// ==UserScript==
// @name         创新创新-贤程教育
// @namespace    https://www.example.com/
// @version      10.0
// @description  修复题库合并问题，添加导出功能，优化面板位置记忆
// @author       xixi
// @match        *://*.gdcxxy.net/*
// @grant        GM_setValue
// @grant        GM_getValue
// ==/UserScript==

(function() {
    'use strict';

    // 题库系统
    let questionBank = {};
    let currentCourse = 'CB030116'; // 固定课程编码
    let logs = [];

    /**
     * 初始化题库
     */
    function initQuestionBank() {
        const savedBank = GM_getValue('localQuestionBank');
        if (savedBank) {
            questionBank = savedBank;
            addLog(`已加载题库，总计 ${countQuestions()} 题`, 'success');
            updateStats();
        } else {
            addLog('未找到题库，请导入JSON文件', 'warning');
        }
    }

    /**
     * 统计题目数量
     */
    function countQuestions() {
        let count = 0;
        for (const course in questionBank) {
            for (const chapter in questionBank[course].chapters) {
                count += questionBank[course].chapters[chapter].length;
            }
        }
        return count;
    }

    /**
     * 更新统计信息
     */
    function updateStats() {
        const totalQuestions = countQuestions();
        let coursesCount = 0;
        let singleChoice = 0;
        let judgment = 0;
        let shortAnswer = 0;
        
        for (const course in questionBank) {
            coursesCount++;
            for (const chapter in questionBank[course].chapters) {
                questionBank[course].chapters[chapter].forEach(q => {
                    if (q.type === '单选') singleChoice++;
                    if (q.type === '判断') judgment++;
                    if (q.type === '简答') shortAnswer++;
                });
            }
        }
        
        const statsDisplay = document.getElementById('statsDisplay');
        if (statsDisplay) {
            statsDisplay.innerHTML = `
                <div style="margin-bottom: 8px;"><strong>📊 题库统计</strong></div>
                <div>📚 总题目: ${totalQuestions} 题</div>
                <div>🔘 单选题: ${singleChoice} 题</div>
                <div>✅ 判断题: ${judgment} 题</div>
                <div>📝 简答题: ${shortAnswer} 题</div>
                <div>🎯 课程: ${coursesCount} 门</div>
                <div style="margin-top: 8px; font-size: 11px; color: #666;">
                    上次更新: ${new Date().toLocaleString()}
                </div>
            `;
        }
    }

    /**
     * 加载JSON题库文件（合并而不是覆盖）
     */
    function loadQuestionBankFromFile(file) {
        return new Promise((resolve, reject) => {
            const reader = new FileReader();
            
            reader.onload = function(e) {
                try {
                    const newBank = JSON.parse(e.target.result);
                    
                    // 验证数据结构
                    if (isValidQuestionBank(newBank)) {
                        // 合并题库而不是覆盖
                        mergeQuestionBanks(newBank);
                        GM_setValue('localQuestionBank', questionBank);
                        
                        updateStats();
                        const addedCount = countQuestionsInBank(newBank);
                        addLog(`题库合并成功: 新增 ${addedCount} 题，总计 ${countQuestions()} 题`, 'success');
                        resolve(questionBank);
                    } else {
                        addLog('题库文件格式不正确', 'error');
                        reject(new Error('无效的题库格式'));
                    }
                } catch (error) {
                    addLog('解析题库文件失败: ' + error.message, 'error');
                    reject(error);
                }
            };
            
            reader.onerror = function() {
                addLog('读取文件失败', 'error');
                reject(new Error('文件读取失败'));
            };
            
            reader.readAsText(file);
        });
    }

    /**
     * 计算题库中的题目数量
     */
    function countQuestionsInBank(bank) {
        let count = 0;
        for (const course in bank) {
            for (const chapter in bank[course].chapters) {
                count += bank[course].chapters[chapter].length;
            }
        }
        return count;
    }

    /**
     * 合并两个题库
     */
    function mergeQuestionBanks(newBank) {
        const startCount = countQuestions();
        
        for (const course in newBank) {
            if (!questionBank[course]) {
                // 新课程，直接添加
                questionBank[course] = newBank[course];
                continue;
            }
            
            // 现有课程，合并章节
            for (const chapter in newBank[course].chapters) {
                if (!questionBank[course].chapters[chapter]) {
                    // 新章节，直接添加
                    questionBank[course].chapters[chapter] = newBank[course].chapters[chapter];
                    continue;
                }
                
