import type { PersonaProtocol } from '../types';
import { PersonaRESTProtocol, PersonaWebRTCProtocol, PersonaWebSocketProtocol } from '../protocol';

/**
 * Converts a File object to a base64 string
 */
export function fileToBase64(file: File): Promise<string> {
  return new Promise((resolve, reject) => {
    const reader = new FileReader();
    reader.readAsDataURL(file);

    reader.onload = () => {
      const base64 = reader.result as string;
      const base64WithoutPrefix = base64.split(';base64,')[1];
      resolve(base64WithoutPrefix);
    };

    reader.onerror = (error) => {
      reject(error);
    };
  });
}

/**
 * Extracts the first available protocol endpoint URL
 */
export function getFirstAvailableProtocolEndpoint(protocols: PersonaProtocol[]): string | null {
  const extractors: { [key: string]: (protocol: PersonaProtocol) => string } = {
    rest: (protocol) => (protocol as PersonaRESTProtocol).config.apiUrl,
    webrtc: (protocol) =>
      (protocol as PersonaWebRTCProtocol).config.webrtcUrl.replace('/webrtc', '').replace('ws://', 'http://').replace('wss://', 'https://'),
    websocket: (protocol) =>
      (protocol as PersonaWebSocketProtocol).config.webSocketUrl
        .replace('/websocket', '')
        .replace('ws://', 'http://')
        .replace('wss://', 'https://'),
  };

  for (const protocol of protocols) {
    const extractor = extractors[protocol.getName()];
    if (extractor) {
      return extractor(protocol);
    }
  }
  return null;
}