/*
 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/>
 */

import { Amounts, HttpStatusCode, parsePaytoUri } from "@gnu-taler/taler-util";
import {
  ErrorType,
  HttpResponsePaginated,
  RequestError,
  useTranslationContext,
} from "@gnu-taler/web-util/lib/index.browser";
import { Fragment, h, VNode } from "preact";
import { useState } from "preact/hooks";
import { Cashouts } from "../components/Cashouts/index.js";
import { useBackendContext } from "../context/backend.js";
import { useAccountDetails } from "../hooks/access.js";
import {
  useAdminAccountAPI,
  useBusinessAccountDetails,
  useBusinessAccounts,
} from "../hooks/circuit.js";
import {
  buildRequestErrorMessage,
  PartialButDefined,
  RecursivePartial,
  undefinedIfEmpty,
  validateIBAN,
  WithIntermediate,
} from "../utils.js";
import { ErrorBannerFloat } from "./BankFrame.js";
import { ShowCashoutDetails } from "./BusinessAccount.js";
import { handleNotOkResult } from "./HomePage.js";
import { PaytoWireTransferForm } from "./PaytoWireTransferForm.js";
import { ShowInputErrorLabel } from "./ShowInputErrorLabel.js";
import { ErrorMessage, notifyInfo } from "../hooks/notification.js";

const charset =
  "abcdefghijklmnopqrstuvwxyz0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
const upperIdx = charset.indexOf("A");

function randomPassword(): string {
  const random = Array.from({ length: 16 }).map(() => {
    return charset.charCodeAt(Math.random() * charset.length);
  });
  // first char can't be upper
  const charIdx = charset.indexOf(String.fromCharCode(random[0]));
  random[0] =
    charIdx > upperIdx ? charset.charCodeAt(charIdx - upperIdx) : random[0];
  return String.fromCharCode(...random);
}

interface Props {
  onRegister: () => void;
}
/**
 * Query account information and show QR code if there is pending withdrawal
 */
export function AdminPage({ onRegister }: Props): VNode {
  const [account, setAccount] = useState<string | undefined>();
  const [showDetails, setShowDetails] = useState<string | undefined>();
  const [showCashouts, setShowCashouts] = useState<string | undefined>();
  const [updatePassword, setUpdatePassword] = useState<string | undefined>();
  const [removeAccount, setRemoveAccount] = useState<string | undefined>();
  const [showCashoutDetails, setShowCashoutDetails] = useState<
    string | undefined
  >();

  const [createAccount, setCreateAccount] = useState(false);

  const result = useBusinessAccounts({ account });
  const { i18n } = useTranslationContext();

  if (result.loading) return <div />;
  if (!result.ok) {
    return handleNotOkResult(i18n, onRegister)(result);
  }

  const { customers } = result.data;

  if (showCashoutDetails) {
    return (
      <ShowCashoutDetails
        id={showCashoutDetails}
        onLoadNotOk={handleNotOkResult(i18n, onRegister)}
        onCancel={() => {
          setShowCashoutDetails(undefined);
        }}
      />
    );
  }

  if (showCashouts) {
    return (
      <div>
        <div>
          <h1 class="nav welcome-text">
            <i18n.Translate>Cashout for account {showCashouts}</i18n.Translate>
          </h1>
        </div>
        <Cashouts
          account={showCashouts}
          onSelected={(id) => {
            setShowCashouts(id);
            setShowCashouts(undefined);
          }}
        />
        <p>
          <input
            class="pure-button"
            type="submit"
            value={i18n.str`Close`}
            onClick={async (e) => {
              e.preventDefault();
              setShowCashouts(undefined);
            }}
          />
        </p>
      </div>
    );
  }

