import { redirect } from '@sveltejs/kit';
import { hasUsers } from '#lib/server/auth.js';
import { listPieces } from '#lib/server/content.js';
import { getPieceUsageContexts, getShow, listShows } from '#lib/server/shows.js';

export function load({ locals }) {
	if (!hasUsers()) redirect(307, '/setup');
	if (!locals.user) redirect(307, '/login');

	const now = new Date().toISOString();
	const activeShows = listShows(['draft', 'ready', 'live']);
	const orderedShows = [...activeShows].sort((left, right) => {
		if (left.status === 'live' && right.status !== 'live') return -1;
		if (right.status === 'live' && left.status !== 'live') return 1;
		if (left.startsAtUtc && right.startsAtUtc) {
			const leftPast = left.startsAtUtc < now;
			const rightPast = right.startsAtUtc < now;
			if (leftPast !== rightPast) return leftPast ? 1 : -1;
			return leftPast
				? right.startsAtUtc.localeCompare(left.startsAtUtc)
				: left.startsAtUtc.localeCompare(right.startsAtUtc);
		}
		return left.startsAtUtc ? -1 : right.startsAtUtc ? 1 : 0;
	});
	const nextShowSummary = orderedShows[0] ?? null;
	const nextShow = nextShowSummary ? getShow(nextShowSummary.id) : null;
	const pieceCandidates = listPieces({ statuses: ['preparing', 'ready'] });
	const contexts = getPieceUsageContexts(pieceCandidates.map((piece) => piece.id));
	const currentPieces = pieceCandidates
		.filter((piece) => !(contexts[piece.id]?.sentHistory.length > 0) || piece.isFavorite)
		.slice(0, 6);

	return {
		nextShow,
		currentPieces,
		upcomingShows: orderedShows.filter((show) => show.id !== nextShowSummary?.id).slice(0, 4)
	};
}