                // 现有章节，合并题目（去重）
                const existingQuestions = questionBank[course].chapters[chapter];
                const newQuestions = newBank[course].chapters[chapter];
                
                // 创建现有题目的哈希表用于快速查找
                const existingQuestionMap = new Map();
                existingQuestions.forEach(q => {
                    const key = generateQuestionKey(q);
                    existingQuestionMap.set(key, q);
                });
                
                // 添加新题目（如果不存在）
                newQuestions.forEach(newQ => {
                    const key = generateQuestionKey(newQ);
                    if (!existingQuestionMap.has(key)) {
                        existingQuestions.push(newQ);
                        existingQuestionMap.set(key, newQ);
                    }
                });
            }
        }
        
        const endCount = countQuestions();
        return endCount - startCount;
    }

    /**
     * 生成题目唯一标识键
     */
    function generateQuestionKey(question) {
        // 使用清理后的题目文本作为键
        const cleanText = cleanQuestionText(question.question);
        return `${question.type}_${cleanText.substring(0, 100)}`;
    }

    /**
     * 验证题库数据结构
     */
    function isValidQuestionBank(data) {
        if (typeof data !== 'object' || data === null) return false;
        
        for (const course in data) {
            const courseData = data[course];
            if (!courseData.course_name || !courseData.chapters) return false;
            
            if (typeof courseData.chapters !== 'object') return false;
            
            for (const chapter in courseData.chapters) {
                if (!Array.isArray(courseData.chapters[chapter])) return false;
                
                for (const question of courseData.chapters[chapter]) {
                    if (!question.question || !question.type || question.answer === undefined) {
                        console.warn('无效的题目:', question);
                        return false;
                    }
                }
            }
        }
        
        return true;
    }

    /**
     * 导出题库为JSON文件
     */
    function exportQuestionBank() {
        if (Object.keys(questionBank).length === 0) {
            addLog('题库为空，无法导出', 'warning');
            return;
        }
        
        try {
            const dataStr = JSON.stringify(questionBank, null, 2);
            const dataBlob = new Blob([dataStr], {type: 'application/json'});
            
            const downloadLink = document.createElement('a');
            downloadLink.download = `题库备份_${new Date().toISOString().split('T')[0]}.json`;
            downloadLink.href = URL.createObjectURL(dataBlob);
            downloadLink.click();
            
            addLog(`题库导出成功，共 ${countQuestions()} 题`, 'success');
        } catch (error) {
            addLog(`导出失败: ${error.message}`, 'error');
        }
    }

    /**
     * 清理题库（删除重复题目）
     */
    function cleanQuestionBank() {
        const startCount = countQuestions();
        
        for (const course in questionBank) {
            for (const chapter in questionBank[course].chapters) {
                const questions = questionBank[course].chapters[chapter];
                const uniqueQuestions = [];
                const seenQuestions = new Set();
                
                questions.forEach(q => {
                    const key = generateQuestionKey(q);
                    if (!seenQuestions.has(key)) {
                        seenQuestions.add(key);
                        uniqueQuestions.push(q);
                    }
                });
                
                questionBank[course].chapters[chapter] = uniqueQuestions;
            }
        }
        
        GM_setValue('localQuestionBank', questionBank);
        const endCount = countQuestions();
        const removedCount = startCount - endCount;
        
        if (removedCount > 0) {
            addLog(`已清理 ${removedCount} 个重复题目，剩余 ${endCount} 题`, 'success');
        } else {
            addLog('未发现重复题目', 'info');
        }
        
        updateStats();
    }

    /**
     * 智能搜索答案
     */
    function findAnswer(questionText) {
        // 清理题目文本
        const cleanQuestion = cleanQuestionText(questionText);
        
        // 优先在当前课程中搜索
        if (questionBank[currentCourse]) {
            const answer = searchInCourse(cleanQuestion, currentCourse);
            if (answer) return answer;
        }
        
        // 如果没有，在所有课程中搜索
        for (const course in questionBank) {
            if (course === currentCourse) continue;
            const answer = searchInCourse(cleanQuestion, course);
            if (answer) return answer;
        }
        
        return null;
    }

    /**
     * 在指定课程中搜索
     */
    function searchInCourse(questionText, course) {
        for (const chapter in questionBank[course].chapters) {
            for (const questionData of questionBank[course].chapters[chapter]) {
                const cleanBankQuestion = cleanQuestionText(questionData.question);
                