  if (showDetails) {
    return (
      <ShowAccountDetails
        account={showDetails}
        onLoadNotOk={handleNotOkResult(i18n, onRegister)}
        onChangePassword={() => {
          setUpdatePassword(showDetails);
          setShowDetails(undefined);
        }}
        onUpdateSuccess={() => {
          notifyInfo(i18n.str`Account updated`);
          setShowDetails(undefined);
        }}
        onClear={() => {
          setShowDetails(undefined);
        }}
      />
    );
  }
  if (removeAccount) {
    return (
      <RemoveAccount
        account={removeAccount}
        onLoadNotOk={handleNotOkResult(i18n, onRegister)}
        onUpdateSuccess={() => {
          notifyInfo(i18n.str`Account removed`);
          setRemoveAccount(undefined);
        }}
        onClear={() => {
          setRemoveAccount(undefined);
        }}
      />
    );
  }
  if (updatePassword) {
    return (
      <UpdateAccountPassword
        account={updatePassword}
        onLoadNotOk={handleNotOkResult(i18n, onRegister)}
        onUpdateSuccess={() => {
          notifyInfo(i18n.str`Password changed`);
          setUpdatePassword(undefined);
        }}
        onClear={() => {
          setUpdatePassword(undefined);
        }}
      />
    );
  }
  if (createAccount) {
    return (
      <CreateNewAccount
        onClose={() => setCreateAccount(false)}
        onCreateSuccess={(password) => {
          notifyInfo(
            i18n.str`Account created with password "${password}". The user must change the password on the next login.`,
          );
          setCreateAccount(false);
        }}
      />
    );
  }

  return (
    <Fragment>
      <div>
        <h1 class="nav welcome-text">
          <i18n.Translate>Admin panel</i18n.Translate>
        </h1>
      </div>

      <p>
        <div style={{ display: "flex", justifyContent: "space-between" }}>
          <div></div>
          <div>
            <input
              class="pure-button pure-button-primary content"
              type="submit"
              value={i18n.str`Create account`}
              onClick={async (e) => {
                e.preventDefault();

                setCreateAccount(true);
              }}
            />
          </div>
        </div>
      </p>

      <AdminAccount onRegister={onRegister} />
      <section
        id="main"
        style={{ width: 600, marginLeft: "auto", marginRight: "auto" }}
      >
        {!customers.length ? (
          <div></div>
        ) : (
          <article>
            <h2>{i18n.str`Accounts:`}</h2>
            <div class="results">
              <table class="pure-table pure-table-striped">
                <thead>
                  <tr>
                    <th>{i18n.str`Username`}</th>
                    <th>{i18n.str`Name`}</th>
                    <th>{i18n.str`Balance`}</th>
                    <th>{i18n.str`Actions`}</th>
                  </tr>
                </thead>
                <tbody>
                  {customers.map((item, idx) => {
                    const balance = !item.balance
                      ? undefined
                      : Amounts.parse(item.balance.amount);
                    const balanceIsDebit =
                      item.balance &&
                      item.balance.credit_debit_indicator == "debit";
                    return (
                      <tr key={idx}>
                        <td>
                          <a
                            href="#"
                            onClick={(e) => {
                              e.preventDefault();
                              setShowDetails(item.username);
                            }}
                          >
                            {item.username}
                          </a>
                        </td>
                        <td>{item.name}</td>
                        <td>
                          {!balance ? (
                            i18n.str`unknown`
                          ) : (
                            <span class="amount">
                              {balanceIsDebit ? <b>-</b> : null}
                              <span class="value">{`${Amounts.stringifyValue(
                                balance,
                              )}`}</span>
                              &nbsp;
                              <span class="currency">{`${balance.currency}`}</span>
                            </span>
                          )}
                        </td>
                        <td>
                          <a
                            href="#"
                            onClick={(e) => {
                              e.preventDefault();
                              setUpdatePassword(item.username);
                            }}
                          >
                            change password
                          </a>
                          &nbsp;
                          <a
                            href="#"
                            onClick={(e) => {
                              e.preventDefault();
                              setShowCashouts(item.username);
                            }}
                          >
                            cashouts
                          </a>
                          &nbsp;
                          <a
                            href="#"
                            onClick={(e) => {
                              e.preventDefault();
                              setRemoveAccount(item.username);
                            }}
                          >
                            remove
                          </a>
                        </td>
                      </tr>
                    );
                  })}
                </tbody>
              </table>
            </div>
          </article>
        )}
      </section>
    </Fragment>
  );
}

function AdminAccount({ onRegister }: { onRegister: () => void }): VNode {
  const { i18n } = useTranslationContext();
  const r = useBackendContext();
  const account = r.state.status === "loggedIn" ? r.state.username : "admin";
  const result = useAccountDetails(account);

