// ==UserScript==
// @name         枣庄专业技术人员公需课、专业课视频倍速播放
// @namespace    http://tampermonkey.net/
// @version      1.0
// @description  为枣庄专业技术人员公需课、专业课添加倍速播放功能
// @author       KVic
// @match        *://*.zyk.yxlearning.com/learning/*
// @grant        none
// @run-at       document-idle
// ==/UserScript==

(function() {
    'use strict';

    // 存储当前设置的倍速
    let currentSpeed = 1.5;

    // 等待播放器加载
    function waitForPlayer(callback, maxWait = 10000) {
        const startTime = Date.now();
        
        function check() {
            if (window.baiJiaYunPlayer && window.baiJiaYunPlayer.video) {
                callback(window.baiJiaYunPlayer);
                return true;
            }
            
            if (Date.now() - startTime > maxWait) {
                console.error('❌ 超时：未找到百家云播放器');
                return false;
            }
            
            setTimeout(check, 100);
        }
        
        check();
    }

    // 设置倍速的函数
    function setPlaybackSpeed(speed) {
        const player = window.baiJiaYunPlayer;
        
        if (!player || !player.video) {
            console.error('❌ 播放器未加载，请刷新页面后重试');
            return false;
        }
        
        const ffplayer = player.video;

        // 验证输入
        if (typeof speed !== 'number' || speed <= 0) {
            console.error('❌ 请输入有效的倍速值（大于0的数字）');
            return false;
        }

        // 保存当前倍速
        currentSpeed = speed;

        console.log(`=== 尝试设置为 ${speed}x 倍速 ===`);

        // 1. 检查当前状态
        console.log('ffplayer.playRate:', ffplayer.playRate);
        console.log('ffplayer.speed:', ffplayer.speed);
        console.log('player.speed:', player.speed);

        // 2. 调用底层方法
        try {
            console.log(`调用 ffplayer.setPlaybackRate(${speed})...`);
            if (typeof ffplayer.setPlaybackRate === 'function') {
                ffplayer.setPlaybackRate(speed);
            } else {
                console.warn('⚠️ setPlaybackRate 方法不存在，尝试直接设置属性');
            }
            
            console.log('调用后 ffplayer.playRate:', ffplayer.playRate);
            console.log('调用后 ffplayer.speed:', ffplayer.speed);
        } catch(e) {
            console.log('❌ 调用失败:', e);
            return false;
        }

        // 3. 同时设置所有相关属性（以防万一）
        ffplayer.playRate = speed;
        ffplayer.speed = speed;
        player.speed = speed;

        console.log(`\n=== 全部设置为 ${speed}x ===`);
        console.log('ffplayer.playRate:', ffplayer.playRate);
        console.log('player.speed:', player.speed);

        // 4. 等待 5 秒观察实际效果
        console.log('\n等待 5 秒观察视频是否加速...');
        const startTime = player.currentTime;
        const startTimestamp = Date.now();

        setTimeout(() => {
            const endTime = player.currentTime;
            const elapsed = (Date.now() - startTimestamp) / 1000;
            const progress = endTime - startTime;
            const actualSpeed = progress / elapsed;
            
            console.log('\n=== 最终测速结果 ===');
            console.log('时间增量:', progress.toFixed(1) + '秒');
            console.log('实际经过:', elapsed.toFixed(1) + '秒');
            console.log(`🎯 实际倍速: ${actualSpeed.toFixed(2)}x`);
            
            if (Math.abs(actualSpeed - speed) < 0.3) {
                console.log(`✅ 成功！视频已设置为 ${speed}x 倍速！`);
            } else {
                console.log('❌ 倍速可能未生效，可能需要刷新页面或重新加载视频才能生效');
            }
        }, 5000);

        return true;
    }

    // 应用保存的倍速
    function applySavedSpeed() {
        if (currentSpeed && currentSpeed !== 1.0) {
            console.log(`🔄 自动应用倍速: ${currentSpeed}x`);
            setTimeout(() => {
                setPlaybackSpeed(currentSpeed);
            }, 500);
        }
    }

    // 监听视频切换事件
    function setupVideoChangeListener() {
        // 监听 URL 变化
        let lastUrl = location.href;
        new MutationObserver(() => {
            const url = location.href;
            if (url !== lastUrl) {
                lastUrl = url;
                console.log('📍 检测到页面变化，等待新视频加载...');
                
                // 等待新播放器加载后应用倍速
                setTimeout(() => {
                    waitForPlayer((player) => {
                        console.log('✅ 新视频播放器已加载');
                        applySavedSpeed();
                    }, 5000);
                }, 1000);
            }
        }).observe(document, { subtree: true, childList: true });

