// ==UserScript==
// @name         泰安专技培训视频倍速控制
// @namespace    http://tampermonkey.net/
// @version      1.0
// @description  为sdta-gxk和sdta-zyk网站的视频添加倍速控制按钮
// @author       您的用户名
// @match        https://sdta-gxk.yxlearning.com/*
// @match        https://sdta-zyk.yxlearning.com/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    // 倍速选项配置
    const speedOptions = [0.5, 0.75, 1, 1.25, 1.5, 2, 4, 8, 16];
    let currentSpeed = 1;
    let speedButton = null;
    let video = null;

    // 创建倍速控制按钮
    function createSpeedButton() {
        if (speedButton) return speedButton;

        const button = document.createElement('button');
        button.textContent = '1x';
        button.style.cssText = `
            position: absolute;
            top: 10px;
            right: 10px;
            background: rgba(136, 181, 174, 0.8);
            color: white;
            border: none;
            border-radius: 4px;
            padding: 4px 8px;
            font-size: 14px;
            cursor: pointer;
            z-index: 10000;
            outline: none;
        `;

        button.addEventListener('click', () => {
            const nextIndex = (speedOptions.indexOf(currentSpeed) + 1) % speedOptions.length;
            currentSpeed = speedOptions[nextIndex];
            updateSpeed(currentSpeed);
        });

        return button;
    }

    // 更新视频播放速度
    function updateSpeed(speed) {
        if (video && !isNaN(speed)) {
            video.playbackRate = speed;
            speedButton.textContent = `${speed}x`;
        }
    }

    // 主函数：查找视频元素并添加按钮
    function main() {
        video = document.querySelector('video');
        if (!video) {
            console.log('未找到视频元素，等待重试...');
            setTimeout(main, 1000);
            return;
        }

        speedButton = createSpeedButton();
        video.parentNode.appendChild(speedButton);

        // 监听视频变化
        new MutationObserver(() => {
            const newVideo = document.querySelector('video');
            if (newVideo && newVideo !== video) {
                video = newVideo;
                video.parentNode.appendChild(speedButton);
            }
        }).observe(document.body, { childList: true, subtree: true });
    }

    // 等待页面加载完成
    window.addEventListener('load', main);
})();