  if (!result.ok) {
    return handleNotOkResult(i18n, onRegister)(result);
  }
  const { data } = result;
  const balance = Amounts.parseOrThrow(data.balance.amount);
  const debitThreshold = Amounts.parseOrThrow(result.data.debitThreshold);
  const balanceIsDebit = result.data.balance.credit_debit_indicator == "debit";
  const limit = balanceIsDebit
    ? Amounts.sub(debitThreshold, balance).amount
    : Amounts.add(balance, debitThreshold).amount;
  if (!balance) return <Fragment />;
  return (
    <Fragment>
      <section id="assets">
        <div class="asset-summary">
          <h2>{i18n.str`Bank account balance`}</h2>
          {!balance ? (
            <div class="large-amount" style={{ color: "gray" }}>
              Waiting server response...
            </div>
          ) : (
            <div class="large-amount amount">
              {balanceIsDebit ? <b>-</b> : null}
              <span class="value">{`${Amounts.stringifyValue(balance)}`}</span>
              &nbsp;
              <span class="currency">{`${balance.currency}`}</span>
            </div>
          )}
        </div>
      </section>
      <PaytoWireTransferForm
        focus
        limit={limit}
        onSuccess={() => {
          notifyInfo(i18n.str`Wire transfer created!`);
        }}
      />
    </Fragment>
  );
}

const IBAN_REGEX = /^[A-Z][A-Z0-9]*$/;
const EMAIL_REGEX =
  /^(([^<>()[\]\\.,;:\s@"]+(\.[^<>()[\]\\.,;:\s@"]+)*)|(".+"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}])|(([a-zA-Z\-0-9]+\.)+[a-zA-Z]{2,}))$/;
const REGEX_JUST_NUMBERS_REGEX = /^\+[0-9 ]*$/;

function initializeFromTemplate(
  account: SandboxBackend.Circuit.CircuitAccountData | undefined,
): WithIntermediate<SandboxBackend.Circuit.CircuitAccountData> {
  const emptyAccount = {
    cashout_address: undefined,
    iban: undefined,
    name: undefined,
    username: undefined,
    contact_data: undefined,
  };
  const emptyContact = {
    email: undefined,
    phone: undefined,
  };

  const initial: PartialButDefined<SandboxBackend.Circuit.CircuitAccountData> =
    structuredClone(account) ?? emptyAccount;
  if (typeof initial.contact_data === "undefined") {
    initial.contact_data = emptyContact;
  }
  initial.contact_data.email;
  return initial as any;
}

export function UpdateAccountPassword({
  account,
  onClear,
  onUpdateSuccess,
  onLoadNotOk,
}: {
  onLoadNotOk: <T>(
    error: HttpResponsePaginated<T, SandboxBackend.SandboxError>,
  ) => VNode;
  onClear: () => void;
  onUpdateSuccess: () => void;
  account: string;
}): VNode {
  const { i18n } = useTranslationContext();
  const result = useBusinessAccountDetails(account);
  const { changePassword } = useAdminAccountAPI();
  const [password, setPassword] = useState<string | undefined>();
  const [repeat, setRepeat] = useState<string | undefined>();
  const [error, saveError] = useState<ErrorMessage | undefined>();

  if (!result.ok) {
    if (result.loading || result.type === ErrorType.TIMEOUT) {
      return onLoadNotOk(result);
    }
    if (result.status === HttpStatusCode.NotFound) {
      return <div>account not found</div>;
    }
    return onLoadNotOk(result);
  }

  const errors = undefinedIfEmpty({
    password: !password ? i18n.str`required` : undefined,
    repeat: !repeat
      ? i18n.str`required`
      : password !== repeat
      ? i18n.str`password doesn't match`
      : undefined,
  });

  return (
    <div>
      <div>
        <h1 class="nav welcome-text">
          <i18n.Translate>Update password for {account}</i18n.Translate>
        </h1>
      </div>
      {error && (
        <ErrorBannerFloat error={error} onClear={() => saveError(undefined)} />
      )}

