// ==UserScript==
// @name         中南林一键评教
// @namespace    http://tampermonkey.net/
// @version      1.3
// @description  自动完成教学质量平台的学生评教（满分策略，随机一题减1分）
// @author       spider-go
// @match        *://*.webvpn.csuft.edu.cn/*
// @match        *://jxzlpt.csuft.edu.cn/*
// @icon         https://www.csuft.edu.cn/favicon.ico
// @grant        none
// @run-at       document-end
// @license MIT
// ==/UserScript==

(function() {
    'use strict';

    var host = window.location.hostname;
    if (host.indexOf('jxzlpt') === -1) return;

    console.log('[一键评教] 已加载');

    // ========== 评语库 ==========
    var COMMENTS = [
        '老师授课认真负责，教学效果好',
        '老师教学内容丰富，讲解清晰透彻',
        '老师备课充分，课堂互动良好',
        '老师治学严谨，对学生要求严格但耐心',
        '老师上课生动有趣，能调动学生积极性',
        '老师知识渊博，能理论联系实际',
        '老师讲课重点突出，逻辑性强',
        '老师认真负责，关心学生学习情况',
        '老师教学方法灵活，课堂气氛活跃',
        '老师讲解深入浅出，易于理解',
    ];
    var useRandom = localStorage.getItem('spider_eval_random') !== '0';

    // ========== 样式 ==========
    var style = document.createElement('style');
    style.textContent = [
        '.spider-eval-btn{position:fixed!important;z-index:99999!important;padding:clamp(8px,2vw,16px) clamp(16px,4vw,32px)!important;',
        'background:linear-gradient(135deg,#667eea,#764ba2)!important;color:#fff!important;',
        'border:none!important;border-radius:clamp(25px,5vw,50px)!important;font-size:clamp(12px,2.5vw,18px)!important;',
        'font-weight:600!important;cursor:pointer!important;',
        'box-shadow:0 4px 15px rgba(102,126,234,0.4)!important;',
        'font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif!important;}',
        '.spider-eval-btn:hover{box-shadow:0 6px 20px rgba(102,126,234,0.6)!important;}',
        '.spider-eval-btn:disabled{opacity:.6!important;cursor:not-allowed!important;}',
        '.spider-eval-box{position:fixed!important;z-index:99999!important;',
        'display:inline-flex!important;align-items:center!important;gap:6px!important;',
        'background:rgba(248,249,252,.92)!important;backdrop-filter:blur(6px)!important;',
        'border-radius:16px!important;padding:6px 10px!important;',
        'box-shadow:0 4px 20px rgba(0,0,0,.1)!important;',
        'border:1px solid rgba(255,255,255,.6)!important;',
        'cursor:grab!important;user-select:none!important;',
        'font-family:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif!important;}',
        '.spider-eval-box.dragging{cursor:grabbing!important;opacity:.85!important;}',
        '.spider-eval-box .spider-eval-btn{position:relative!important;z-index:auto!important;cursor:pointer!important;}',
        '.spider-eval-box .spider-eval-tg{position:relative!important;z-index:auto!important;bottom:auto!important;right:auto!important;}',
        '.spider-eval-tg{position:fixed!important;z-index:99999!important;display:flex!important;',
        'align-items:center!important;gap:6px!important;font-size:12px!important;color:#666!important;',
        'cursor:pointer!important;user-select:none!important;background:rgba(255,255,255,.95)!important;',
        'padding:4px 10px!important;border-radius:20px!important;',
        'box-shadow:0 2px 8px rgba(0,0,0,.1)!important;font-family:inherit!important;}',
        '.spider-eval-tg input{display:none!important;}',
        '.spider-eval-tg .sl{width:32px!important;height:18px!important;background:#ccc!important;',
        'border-radius:9px!important;position:relative!important;transition:background .3s!important;flex-shrink:0!important;}',
        '.spider-eval-tg .sl::after{content:""!important;width:14px!important;height:14px!important;',
        'background:#fff!important;border-radius:50%!important;position:absolute!important;',
        'top:2px!important;left:2px!important;transition:transform .3s!important;}',
        '.spider-eval-tg input:checked+.sl{background:#667eea!important;}',
        '.spider-eval-tg input:checked+.sl::after{transform:translateX(14px)!important;}',
        '.spider-eval-lg{position:fixed!important;z-index:99998!important;width:400px!important;',
        'max-height:250px!important;overflow-y:auto!important;background:rgba(0,0,0,.85)!important;',
        'color:#fff!important;border-radius:12px!important;padding:10px 14px!important;',
        'font-size:13px!important;font-family:Consolas,monospace!important;line-height:1.6!important;',
        'display:none!important;box-shadow:0 4px 20px rgba(0,0,0,.3)!important;}',
        '.spider-eval-lg .ok{color:#52c41a;}.spider-eval-lg .er{color:#ff4d4f;}',
        '.spider-eval-lg .in{color:#1890ff;}.spider-eval-lg .wa{color:#faad14;}',
    ].join('');
    document.head.appendChild(style);

