import { QueryClient } from "@tanstack/react-query";
import { useEffect, useRef } from "react";

import { apiRequest } from "@/client/lib/http";

export const queryClient = new QueryClient({
  defaultOptions: {
    queries: {
      // tessera is an IdP/admin surface, so server state should be fresh by
      // explicit invalidation and route entry, not ambient browser events.
      gcTime: 0,
      refetchOnReconnect: false,
      refetchOnWindowFocus: false,
      retry: false,
    },
  },
});

export const queryKeys = {
  accountApps: (userId: string | null) => ["account", userId, "apps"] as const,
  accountIdentities: (userId: string | null) => ["account", userId, "identities"] as const,
  accountSessions: (userId: string | null) => ["account", userId, "sessions"] as const,
  adminClients: (userId: string | null) => ["admin", userId, "clients"] as const,
  adminInvites: (userId: string | null) => ["admin", userId, "invites"] as const,
  adminLauncherApps: (userId: string | null) => ["admin", userId, "launcher-apps"] as const,
  adminUsers: (userId: string | null) => ["admin", userId, "users"] as const,
  consentClient: (userId: string | null, clientId: string | null) => ["consent-client", userId, clientId] as const,
  inviteLookup: (token: string | null) => ["invite", token] as const,
  launcherApps: () => ["launcher", "apps"] as const,
  preloginClient: (clientId: string | null, signedQuery: string | null) =>
    ["prelogin-client", clientId, signedQuery] as const,
};

export const fetchJson = async <T>(url: string): Promise<T> => {
  const res = await apiRequest(url);
  if (!res.ok) throw new Error(`HTTP ${res.status}`);
  return (await res.json()) as T;
};

export const useSessionQueryCacheBoundary = (userId: string | null, isPending: boolean): void => {
  const previousResolvedUserId = useRef<string | null | undefined>(undefined);

  useEffect(() => {
    if (isPending) return;

    if (previousResolvedUserId.current === undefined) {
      previousResolvedUserId.current = userId;
      return;
    }

    if (previousResolvedUserId.current !== userId) {
      queryClient.clear();
      previousResolvedUserId.current = userId;
    }
  }, [isPending, userId]);
};