      <div style={{ maxWidth: 600, overflowX: "hidden", margin: "auto" }}>
        <form class="pure-form">
          <fieldset>
            <label>{i18n.str`Password`}</label>
            <input
              type="password"
              value={password ?? ""}
              onChange={(e) => {
                setPassword(e.currentTarget.value);
              }}
            />
            <ShowInputErrorLabel
              message={errors?.password}
              isDirty={password !== undefined}
            />
          </fieldset>
          <fieldset>
            <label>{i18n.str`Repeat password`}</label>
            <input
              type="password"
              value={repeat ?? ""}
              onChange={(e) => {
                setRepeat(e.currentTarget.value);
              }}
            />
            <ShowInputErrorLabel
              message={errors?.repeat}
              isDirty={repeat !== undefined}
            />
          </fieldset>
        </form>
        <p>
          <div style={{ display: "flex", justifyContent: "space-between" }}>
            <div>
              <input
                class="pure-button"
                type="submit"
                value={i18n.str`Close`}
                onClick={async (e) => {
                  e.preventDefault();
                  onClear();
                }}
              />
            </div>
            <div>
              <input
                id="select-exchange"
                class="pure-button pure-button-primary content"
                disabled={!!errors}
                type="submit"
                value={i18n.str`Confirm`}
                onClick={async (e) => {
                  e.preventDefault();
                  if (!!errors || !password) return;
                  try {
                    const r = await changePassword(account, {
                      new_password: password,
                    });
                    onUpdateSuccess();
                  } catch (error) {
                    if (error instanceof RequestError) {
                      saveError(buildRequestErrorMessage(i18n, error.cause));
                    } else {
                      saveError({
                        title: i18n.str`Operation failed, please report`,
                        description:
                          error instanceof Error
                            ? error.message
                            : JSON.stringify(error),
                      });
                    }
                  }
                }}
              />
            </div>
          </div>
        </p>
      </div>
    </div>
  );
}

function CreateNewAccount({
  onClose,
  onCreateSuccess,
}: {
  onClose: () => void;
  onCreateSuccess: (password: string) => void;
}): VNode {
  const { i18n } = useTranslationContext();
  const { createAccount } = useAdminAccountAPI();
  const [submitAccount, setSubmitAccount] = useState<
    SandboxBackend.Circuit.CircuitAccountData | undefined
  >();
  const [error, saveError] = useState<ErrorMessage | undefined>();
  return (
    <div>
      <div>
        <h1 class="nav welcome-text">
          <i18n.Translate>New account</i18n.Translate>
        </h1>
      </div>
      {error && (
        <ErrorBannerFloat error={error} onClear={() => saveError(undefined)} />
      )}

      <div style={{ maxWidth: 600, overflowX: "hidden", margin: "auto" }}>
        <AccountForm
          template={undefined}
          purpose="create"
          onChange={(a) => {
            setSubmitAccount(a);
          }}
        />

        <p>
          <div style={{ display: "flex", justifyContent: "space-between" }}>
            <div>
              <input
                class="pure-button"
                type="submit"
                value={i18n.str`Close`}
                onClick={async (e) => {
                  e.preventDefault();
                  onClose();
                }}
              />
            </div>
            <div>
              <input
                id="select-exchange"
                class="pure-button pure-button-primary content"
                disabled={!submitAccount}
                type="submit"
                value={i18n.str`Confirm`}
                onClick={async (e) => {
                  e.preventDefault();

                  if (!submitAccount) return;
                  try {
                    const account: SandboxBackend.Circuit.CircuitAccountRequest =
                      {
                        cashout_address: submitAccount.cashout_address,
                        contact_data: submitAccount.contact_data,
                        internal_iban: submitAccount.iban,
                        name: submitAccount.name,
                        username: submitAccount.username,
                        password: randomPassword(),
                      };

                    await createAccount(account);
                    onCreateSuccess(account.password);
                  } catch (error) {
                    if (error instanceof RequestError) {
                      saveError(
                        buildRequestErrorMessage(i18n, error.cause, {
                          onClientError: (status) =>
                            status === HttpStatusCode.Forbidden
                              ? i18n.str`The rights to perform the operation are not sufficient`
                              : status === HttpStatusCode.BadRequest
                              ? i18n.str`Input data was invalid`
                              : status === HttpStatusCode.Conflict
                              ? i18n.str`At least one registration detail was not available`
                              : undefined,
                        }),
                      );
                    } else {
                      saveError({
                        title: i18n.str`Operation failed, please report`,
                        description:
                          error instanceof Error
                            ? error.message
                            : JSON.stringify(error),
                      });
                    }
                  }
                }}
              />
            </div>
          </div>
        </p>
      </div>
    </div>
  );
}

