// ==UserScript==
// @name         超星学习通自动答题（章节）
// @namespace    http://tampermonkey.net/
// @version      1.0.0
// @description  学习通章节答题
// @author       dmhnb6 (Modified by AI)
// @match        *://*.chaoxing.com/*
// @match        *://*.edu.cn/*
// @grant        GM_xmlhttpRequest
// @connect      api.deepseek.com
// @original-author dmhnb6
// @original-license MIT
// @original-script https://scriptcat.org/zh-CN/script-show-page/6071
// ==/UserScript==

(function() {
    'use strict';

    // ======== 用户配置区 ========
    const API_KEY = 'API'; 
    const DELAY = 1000; // 适中的延迟，保证稳定
    // ===========================

    let isPaused = false;
    let isRunning = false;
    let currentIdx = 0;
    let uiCreated = false;
    const sleep = (ms) => new Promise(resolve => setTimeout(resolve, ms));

    let panel, progressBar, progressText, statusLabel, startBtn, pauseBtn;

    function createUI() {
        if (uiCreated) return;
        uiCreated = true;

        panel = document.createElement('div');
        panel.style = "position:fixed;top:20px;right:20px;z-index:2147483647;width:320px;background:#fff;padding:15px;border-radius:10px;box-shadow:0 10px 30px rgba(0,0,0,0.4);font-family:sans-serif;border:2px solid #8e44ad;";
        panel.innerHTML = `
            <div style="margin-bottom:10px;font-weight:bold;color:#333;display:flex;justify-content:space-between;border-bottom:1px solid #ddd;padding-bottom:5px;">
                <span>🎯 答题助手</span>
                <span id="auto-status-label" style="color:#8e44ad;font-size:12px;">已就绪</span>
            </div>
            <div style="width:100%;background:#eee;border-radius:5px;height:10px;overflow:hidden;margin-bottom:10px;">
                <div id="auto-progress-bar" style="width:0%;height:100%;background:#8e44ad;transition:width 0.3s;"></div>
            </div>
            <div style="display:flex;justify-content:space-between;align-items:center;">
                <span id="auto-progress-text" style="font-size:12px;color:#666;">等待开始...</span>
                <div>
                    <button id="auto-pause-btn" style="padding:6px 12px;background:#e74c3c;color:#fff;border:none;border-radius:4px;cursor:pointer;margin-right:5px;display:none;">暂停</button>
                    <button id="auto-start-btn" style="padding:6px 15px;background:#2ecc71;color:#fff;border:none;border-radius:4px;cursor:pointer;font-weight:bold;">开始自动答题</button>
                </div>
            </div>
        `;
        document.body.appendChild(panel);

        progressBar = document.getElementById('auto-progress-bar');
        progressText = document.getElementById('auto-progress-text');
        statusLabel = document.getElementById('auto-status-label');
        startBtn = document.getElementById('auto-start-btn');
        pauseBtn = document.getElementById('auto-pause-btn');

        startBtn.onclick = () => {
            if (!isRunning) {
                currentIdx = 0;
                isRunning = true;
                isPaused = false;
                startBtn.style.display = 'none';
                pauseBtn.style.display = 'inline-block';
                pauseBtn.innerText = '暂停';
                pauseBtn.style.background = '#e74c3c';
                startSolve();
            }
        };

        pauseBtn.onclick = () => {
            isPaused = !isPaused;
            pauseBtn.innerText = isPaused ? '恢复' : '暂停';
            pauseBtn.style.background = isPaused ? '#f1c40f' : '#e74c3c';
            statusLabel.innerText = isPaused ? '已暂停' : '运行中';
        };
    }

    async function getAIResponse(question, options, type) {
        // 【核心恢复】：恢复 V5 原汁原味的高效 Prompt
        let sys = "你是一个专业的大学考试答题专家。请先在心里一步步分析题目，然后**必须**将最终答案放在英文方括号内，格式如：[A] 或 [ABC] 或 [正确]。除了方括号内的答案，不要输出多余的解释。";
        
        // 只有遇到填空题时，才追加填空题的格式要求
        if (type.includes("填空")) {
            sys += "注意：遇到填空题，请将所有空的答案放进同一个方括号内，并用###分隔，例如：[答案一###答案二]。";
        }

        return new Promise((resolve) => {
            GM_xmlhttpRequest({
                method: "POST",
                url: "https://api.deepseek.com/chat/completions",
                headers: { "Content-Type": "application/json", "Authorization": `Bearer ${API_KEY}` },
                data: JSON.stringify({
                    model: "deepseek-chat", 
                    messages:[{ role: "system", content: sys }, { role: "user", content: `题型:${type}\n题目:${question}\n${options ? '选项:\n' + options : ''}` }],
                    temperature: 0.1
                }),
                onload: (res) => {
                    try { 
                        let content = JSON.parse(res.responseText).choices[0].message.content.trim();
                        let match = content.match(/\[(.*?)\]/);
                        if (match) {
                            resolve(match[1]); 
                        } else {
                            resolve(content); 
                        }
                    } catch { resolve(null); }
                },
                onerror: () => resolve(null)
            });
        });
    }

