import type { Metadata } from 'next';
import { t } from '@/i18n';
import { api, isNotBuilt, safe } from '@/lib/api';
import { apiAnalytics } from '@/lib/api-analytics';
import { apiExplore } from '@/lib/api-explore';
import { parseFinderState } from '@/lib/finder-query';
import { routes } from '@/lib/site';
import type { FormatSpec } from '@/lib/types';
import { NotBuiltState } from '@/components/data/empty-state';
import { FinderView } from '@/components/explorer/finder-view';
import { explorerIndicators, type SP } from '@/components/explorer/options';
import { baseFeatures } from '@/components/indicators/map-geometry';

export const revalidate = 900;

export async function generateMetadata({ searchParams }: { searchParams: Promise<SP> }): Promise<Metadata> {
  const sp = await searchParams;
  return {
    title: t('finder.metaTitle'),
    description: t('finder.description'),
    alternates: { canonical: routes.finder() },
    robots: Object.keys(sp).length ? { index: false, follow: true } : undefined,
    openGraph: { title: `${t('finder.metaTitle')} — ${t('site.name')}`, description: t('finder.description'), url: routes.finder(), type: 'website' },
  };
}

export default async function FinderPage({ searchParams }: { searchParams: Promise<SP> }) {
  const state = parseFinderState(await searchParams);
  let indicatorsRes;
  try {
    indicatorsRes = await apiExplore.indicators({ with_data: true });
  } catch (e) {
    if (isNotBuilt(e)) return <NotBuiltState />;
    throw e;
  }
  const [countriesRes, result] = await Promise.all([safe(api.countries()), state.filters.length ? safe(apiAnalytics.finder(state.filters, { mode: state.mode, region: state.region, income: state.income, sort: state.sort, limit: 218 })) : Promise.resolve(null)]);
  const { features, sphere } = baseFeatures(countriesRes?.items ?? []);
  const specs: Record<string, FormatSpec> = Object.fromEntries(indicatorsRes.items.map((i) => [i.slug, { format: i.format, unit: i.unit, unit_short: i.unit_short, precision: i.precision, frequency: i.frequency, name: i.short_name ?? i.name, higher_is_better: i.higher_is_better }]));
  return <FinderView indicators={explorerIndicators(indicatorsRes.items, 10)} features={features} sphere={sphere} initial={result} initialState={state} specs={specs} />;
}