export function ShowAccountDetails({
  account,
  onClear,
  onUpdateSuccess,
  onLoadNotOk,
  onChangePassword,
}: {
  onLoadNotOk: <T>(
    error: HttpResponsePaginated<T, SandboxBackend.SandboxError>,
  ) => VNode;
  onClear?: () => void;
  onChangePassword: () => void;
  onUpdateSuccess: () => void;
  account: string;
}): VNode {
  const { i18n } = useTranslationContext();
  const result = useBusinessAccountDetails(account);
  const { updateAccount } = useAdminAccountAPI();
  const [update, setUpdate] = useState(false);
  const [submitAccount, setSubmitAccount] = useState<
    SandboxBackend.Circuit.CircuitAccountData | undefined
  >();
  const [error, saveError] = useState<ErrorMessage | undefined>();

  if (!result.ok) {
    if (result.loading || result.type === ErrorType.TIMEOUT) {
      return onLoadNotOk(result);
    }
    if (result.status === HttpStatusCode.NotFound) {
      return <div>account not found</div>;
    }
    return onLoadNotOk(result);
  }

  return (
    <div>
      <div>
        <h1 class="nav welcome-text">
          <i18n.Translate>Business account details</i18n.Translate>
        </h1>
      </div>
      {error && (
        <ErrorBannerFloat error={error} onClear={() => saveError(undefined)} />
      )}
      <div style={{ maxWidth: 600, overflowX: "hidden", margin: "auto" }}>
        <AccountForm
          template={result.data}
          purpose={update ? "update" : "show"}
          onChange={(a) => setSubmitAccount(a)}
        />

        <p>
          <div style={{ display: "flex", justifyContent: "space-between" }}>
            <div>
              {onClear ? (
                <input
                  class="pure-button"
                  type="submit"
                  value={i18n.str`Close`}
                  onClick={async (e) => {
                    e.preventDefault();
                    onClear();
                  }}
                />
              ) : undefined}
            </div>
            <div style={{ display: "flex" }}>
              <div>
                <input
                  id="select-exchange"
                  class="pure-button pure-button-primary content"
                  disabled={update && !submitAccount}
                  type="submit"
                  value={i18n.str`Change password`}
                  onClick={async (e) => {
                    e.preventDefault();
                    onChangePassword();
                  }}
                />
              </div>
              <div>
                <input
                  id="select-exchange"
                  class="pure-button pure-button-primary content"
                  disabled={update && !submitAccount}
                  type="submit"
                  value={update ? i18n.str`Confirm` : i18n.str`Update`}
                  onClick={async (e) => {
                    e.preventDefault();

                    if (!update) {
                      setUpdate(true);
                    } else {
                      if (!submitAccount) return;
                      try {
                        await updateAccount(account, {
                          cashout_address: submitAccount.cashout_address,
                          contact_data: submitAccount.contact_data,
                        });
                        onUpdateSuccess();
                      } catch (error) {
                        if (error instanceof RequestError) {
                          saveError(
                            buildRequestErrorMessage(i18n, error.cause, {
                              onClientError: (status) =>
                                status === HttpStatusCode.Forbidden
                                  ? i18n.str`The rights to change the account are not sufficient`
                                  : status === HttpStatusCode.NotFound
                                  ? i18n.str`The username was not found`
                                  : undefined,
                            }),
                          );
                        } else {
                          saveError({
                            title: i18n.str`Operation failed, please report`,
                            description:
                              error instanceof Error
                                ? error.message
                                : JSON.stringify(error),
                          });
                        }
                      }
                    }
                  }}
                />
              </div>
            </div>
          </div>
        </p>
      </div>
    </div>
  );
}

