// ==UserScript==
// @name         自动刷课脚本
// @namespace    https://github.com/
// @version      1.0
// @description  自动播放视频、切换课程、处理弹窗，最高支持16倍速
// @author       User
// @match        *://*.chaoxing.com/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    const userSettings = {
        playbackRate: 16,
        autoAnswer: false
    };

    const config = {
        checkInterval: 2000,
        videoSelectors: [
            'video',
            'video.player',
            '.video-container video',
            '.play-video video',
            '#video',
            '.video-player video'
        ],
        nextButtonSelectors: [
            '.next-btn',
            '.next-video',
            '.next-lesson',
            'button.next',
            'a.next',
            '.next',
            '.continue',
            '.go-next',
            '[data-next]',
            'button:contains("下一节")',
            'button:contains("下一课")',
            'button:contains("下一章")',
            'button:contains("继续学习")',
            'a:contains("下一节")',
            'a:contains("下一课")',
            'a:contains("下一章")',
            'a:contains("继续学习")',
            '.btn-next',
            '#btn-next'
        ],
        popupSelectors: [
            '.modal',
            '.popup',
            '.dialog',
            '.alert',
            '.confirm',
            '.modal-dialog',
            '.popup-container'
        ],
        closeButtonSelectors: [
            '.close',
            '.btn-close',
            '.modal-close',
            '.popup-close',
            'button.close',
            '.confirm-btn',
            '.ok-btn',
            '.btn-confirm',
            '.btn-ok',
            'button:contains("确定")',
            'button:contains("确认")',
            'button:contains("关闭")',
            'button:contains("继续")',
            'button:contains("知道了")',
            'button:contains("我知道了")',
            'span.close',
            '.close-icon'
        ]
    };

    function waitForPageLoad() {
        return new Promise((resolve) => {
            if (document.readyState === 'complete') {
                resolve();
            } else {
                window.addEventListener('load', resolve);
            }
        });
    }

    function findElement(selectors) {
        for (const selector of selectors) {
            let element;
            try {
                if (selector.includes(':contains(')) {
                    const text = selector.match(/:contains\("(.*?)"\)/)[1];
                    const baseSelector = selector.replace(/:contains\(.*?\)/, '');
                    const elements = document.querySelectorAll(baseSelector || '*');
                    element = Array.from(elements).find(el => el.textContent.includes(text));
                } else {
                    element = document.querySelector(selector);
                }
            } catch (e) {
                element = document.querySelector(selector);
            }
            if (element) return element;
        }
        return null;
    }

    function handleVideo() {
        const video = findElement(config.videoSelectors);
        if (!video) return;

        if (video.playbackRate !== userSettings.playbackRate) {
            video.playbackRate = userSettings.playbackRate;
        }

        if (!video.muted) {
            video.muted = true;
        }

        if (video.paused && !video.ended) {
            video.play().catch(() => {});
        }

        if (video.ended) {
            handleNextLesson();
        }
    }

    function handleQuiz() {
        if (!userSettings.autoAnswer) return;
        const options = document.querySelectorAll('input[type="radio"], input[type="checkbox"], .answer-option, .quiz-option');
        options.forEach((option, index) => {
            if (index === 0) {
                option.click();
            }
        });
        const submitBtn = findElement(['.submit-btn', 'button:contains("提交")', 'button:contains("确定")', '.quiz-submit']);
        if (submitBtn) {
            submitBtn.click();
        }
    }

    function handleNextLesson() {
        const nextBtn = findElement(config.nextButtonSelectors);
        if (nextBtn) {
            nextBtn.click();
        }
    }

    function handlePopups() {
        const popups = document.querySelectorAll(config.popupSelectors.join(','));
        popups.forEach(popup => {
            if (getComputedStyle(popup).display !== 'none') {
                const closeBtn = findElement(config.closeButtonSelectors);
                if (closeBtn) {
                    closeBtn.click();
                }
            }
        });
    }

    function runLoop() {
        handleVideo();
        handlePopups();
        handleQuiz();
    }

    function showControlPanel() {
        const modalStyle = `
            position: fixed;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background: #ffffff;
            border-radius: 16px;
            box-shadow: 0 25px 80px rgba(0, 0, 0, 0.18);
            z-index: 99999;
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
            min-width: 340px;
            max-width: 420px;
            animation: fadeInScale 0.3s ease-out;
            overflow: hidden;
        `;

        const headerStyle = `
            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
            color: white;
            padding: 20px 24px;
            text-align: center;
        `;

        const titleStyle = `
            font-size: 18px;
            font-weight: 600;
            margin: 0;
        `;

        const bodyStyle = `
            padding: 24px;
        `;

        const sectionStyle = `
            margin-bottom: 20px;
        `;

        const labelStyle = `
            display: block;
            font-size: 14px;
            font-weight: 500;
            color: #333;
            margin-bottom: 10px;
        `;

        const selectStyle = `
            width: 100%;
            padding: 10px 14px;
            border: 1px solid #e0e0e0;
            border-radius: 8px;
            font-size: 14px;
            background: white;
            cursor: pointer;
            outline: none;
            transition: border-color 0.2s;
        `;

        const toggleContainerStyle = `
            display: flex;
            align-items: center;
            justify-content: space-between;
        `;

        const toggleStyle = `
            width: 48px;
            height: 26px;
            border-radius: 13px;
            background: #e0e0e0;
            cursor: pointer;
            position: relative;
            transition: background 0.2s;
        `;

