import { useState, useCallback } from 'react';

/**
 * Reusable hook for copy-to-clipboard with visual feedback.
 *
 * Returns a `copied` boolean (true for `resetDelay` ms after a successful
 * copy) and a `copy` async function.
 *
 * @example
 * ```tsx
 * const { copied, copy } = useCopyToClipboard();
 *
 * <Button onClick={() => copy(someText)}>
 *   {copied ? <Check className="h-4 w-4 text-success" /> : <Copy className="h-4 w-4" />}
 *   {copied ? 'Copied!' : 'Copy'}
 * </Button>
 * ```
 */
export function useCopyToClipboard(resetDelay = 2000) {
  const [copied, setCopied] = useState(false);

  const copy = useCallback(
    async (text: string) => {
      if (!text || typeof text !== 'string') return false;
      try {
        if (navigator.clipboard?.writeText) {
          await navigator.clipboard.writeText(text);
          setCopied(true);
          setTimeout(() => setCopied(false), resetDelay);
          return true;
        }
      } catch {
        // clipboard API failed (e.g. non-secure context, permission)
      }
      // Fallback for http or when clipboard API is unavailable
      try {
        const textarea = document.createElement('textarea');
        textarea.value = text;
        textarea.setAttribute('readonly', '');
        textarea.style.position = 'fixed';
        textarea.style.left = '-9999px';
        textarea.style.top = '0';
        document.body.appendChild(textarea);
        textarea.select();
        const ok = document.execCommand('copy');
        document.body.removeChild(textarea);
        if (ok) {
          setCopied(true);
          setTimeout(() => setCopied(false), resetDelay);
          return true;
        }
      } catch {
        // ignore
      }
      return false;
    },
    [resetDelay],
  );

  return { copied, copy };
}