import { useState } from 'react';
import { useRouter } from 'next/router';
import clsx from 'clsx';
import { Card } from '@/components/card';
import { CursorEffect } from '@/components/cursor';
import Star from '@/assets/images/thick-round-star-6.svg';
import NoteIcon from '@/assets/icons/note.svg';
import type { Alerts, City } from '@/lib/ridebus';
import useLocale from '@/utils/useLocale';
import { SelectMenu } from '../departuresCard/selectMenu';
import { useResource } from '../departuresCard/useResource';
import { locales } from './locales';
import styles from './changesCard.module.scss';

export function ChangesCard() {
  const t = useLocale(locales);
  const { locale } = useRouter();
  const [revision, setRevision] = useState(0);
  const [chosenCity, setChosenCity] = useState('');
  const [expanded, setExpanded] = useState(false);
  const cities = useResource<City[]>(
    '/api/departures?resource=cities',
    revision
  );
  const cityId = String(
    cities.data?.find((city) => String(city.id) === chosenCity)?.id ??
      cities.data?.find((city) => city.slug === 'polotsk')?.id ??
      cities.data?.[0]?.id ??
      ''
  );
  const notices = useResource<Alerts>(
    cityId ? `/api/departures?resource=alerts&cityId=${cityId}` : null,
    revision,
    true
  );
  const failed = cities.status === 'error' || notices.status === 'error';
  const loading = cities.status === 'loading' || notices.status === 'loading';
  const alerts = notices.data?.alerts ?? [];
  const dateFormat = new Intl.DateTimeFormat(
    locale === 'ru' ? 'ru-BY' : 'en-GB',
    {
      day: 'numeric',
      month: 'short',
      year: 'numeric',
      timeZone: 'Europe/Minsk',
    }
  );
  const updateTime = notices.data
    ? new Intl.DateTimeFormat(locale === 'ru' ? 'ru-BY' : 'en-GB', {
        hour: '2-digit',
        minute: '2-digit',
        timeZone: 'Europe/Minsk',
      }).format(new Date(notices.data.updatedAt))
    : '';

  return (
    <section aria-label={t('title')}>
      <Card
        className={styles.card}
        title={t('title')}
        subtitle={t('description')}
        classes={{ content: styles.content }}
      >
        <Star className={styles.star} aria-hidden="true" />
        <div className={styles.layout}>
          <div className={styles.controls}>
            <SelectMenu
              label={t('city')}
              value={cityId}
              options={
                cities.data?.map((city) => ({
                  value: String(city.id),
                  label: city.name,
                })) ?? []
              }
              placeholder={
                cities.status === 'loading'
                  ? t('loadingCities')
                  : t('selectCity')
              }
              searchLabel={t('searchCity')}
              noResults={t('noResults')}
              onChange={(value) => {
                setChosenCity(value);
                setExpanded(false);
              }}
            />
            <p className={styles.note}>{t('note')}</p>
            {updateTime && !failed && !loading && (
              <p className={styles.updated}>
                {t('updated')} {updateTime}
              </p>
            )}
          </div>
          <div
            className={styles.notices}
            aria-live="polite"
            aria-busy={loading}
          >
            {failed || loading || !cities.data?.length ? (
              <div className={styles.state}>
                {loading && (
                  <div className={styles.loadingDots} aria-hidden="true">
                    <i />
                    <i />
                    <i />
                  </div>
                )}
                <p>
                  {t(failed ? 'unavailable' : loading ? 'loading' : 'noCities')}
                </p>
                {failed && (
                  <CursorEffect cursorBorderRadius={16} cursorPadding={4}>
                    <button
                      type="button"
                      className={styles.action}
                      onClick={() => setRevision((r) => r + 1)}
                    >
                      {t('retry')}
                    </button>
                  </CursorEffect>
                )}
              </div>
            ) : alerts.length ? (
              <>
                {(expanded ? alerts : alerts.slice(0, 3)).map((alert) => (
                  <article
                    className={styles.notice}
                    key={`${cityId}:${alert.id}`}
                  >
                    <div className={styles.badges}>
                      <span className={clsx(styles.type, styles[alert.type])}>
                        {t(alert.type)}
                      </span>
                      {alert.routeNumber && (
                        <span className={styles.route}>
                          {t('route')} №{alert.routeNumber}
                        </span>
                      )}
                    </div>
                    <h4>{alert.title}</h4>
                    <p className={styles.message}>{alert.message}</p>
                    <div className={styles.dates}>
                      <span>
                        {t('published')}{' '}
                        <time dateTime={alert.createdAt}>
                          {dateFormat.format(new Date(alert.createdAt))}
                        </time>
                      </span>
                      {alert.endTime && (
                        <span>
                          {t('until')}{' '}
                          <time dateTime={alert.endTime}>
                            {dateFormat.format(new Date(alert.endTime))}
                          </time>
                        </span>
                      )}
                    </div>
                  </article>
                ))}
                {alerts.length > 3 && (
                  <CursorEffect cursorBorderRadius={16} cursorPadding={4}>
                    <button
                      type="button"
                      className={styles.action}
                      aria-expanded={expanded}
                      onClick={() => setExpanded((value) => !value)}
                    >
                      {t(expanded ? 'showLess' : 'showAll')}
                      {!expanded && ` (${alerts.length})`}
                    </button>
                  </CursorEffect>
                )}
              </>
            ) : (
              <div className={styles.state} key={cityId}>
                <span className={styles.emptyIcon} aria-hidden="true">
                  <NoteIcon />
                </span>
                <h4>{t('emptyTitle')}</h4>
                <p>{t('emptyDescription')}</p>
              </div>
            )}
          </div>
        </div>
      </Card>
    </section>
  );
}