        const toggleKnobStyle = `
            width: 22px;
            height: 22px;
            border-radius: 50%;
            background: white;
            position: absolute;
            top: 2px;
            left: 2px;
            transition: transform 0.2s;
            box-shadow: 0 2px 4px rgba(0,0,0,0.1);
        `;

        const buttonContainerStyle = `
            display: flex;
            gap: 10px;
            margin-top: 24px;
        `;

        const buttonStyle = `
            flex: 1;
            padding: 12px;
            border: none;
            border-radius: 8px;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: all 0.2s;
        `;

        const overlayStyle = `
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.5);
            z-index: 99998;
            animation: fadeIn 0.3s ease-out;
        `;

        const cssAnimation = `
            <style>
                @keyframes fadeInScale {
                    from {
                        opacity: 0;
                        transform: translate(-50%, -50%) scale(0.9);
                    }
                    to {
                        opacity: 1;
                        transform: translate(-50%, -50%) scale(1);
                    }
                }
                @keyframes fadeIn {
                    from { opacity: 0; }
                    to { opacity: 1; }
                }
                .control-panel-select:focus {
                    border-color: #667eea;
                }
                .control-panel-toggle.active {
                    background: #667eea;
                }
                .control-panel-toggle.active .control-panel-knob {
                    transform: translateX(22px);
                }
                .control-panel-btn-primary {
                    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
                    color: white;
                }
                .control-panel-btn-primary:hover {
                    transform: translateY(-1px);
                    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
                }
                .control-panel-btn-secondary {
                    background: #f5f5f5;
                    color: #666;
                }
                .control-panel-btn-secondary:hover {
                    background: #e8e8e8;
                }
            </style>
        `;

        const overlay = document.createElement('div');
        overlay.setAttribute('style', overlayStyle);

        const modal = document.createElement('div');
        modal.setAttribute('style', modalStyle);

        const header = document.createElement('div');
        header.setAttribute('style', headerStyle);

        const title = document.createElement('h2');
        title.setAttribute('style', titleStyle);
        title.textContent = '🚀 自动刷课控制面板';
        header.appendChild(title);

        const body = document.createElement('div');
        body.setAttribute('style', bodyStyle);

        const speedSection = document.createElement('div');
        speedSection.setAttribute('style', sectionStyle);

        const speedLabel = document.createElement('label');
        speedLabel.setAttribute('style', labelStyle);
        speedLabel.textContent = '播放倍速';
        speedSection.appendChild(speedLabel);

        const speedSelect = document.createElement('select');
        speedSelect.setAttribute('style', selectStyle);
        speedSelect.className = 'control-panel-select';
        const speeds = [0.5, 1, 1.25, 1.5, 2, 4, 8, 16];
        speeds.forEach(speed => {
            const option = document.createElement('option');
            option.value = speed;
            option.textContent = `${speed}x`;
            if (speed === userSettings.playbackRate) {
                option.selected = true;
            }
            speedSelect.appendChild(option);
        });
        speedSection.appendChild(speedSelect);
        body.appendChild(speedSection);

        const quizSection = document.createElement('div');
        quizSection.setAttribute('style', sectionStyle);

        const quizLabel = document.createElement('label');
        quizLabel.setAttribute('style', toggleContainerStyle);
        quizLabel.innerHTML = '<span style="font-size: 14px; font-weight: 500; color: #333;">自动答题</span>';

        const toggle = document.createElement('div');
        toggle.setAttribute('style', toggleStyle);
        toggle.className = `control-panel-toggle ${userSettings.autoAnswer ? 'active' : ''}`;

        const knob = document.createElement('div');
        knob.setAttribute('style', toggleKnobStyle);
        knob.className = 'control-panel-knob';
        toggle.appendChild(knob);

        toggle.addEventListener('click', () => {
            toggle.classList.toggle('active');
        });

        quizLabel.appendChild(toggle);
        quizSection.appendChild(quizLabel);
        body.appendChild(quizSection);

        const buttonContainer = document.createElement('div');
        buttonContainer.setAttribute('style', buttonContainerStyle);

        const saveBtn = document.createElement('button');
        saveBtn.setAttribute('style', buttonStyle);
        saveBtn.className = 'control-panel-btn-primary';
        saveBtn.textContent = '保存设置';

        const closeBtn = document.createElement('button');
        closeBtn.setAttribute('style', buttonStyle);
        closeBtn.className = 'control-panel-btn-secondary';
        closeBtn.textContent = '关闭';

        buttonContainer.appendChild(saveBtn);
        buttonContainer.appendChild(closeBtn);
        body.appendChild(buttonContainer);

        modal.appendChild(header);
        modal.appendChild(body);

        saveBtn.addEventListener('click', () => {
            userSettings.playbackRate = parseFloat(speedSelect.value);
            userSettings.autoAnswer = toggle.classList.contains('active');
            document.body.removeChild(overlay);
            document.body.removeChild(modal);
        });

        closeBtn.addEventListener('click', () => {
            document.body.removeChild(overlay);
            document.body.removeChild(modal);
        });

        document.head.insertAdjacentHTML('beforeend', cssAnimation);
        document.body.appendChild(overlay);
        document.body.appendChild(modal);
    }

    async function init() {
        await waitForPageLoad();
        showControlPanel();
        setInterval(runLoop, config.checkInterval);
        runLoop();
    }

    init();
})();