/**
 * @file config
 * @description Configuration loader
 * @layer Shared
 */

import { readFileSync, existsSync } from "node:fs";
import { resolve } from "node:path";
import { ProxyConfigSchema, type ProxyConfig } from "./types/config.js";

export const defaultConfig: ProxyConfig = ProxyConfigSchema.parse({});

export function loadConfig(configPath?: string): ProxyConfig {
  const path = configPath ?? resolve(process.cwd(), "webproxy.config.json");

  if (!existsSync(path)) {
    return defaultConfig;
  }

  const raw = readFileSync(path, "utf-8");
  const json = JSON.parse(raw);
  return ProxyConfigSchema.parse(json);
}