import type { ParsedNode } from './ss.js';

export function parseVless(uri: string): ParsedNode {
  const url = new URL(uri);
  const name = decodeURIComponent(url.hash.slice(1)) || 'VLESS';
  const server = url.hostname;
  const port = parseInt(url.port, 10);
  const uuid = url.username;
  const params = url.searchParams;

  const security = params.get('security') || 'none';
  const type = params.get('type') || 'tcp';
  const sni = params.get('sni') || '';
  const flow = params.get('flow') || '';

  let line = `${name} = vless, ${server}, ${port}, username=${uuid}`;

  if (security === 'reality') {
    const pbk = params.get('pbk') || '';
    const sid = params.get('sid') || '';
    line += ', tls=true';
    if (sni) line += `, sni=${sni}`;
    if (pbk) line += `, reality-public-key=${pbk}`;
    if (sid) line += `, reality-short-id=${sid}`;
    line += ', skip-cert-verify=false';
  } else if (security === 'tls') {
    line += ', tls=true';
    if (sni) line += `, sni=${sni}`;
    line += ', skip-cert-verify=false';
  }

  if (type === 'ws') {
    const path = params.get('path') || '/';
    const host = params.get('host') || sni || server;
    line += ', ws=true';
    line += `, ws-path=${path}`;
    line += `, ws-headers=Host:${host}`;
  } else if (type === 'grpc') {
    const serviceName = params.get('serviceName') || '';
    if (serviceName) line += `, grpc-service-name=${serviceName}`;
  }

  if (flow === 'xtls-rprx-vision') {
    line += ', flow=xtls-rprx-vision';
  }

  return { name, type: 'vless', server, port, surgeLine: line };
}