                // 使用多种匹配策略
                if (isQuestionMatch(questionText, cleanBankQuestion)) {
                    return {
                        ...questionData,
                        source: `${questionBank[course].course_name} - ${chapter}`
                    };
                }
            }
        }
        
        return null;
    }

    /**
     * 判断题目是否匹配
     */
    function isQuestionMatch(q1, q2) {
        if (!q1 || !q2) return false;
        
        // 完全相同
        if (q1 === q2) return true;
        
        // 相互包含
        if (q1.includes(q2) || q2.includes(q1)) return true;
        
        // 长度大于5时，使用关键词匹配
        if (q1.length > 5 && q2.length > 5) {
            const keywords1 = extractKeywords(q1);
            const keywords2 = extractKeywords(q2);
            
            if (keywords1.length > 0 && keywords2.length > 0) {
                const commonKeywords = keywords1.filter(k => keywords2.includes(k));
                const similarity = commonKeywords.length / Math.max(keywords1.length, keywords2.length);
                return similarity > 0.4;
            }
        }
        
        return false;
    }

    /**
     * 清理题目文本
     */
    function cleanQuestionText(text) {
        if (!text) return '';
        
        // 1. 移除HTML标签
        let cleaned = text.replace(/<[^>]*>/g, '');
        
        // 2. 移除题目类型标记
        cleaned = cleaned.replace(/\[.*?\]/g, '');
        
        // 3. 移除题号前缀
        cleaned = cleaned.replace(/^\d+[．\.]\s*/, '');
        
        // 4. 移除特殊字符和多余空格
        cleaned = cleaned.replace(/[，。；：（）【】《》]/g, '')
                         .replace(/\s+/g, ' ')
                         .trim();
        
        return cleaned.toLowerCase();
    }

    /**
     * 提取关键词
     */
    function extractKeywords(text) {
        // 移除常见停用词
        const stopWords = ['的', '了', '在', '是', '和', '与', '或', '及', '等', '对', '就', '都', '而', '且', '但', '也', '又', '再', '还', '已经'];
        
        return text.split(/[\s,，。.;;?!?！？]/)
            .filter(word => word.length > 1 && !stopWords.includes(word))
            .map(word => word.toLowerCase());
    }

    /**
     * 处理单选题 - 专门修复选项查找
     */
    async function handleSingleChoice(questionElement) {
        const questionText = getQuestionText(questionElement);
        const cleanQuestion = cleanQuestionText(questionText);
        
        addLog(`处理单选题: ${cleanQuestion.substring(0, 50)}...`, 'info');

        const questionData = findAnswer(questionText);
        if (!questionData) {
            addLog(`未找到答案`, 'warning');
            return;
        }

        // 查找所有选项 - 针对新的页面结构
        const options = findSingleChoiceOptions(questionElement);
        
        if (options.length === 0) {
            addLog('未找到选项', 'warning');
            // 尝试其他查找方法
            const alternativeOptions = findAlternativeOptions(questionElement);
            if (alternativeOptions.length > 0) {
                addLog(`通过备用方法找到 ${alternativeOptions.length} 个选项`, 'info');
                await selectSingleChoiceOption(questionData, alternativeOptions);
            }
            return;
        }

        // 记录找到的选项
        addLog(`找到 ${options.length} 个选项: ${options.map(opt => `${opt.text}(value=${opt.value})`).join(', ')}`, 'info');

        // 匹配答案
        await selectSingleChoiceOption(questionData, options);
    }

    /**
     * 查找单选题选项 - 新的查找逻辑
     */
    function findSingleChoiceOptions(questionElement) {
        const options = [];
        
        // 方法1：查找题目容器后的所有选项
        const questionContainer = questionElement.closest('.form-group.row');
        if (!questionContainer) return options;
        
        // 查找当前题目所在块中的所有选项
        const blockContent = questionElement.closest('.block-content');
        if (!blockContent) return options;
        
        // 找到当前题目的索引位置
        const allQuestions = blockContent.querySelectorAll('.form-material-success:has(b)');
        let currentQuestionIndex = -1;
        for (let i = 0; i < allQuestions.length; i++) {
            if (allQuestions[i] === questionElement) {
                currentQuestionIndex = i;
                break;
            }
        }
        
        if (currentQuestionIndex === -1) return options;
        
        // 查找当前题目的选项
        const allOptionRows = blockContent.querySelectorAll('.form-group.row');
        const questionRow = questionContainer;
        
