import { json } from '@sveltejs/kit';
import {
    RebalanceError,
    previewRebalance,
    rebalanceReport,
    startRebalance,
    stopRebalance
} from '$lib/server/rebalancing/index.js';

export function GET() {
    return json(rebalanceReport());
}
export async function POST({ request }: { request: Request }) {
    try {
        const body = await request.json();
        if (!body || typeof body !== 'object' || Array.isArray(body))
            throw new RebalanceError('Provide a rebalance action.');
        if (body.action === 'preview') return json({ preview: previewRebalance(body.settings) });
        if (
            body.action === 'start' &&
            typeof body.previewId === 'string' &&
            body.previewId.length <= 100
        )
            return json({ run: startRebalance(body.previewId) });
        if (body.action === 'stop' && typeof body.id === 'string' && body.id.length <= 100)
            return json({ run: stopRebalance(body.id) });
        throw new RebalanceError('Choose a supported rebalance action.');
    } catch (error) {
        return json(
            { error: (error as Error).message },
            { status: error instanceof RebalanceError ? error.status : 400 }
        );
    }
}