"use server";
import { headers } from "next/headers";
import { UAParser } from "ua-parser-js";

export interface BackendResponse<T = unknown> {
  success: boolean;
  message: string;
  data?: T;
  error?: unknown;
}

export const backendFetch = async (path: string, options: RequestInit = {}) => {
  const userAgent = (await headers()).get("user-agent") || "";
  const userIp = (await headers()).get("x-forwarded-for") || "unknown";
  const ua = new UAParser(userAgent).getResult();
  const clientInfo = {
    os: ua.os.name ?? "unknown",
    osVersion: ua.os.version ?? "unknown",
    browser: ua.browser.name ?? "unknown",
    browserVersion: ua.browser.version ?? "unknown",
    deviceType: ua.device.type ?? "desktop",
    ip: userIp,
  };

  const res = await fetch(`${process.env.BACKEND_ENDPOINT}/${path}`, {
    ...options,
    headers: {
      "Content-Type": "application/json",
      "x-client-info": JSON.stringify(clientInfo),
      Authorization: `Bearer ${process.env.BACKEND_API_KEY}`,
      ...options.headers,
    },
    cache: "default",
  });

  const resJson = (await res.json()) as BackendResponse;

  if (!res.ok || !resJson.success) {
    throw new Error(`Elysia error: ${resJson.error}`);
  }

  return resJson;
};