        // 从当前题目行开始，向后查找选项
        let currentRow = questionRow;
        while (currentRow) {
            currentRow = currentRow.nextElementSibling;
            if (!currentRow) break;
            
            // 如果遇到下一个题目，停止查找
            if (currentRow.querySelector('.form-material-success:has(b)')) {
                break;
            }
            
            // 查找单选按钮
            const radios = currentRow.querySelectorAll('input[type="radio"]');
            if (radios.length > 0) {
                radios.forEach(radio => {
                    const label = radio.closest('label');
                    if (label) {
                        const optionText = getOptionText(label);
                        options.push({
                            radio: radio,
                            value: radio.value,
                            text: optionText
                        });
                    }
                });
            }
        }
        
        return options;
    }

    /**
     * 备用选项查找方法
     */
    function findAlternativeOptions(questionElement) {
        const options = [];
        
        // 方法2：在整个区块中查找所有选项
        const blockContent = questionElement.closest('.block-content');
        if (!blockContent) return options;
        
        // 查找所有的单选按钮
        const allRadios = blockContent.querySelectorAll('input[type="radio"]');
        allRadios.forEach(radio => {
            const label = radio.closest('label');
            if (label) {
                const optionText = getOptionText(label);
                options.push({
                    radio: radio,
                    value: radio.value,
                    text: optionText
                });
            }
        });
        
        // 去重
        const uniqueOptions = [];
        const seen = new Set();
        options.forEach(opt => {
            const key = `${opt.value}-${opt.text}`;
            if (!seen.has(key)) {
                seen.add(key);
                uniqueOptions.push(opt);
            }
        });
        
        return uniqueOptions;
    }

    /**
     * 选择单选题选项
     */
    async function selectSingleChoiceOption(questionData, options) {
        const answer = questionData.answer.trim().toUpperCase();
        let targetOption = null;

        // 策略1：根据答案字母直接匹配（A=0, B=1, C=2, D=3）
        const answerIndex = answer.charCodeAt(0) - 65; // A=65, B=66...
        
        // 检查答案字母是否有效
        if (answerIndex >= 0 && answerIndex < 26) {
            // 先尝试根据选项文本中的字母匹配
            targetOption = options.find(opt => {
                const optText = opt.text.toUpperCase();
                return optText.startsWith(answer) || optText.includes(`.${answer}`);
            });
        }

        // 策略2：如果题库有选项内容，尝试匹配选项文本
        if (!targetOption && questionData.options && questionData.options.length > 0) {
            const answerIndex = answer.charCodeAt(0) - 65;
            if (answerIndex >= 0 && answerIndex < questionData.options.length) {
                const correctOptionText = questionData.options[answerIndex] || '';
                if (correctOptionText) {
                    targetOption = options.find(opt => {
                        const cleanOption = cleanQuestionText(opt.text);
                        const cleanCorrect = cleanQuestionText(correctOptionText);
                        return cleanOption.includes(cleanCorrect) || cleanCorrect.includes(cleanOption);
                    });
                }
            }
        }

        // 策略3：根据选项值匹配（假设value="0"对应A，value="1"对应B等）
        if (!targetOption) {
            const valueMap = { 'A': '0', 'B': '1', 'C': '2', 'D': '3' };
            const targetValue = valueMap[answer];
            if (targetValue) {
                targetOption = options.find(opt => opt.value === targetValue);
            }
        }

        if (targetOption) {
            if (!targetOption.radio.checked) {
                targetOption.radio.click();
                addLog(`已选择: ${answer} (${targetOption.text})`, 'success');
            } else {
                addLog(`选项 ${answer} 已选中`, 'info');
            }
        } else {
            addLog(`无法匹配选项，答案: ${answer}`, 'warning');
            console.log('可用选项:', options.map(opt => ({text: opt.text, value: opt.value})));
            console.log('题库选项:', questionData.options);
        }
    }

    /**
     * 处理判断题
     */
    async function handleJudgment(questionElement) {
        const questionText = getQuestionText(questionElement);
        const cleanQuestion = cleanQuestionText(questionText);
        
        addLog(`处理判断题: ${cleanQuestion.substring(0, 50)}...`, 'info');

        const questionData = findAnswer(questionText);
        if (!questionData) {
            addLog(`未找到答案`, 'warning');
            return;
        }

        // 查找选项
        const options = findRadioOptions(questionElement);
        
        if (options.length === 0) {
            addLog('未找到判断题选项', 'warning');
            return;
        }

