// ==UserScript==
// @name         YouTube Video Downloader
// @namespace    https://violentmonkey.github.io/
// @version      1.2
// @description  Adds a download button to YouTube videos.
// @author       CaioX
// @match        https://www.youtube.com/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    // Function to create and insert the download button
    function addDownloadButton() {
        // Check if the button already exists
        if (document.getElementById('downloadButton')) return;

        // Create the button
        var button = document.createElement('button');
        button.id = 'downloadButton';
        button.innerText = 'Download';
        button.style.padding = '10px';
        button.style.backgroundColor = '#ff0000';
        button.style.color = '#ffffff';
        button.style.border = 'none';
        button.style.borderRadius = '2px';
        button.style.cursor = 'pointer';
        button.style.marginLeft = '8px';

        // Find the "Become a member" button or toolbar area
        var memberButton = document.querySelector('ytd-button-renderer.ytd-menu-renderer');
        var toolbar = document.querySelector('#top-level-buttons-computed');

        if (memberButton) {
            memberButton.parentNode.replaceChild(button, memberButton);
        } else if (toolbar) {
            toolbar.appendChild(button);
        } else {
            console.log('Toolbar or member button not found.');
            return;
        }

        // Add click event to the button
        button.addEventListener('click', function() {
            var videoUrl = window.location.href;
            var videoId = new URLSearchParams(new URL(videoUrl).search).get('v');
            if (videoId) {
                var downloadUrl = `https://www.y2mate.com/youtube/${videoId}`;
                window.open(downloadUrl, '_blank');
            } else {
                alert('Video ID not found.');
            }
        });
    }

    // Function to observe changes in the page content
    function observePageChanges() {
        var targetNode = document.body;
        var observerConfig = { childList: true, subtree: true };

        var observer = new MutationObserver(function(mutations) {
            mutations.forEach(function(mutation) {
                if (mutation.addedNodes.length) {
                    setTimeout(addDownloadButton, 1000); // Add a delay to ensure YouTube's dynamic content is fully loaded
                }
            });
        });

        observer.observe(targetNode, observerConfig);
    }

    // Initial call to add the download button
    setTimeout(addDownloadButton, 2000); // Add an initial delay to ensure YouTube is fully loaded
    observePageChanges();
})();