import Echo from 'laravel-echo';
import Pusher from 'pusher-js';

let echoClient: Echo<'reverb'> | null = null;

function environmentString(key: string): string | undefined {
    const value = import.meta.env[key];

    return typeof value === 'string' && value !== '' ? value : undefined;
}

export function getEcho(): Echo<'reverb'> {
    if (echoClient !== null) {
        return echoClient;
    }

    const scheme = environmentString('VITE_REVERB_SCHEME') ?? 'http';
    const forceTLS = scheme === 'https';

    echoClient = new Echo<'reverb'>({
        broadcaster: 'reverb',
        Pusher,
        key: environmentString('VITE_REVERB_APP_KEY') ?? 'local-key',
        wsHost:
            environmentString('VITE_REVERB_HOST') ?? window.location.hostname,
        wsPort: Number(environmentString('VITE_REVERB_PORT') ?? 8080),
        wssPort: Number(environmentString('VITE_REVERB_PORT') ?? 443),
        forceTLS,
        enabledTransports: ['ws', 'wss'],
    });

    return echoClient;
}