// ==UserScript==
// @name         Instagram Iframe Reloader
// @namespace    http://tampermonkey.net/
// @version      1.1
// @description  Adds reload buttons to Instagram iframes
// @author       YourName
// @include      */threads/*
// @grant        none
// @run-at       document-idle
// ==/UserScript==

(function() {
  'use strict';

  function throttle(fn, delay) {
    let last = 0, timer;
    return function() {
      const now = Date.now(), args = arguments;
      if (now - last < delay) {
        clearTimeout(timer);
        timer = setTimeout(() => {
          last = now;
          fn.apply(this, args);
        }, delay);
      } else {
        last = now;
        fn.apply(this, args);
      }
    };
  }

  function processIframe(iframe) {
    if (iframe.dataset.reloadButtonAdded) return;
    iframe.dataset.reloadButtonAdded = '1';

    const container = iframe.parentNode;
    const containerStyle = getComputedStyle(container);

    // Position container if needed
    if (containerStyle.position === 'static') {
      container.style.position = 'relative';
    }

    // Create button
    const btn = document.createElement('button');
    btn.innerHTML = '↻';
    btn.title = 'Reload iframe';
    Object.assign(btn.style, {
      position: 'absolute',
      right: '-22px',
      top: '50%',
      transform: 'translateY(-50%)',
      width: '24px',
      height: '24px',
      borderRadius: '50%',
      background: '#3897f0',
      color: 'white',
      border: 'none',
      cursor: 'pointer',
      fontSize: '14px',
      zIndex: '10000',
      boxShadow: '0 1px 2px rgba(0,0,0,0.2)',
      display: 'flex',
      alignItems: 'center',
      justifyContent: 'center',
      opacity: '0.85',
      transition: 'all 0.2s',
      padding: '0'
    });

    // Hover effects
    btn.addEventListener('mouseover', () => {
      btn.style.opacity = '1';
      btn.style.transform = 'translateY(-50%) scale(1.05)';
    });

    btn.addEventListener('mouseout', () => {
      btn.style.opacity = '0.85';
      btn.style.transform = 'translateY(-50%)';
    });

    // Click handler
    btn.addEventListener('click', (e) => {
      e.stopPropagation();
      const src = iframe.src;
      iframe.src = '';
      setTimeout(() => { iframe.src = src; }, 10);
    });

    container.appendChild(btn);
  }

  function scanIframes() {
    document.querySelectorAll('iframe[data-s9e-mediaembed="instagram"]:not([data-reload-button-added])').forEach(processIframe);
  }

  // Initialize with throttling
  const throttledScan = throttle(scanIframes, 200);
  const observer = new MutationObserver(throttledScan);
  observer.observe(document.body, { childList: true, subtree: true });
  scanIframes();
})();