// @flow
import { Form } from 'component/common/form';
import { Lbryio } from 'lbryinc';
import * as PAGES from 'constants/pages';
import Button from 'component/button';
import Card from 'component/common/card';
import React from 'react';

import { getStripeEnvironment } from 'util/stripe';
const stripeEnvironment = getStripeEnvironment();

type TipParams = { tipAmount: number, tipChannelName: string, channelClaimId: string };
type UserParams = { activeChannelName: ?string, activeChannelId: ?string };

type Props = {
  activeChannelId?: string,
  activeChannelName?: string,
  claimId: string,
  claimType?: string,
  channelClaimId?: string,
  tipChannelName?: string,
  claimIsMine: boolean,
  isSupport: boolean,
  isTipOnly?: boolean,
  customText?: string,
  doHideModal: () => void,
  setAmount?: (number) => void,
  preferredCurrency: string,
  preOrderPurchase: (
    TipParams,
    anonymous: boolean,
    UserParams,
    claimId: string,
    stripe: ?string,
    preferredCurrency: string,
    ?(any) => Promise<void>,
    ?(any) => void
  ) => void,
  preorderTag: string,
  checkIfAlreadyPurchased: () => void,
};

export default function PreorderContent(props: Props) {
  const {
    activeChannelId,
    activeChannelName,
    claimId,
    channelClaimId,
    tipChannelName,
    doHideModal,
    preOrderPurchase,
    preferredCurrency,
    preorderTag,
    checkIfAlreadyPurchased,
  } = props;

  // set the purchase amount once the preorder tag is selected
  React.useEffect(() => {
    setTipAmount(Number(preorderTag));
  }, [preorderTag]);

  /** STATE **/
  const [tipAmount, setTipAmount] = React.useState(0);

  const [waitingForBackend, setWaitingForBackend] = React.useState(false);

  const [hasCardSaved, setHasSavedCard] = React.useState(true);

  // check if user has a payment method saved
  React.useEffect(() => {
    if (!stripeEnvironment) return;

    Lbryio.call(
      'customer',
      'status',
      {
        environment: stripeEnvironment,
      },
      'post'
    ).then((customerStatusResponse) => {
      const defaultPaymentMethodId =
        customerStatusResponse.Customer &&
        customerStatusResponse.Customer.invoice_settings &&
        customerStatusResponse.Customer.invoice_settings.default_payment_method &&
        customerStatusResponse.Customer.invoice_settings.default_payment_method.id;

      setHasSavedCard(Boolean(defaultPaymentMethodId));
    });
  }, [setHasSavedCard]);

  // text for modal header
  const titleText = 'Preorder Your Content';

  // icon to use or explainer text to show per tab
  let explainerText =
    'This content is not available yet but you' + ' can pre-order it now so you can access it as soon as it goes live';

  // when the form button is clicked
  function handleSubmit() {
    const tipParams: TipParams = {
      tipAmount,
      tipChannelName: tipChannelName || '',
      channelClaimId: channelClaimId || '',
    };
    const userParams: UserParams = { activeChannelName, activeChannelId };

    async function checkIfFinished() {
      await checkIfAlreadyPurchased();
      doHideModal();
    }

    setWaitingForBackend(true);

    // hit backend to send tip
    preOrderPurchase(
      tipParams,
      !activeChannelId,
      userParams,
      claimId,
      stripeEnvironment,
      preferredCurrency,
      checkIfFinished,
      doHideModal
    );
  }

  let fiatSymbolToUse = '$';
  if (preferredCurrency === 'EUR') {
    fiatSymbolToUse = '€';
  }

  function buildButtonText() {
    return `Preorder your content for ${fiatSymbolToUse}${tipAmount.toString()}`;
  }

  return (
    <Form onSubmit={handleSubmit}>
      {!waitingForBackend && (
        <Card
          title={titleText}
          className={'preorder-content-modal'}
          subtitle={
            <>
              {/* short explainer under the button */}
              <div className="section__subtitle">{explainerText}</div>
            </>
          }
          actions={
            // confirm purchase card
            <>
              {/*  */}
              <div className="handle-submit-area">
                <Button
                  autoFocus
                  onClick={handleSubmit}
                  button="primary"
                  // label={__('Confirm')}
                  label={buildButtonText()}
                  disabled={!hasCardSaved}
                />

                {!hasCardSaved && (
                  <>
                    <div className="add-card-prompt">
                      <Button navigate={`/$/${PAGES.SETTINGS_STRIPE_CARD}`} label={__('Add a Card')} button="link" />
                      {' ' + __('To Preorder Content')}
                    </div>
                  </>
                )}
              </div>
            </>
          }
        />
      )}
      {/* processing payment card */}
      {waitingForBackend && (
        <Card
          title={titleText}
          className={'preorder-content-modal-loading'}
          subtitle={
            <>
              {/* short explainer under the button */}
              <div className="section__subtitle">{'Processing your purchase...'}</div>
            </>
          }
        />
      )}
    </Form>
  );
}