        // 记录找到的选项
        addLog(`找到 ${options.length} 个选项`, 'info');

        // 判断题答案标准化
        const answer = questionData.answer.trim();
        let targetOption = null;

        // 策略1：根据答案文本匹配选项
        if (answer === '正确' || answer === '对' || answer === '是') {
            targetOption = options.find(opt => 
                opt.text.includes('正确') || opt.text.includes('对') || opt.text.includes('是')
            );
        } else if (answer === '错误' || answer === '错' || answer === '否') {
            targetOption = options.find(opt => 
                opt.text.includes('错误') || opt.text.includes('错') || opt.text.includes('否')
            );
        }

        // 策略2：根据value匹配
        if (!targetOption) {
            if (answer === '正确' || answer === '对' || answer === '是') {
                targetOption = options.find(opt => opt.value === '1');
            } else if (answer === '错误' || answer === '错' || answer === '否') {
                targetOption = options.find(opt => opt.value === '0');
            }
        }

        // 策略3：根据选项顺序匹配
        if (!targetOption && options.length >= 2) {
            if (answer === '正确' || answer === '对' || answer === '是') {
                targetOption = options[0];
            } else if (answer === '错误' || answer === '错' || answer === '否') {
                targetOption = options[1];
            }
        }

        if (targetOption) {
            if (!targetOption.radio.checked) {
                targetOption.radio.click();
                addLog(`已选择: ${answer}`, 'success');
            }
        } else {
            addLog(`无法匹配判断题选项，答案: ${answer}`, 'warning');
        }
    }

    /**
     * 查找单选/判断题选项
     */
    function findRadioOptions(questionElement) {
        const options = [];
        
        // 查找当前题目所在容器的后续兄弟节点
        let currentElement = questionElement.closest('.form-group.row');
        
        while (currentElement) {
            const radios = currentElement.querySelectorAll('input[type="radio"]');
            if (radios.length > 0) {
                radios.forEach(radio => {
                    const label = radio.closest('label');
                    if (label) {
                        const optionText = getOptionText(label);
                        options.push({
                            radio: radio,
                            value: radio.value,
                            text: optionText
                        });
                    }
                });
                break; // 找到选项后就停止
            }
            currentElement = currentElement.nextElementSibling;
            
            // 如果遇到下一个题目，停止查找
            if (currentElement && currentElement.querySelector('.form-material-success:has(b)')) {
                break;
            }
        }
        
        return options;
    }

    /**
     * 处理简答题
     */
    async function handleShortAnswer(questionElement) {
        const questionText = getQuestionText(questionElement);
        addLog(`处理简答题: ${questionText.substring(0, 50)}...`, 'info');

        const questionData = findAnswer(questionText);
        if (!questionData) {
            addLog(`未找到答案`, 'warning');
            return;
        }

        // 查找textarea
        const questionRow = questionElement.closest('.form-group.row');
        if (!questionRow) return;

        let currentRow = questionRow.nextElementSibling;
        let textarea = null;

        while (currentRow) {
            textarea = currentRow.querySelector('textarea');
            if (textarea) break;
            currentRow = currentRow.nextElementSibling;
        }

        if (!textarea) {
            addLog('未找到文本输入框', 'warning');
            return;
        }

        // 填入答案
        textarea.value = questionData.answer;
        textarea.dispatchEvent(new Event('input', { bubbles: true }));
        textarea.dispatchEvent(new Event('change', { bubbles: true }));
        
        addLog('简答题答案已填入', 'success');
    }

    /**
     * 获取题目文本
     */
    function getQuestionText(element) {
        if (!element) return '';
        
        // 复制元素以避免修改原DOM
        const clone = element.cloneNode(true);
        
        // 移除所有.luanma元素
        clone.querySelectorAll('.luanma').forEach(el => el.remove());
        
        // 获取文本并清理
        let text = clone.textContent || clone.innerText || '';
        
        return text.trim();
    }

    /**
     * 获取选项文本
     */
    function getOptionText(label) {
        if (!label) return '';
        
        // 复制元素以避免修改原DOM
        const clone = label.cloneNode(true);
        
        // 移除.luanma元素
        clone.querySelectorAll('.luanma').forEach(el => el.remove());
        
        let text = clone.textContent || clone.innerText || '';
        
        return text.trim();
    }

    /**
     * 自动答题主函数
     */
    async function autoAnswer() {
        addLog('=== 开始自动答题 ===', 'info');
        
        if (Object.keys(questionBank).length === 0) {
            addLog('错误：请先导入题库文件', 'error');
            return;
        }

