import { Injectable } from '@nestjs/common';
import { HttpService } from '../http.service';

export interface BgpRoute {
  asn?: string;
  prefix?: string;
  holder?: string;
  announced: boolean;
  source: string;
}

@Injectable()
export class BgpService {
  constructor(private readonly http: HttpService) {}

  async lookup(ip: string): Promise<BgpRoute | undefined> {
    const response = await this.http.json<{
      data?: { asns?: string[]; prefix?: string; holder?: string };
    }>(
      `https://stat.ripe.net/data/network-info/data.json?resource=${encodeURIComponent(ip)}`,
    );
    const data = response.data;
    if (!data?.prefix && !data?.asns?.length) return undefined;
    return {
      asn: data.asns?.[0],
      prefix: data.prefix,
      holder: data.holder,
      announced: Boolean(data.asns?.length),
      source: 'RIPEstat network-info',
    };
  }
}