// Bitfocus Companion integration.
// Keeps the `currentRadio` custom variable on the Companion instance
// in sync with the currently playing station.
//
// Set COMPANION_URL in your .env to override the default host/port.
// e.g. COMPANION_URL=http://10.99.0.110:8000

const BASE = process.env.COMPANION_URL || 'http://10.99.0.110:8000';
const VARIABLE_PATH = '/api/custom-variable/currentRadio/value';

/**
 * Push a new value to Companion's `currentRadio` custom variable.
 * @param {number|null} stationId  Pass a numeric station id when playing;
 *                                  pass null/undefined to clear (stop/pause).
 */
export function notifyCompanion(stationId) {
    const value = stationId != null ? String(stationId) : '';
    const url = `${BASE}${VARIABLE_PATH}?value=${encodeURIComponent(value)}`;
    fetch(url, { method: 'POST' }).catch((err) => {
        console.warn('[companion] notify failed:', err.message);
    });
}