import { json } from '@sveltejs/kit';
import { previewScaling, saveScaling, deleteScaling, scalingReport, setScalingGlobalPause, ScalingError } from '$lib/server/autoscaling/index.js';

export function GET() { return json(scalingReport()); }
export async function POST({ request }: { request: Request }) {
    try {
        const body = await request.json();
        if (!body || typeof body !== 'object' || Array.isArray(body)) throw new ScalingError('Provide a policy action.');
        if (body.id !== undefined && typeof body.id !== 'string') throw new ScalingError('Invalid policy identity.');
        if (body.action === 'preview') return json(previewScaling(body.settings, body.id, body.revision));
        if (body.action === 'save') return json({ policy: saveScaling(body.settings, body.id, body.revision, body.token) });
        if (body.action === 'delete') {
            if (typeof body.id !== 'string' || !body.id || !Number.isInteger(body.revision) || body.revision < 1) throw new ScalingError('Provide the policy identity and current revision.');
            deleteScaling(body.id, body.revision);
            return json({ ok: true });
        }
        if (body.action === 'global-pause' && typeof body.paused === 'boolean') { setScalingGlobalPause(body.paused); return json({ ok: true }); }
        throw new ScalingError('Choose a supported policy action.');
    } catch (error) { return json({ error: (error as Error).message }, { status: error instanceof ScalingError ? error.status : 400 }); }
}