import { preload } from "swr";
import { fetcher } from "@/lib/utils";

const CANVAS_CHAT_DATA_KEYS = [
  "/api/models?includeUnavailable=1",
  "/api/site-settings?scope=canvas-chat",
  "/api/canvas-skill-tags",
] as const;

async function nullableNoStoreFetcher(url: string) {
  const response = await fetch(url, { cache: "no-store" });
  if (!response.ok) return null;
  return response.json();
}

function preloadWithoutBlocking(
  key: string,
  dataFetcher: (url: string) => Promise<unknown>
) {
  void Promise.resolve(preload(key, dataFetcher)).catch(() => undefined);
}

export function preloadCanvasChatData(canvasId?: string | null) {
  CANVAS_CHAT_DATA_KEYS.forEach((key) => {
    preloadWithoutBlocking(key, fetcher);
  });

  preloadWithoutBlocking(
    "/api/user/membership-summary",
    nullableNoStoreFetcher
  );
  preloadWithoutBlocking("/api/user/image-stats", nullableNoStoreFetcher);

  const normalizedCanvasId = String(canvasId || "").trim();
  if (normalizedCanvasId) {
    const params = new URLSearchParams({
      chatId: normalizedCanvasId,
      scope: "canvas",
    });
    preloadWithoutBlocking(`/api/messages?${params.toString()}`, fetcher);
  }
}