function RemoveAccount({
  account,
  onClear,
  onUpdateSuccess,
  onLoadNotOk,
}: {
  onLoadNotOk: <T>(
    error: HttpResponsePaginated<T, SandboxBackend.SandboxError>,
  ) => VNode;
  onClear: () => void;
  onUpdateSuccess: () => void;
  account: string;
}): VNode {
  const { i18n } = useTranslationContext();
  const result = useAccountDetails(account);
  const { deleteAccount } = useAdminAccountAPI();
  const [error, saveError] = useState<ErrorMessage | undefined>();

  if (!result.ok) {
    if (result.loading || result.type === ErrorType.TIMEOUT) {
      return onLoadNotOk(result);
    }
    if (result.status === HttpStatusCode.NotFound) {
      return <div>account not found</div>;
    }
    return onLoadNotOk(result);
  }

  const balance = Amounts.parse(result.data.balance.amount);
  if (!balance) {
    return <div>there was an error reading the balance</div>;
  }
  const isBalanceEmpty = Amounts.isZero(balance);
  return (
    <div>
      <div>
        <h1 class="nav welcome-text">
          <i18n.Translate>Remove account: {account}</i18n.Translate>
        </h1>
      </div>
      {!isBalanceEmpty && (
        <ErrorBannerFloat
          error={{
            title: i18n.str`Can't delete the account`,
            description: i18n.str`Balance is not empty`,
          }}
          onClear={() => saveError(undefined)}
        />
      )}
      {error && (
        <ErrorBannerFloat error={error} onClear={() => saveError(undefined)} />
      )}

      <p>
        <div style={{ display: "flex", justifyContent: "space-between" }}>
          <div>
            <input
              class="pure-button"
              type="submit"
              value={i18n.str`Cancel`}
              onClick={async (e) => {
                e.preventDefault();
                onClear();
              }}
            />
          </div>
          <div>
            <input
              id="select-exchange"
              class="pure-button pure-button-primary content"
              disabled={!isBalanceEmpty}
              type="submit"
              value={i18n.str`Confirm`}
              onClick={async (e) => {
                e.preventDefault();
                try {
                  const r = await deleteAccount(account);
                  onUpdateSuccess();
                } catch (error) {
                  if (error instanceof RequestError) {
                    saveError(
                      buildRequestErrorMessage(i18n, error.cause, {
                        onClientError: (status) =>
                          status === HttpStatusCode.Forbidden
                            ? i18n.str`The administrator specified a institutional username`
                            : status === HttpStatusCode.NotFound
                            ? i18n.str`The username was not found`
                            : status === HttpStatusCode.PreconditionFailed
                            ? i18n.str`Balance was not zero`
                            : undefined,
                      }),
                    );
                  } else {
                    saveError({
                      title: i18n.str`Operation failed, please report`,
                      description:
                        error instanceof Error
                          ? error.message
                          : JSON.stringify(error),
                    });
                  }
                }
              }}
            />
          </div>
        </div>
      </p>
    </div>
  );
}
/**
 * Create valid account object to update or create
 * Take template as initial values for the form
 * Purpose indicate if all field al read only (show), part of them (update)
 * or none (create)
 * @param param0
 * @returns
 */
function AccountForm({
  template,
  purpose,
  onChange,
}: {
  template: SandboxBackend.Circuit.CircuitAccountData | undefined;
  onChange: (a: SandboxBackend.Circuit.CircuitAccountData | undefined) => void;
  purpose: "create" | "update" | "show";
}): VNode {
  const initial = initializeFromTemplate(template);
  const [form, setForm] = useState(initial);
  const [errors, setErrors] = useState<
    RecursivePartial<typeof initial> | undefined
  >(undefined);
  const { i18n } = useTranslationContext();

  function updateForm(newForm: typeof initial): void {
    const parsed = !newForm.cashout_address
      ? undefined
      : parsePaytoUri(newForm.cashout_address);

