import { jsonBody } from '$lib/server/request-body.js';
import { isHttpError, json } from '@sveltejs/kit';
import { previewCreation } from '$lib/server/provisioning/index.js';

export async function POST({ request }: { request: Request }) {
    try {
        const body = await jsonBody(request);
        if (!body || typeof body !== 'object' || Array.isArray(body))
            throw new Error('Provide a launch selection.');
        if (body.blueprintId !== undefined)
            throw new Error(
                'Collections use target counts. Use /api/deployment-collections/preview to preview only missing servers.'
            );
        return json(previewCreation(body));
    } catch (err) {
        if (isHttpError(err, 413)) throw err;
        return json({ error: (err as Error).message }, { status: 400 });
    }
}