import type { PageServerLoad, Actions } from './$types';
import { fail, redirect } from '@sveltejs/kit';
import {
	createApiClient,
	playlistCoverTrackIds,
	requireAccessTokenAction,
	unwrapOrError
} from '$lib/server/api';
import { uploadPresignedImage } from '$lib/server/upload';

const MAX_NAME = 100;

export const load: PageServerLoad = async ({ locals, fetch }) => {
	const api = createApiClient({ fetch, accessToken: locals.accessToken ?? undefined });
	const result = await api.GET('/playlists/users/{userId}', {
		params: { path: { userId: locals.user!.sub }, query: { pageNumber: 1, pageSize: 50 } }
	});

	const data = unwrapOrError(result, 'No se pudieron cargar tus playlists.');
	const trackIds = await playlistCoverTrackIds(
		api,
		data.items.map((p) => p.id)
	);

	return { playlists: data, trackIds };
};

export const actions: Actions = {
	create: async ({ request, locals, fetch }) => {
		const accessToken = requireAccessTokenAction(locals);
		if (typeof accessToken !== 'string') return accessToken;

		const form = await request.formData();
		const name = String(form.get('name') ?? '').trim();
		const description = String(form.get('description') ?? '').trim();
		const cover = form.get('cover');

		if (name === '' || name.length > MAX_NAME) {
			return fail(400, { message: 'El nombre es obligatorio (máx. 100 caracteres).', name, description });
		}

		const api = createApiClient({ fetch, accessToken });

		let pictureIntentId: string | null = null;
		if (cover instanceof File && cover.size > 0) {
			const result = await uploadPresignedImage(
				(args) => api.POST('/playlists/upload-picture', { body: args }),
				cover
			);
			if ('failMessage' in result) {
				return fail(502, { message: result.failMessage, name, description, detail: result.detail });
			}
			pictureIntentId = result.intentId;
		}

		const { data, error: err } = await api.POST('/playlists', {
			body: { name, description, pictureIntentId }
		});

		if (err || !data) return fail(502, { message: 'No se pudo crear la playlist.', name, description });

		redirect(303, `/playlists/${data.id}`);
	}
};