import { useCallback, useEffect, useState } from 'react';

import { useSuperagentConversationRuntime } from './runtimeContext';

// Copy text to the clipboard via the host-injected `copyToClipboard` adapter,
// with a transient `copied` flag for confirmation UI. Components read this hook
// directly instead of drilling the handler as a prop. `canCopy` is false when the
// host hasn't wired clipboard, so callers can hide the affordance entirely.
export function useClipboard(resetDelayMs = 1500) {
  const { copyToClipboard } = useSuperagentConversationRuntime();
  const [copied, setCopied] = useState(false);

  useEffect(() => {
    if (!copied) return;
    const timer = setTimeout(() => setCopied(false), resetDelayMs);
    return () => clearTimeout(timer);
  }, [copied, resetDelayMs]);

  const copy = useCallback(async (text: string) => {
    const trimmed = text?.trim();
    if (!trimmed || !copyToClipboard) return false;
    try {
      await copyToClipboard(trimmed);
      setCopied(true); // confirm only once the clipboard write actually succeeds
      return true;
    } catch {
      return false; // leave the icon unchanged so a failed copy doesn't claim success
    }
  }, [copyToClipboard]);

  return { canCopy: Boolean(copyToClipboard), copied, copy };
}