    var BASE = window.location.origin;
    var btn, lg;

    function log(msg, t) {
        if (!lg) return;
        var d = document.createElement('div');
        d.className = t;
        d.textContent = '[' + new Date().toLocaleTimeString() + '] ' + msg;
        lg.appendChild(d);
        lg.scrollTop = lg.scrollHeight;
    }

    function gt() {
        var m = document.cookie.match(/(?:^|;\s*)token=([^;]*)/);
        return m ? m[1] : null;
    }

    async function ap(p, b) {
        var h = { 'Accept': 'application/json, text/plain, */*' };
        var t = gt();
        if (t) h['Authorization'] = 'Bearer' + t;
        if (b && typeof b === 'string') h['Content-Type'] = 'application/json;charset=UTF-8';
        var r = await fetch(BASE + p, { method: 'POST', headers: h, credentials: 'include', body: b });
        return await r.json();
    }

    async function getTasks() {
        var d = await ap('/api/xspj/xspj/getXspjtask');
        if (d.code === 200 && d.data && d.data.pageData) return d.data.pageData;
        throw new Error((d && d.message) || '获取任务失败');
    }

    async function getCourses(id) {
        var d = await ap('/api/xspj/xspj/getXspjStudentCourses?taskid=' + id);
        if (d.code === 200 && d.data && d.data.pageData) return d.data.pageData;
        throw new Error((d && d.message) || '获取课程失败');
    }

    async function getQuestions(iid, ct) {
        var d = await ap('/api/xspj/xspj/getXspjTindexSystem?indexid=' + iid + '&pjcoursetype=' + encodeURIComponent(ct));
        if (d.code === 200 && d.data && d.data.pageData) return d.data.pageData;
        throw new Error((d && d.message) || '获取题目失败');
    }

    async function sub(e) {
        var d = await ap('/api/xspj/xspj/saveStudentComment', JSON.stringify(e));
        if (d.code === 200) return true;
        throw new Error((d && d.message) || '提交失败');
    }

    function gen(qs) {
        var ans = [], ts = 0, si = [];
        qs.forEach(function(q, i) {
            var a = { index_order: q.ordor, sfbt: q.isemptyed || '否', yjzb: q.firstlevlindex, index_type: q.type, indexid: q.indexid };
            if (q.type === '打分题' && q.isscored === '是') {
                var s = Math.round(q.score || 10);
                a.index_score = String(s); a.index_title = String(s);
                ts += s; si.push(i);
            } else if (q.type === '问答题') {
                a.index_score = '0';
                a.index_title = (q.isemptyed === '否' && useRandom) ? COMMENTS[Math.floor(Math.random() * COMMENTS.length)] : '';
            }
            ans.push(a);
        });
        if (si.length > 0) {
            var idx = si[Math.floor(Math.random() * si.length)];
            var d = Math.max(0, Math.round(qs[idx].score) - 1);
            ans[idx].index_score = String(d); ans[idx].index_title = String(d);
            ts = ts - Math.round(qs[idx].score) + d;
        }
        return { answers: ans, totalScore: ts };
    }

    async function start() {
        if (!btn || !lg) return;
        btn.disabled = true;
        btn.textContent = '⏳ 评教中...';
        lg.innerHTML = '';
        lg.style.display = 'block';

        try {
            log('获取评教任务...', 'in');
            var tasks = await getTasks();
            log('找到 ' + tasks.length + ' 个任务', 'in');

            var ok = 0, fail = 0, skip = 0;

            for (var t = 0; t < tasks.length; t++) {
                var task = tasks[t];
                if (task.currentStatus !== '进行中') { log('任务已结束，跳过', 'wa'); continue; }
                log('任务：' + task.taskname, 'in');

                var courses = await getCourses(task.taskid);
                log('该任务 ' + courses.length + ' 门课', 'in');

                for (var c = 0; c < courses.length; c++) {
                    var co = courses[c];
                    var key = co.coursename + ' - ' + co.teachername;
                    if (co.hassubmit === 1) { log('⏭️ 已评：' + key, 'wa'); skip++; continue; }

                    log('评教：' + key, 'in');
                    try {
                        var qs = await getQuestions(task.indexid, co.pjcoursetype);
                        if (!qs || qs.length === 0) { log('❌ ' + key + ' 未开放', 'er'); fail++; continue; }
                        var r = gen(qs);
                        var now = new Date();
                        var ct = now.getFullYear() + '-' +
                            String(now.getMonth()+1).padStart(2,'0') + '-' + String(now.getDate()).padStart(2,'0') + ' ' +
                            String(now.getHours()).padStart(2,'0') + ':' + String(now.getMinutes()).padStart(2,'0') + ':' +
                            String(now.getSeconds()).padStart(2,'0');

