import { db } from '$lib/server/db';
import type { LayoutServerLoad } from './$types';

export const load: LayoutServerLoad = ({ locals }) => {
	// the overview: every user's tracks, thinned for the persistent map
	const rows = db
		.prepare(
			`SELECT a.id, a.name, a.type, a.date, a.distance_m, a.points, u.username
			 FROM activities a JOIN users u ON u.id = a.user_id`
		)
		.all() as {
		id: number;
		name: string;
		type: string;
		date: string | null;
		distance_m: number;
		points: string;
		username: string;
	}[];
	const tracks = rows.map((row) => {
		const points = JSON.parse(row.points) as { lat: number; lon: number }[];
		const step = Math.max(1, Math.floor(points.length / 300));
		const latlngs = points
			.filter((_, i) => i % step === 0 || i === points.length - 1)
			.map((p) => [p.lat, p.lon] as [number, number]);
		return {
			id: row.id,
			name: row.name,
			username: row.username,
			type: row.type,
			date: row.date,
			distance_m: row.distance_m,
			latlngs
		};
	});

	return { user: locals.user, tracks };
};