import { error, redirect } from '@sveltejs/kit';
import { ApiError } from '$lib/api/client';
import {
    getCollection,
    listCollectionMangas
} from '$lib/api/collections';
import { listCollectionPages } from '$lib/api/page_collections';
import type { PageLoad } from './$types';

export const ssr = false;

export const load: PageLoad = async ({ params, url }) => {
    let collection;
    try {
        // Awaited so the header renders immediately and 401/404 are handled by
        // the framework (redirect / not-found) rather than the happy path.
        collection = await getCollection(params.id);
    } catch (e) {
        if (e instanceof ApiError) {
            if (e.status === 401) {
                const next = encodeURIComponent(url.pathname);
                redirect(302, `/login?next=${next}`);
            }
            if (e.status === 404 || e.status === 403) {
                error(404, 'Collection not found');
            }
        }
        throw e;
    }
    return {
        collection,
        // Streamed so the manga/page grids show a skeleton while they load
        // instead of the whole page blocking on them.
        content: Promise.all([
            listCollectionMangas(params.id, { limit: 200 }),
            listCollectionPages(params.id, { limit: 200 })
        ]).then(([mangas, pages]) => ({ mangas: mangas.items, pages: pages.items }))
    };
};