                        await sub([{
                            taskid: task.taskid, classno: co.classno, coursecode: co.coursecode,
                            coursename: co.coursename, jobnumber: co.jobnumber, studentid: co.studentid,
                            studentname: co.studentname, teachername: co.teachername, yearterm: co.yearterm,
                            totalscore: r.totalScore, pjcoursetype: co.pjcoursetype,
                            courseorgcode: co.courseorgcode, courseorgname: co.courseorgname,
                            evaluateResult: r.answers, commit_time: ct,
                        }]);
                        log('✅ ' + key + '（' + r.totalScore + '分）', 'ok');
                        ok++;
                        await new Promise(function(r2) { setTimeout(r2, 500); });
                    } catch (e) {
                        log('❌ ' + key + '：' + e.message, 'er');
                        fail++;
                    }
                }
            }

            log('==============', 'in');
            if (ok === 0 && fail === 0 && skip > 0) {
                log('全部已评教完毕 ✅', 'ok');
                btn.textContent = '✅ 全部已评';
            } else {
                log('成功 ' + ok + '，失败 ' + fail + '，跳过 ' + skip, ok > 0 ? 'ok' : 'wa');
                btn.textContent = '✅ 完成';
                setTimeout(function() { window.location.reload(); }, 1500);
            }
        } catch (e) {
            log('❌ 错误：' + e.message, 'er');
            btn.textContent = '🤖 一键评教';
        }
        btn.disabled = false;
    }

    // ========== 拖动 ==========
    function makeDraggable(el) {
        var x0, y0, l0, t0, dragging = false;
        function isInteractive(t) {
            while (t && t !== el) {
                if (t.tagName === 'BUTTON' || t.tagName === 'INPUT') return true;
                t = t.parentNode;
            }
            return false;
        }
        function onStart(e) {
            if (btn.disabled) return;
            if (isInteractive(e.target)) return;
            var ev = e.touches ? e.touches[0] : e;
            x0 = ev.clientX; y0 = ev.clientY;
            l0 = el.offsetLeft; t0 = el.offsetTop;
            el.classList.add('dragging');
            dragging = true;
            e.preventDefault();
        }
        function onMove(e) {
            if (!dragging) return;
            var ev = e.touches ? e.touches[0] : e;
            el.style.left = (l0 + ev.clientX - x0) + 'px';
            el.style.top = (t0 + ev.clientY - y0) + 'px';
            el.style.right = 'auto'; el.style.bottom = 'auto';
            e.preventDefault();
        }
        function onEnd() {
            if (!dragging) return;
            dragging = false;
            el.classList.remove('dragging');
        }
        el.addEventListener('mousedown', onStart);
        document.addEventListener('mousemove', onMove);
        document.addEventListener('mouseup', onEnd);
        el.addEventListener('touchstart', onStart, { passive: false });
        document.addEventListener('touchmove', onMove, { passive: false });
        document.addEventListener('touchend', onEnd);
    }

    // ========== 注入 ==========
    function inject() {
        if (document.getElementById('spider-box')) return;

        var box = document.createElement('div');
        box.id = 'spider-box';
        box.className = 'spider-eval-box';
        box.style.bottom = '20px'; box.style.right = '20px';

        btn = document.createElement('button');
        btn.id = 'spider-btn';
        btn.className = 'spider-eval-btn';
        btn.textContent = '🤖 一键评教';
        btn.onclick = start;
        box.appendChild(btn);

        var tg = document.createElement('label');
        tg.className = 'spider-eval-tg';
        tg.innerHTML = '<span>随机评语</span><input type="checkbox"' + (useRandom ? ' checked' : '') +
            '><span class="sl"></span>';
        tg.addEventListener('click', function(e) {
            e.preventDefault();
            var cb = tg.querySelector('input');
            cb.checked = !cb.checked;
            useRandom = cb.checked;
            localStorage.setItem('spider_eval_random', useRandom ? '1' : '0');
        });
        box.appendChild(tg);

        document.body.appendChild(box);
        makeDraggable(box);

        lg = document.createElement('div');
        lg.id = 'spider-lg';
        lg.className = 'spider-eval-lg';
        lg.style.bottom = 'calc(20px + 66px)'; lg.style.right = '20px';
        lg.onclick = function() { lg.style.display = lg.style.display === 'none' ? 'block' : 'none'; };
        document.body.appendChild(lg);

        log('🟢 就绪，点击按钮评教', 'in');
        log('💡 可拖动容器到任意位置', 'in');
    }

    if (document.readyState === 'loading') {
        document.addEventListener('DOMContentLoaded', inject);
    } else {
        inject();
    }

    var iv = setInterval(function() {
        if (document.body && !document.getElementById('spider-box')) inject();
        if (document.getElementById('spider-box')) clearInterval(iv);
    }, 2000);
    setTimeout(function() { clearInterval(iv); }, 10000);
})();