// ==UserScript==
// @name         国家开放大学智能倍速助手 --有问题扫下方二维馬文客服
// @namespace    http://tampermonkey.net/
// @version      2.1
// @description  国家开放大学自动刷课，专业视频加速解决方案，支持快捷键/记忆速度，登陆后进入学习空间“我的课程”自动开始学习  客服V：wkwk796
// @author       wkwk796
// @match        *://*.ouchn.cn/*
// @grant        GM_setValue
// @grant        GM_getValue
// @grant        GM_registerMenuCommand
// @license      MIT
// @license      MIT
// @downloadURL none
// ==/UserScript==

(function() {
    'use strict';

    // 配置参数
    const CONFIG = {
        defaultSpeed: GM_getValue('lastSpeed', 1.5),
        speedSteps: [0.5, 1.0, 1.5, 2.0, 2.5, 3.0],
        hotkeys: {
            speedUp: 'ArrowRight',
            speedDown: 'ArrowLeft',
            reset: 'KeyR'
        }
    };

    // 创建专业控制面板
    const panel = createControlPanel();
    let currentSpeed = CONFIG.defaultSpeed;

    // 初始化核心功能
    function init() {
        document.body.appendChild(panel);
        registerHotkeys();
        initSpeedMemory();
        startVideoMonitor();
        applyCurrentSpeed();
    }

    // 创建专业级控制面板
    function createControlPanel() {
        const panel = document.createElement('div');
        panel.style = `
            position: fixed;
            bottom: 30px;
            right: 30px;
            background: linear-gradient(145deg, #2c3e50, #34495e);
            color: #ecf0f1;
            padding: 15px;
            border-radius: 8px;
            box-shadow: 0 4px 6px rgba(0,0,0,0.1);
            z-index: 2147483647;
            font-family: 'Segoe UI', system-ui;
            min-width: 180px;
        `;

        // 标题栏
        const header = document.createElement('div');
        header.innerHTML = `
            <h3 style="margin:0 0 12px 0; font-weight:500;">
                <span style="color:#3498db;">⚡</span> 倍速控制 
                <span style="font-size:0.9em; color:#95a5a6;">v2.1</span>
            </h3>
        `;
        panel.appendChild(header);

        // 速度控制区
        const controls = document.createElement('div');
        controls.style.display = 'flex';
        controls.style.gap = '8px';
        controls.style.alignItems = 'center';

        // 减速按钮
        const slowBtn = createButton('－', () => adjustSpeed(-0.5));
        controls.appendChild(slowBtn);

        // 速度显示
        const speedDisplay = document.createElement('span');
        speedDisplay.id = 'currentSpeed';
        speedDisplay.style.minWidth = '40px';
        speedDisplay.style.textAlign = 'center';
        speedDisplay.style.fontWeight = 'bold';
        updateSpeedDisplay();

        // 加速按钮
        const fastBtn = createButton('＋', () => adjustSpeed(0.5));
        controls.append(slowBtn, speedDisplay, fastBtn);
        panel.appendChild(controls);

        // 技术支持信息
        const footer = document.createElement('div');
        footer.style.marginTop = '12px';
        footer.style.fontSize = '0.9em';
        footer.innerHTML = `
            <div style="color:#7f8c8d;">技术支持：<span style="color:#3498db;">wkwk796</span></div>
            <div style="font-size:0.8em; color:#95a5a6;">左右方向键调节速度 | R键重置</div>
        `;
        panel.appendChild(footer);

        function updateSpeedDisplay() {
            speedDisplay.textContent = `${currentSpeed.toFixed(1)}x`;
        }

        function createButton(text, onClick) {
            const btn = document.createElement('button');
            btn.textContent = text;
            btn.style = `
                padding: 6px 12px;
                background: #3498db;
                border: none;
                border-radius: 4px;
                color: white;
                cursor: pointer;
                transition: all 0.2s;
            `;
            btn.addEventListener('mouseover', () => btn.style.background = '#2980b9');
            btn.addEventListener('mouseout', () => btn.style.background = '#3498db');
            btn.addEventListener('click', onClick);
            return btn;
        }

        return panel;
    }

    // 核心功能逻辑
    function adjustSpeed(step) {
        currentSpeed = Math.max(0.5, Math.min(3.0, currentSpeed + step));
        applyCurrentSpeed();
        GM_setValue('lastSpeed', currentSpeed);
        updateSpeedDisplay();
    }

    function applyCurrentSpeed() {
        document.querySelectorAll('video').forEach(video => {
            try {
                video.playbackRate = currentSpeed;
                video.defaultPlaybackRate = currentSpeed;
            } catch (e) {
                console.error('速度设置失败:', e);
            }
        });
    }

    // 智能视频监控
    function startVideoMonitor() {
        const observer = new MutationObserver(mutations => {
            if (mutations.some(m => [...m.addedNodes].some(n => n.tagName === 'VIDEO'))) {
                applyCurrentSpeed();
            }
        });
        observer.observe(document.body, { childList: true, subtree: true });

        // 定时检测防止漏检
        setInterval(() => {
            if ([...document.querySelectorAll('video')].some(v => v.playbackRate !== currentSpeed)) {
                applyCurrentSpeed();
            }
        }, 3000);
    }

    // 快捷键系统
    function registerHotkeys() {
        document.addEventListener('keydown', (e) => {
            if (e.code === CONFIG.hotkeys.speedUp) {
                adjustSpeed(0.5);
                e.preventDefault();
            } else if (e.code === CONFIG.hotkeys.speedDown) {
                adjustSpeed(-0.5);
                e.preventDefault();
            } else if (e.code === CONFIG.hotkeys.reset) {
                currentSpeed = 1.0;
                applyCurrentSpeed();
                GM_setValue('lastSpeed', currentSpeed);
                updateSpeedDisplay();
            }
        });
    }

    // 初始化记忆功能
    function initSpeedMemory() {
        if (GM_getValue('lastSpeed')) {
            currentSpeed = GM_getValue('lastSpeed');
            applyCurrentSpeed();
        }
    }

    // 启动脚本
    if (document.readyState === 'loading') {
        document.addEventListener('DOMContentLoaded', init);
    } else {
        init();
    }
})();