import { ConfigService } from "@nestjs/config";
import { HttpModuleOptions } from "@nestjs/axios";
import { SocksProxyAgent } from "socks-proxy-agent";

/**
 * Shared HttpModule.registerAsync factory that applies the SOCKS proxy
 * when SOCKS_PROXY_HOST + SOCKS_PROXY_PORT env vars are set.
 * Used by every module that imports HttpModule.
 */
export function createHttpModuleOptions(
  configService: ConfigService,
): HttpModuleOptions | Promise<HttpModuleOptions> {
  const socksHost = configService.get<string>("SOCKS_PROXY_HOST");
  const socksPort = configService.get<string>("SOCKS_PROXY_PORT");

  if (socksHost && socksPort) {
    const proxyUrl = `socks5://${socksHost}:${socksPort}`;
    const agent = new SocksProxyAgent(proxyUrl);
    return {
      httpsAgent: agent,
      httpAgent: agent,
      proxy: false,
    };
  }
  return {};
}