader and Taler URI`}
            dangerouslySetInnerHTML={{ __html: qrIcon }}
            color="white"
          />
        </a>
        <a href={`#${Pages.settings}`}>
          <SvgIcon
            title={i18n.str`Settings`}
            dangerouslySetInnerHTML={{ __html: settingsIcon }}
            color="white"
          />
        </a>
      </div>
    </NavigationHeader>
  );
}
export type WalletNavBarOptions = "balance" | "backup" | "dev";
export function WalletNavBar({ path }: { path?: WalletNavBarOptions }): VNode {
  const { i18n } = useTranslationContext();

  const api = useBackendContext();
  const hook = useAsyncAsHook(async () => {
    return await api.wallet.call(
      WalletApiOperation.GetUserAttentionUnreadCount,
      {},
    );
  });
  const attentionCount =
    (!hook || hook.hasError ? 0 : hook.response?.total) ?? 0;

  return (
    <NavigationHeaderHolder>
      <NavigationHeader>
        <a
          href={`#${Pages.balance}`}
          class={path === "balance" ? "active" : ""}
        >
          <i18n.Translate>Balance</i18n.Translate>
        </a>
        <EnabledBySettings name="backup">
          <a
            href={`#${Pages.backup}`}
            class={path === "backup" ? "active" : ""}
          >
            <i18n.Translate>Backup</i18n.Translate>
          </a>
        </EnabledBySettings>

        {attentionCount > 0 ? (
          <a href={`#${Pages.notifications}`}>
            <i18n.Translate>Notifications</i18n.Translate>
          </a>
        ) : (
          <Fragment />
        )}

        <EnabledBySettings name="advancedMode">
          <a href={`#${Pages.dev}`} class={path === "dev" ? "active" : ""}>
            <i18n.Translate>Dev tools</i18n.Translate>
          </a>
        </EnabledBySettings>

        <div
          style={{ display: "flex", paddingTop: 4, justifyContent: "right" }}
        >
          <a href={`#${Pages.searchHistory({})}`}>
            <SvgIcon
              title={i18n.str`Search transactions`}
              dangerouslySetInnerHTML={{ __html: searchIcon }}
              color="white"
            />
          </a>
          <a href={`#${Pages.qr}`}>
            <SvgIcon
              title={i18n.str`QR Reader and Taler URI`}
              dangerouslySetInnerHTML={{ __html: qrIcon }}
              color="white"
            />
          </a>
          <a href={`#${Pages.settings}`}>
            <SvgIcon
              title={i18n.str`Settings`}
              dangerouslySetInnerHTML={{ __html: settingsIcon }}
              color="white"
            />
          </a>
        </div>
      </NavigationHeader>
    </NavigationHeaderHolder>
  );
}