/*
 This file is part of GNU Taler
 (C) 2021 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 { h, VNode } from "preact";
import { useState } from "preact/hooks";
import { AsyncButton } from "../../../../components/exception/AsyncButton";
import { FormErrors, FormProvider } from "../../../../components/form/FormProvider";
import { Input } from "../../../../components/form/Input";
import { InputCurrency } from "../../../../components/form/InputCurrency";
import { InputPayto } from "../../../../components/form/InputPayto";
import { InputSelector } from "../../../../components/form/InputSelector";
import { InputWithAddon } from "../../../../components/form/InputWithAddon";
import { useConfigContext } from "../../../../context/config";
import { MerchantBackend } from "../../../../declaration";
import { useInstanceDetails } from "../../../../hooks/instance";
import { Translate, useTranslator } from "../../../../i18n";
import { CROCKFORD_BASE32_REGEX, URL_REGEX } from "../../../../utils/constants";

type Entity = MerchantBackend.Transfers.TransferInformation

interface Props {
  onCreate: (d: Entity) => Promise<void>;
  onBack?: () => void;
  accounts: string[],
}

export function CreatePage({ accounts, onCreate, onBack }: Props): VNode {
  const i18n = useTranslator()
  const { currency } = useConfigContext()

  const [state, setState] = useState<Partial<Entity>>({
    wtid: '',
    // payto_uri: ,
    // exchange_url: 'http://exchange.taler:8081/',
    credit_amount: ``,
  });

  const errors: FormErrors<Entity> = {
    wtid: !state.wtid ? i18n`cannot be empty` :
      (!CROCKFORD_BASE32_REGEX.test(state.wtid) ? i18n`check the id, does not look valid` :
        (state.wtid.length !== 52 ? i18n`should have 52 characters, current ${state.wtid.length}` :
          undefined)),
    payto_uri: !state.payto_uri ? i18n`cannot be empty` : undefined,
    credit_amount: !state.credit_amount ? i18n`cannot be empty` : undefined,
    exchange_url: !state.exchange_url ? i18n`cannot be empty` :
      (!URL_REGEX.test(state.exchange_url) ? i18n`URL doesn't have the right format` : undefined),
  }

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

  const submitForm = () => {
    if (hasErrors) return Promise.reject()
    return onCreate(state as any)
  }

  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}>
            <Input<Entity> name="wtid" label={i18n`Transfer ID`} help="" tooltip={i18n`unique identifier of the wire transfer, usually 52 random characters long`} />
            <InputSelector name="payto_uri" label={i18n`Address`}
              values={accounts}
              placeholder={i18n`Select one account`}
              tooltip={i18n`filter by account address`}
            />
            <Input<Entity> name="exchange_url"
              label={i18n`Exchange URL`}
              tooltip={i18n`exchange that made the transfer`}
              help="http://exchange.taler:8081/" />
            <InputCurrency<Entity> name="credit_amount" label={i18n`Amount`} tooltip={i18n`how much money transferred into the account`} />

          </FormProvider>

          <div class="buttons is-right mt-5">
            {onBack && <button class="button" onClick={onBack} ><Translate>Cancel</Translate></button>}
            <AsyncButton disabled={hasErrors} data-tooltip={
              hasErrors ? i18n`Need to complete fields marked with a star` : 'confirm operation'
            } onClick={submitForm} ><Translate>Confirm</Translate></AsyncButton>
          </div>

        </div>
        <div class="column" />
      </div>
    </section>
  </div>
}