    async function startSolve() {
        let sheetItems = document.querySelectorAll('.questionLi, .TiMu');
        const total = sheetItems.length;

        if (total === 0) {
            alert("未找到题目！");
            isRunning = false;
            startBtn.style.display = 'inline-block';
            pauseBtn.style.display = 'none';
            return;
        }

        for (; currentIdx < total; currentIdx++) {
            while (isPaused) { await sleep(300); }

            const percent = Math.floor(((currentIdx + 1) / total) * 100);
            progressBar.style.width = `${percent}%`;
            progressText.innerText = `${currentIdx + 1} / ${total} (${percent}%)`;

            const q = sheetItems[currentIdx];
            q.scrollIntoView({ behavior: 'smooth', block: 'center' });
            await sleep(300);

            const titleEl = q.querySelector('h3.mark_name, div.mark_name, .Zy_TItle .clearfix');
            let typeText = titleEl ? titleEl.innerText : "";
            let type = typeText.includes('多选') ? "多选题" : typeText.includes('单选') ? "单选题" : typeText.includes('判断') ? "判断题" : typeText.includes('填空') ? "填空题" : "未知";
            const questionText = typeText.replace(/【.*?】/, '').replace(/\s+/g, ' ').trim();

            statusLabel.innerText = `答题中: 第 ${currentIdx + 1} 题...`;

            if (type.includes("填空") || type.includes("简答")) {
                const response = await getAIResponse(questionText, null, type);
                if (response) {
                    const answers = type.includes("填空") ? response.split('###') : [response];
                    let fillIndex = 0;

                    // 【核心保留】：保留 V6 的强力富文本注入代码
                    if (window.unsafeWindow && window.unsafeWindow.UE && window.unsafeWindow.UE.instants) {
                        for (let key in window.unsafeWindow.UE.instants) {
                            let ue = window.unsafeWindow.UE.instants[key];
                            if (q.contains(ue.container) && fillIndex < answers.length) {
                                let ansText = answers[fillIndex] ? answers[fillIndex].trim() : "";
                                try {
                                    ue.ready(() => { ue.setContent(ansText); });
                                } catch(e) {}
                                fillIndex++;
                            }
                        }
                    }

                    if (fillIndex === 0) {
                        const textareas = q.querySelectorAll('textarea');
                        for(let i=0; i<textareas.length; i++) {
                            if(textareas[i].style.display !== 'none' && fillIndex < answers.length) {
                                textareas[i].value = answers[fillIndex] ? answers[fillIndex].trim() : "";
                                textareas[i].dispatchEvent(new Event('input', { bubbles: true }));
                                textareas[i].dispatchEvent(new Event('change', { bubbles: true }));
                                fillIndex++;
                            }
                        }
                    }
                }
            } else {
                const optionElements = q.querySelectorAll('.answerBg, .q_option, .Zy_ulTop li');
                let opts = Array.from(optionElements).map(opt => opt.innerText.trim()).join('\n');
                
                const result = await getAIResponse(questionText, opts, type);
                if (result) {
                    const resUpper = result.toUpperCase();
                    optionElements.forEach(opt => {
                        const letterEl = opt.querySelector('[class*="num_option"], i.fl');
                        const letter = letterEl ? letterEl.innerText.trim().toUpperCase() : opt.innerText.trim().charAt(0).toUpperCase();
                        
                        let shouldClick = false;
                        if (letter && resUpper.includes(letter)) shouldClick = true;
                        else if ((resUpper.includes("正确") || resUpper === "A" || resUpper === "√" || resUpper === "对") && (opt.innerText.includes("正确") || opt.innerText.includes("√") || opt.innerText.includes("对"))) shouldClick = true;
                        else if ((resUpper.includes("错误") || resUpper === "B" || resUpper === "×" || resUpper === "错") && (opt.innerText.includes("错误") || opt.innerText.includes("×") || opt.innerText.includes("错"))) shouldClick = true;

                        if (shouldClick) {
                            const isChecked = opt.getAttribute('aria-checked') === 'true' || opt.querySelector('input:checked');
                            if (!isChecked) {
                                const clickTarget = opt.querySelector('label, input') || opt;
                                clickTarget.click();
                            }
                        }
                    });
                }
            }

            statusLabel.innerText = `第 ${currentIdx + 1} 题完成...`;
            await sleep(DELAY + Math.random() * 300);
        }

        isRunning = false;
        statusLabel.innerText = "全部作答完成";
        pauseBtn.style.display = 'none';
        startBtn.style.display = 'inline-block';
        startBtn.innerText = '重新开始';
        alert("作答完毕！");
    }

    setInterval(() => {
        if (!uiCreated && document.querySelectorAll('.questionLi, .TiMu').length > 0) {
            createUI();
        }
    }, 1000);

})();