import {useState} from 'react';
import styled from '@emotion/styled';
import {motion} from 'framer-motion';

import {addErrorMessage} from 'sentry/actionCreators/indicator';
import SelectControl from 'sentry/components/forms/controls/selectControl';
import Input from 'sentry/components/input';
import {t} from 'sentry/locale';
import ConfigStore from 'sentry/stores/configStore';
import {space} from 'sentry/styles/space';
import testableTransition from 'sentry/utils/testableTransition';
import useApi from 'sentry/utils/useApi';
import ContinueButton from 'sentry/views/relocation/components/continueButton';
import StepHeading from 'sentry/views/relocation/components/stepHeading';

import type {StepProps} from './types';

const PROMO_CODE_ERROR_MSG = t(
  'That promotional code has already been claimed, does not have enough remaining uses, is no longer valid, or never existed.'
);

// Best-effort region name prettification.
function prettyRegionName(name: string): string {
  if (name === 'de') {
    return '🇪🇺 European Union (EU)';
  }
  if (name === 'us') {
    return '🇺🇸 United States of America (US)';
  }
  return name;
}

function GetStarted({relocationState, onUpdateRelocationState, onComplete}: StepProps) {
  const api = useApi();
  const {orgSlugs, regionUrl, promoCode} = relocationState;
  const [showPromoCode, setShowPromoCode] = useState(!!promoCode);
  const selectableRegions = ConfigStore.get('relocationConfig')?.selectableRegions || [];
  const regions = ConfigStore.get('regions').filter(region =>
    selectableRegions.includes(region.name)
  );

  const handleContinue = async (event: any) => {
    event.preventDefault();
    if (promoCode) {
      try {
        await api.requestPromise(`/promocodes-external/${promoCode}`, {
          method: 'GET',
        });
      } catch (error) {
        if (error.status === 403) {
          addErrorMessage(PROMO_CODE_ERROR_MSG);
          return;
        }
      }
    }
    onComplete();
  };
  return (
    <Wrapper data-test-id="get-started">
      <StepHeading step={1}>{t('Basic information needed to get started')}</StepHeading>
      <motion.div
        transition={testableTransition()}
        variants={{
          initial: {y: 30, opacity: 0},
          animate: {y: 0, opacity: 1},
          exit: {opacity: 0},
        }}
      >
        <Form onSubmit={handleContinue}>
          <p>
            {t(
              'In order to best facilitate the process some basic information will be required to ensure success with the relocation process of you self-hosted instance'
            )}
          </p>
          <RequiredLabel>{t('Organization slugs being relocated')}</RequiredLabel>
          <Input
            type="text"
            name="orgs"
            aria-label={t('org-slugs')}
            onChange={evt => {
              onUpdateRelocationState({orgSlugs: evt.target.value});
            }}
            required
            minLength={3}
            placeholder="org-slug-1, org-slug-2, ..."
            value={orgSlugs}
          />
          <Label>{t('Choose a datacenter location')}</Label>
          <RegionSelect
            value={regionUrl}
            name="region"
            aria-label={t('region')}
            placeholder="Select Location"
            options={regions.map(r => ({label: prettyRegionName(r.name), value: r.url}))}
            onChange={opt => {
              onUpdateRelocationState({regionUrl: opt.value});
            }}
          />
          {regionUrl && (
            <p>{t('This is an important decision and cannot be changed.')}</p>
          )}
          <DatacenterTextBlock>
            {t(
              "Choose where to store your organization's data. Please note, you won't be able to change locations once your relocation has been initiated. "
            )}
            <a
              href="https://docs.sentry.io/product/accounts/choose-your-data-center"
              target="_blank"
              rel="noreferrer"
            >
              Learn more
            </a>
            .
          </DatacenterTextBlock>
          {showPromoCode ? (
            <div>
              <Label>{t('Promo Code')}</Label>
              <PromoCodeInput
                type="text"
                name="promocode"
                aria-label={t('promocode')}
                onChange={evt => {
                  onUpdateRelocationState({promoCode: evt.target.value});
                }}
                placeholder=""
                value={promoCode}
              />
            </div>
          ) : (
            <TogglePromoCode onClick={() => setShowPromoCode(true)}>
              Got a promo code? <u>Click here to redeem it!</u>
            </TogglePromoCode>
          )}
          <ContinueButton
            disabled={!orgSlugs || !regionUrl}
            priority="primary"
            type="submit"
          />
        </Form>
      </motion.div>
    </Wrapper>
  );
}

export default GetStarted;

const Wrapper = styled('div')`
  margin-left: auto;
  margin-right: auto;
  padding: ${space(4)};
  background-color: ${p => p.theme.surface400};
  z-index: 100;
  box-shadow: 0 5px 10px rgba(0, 0, 0, 0.05);
  border-radius: 10px;
  max-width: 769px;
  max-height: 525px;
  color: ${p => p.theme.gray300};
  h2 {
    color: ${p => p.theme.gray500};
  }
`;

const Form = styled('form')`
  position: relative;
`;

const Label = styled('label')`
  display: block;
  text-transform: uppercase;
  color: ${p => p.theme.gray500};
  margin-top: ${space(2)};
`;

const RequiredLabel = styled('label')`
  display: block;
  text-transform: uppercase;
  color: ${p => p.theme.gray500};
  margin-top: ${space(2)};
  &:after {
    content: '•';
    width: 6px;
    color: ${p => p.theme.red300};
  }
`;

const RegionSelect = styled(SelectControl)`
  button {
    width: 709px;
  }
`;

const PromoCodeInput = styled(Input)`
  padding-bottom: ${space(2)};
`;

const TogglePromoCode = styled('a')`
  display: block;
  cursor: pointer;
  padding-bottom: ${space(2)};
`;

const DatacenterTextBlock = styled('p')`
  margin-top: ${space(1)};
`;