import { db } from '$lib/server/db';
import { sql } from 'drizzle-orm';
import type { PageServerLoad } from './$types';

export const load: PageServerLoad = async () => {
	const [stats, dimensions, markets] = await Promise.all([
		db.execute(sql`SELECT
			(SELECT count(*)::int FROM cs_market_items) AS items,
			(SELECT greatest(reltuples::bigint, 0) FROM pg_class WHERE oid = 'cs_price_observations'::regclass) AS observations,
			(SELECT min(observed_at) FROM cs_price_observations) AS earliest,
			(SELECT max(observed_at) FROM cs_price_observations) AS latest`),
		db.execute(sql`SELECT key, count(DISTINCT value)::int AS values
			FROM cs_item_dimensions GROUP BY key ORDER BY key`),
		db.execute(sql`SELECT source, currency, kind FROM cs_price_streams ORDER BY 1, 2, 3`)
	]);
	return {
		stats: stats[0] as {
			items: number;
			observations: string;
			earliest: Date | null;
			latest: Date | null;
		},
		dimensions: dimensions as unknown as { key: string; values: number }[],
		markets: markets as unknown as { source: string; currency: string; kind: string }[]
	};
};