/*
 * =============================================================================
 *  VibeQuant (vquant) — AI-Powered Financial Intelligence Platform
 * -----------------------------------------------------------------------------
 *  File:      client/src/lib/queryClient.ts
 *
 *  Author:    Simon-Pierre Boucher
 *  Contact:   contact@spboucher.ai
 *  Website:   https://www.spboucher.ai
 *  Demo:      https://www.vquant.ai
 *  License:   MIT (see LICENSE)
 *
 *  Copyright © 2026 Simon-Pierre Boucher. All rights reserved.
 * =============================================================================
 */

import { QueryClient, type QueryFunction } from "@tanstack/react-query";

async function throwIfResNotOk(res: Response) {
  if (!res.ok) {
    const text = (await res.text()) || res.statusText;
    throw new Error(`${res.status}: ${text}`);
  }
}

export async function apiRequest(
  method: string,
  url: string,
  data?: unknown,
): Promise<Response> {
  const res = await fetch(url, {
    method,
    headers: data ? { "Content-Type": "application/json" } : {},
    body: data ? JSON.stringify(data) : undefined,
    credentials: "include",
  });

  await throwIfResNotOk(res);
  return res;
}

type UnauthorizedBehavior = "returnNull" | "throw";

export const getQueryFn: <T>(options: {
  on401: UnauthorizedBehavior;
}) => QueryFunction<T> =
  ({ on401: unauthorizedBehavior }) =>
  async ({ queryKey }) => {
    const res = await fetch(queryKey.join("/") as string, {
      credentials: "include",
    });

    if (unauthorizedBehavior === "returnNull" && res.status === 401) {
      return null;
    }

    await throwIfResNotOk(res);
    return await res.json();
  };

export const queryClient = new QueryClient({
  defaultOptions: {
    queries: {
      queryFn: getQueryFn({ on401: "returnNull" }),
      refetchOnWindowFocus: false,
      staleTime: 5 * 60 * 1000,   // 5 minutes — reasonable for financial data
      gcTime: 30 * 60 * 1000,     // 30 minutes garbage collection
      retry: 1,                    // 1 retry on transient failures
    },
    mutations: {
      retry: false,
    },
  },
});