import * as dgram from 'dgram';
import { OSCArgument, OSCType, toBuffer, OSCArgumentType } from 'osc-min';
import { EventEmitter } from 'events';

/**
 * OSC Client base class, handles sending and receiving OSC messages

   ```
   const osc = new OSCClient("192.168.0.44", 8000)
   ```
 */
export class OSCClient extends EventEmitter {
  private socket: dgram.Socket;
  private host: string;
  private port: number;
  constructor(host: string, port: number) {
    super();
    this.host = host;
    this.port = port;
    this.socket = dgram.createSocket({ type: 'udp4', reuseAddr: true });
  }

  private sendPacket(packet: Buffer): void {
    this.socket.send(packet, 0, packet.length, this.port, this.host);
  }

  /**
     * Send an OSC message
       ```
       osc.send("/osc/url", OSCType.String, "hello")
       ```
     */

  public send<T extends OSCType>(address: string, type: T, value: OSCArgumentType<T>): void {
    const arg: OSCArgument<T> = {
      type,
      value,
    };

    const encoded = toBuffer(address, [arg]);
    this.sendPacket(encoded);
  }
}