import { LogLevel, WebClient, WebClientOptions } from '@slack/web-api';

const isProduction = process.env.NODE_ENV === 'production';
const logLevel: LogLevel = isProduction ? LogLevel.DEBUG : LogLevel.INFO;

/**
 * Generate WebClilent instance
 * @param token
 * @param serverUri Slack Bot Token or Proxy Server URI
 * @param headers
 */
export function generateWebClient(token?: string, serverUri?: string, headers?:{[key:string]:string}): WebClient;

/**
 * Generate WebClilent instance
 * @param token
 * @param opts
 */
export function generateWebClient(token?: string, opts?: WebClientOptions): WebClient;

export function generateWebClient(token?: string, ...args: any[]): WebClient {
  if (typeof args[0] === 'string') {
    return new WebClient(token, { logLevel, slackApiUrl: args[0], headers: args[1] });
  }

  return new WebClient(token, { logLevel, ...args });
}