    const errors = undefinedIfEmpty<RecursivePartial<typeof initial>>({
      cashout_address: !newForm.cashout_address
        ? i18n.str`required`
        : !parsed
        ? i18n.str`does not follow the pattern`
        : !parsed.isKnown || parsed.targetType !== "iban"
        ? i18n.str`only "IBAN" target are supported`
        : !IBAN_REGEX.test(parsed.iban)
        ? i18n.str`IBAN should have just uppercased letters and numbers`
        : validateIBAN(parsed.iban, i18n),
      contact_data: undefinedIfEmpty({
        email: !newForm.contact_data?.email
          ? i18n.str`required`
          : !EMAIL_REGEX.test(newForm.contact_data.email)
          ? i18n.str`it should be an email`
          : undefined,
        phone: !newForm.contact_data?.phone
          ? i18n.str`required`
          : !newForm.contact_data.phone.startsWith("+")
          ? i18n.str`should start with +`
          : !REGEX_JUST_NUMBERS_REGEX.test(newForm.contact_data.phone)
          ? i18n.str`phone number can't have other than numbers`
          : undefined,
      }),
      iban: !newForm.iban
        ? undefined //optional field
        : !IBAN_REGEX.test(newForm.iban)
        ? i18n.str`IBAN should have just uppercased letters and numbers`
        : validateIBAN(newForm.iban, i18n),
      name: !newForm.name ? i18n.str`required` : undefined,
      username: !newForm.username ? i18n.str`required` : undefined,
    });
    setErrors(errors);
    setForm(newForm);
    onChange(errors === undefined ? (newForm as any) : undefined);
  }

  return (
    <form class="pure-form">
      <fieldset>
        <label for="username">
          {i18n.str`Username`}
          {purpose === "create" && <b style={{ color: "red" }}>*</b>}
        </label>
        <input
          name="username"
          type="text"
          disabled={purpose !== "create"}
          value={form.username}
          onChange={(e) => {
            form.username = e.currentTarget.value;
            updateForm(structuredClone(form));
          }}
        />{" "}
        <ShowInputErrorLabel
          message={errors?.username}
          isDirty={form.username !== undefined}
        />
      </fieldset>
      <fieldset>
        <label>
          {i18n.str`Name`}
          {purpose === "create" && <b style={{ color: "red" }}>*</b>}
        </label>
        <input
          disabled={purpose !== "create"}
          value={form.name ?? ""}
          onChange={(e) => {
            form.name = e.currentTarget.value;
            updateForm(structuredClone(form));
          }}
        />
        <ShowInputErrorLabel
          message={errors?.name}
          isDirty={form.name !== undefined}
        />
      </fieldset>
      {purpose !== "create" && (
        <fieldset>
          <label>{i18n.str`Internal IBAN`}</label>
          <input
            disabled={true}
            value={form.iban ?? ""}
            onChange={(e) => {
              form.iban = e.currentTarget.value;
              updateForm(structuredClone(form));
            }}
          />
          <ShowInputErrorLabel
            message={errors?.iban}
            isDirty={form.iban !== undefined}
          />
        </fieldset>
      )}
      <fieldset>
        <label>
          {i18n.str`Email`}
          {purpose !== "show" && <b style={{ color: "red" }}>*</b>}
        </label>
        <input
          disabled={purpose === "show"}
          value={form.contact_data.email ?? ""}
          onChange={(e) => {
            form.contact_data.email = e.currentTarget.value;
            updateForm(structuredClone(form));
          }}
        />
        <ShowInputErrorLabel
          message={errors?.contact_data?.email}
          isDirty={form.contact_data.email !== undefined}
        />
      </fieldset>
      <fieldset>
        <label>
          {i18n.str`Phone`}
          {purpose !== "show" && <b style={{ color: "red" }}>*</b>}
        </label>
        <input
          disabled={purpose === "show"}
          value={form.contact_data.phone ?? ""}
          onChange={(e) => {
            form.contact_data.phone = e.currentTarget.value;
            updateForm(structuredClone(form));
          }}
        />
        <ShowInputErrorLabel
          message={errors?.contact_data?.phone}
          isDirty={form.contact_data?.phone !== undefined}
        />
      </fieldset>
      <fieldset>
        <label>
          {i18n.str`Cashout address`}
          {purpose !== "show" && <b style={{ color: "red" }}>*</b>}
        </label>
        <input
          disabled={purpose === "show"}
          value={(form.cashout_address ?? "").substring("payto://iban/".length)}
          onChange={(e) => {
            form.cashout_address = "payto://iban/" + e.currentTarget.value;
            updateForm(structuredClone(form));
          }}
        />
        <ShowInputErrorLabel
          message={errors?.cashout_address}
          isDirty={form.cashout_address !== undefined}
        />
      </fieldset>
    </form>
  );
}