        // 等待页面加载
        await new Promise(resolve => setTimeout(resolve, 1000));

        // 查找所有题目
        const questionElements = document.querySelectorAll('.form-material-success:has(b)');
        addLog(`找到 ${questionElements.length} 道题目`, 'info');

        // 处理每道题
        for (const questionElement of questionElements) {
            const questionText = getQuestionText(questionElement);
            
            if (questionText.includes('单选')) {
                await handleSingleChoice(questionElement);
            } else if (questionText.includes('判断')) {
                await handleJudgment(questionElement);
            } else if (questionText.includes('简答')) {
                await handleShortAnswer(questionElement);
            }
            
            // 每道题之间短暂延迟
            await new Promise(resolve => setTimeout(resolve, 300));
        }

        addLog('=== 答题完成 ===', 'success');
        
        // 自动提交
        setTimeout(autoSubmit, 1500);
    }

    /**
     * 自动提交
     */
    function autoSubmit() {
        const submitSelectors = [
            '#submit',
            '.submit-btn',
            '[type="submit"]',
            '.btn-submit',
            '#btnSubmit',
            'button:contains("提交")'
        ];

        for (const selector of submitSelectors) {
            const submitBtn = document.querySelector(selector);
            if (submitBtn) {
                submitBtn.click();
                addLog('已自动提交答案', 'success');
                return;
            }
        }

        addLog('未找到提交按钮，请手动提交', 'warning');
    }

    /**
     * 调试函数：显示所有题目和选项
     */
    function debugAllQuestions() {
        const questionElements = document.querySelectorAll('.form-material-success:has(b)');
        console.log(`调试：找到 ${questionElements.length} 道题目`);
        
        questionElements.forEach((element, index) => {
            const questionText = getQuestionText(element);
            const options = findSingleChoiceOptions(element);
            
            console.log(`题目${index+1}: ${questionText.substring(0, 60)}...`);
            console.log(`  选项数: ${options.length}`);
            
            options.forEach((opt, optIndex) => {
                console.log(`  选项${optIndex+1}: value="${opt.value}", text="${opt.text}"`);
            });
            console.log('---');
        });
        
        addLog('调试信息已在控制台输出', 'success');
    }

    // 日志系统
    function addLog(message, type = 'info') {
        const timestamp = new Date().toLocaleTimeString();
        const logEntry = {
            time: timestamp,
            message: message,
            type: type
        };
        logs.unshift(logEntry);
        if (logs.length > 100) logs.length = 100;
        updateLogDisplay();
    }

    function updateLogDisplay() {
        const logList = document.getElementById('answerScriptLogs');
        if (!logList) return;
        
        logList.innerHTML = '';
        logs.forEach(log => {
            const logItem = document.createElement('div');
            logItem.className = `log-item log-${log.type}`;
            logItem.innerHTML = `<span class="log-time">[${log.time}]</span> ${log.message}`;
            logList.appendChild(logItem);
        });
    }

    // 控制面板创建函数
    function createControlPanel() {
        const panel = document.createElement('div');
        panel.id = 'answerScriptPanel';
        
        // 获取保存的位置
        const savedPosition = GM_getValue('panelPosition') || { top: '20px', right: '20px' };
        
        panel.style.cssText = `
            position: fixed;
            top: ${savedPosition.top};
            right: ${savedPosition.right};
            width: 400px;
            max-height: 600px;
            background: white;
            border: 2px solid #4CAF50;
            border-radius: 10px;
            box-shadow: 0 10px 30px rgba(0,0,0,0.3);
            z-index: 9999;
            font-family: 'Microsoft YaHei', Arial, sans-serif;
            overflow: hidden;
            resize: both;
        `;

