import { allEntries, allLessons } from '$lib/language-learner/course';
import { COURSES, loadCourse } from '$lib/language-learner/courses';
import type { PageServerLoad } from './$types';

// Counted on the server so the overview doesn't download three full courses.
export const load: PageServerLoad = async () => {
	const courses = await Promise.all(COURSES.map((c) => loadCourse(c.code)));
	return {
		counts: Object.fromEntries(
			courses.map((c) => [
				c.code,
				{
					lessons: allLessons(c).length,
					words: allEntries(c).filter((e) => e.kind === 'word').length,
					levels: c.levels.map((lv) => lv.band)
				}
			])
		) as Record<string, { lessons: number; words: number; levels: string[] }>
	};
};