"use server";

import { cookies } from "next/headers";
import {
  AUTH_COOKIE_NAME,
  BE_BASE_URL,
  REVALIDATE_SECONDS,
  getAdminResourceCacheTag,
} from "./constants";
import { buildFilterParam } from "@/app/api/dashboard/admin/utils";

export interface IFetchAdminResourceParams {
  resource: string;
  filters?: Record<string, unknown>;
  pagination?: { page: number; limit: number };
  sort?: { field: string; order: "asc" | "desc" };
}

export async function fetchAdminResource({
  resource,
  filters = {},
  pagination = { page: 1, limit: 100 },
  sort,
}: IFetchAdminResourceParams) {
  const cookieStore = await cookies();
  const token = cookieStore.get(AUTH_COOKIE_NAME)?.value;

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

  const queryParams = new URLSearchParams();
  queryParams.set("limit", String(pagination.limit ?? 100));
  queryParams.set("page", String(pagination.page ?? 1));

  if (sort?.field && sort?.order) {
    queryParams.set("sort", `${sort.field}:${sort.order}`);
  }

  const filterParam = buildFilterParam(
    filters as Record<string, string | { operator?: string; value: string }>
  );
  if (filterParam) {
    queryParams.set("filter", filterParam);
  }

  const backendUrl = `${BE_BASE_URL}/api/v1/${resource}${
    queryParams.size ? `?${queryParams.toString()}` : ""
  }`;

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

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

  return response.json();
}