        panel.innerHTML = `
            <div style="background: linear-gradient(135deg, #4CAF50 0%, #45a049 100%); color: white; padding: 15px; font-weight: bold; cursor: move; display: flex; justify-content: space-between; align-items: center; user-select: none;">
                <span><i class="fas fa-book"></i> 创新考试-贤程教育 v10.01</span>
                <div>
                    <button id="minimizeBtn" style="background: transparent; border: none; color: white; font-size: 18px; cursor: pointer; margin-right: 8px; width: 24px; height: 24px; line-height: 24px;">−</button>
                    <button id="closeBtn" style="background: transparent; border: none; color: white; font-size: 16px; cursor: pointer; width: 24px; height: 24px; line-height: 24px;">×</button>
                </div>
            </div>
            <div id="panelBody" style="padding: 15px; max-height: 520px; overflow-y: auto;">
                <div style="margin-bottom: 15px;">
                    <div style="display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 12px;">
                        <button id="autoAnswerBtn" style="background: #4CAF50; color: white; border: none; padding: 10px 15px; border-radius: 5px; cursor: pointer; flex: 1; font-size: 14px;">
                            <i class="fas fa-bolt"></i> 自动答题
                        </button>
                        <button id="debugBtn" style="background: #9C27B0; color: white; border: none; padding: 10px 15px; border-radius: 5px; cursor: pointer; font-size: 14px;">
                            <i class="fas fa-bug"></i> Q1123115811
                        </button>
                    </div>
                    
                    <div style="background: #f8f9fa; padding: 12px; border-radius: 5px; margin-bottom: 12px;">
                        <div style="font-weight: bold; margin-bottom: 5px; color: #333; font-size: 14px;">
                            <i class="fas fa-file-import"></i> 导入题库
                        </div>
                        <input type="file" id="importFile" accept=".json" style="width: 100%; padding: 6px; margin-bottom: 8px; border: 1px solid #ddd; border-radius: 3px; font-size: 12px;">
                        <div style="font-size: 11px; color: #666; margin-bottom: 8px;">
                            请选择JSON题库文件（支持多个文件合并）
                        </div>
                        <div style="display: flex; gap: 8px;">
                            <button id="exportBtn" style="background: #2196F3; color: white; border: none; padding: 8px 12px; border-radius: 3px; cursor: pointer; flex: 1; font-size: 12px;">
                                <i class="fas fa-file-export"></i> 导出题库
                            </button>
                            <button id="cleanBtn" style="background: #FF9800; color: white; border: none; padding: 8px 12px; border-radius: 3px; cursor: pointer; flex: 1; font-size: 12px;">
                                <i class="fas fa-trash-alt"></i> 清理重复
                            </button>
                        </div>
                    </div>
                </div>
                
                <div style="background: #f8f9fa; padding: 12px; border-radius: 5px; margin-bottom: 12px;">
                    <div id="statsDisplay" style="font-size: 12px; color: #666; line-height: 1.5;">
                        请导入题库文件...
                    </div>
                </div>
                
                <div style="background: #f8f9fa; padding: 12px; border-radius: 5px;">
                    <div style="display: flex; justify-content: space-between; align-items: center; margin-bottom: 5px;">
                        <div style="font-weight: bold; color: #333; font-size: 14px;">
                            <i class="fas fa-clipboard-list"></i> 操作日志
                        </div>
                        <button id="clearLogsBtn" style="background: transparent; border: none; color: #666; font-size: 12px; cursor: pointer; padding: 2px 6px;">
                            <i class="fas fa-trash"></i> 清空
                        </button>
                    </div>
                    <div id="logContainer" style="background: white; border-radius: 5px; padding: 8px; max-height: 200px; overflow-y: auto; font-size: 11px; border: 1px solid #ddd;">
                        <div id="answerScriptLogs"></div>
                    </div>
                </div>
            </div>
        `;

        document.body.appendChild(panel);
        initPanelEvents();
        makePanelDraggable();
    }

    // 初始化面板事件
    function initPanelEvents() {
        document.getElementById('autoAnswerBtn').addEventListener('click', () => {
            addLog('开始自动答题...', 'info');
            autoAnswer();
        });

        document.getElementById('debugBtn').addEventListener('click', () => {
            debugAllQuestions();
        });

        document.getElementById('exportBtn').addEventListener('click', () => {
            exportQuestionBank();
        });

        document.getElementById('cleanBtn').addEventListener('click', () => {
            cleanQuestionBank();
        });

        document.getElementById('clearLogsBtn').addEventListener('click', () => {
            logs = [];
            updateLogDisplay();
            addLog('日志已清空', 'info');
        });

        document.getElementById('importFile').addEventListener('change', async (e) => {
            const file = e.target.files[0];
            if (!file) return;
            
            addLog(`正在导入: ${file.name}`, 'info');
            
            try {
                await loadQuestionBankFromFile(file);
                e.target.value = '';
                addLog('题库导入成功，可以开始答题', 'success');
            } catch (error) {
                addLog(`导入失败: ${error.message}`, 'error');
            }
        });

