// ==UserScript==
// @name         自動註冊 Udemy 免費課程
// @namespace    http://tampermonkey.net/
// @version      0.12.1
// @description  在特定網站自動執行
// @license      GPL-3.0
// @match        https://www.udemy.com/*
// @grant        none
// @author       twozwu
// @downloadURL none
// ==/UserScript==

(function () {
    'use strict';

    console.log("腳本自動執行中！");

    const observer = new MutationObserver(() => {
        const bodyText = document.body.innerText;
        if (bodyText.includes("立即註冊")) {
            console.log("✅ 偵測到免費");

            const btn = document.querySelector('[data-purpose="buy-this-course-button"]');
            const btn2 = document.querySelector('.ud-btn-large .ud-btn-label');

            if (btn && btn.innerText.includes("立即註冊") || btn2.innerText.includes("立即註冊")) {
                console.log("✅ 找到按鈕，可點擊");
                document.querySelectorAll('button').forEach(btn => btn.disabled = false);
                //setTimeout((() => btn.click()), 2500);
                if(btn) btn.click();
                if(btn2) btn2.click();
                observer.disconnect(); // 停止監聽
            }
        } else {
            let btn = document.querySelector('[data-purpose="buy-this-course-button"]');
            if (['立即購買', '前往課程'].includes(btn.innerText)) {
                window.close();
            }
        }
    });

    observer.observe(document.body, { childList: true, subtree: true });
})();