/*
 This file is part of GNU Taler
 (C) 2021-2023 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 {
  FormErrors,
  FormProvider,
} from "../../../../components/form/FormProvider.js";
import { Input } from "../../../../components/form/Input.js";
import { InputPaytoForm } from "../../../../components/form/InputPaytoForm.js";
import { InputSelector } from "../../../../components/form/InputSelector.js";
import { MerchantBackend } from "../../../../declaration.js";
import { undefinedIfEmpty } from "../../../../utils/table.js";

type Entity = MerchantBackend.BankAccounts.AccountAddDetails & { repeatPassword: string };

interface Props {
  onCreate: (d: MerchantBackend.BankAccounts.AccountAddDetails) => Promise<void>;
  onBack?: () => void;
}

const accountAuthType = ["none", "basic"];

function isValidURL(s: string): boolean {
  try {
    const u = new URL("/", s)
    return true;
  } catch (e) {
    return false;
  }
}

export function CreatePage({ onCreate, onBack }: Props): VNode {
  const { i18n } = useTranslationContext();

  const [state, setState] = useState<Partial<Entity>>({});
  const errors: FormErrors<Entity> = {
    payto_uri: !state.payto_uri ? i18n.str`required` : undefined,

    credit_facade_credentials: !state.credit_facade_credentials
      ? undefined
      : undefinedIfEmpty({
        username:
          state.credit_facade_credentials.type === "basic" && !state.credit_facade_credentials.username
            ? i18n.str`required`
            : undefined,
        password:
          state.credit_facade_credentials.type === "basic" && !state.credit_facade_credentials.password
            ? i18n.str`required`
            : undefined,
      }),
    credit_facade_url: !state.credit_facade_url
      ? undefined
      : !isValidURL(state.credit_facade_url) ? i18n.str`not valid url`
        : undefined,
    repeatPassword:
      !state.credit_facade_credentials
        ? undefined
        : state.credit_facade_credentials.type === "basic" && (!state.credit_facade_credentials.password || state.credit_facade_credentials.password !== state.repeatPassword)
          ? i18n.str`is not the same`
          : undefined,
  };

  const hasErrors = Object.keys(errors).some(
    (k) => (errors as any)[k] !== undefined,
  );

  const submitForm = () => {
    if (hasErrors) return Promise.reject();
    const credit_facade_url = !state.credit_facade_url ? undefined : new URL("/", state.credit_facade_url).href
    const credit_facade_credentials: MerchantBackend.BankAccounts.FacadeCredentials | undefined =
      credit_facade_url == undefined ? undefined :
        state.credit_facade_credentials?.type === "basic" ? {
          type: "basic",
          password: state.credit_facade_credentials.password,
          username: state.credit_facade_credentials.username,
        } : {
          type: "none"
        }

    return onCreate({
      payto_uri: state.payto_uri!,
      credit_facade_credentials,
      credit_facade_url,
    });
  };

  return (
    <div>
      <section class="section is-main-section">
        <div class="columns">
          <div class="column" />
          <div class="column is-four-fifths">
            <FormProvider
              object={state}
              valueHandler={setState}
              errors={errors}
            >
              <InputPaytoForm<Entity>
                name="payto_uri"
                label={i18n.str`Account`}
              />
              <Input<Entity>
                name="credit_facade_url"
                label={i18n.str`Account info URL`}
                help="https://bank.com"
                expand
                tooltip={i18n.str`From where the merchant can download information about incoming wire transfers to this account`}
              />
              <InputSelector
                name="credit_facade_credentials.type"
                label={i18n.str`Auth type`}
                tooltip={i18n.str`Choose the authentication type for the account info URL`}
                values={accountAuthType}
                toStr={(str) => {
                  if (str === "none") return "Without authentication";
                  return "Username and password";
                }}
              />
              {state.credit_facade_credentials?.type === "basic" ? (
                <Fragment>
                  <Input
                    name="credit_facade_credentials.username"
                    label={i18n.str`Username`}
                    tooltip={i18n.str`Username to access the account information.`}
                  />
                  <Input
                    name="credit_facade_credentials.password"
                    inputType="password"
                    label={i18n.str`Password`}
                    tooltip={i18n.str`Password to access the account information.`}
                  />
                  <Input
                    name="repeatPassword"
                    inputType="password"
                    label={i18n.str`Repeat password`}
                  />
                </Fragment>
              ) : undefined}
            </FormProvider>

            <div class="buttons is-right mt-5">
              {onBack && (
                <button class="button" onClick={onBack}>
                  <i18n.Translate>Cancel</i18n.Translate>
                </button>
              )}
              <AsyncButton
                disabled={hasErrors}
                data-tooltip={
                  hasErrors
                    ? i18n.str`Need to complete marked fields`
                    : "confirm operation"
                }
                onClick={submitForm}
              >
                <i18n.Translate>Confirm</i18n.Translate>
              </AsyncButton>
            </div>
          </div>
          <div class="column" />
        </div>
      </section>
    </div>
  );
}