        // 监听播放器重置事件
        if (window.baiJiaYunPlayer) {
            const originalPlay = window.baiJiaYunPlayer.play;
            if (originalPlay) {
                window.baiJiaYunPlayer.play = function(...args) {
                    const result = originalPlay.apply(this, args);
                    applySavedSpeed();
                    return result;
                };
            }
        }
    }

    // 创建UI界面
    function createSpeedControlUI() {
        const container = document.createElement('div');
        container.id = 'speed-control-container';
        container.style.cssText = `
            position: fixed;
            top: 20px;
            right: 20px;
            z-index: 999999;
            background: rgba(0, 0, 0, 0.8);
            padding: 15px;
            border-radius: 10px;
            color: white;
            font-family: Arial, sans-serif;
            min-width: 200px;
            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.3);
        `;

        const title = document.createElement('h3');
        title.textContent = '🎬 倍速控制';
        title.style.margin = '0 0 10px 0';
        title.style.fontSize = '16px';
        title.style.textAlign = 'center';

        const statusDiv = document.createElement('div');
        statusDiv.id = 'speed-status';
        statusDiv.style.cssText = `
            text-align: center;
            margin-bottom: 10px;
            font-size: 12px;
            color: #FFD700;
        `;
        statusDiv.textContent = `当前倍速: ${currentSpeed}x`;

        const buttonContainer = document.createElement('div');
        buttonContainer.style.display = 'flex';
        buttonContainer.style.flexWrap = 'wrap';
        buttonContainer.style.gap = '5px';
        buttonContainer.style.justifyContent = 'center';

        const speeds = [1.5, 2.0, 2.5, 3.0, 6.0, 8.0];
        speeds.forEach(speed => {
            const btn = document.createElement('button');
            btn.textContent = `${speed}x`;
            btn.style.cssText = `
                padding: 8px 12px;
                border: none;
                border-radius: 5px;
                background: ${speed === currentSpeed ? '#FF9800' : '#4CAF50'};
                color: white;
                cursor: pointer;
                font-size: 14px;
                transition: all 0.3s;
            `;
            
            btn.onmouseover = () => btn.style.background = '#45a049';
            btn.onmouseout = () => {
                btn.style.background = speed === currentSpeed ? '#FF9800' : '#4CAF50';
            };
            
            btn.onclick = () => {
                setPlaybackSpeed(speed);
                updateStatus(speed);
                
                // 更新按钮样式
                const allBtns = buttonContainer.querySelectorAll('button');
                allBtns.forEach(b => b.style.background = '#4CAF50');
                btn.style.background = '#FF9800';
            };
            
            buttonContainer.appendChild(btn);
        });

        const closeBtn = document.createElement('button');
        closeBtn.textContent = '✕';
        closeBtn.style.cssText = `
            position: absolute;
            top: 5px;
            right: 10px;
            background: none;
            border: none;
            color: white;
            font-size: 18px;
            cursor: pointer;
            padding: 0;
            width: 25px;
            height: 25px;
        `;
        closeBtn.onclick = () => container.remove();

        container.appendChild(closeBtn);
        container.appendChild(title);
        container.appendChild(statusDiv);
        container.appendChild(buttonContainer);

        document.body.appendChild(container);
        console.log('✅ 倍速控制面板已创建');
    }

    // 更新状态显示
    function updateStatus(speed) {
        const statusDiv = document.getElementById('speed-status');
        if (statusDiv) {
            statusDiv.textContent = `当前倍速: ${speed}x`;
        }
    }

    // 初始化
    waitForPlayer((player) => {
        console.log('✅ 百家云播放器已检测到');
        
        // 导出函数到全局
        window.setPlaybackSpeed = setPlaybackSpeed;
        
        // 创建UI控制面板
        createSpeedControlUI();
        
        // 设置视频切换监听
        setupVideoChangeListener();
        
        // 首次加载时应用默认倍速
        setTimeout(() => {
            setPlaybackSpeed(currentSpeed);
        }, 500);
        
        console.log('✅ 倍速播放功能已加载！');
        console.log('使用方法：');
        console.log('1. 使用页面上的控制面板');
        console.log('2. 或在控制台输入 setPlaybackSpeed(倍数)');
        console.log('   例如：setPlaybackSpeed(1.5) 设置为1.5倍速');
        console.log('💡 提示：切换视频时会自动应用上次设置的倍速');
    });

})();