import { cookies } from "next/headers";

import { IUser } from "@/app/features/Pages/Admin/Users/interfaces";
import {
  AUTH_COOKIE_NAME,
  BE_BASE_URL,
  REVALIDATE_SECONDS,
  USERS_CACHE_TAG,
} from "./constants";

export async function fetchUsers(): Promise<IUser[]> {
  const cookieStore = await cookies();
  const token = cookieStore.get(AUTH_COOKIE_NAME)?.value;

  if (!token) {
    throw new Error("Missing auth token");
  }

  const backendUrl = `${BE_BASE_URL}/api/v1/users`;

  const response = await fetch(backendUrl, {
    method: "GET",
    headers: {
      "Content-Type": "application/json",
      Authorization: `Bearer ${token}`,
    },
    next: {
      revalidate: REVALIDATE_SECONDS,
      tags: [USERS_CACHE_TAG],
    },
  });

  if (!response.ok) {
    const errorData = await response
      .json()
      .catch(() => ({ message: "Failed to fetch users" }));
    throw new Error(errorData?.message || "Failed to fetch users");
  }

  const data = await response.json();

  const users = Array.isArray(data) ? data : data.users || data.data || [];

  return users;
}