        document.getElementById('minimizeBtn').addEventListener('click', () => {
            const panelBody = document.getElementById('panelBody');
            const minimizeBtn = document.getElementById('minimizeBtn');
            
            if (panelBody.style.display === 'none') {
                panelBody.style.display = 'block';
                minimizeBtn.textContent = '−';
            } else {
                panelBody.style.display = 'none';
                minimizeBtn.textContent = '+';
            }
        });

        document.getElementById('closeBtn').addEventListener('click', () => {
            const panel = document.getElementById('answerScriptPanel');
            if (panel) {
                panel.style.display = 'none';
                addLog('控制面板已隐藏，刷新页面可重新显示', 'warning');
            }
        });
    }

    // 使面板可拖动
    function makePanelDraggable() {
        const panel = document.getElementById('answerScriptPanel');
        const header = panel.querySelector('div[style*="gradient"]');
        
        let isDragging = false;
        let offsetX, offsetY;

        header.addEventListener('mousedown', startDrag);
        document.addEventListener('mousemove', drag);
        document.addEventListener('mouseup', stopDrag);

        function startDrag(e) {
            isDragging = true;
            const rect = panel.getBoundingClientRect();
            offsetX = e.clientX - rect.left;
            offsetY = e.clientY - rect.top;
            header.style.cursor = 'grabbing';
        }

        function drag(e) {
            if (!isDragging) return;
            e.preventDefault();
            
            // 计算新位置
            let newLeft = e.clientX - offsetX;
            let newTop = e.clientY - offsetY;
            
            // 限制在视窗内
            const viewportWidth = window.innerWidth;
            const viewportHeight = window.innerHeight;
            const panelWidth = panel.offsetWidth;
            const panelHeight = panel.offsetHeight;
            
            newLeft = Math.max(0, Math.min(newLeft, viewportWidth - panelWidth));
            newTop = Math.max(0, Math.min(newTop, viewportHeight - panelHeight));
            
            // 应用新位置
            panel.style.left = newLeft + 'px';
            panel.style.top = newTop + 'px';
            panel.style.right = 'auto';
        }

        function stopDrag() {
            if (!isDragging) return;
            
            isDragging = false;
            header.style.cursor = 'move';
            
            // 保存位置
            const position = {
                top: panel.style.top,
                left: panel.style.left
            };
            GM_setValue('panelPosition', position);
        }
    }

    /**
     * 初始化脚本
     */
    async function init() {
        console.log('=== 国际贸易实务自动答题脚本启动 ===');
        
        // 添加样式
        addStyles();
        
        // 创建控制面板
        createControlPanel();
        
        // 初始化题库
        initQuestionBank();
        
        addLog('脚本初始化完成', 'success');
        addLog('请导入题库JSON文件，然后点击"自动答题"', 'info');
    }

    function addStyles() {
        const style = document.createElement('style');
        style.textContent = `
            .log-item {
                padding: 4px 0;
                border-bottom: 1px solid #eee;
                font-family: 'Microsoft YaHei', Arial, sans-serif;
                font-size: 11px;
                line-height: 1.3;
            }
            .log-item:last-child {
                border-bottom: none;
            }
            .log-info {
                color: #2196F3;
            }
            .log-success {
                color: #4CAF50;
                font-weight: bold;
            }
            .log-error {
                color: #F44336;
            }
            .log-warning {
                color: #FF9800;
            }
            .log-time {
                color: #9E9E9E;
                font-size: 10px;
                margin-right: 5px;
            }
            
            /* 面板调整大小样式 */
            #answerScriptPanel {
                resize: both;
                overflow: hidden;
                min-width: 350px;
                min-height: 200px;
                max-width: 90vw;
                max-height: 90vh;
            }
            
            #answerScriptPanel::-webkit-resizer {
                background-color: #4CAF50;
                padding: 5px;
            }
        `;
        document.head.appendChild(style);
    }

    // 添加Font Awesome图标
    const faLink = document.createElement('link');
    faLink.rel = 'stylesheet';
    faLink.href = 'https://cdnjs.cloudflare.com/ajax/libs/font-awesome/6.4.0/css/all.min.css';
    document.head.appendChild(faLink);

    // 页面加载完成后执行
    if (document.readyState === 'loading') {
        document.addEventListener('DOMContentLoaded', init);
    } else {
        init();
    }
})();