// ==UserScript==
// @name         青书学堂API刷课助手 By:王杰
// @namespace    https://github.com/barryallennnnn
// @version      1.0.2
// @description  青书学堂API刷课脚本，自动检测学校API地址
// @author       lidppp
// @match        *://*.qingshuxuetang.com/*
// @match        *://*.qingshuxuetang.com.cn/*
// @grant        GM_xmlhttpRequest
// @grant        GM_addStyle
// @grant        GM_setValue
// @grant        GM_getValue
// @connect      *
// @run-at       document-idle
// ==/UserScript==

(function() {
    'use strict';

    const MAX_RETRY = 3;
    const MAX_POSITION = 1000;
    const REPORT_INTERVAL = 120000;

    GM_addStyle(`
        #qs-panel{position:fixed;top:20px;right:20px;width:380px;background:linear-gradient(135deg,#667eea,#764ba2);border-radius:12px;box-shadow:0 10px 40px rgba(0,0,0,.3);z-index:99999;font-family:system-ui,sans-serif;color:#fff;overflow:hidden}
        .qs-hd{background:rgba(0,0,0,.2);padding:10px 14px;display:flex;justify-content:space-between;align-items:center;cursor:move}
        .qs-hd h3{margin:0;font-size:14px}
        .qs-hd button{background:none;border:none;color:#fff;font-size:16px;cursor:pointer}
        .qs-bd{padding:14px;max-height:500px;overflow-y:auto}
        .qs-tip{background:rgba(255,193,7,.2);border-left:3px solid #ffc107;padding:8px 10px;border-radius:0 6px 6px 0;margin-bottom:12px;font-size:11px;line-height:1.5}
        .qs-gp{margin-bottom:10px}
        .qs-gp label{display:block;margin-bottom:4px;font-size:12px;opacity:.9}
        .qs-gp input,.qs-gp select{width:100%;padding:8px 10px;border:none;border-radius:6px;background:rgba(255,255,255,.9);color:#000;font-size:13px;box-sizing:border-box}
        .qs-gp input:focus,.qs-gp select:focus{outline:none;background:rgba(255,255,255,.25)}
        .qs-gp select option{background:#333;color:#fff}
        .qs-row{display:flex;gap:8px}
        .qs-btn{flex:1;padding:8px;border:none;border-radius:6px;font-size:13px;font-weight:600;cursor:pointer}
        .qs-btn-ok{background:#4caf50;color:#fff}
        .qs-btn-no{background:#f44336;color:#fff}
        .qs-btn-2{background:rgba(255,255,255,.2);color:#fff}
        .qs-btn:disabled{opacity:.5;cursor:not-allowed}
        .qs-stat{background:rgba(0,0,0,.15);border-radius:6px;padding:10px;margin:10px 0;font-size:12px}
        .qs-task{background:rgba(0,0,0,.15);border-radius:6px;padding:8px 10px;margin:6px 0;font-size:11px}
        .qs-task-ok{border-left:3px solid #4caf50}
        .qs-task-err{border-left:3px solid #f44336}
        .qs-task-run{border-left:3px solid #2196f3}
        .qs-log{background:rgba(0,0,0,.2);border-radius:6px;padding:8px;margin-top:10px;max-height:120px;overflow-y:auto;font-family:monospace;font-size:10px;line-height:1.5}
        .qs-log div{padding:1px 0}
        .qs-t{opacity:.5;margin-right:6px}
        .qs-i{color:#81d4fa}
        .qs-ok{color:#81c784}
        .qs-err{color:#e57373}
        .qs-w{color:#ffd54f}
    `);

    function log(msg, type) {
        type = type || 'i';
        var el = document.getElementById('qs-log');
        if (el) {
            var t = new Date().toLocaleTimeString();
            el.innerHTML += '<div><span class="qs-t">[' + t + ']</span><span class="qs-' + type + '">' + msg + '</span></div>';
            el.scrollTop = el.scrollHeight;
        }
        console.log('[青书刷课] ' + msg);
    }

    function getCookie(name) {
        var m = document.cookie.match(new RegExp('(^| )' + name + '=([^;]+)'));
        return m ? m[2] : '';
    }

    function httpGet(url, cb) {
        GM_xmlhttpRequest({
            method: 'GET',
            url: url,
            headers: { 'Accept': 'application/json' },
            timeout: 15000,
            onload: function(r) {
                try { cb(null, JSON.parse(r.responseText)); }
                catch(e) { cb(null, null); }
            },
            onerror: function(e) { cb(e || new Error('error')); },
            ontimeout: function() { cb(new Error('timeout')); }
        });
    }

    function httpPost(url, data, cb) {
        var token = document.getElementById('qs-token') ? document.getElementById('qs-token').value.trim() : '';
        if (!token) token = getCookie('AccessToken') || '';

        var opts = {
            method: 'POST',
            url: url,
            headers: {
                'Accept': 'application/json',
                'Content-Type': 'application/json',
                'Cookie': 'AccessToken=' + token,
                'Referer': url,
                'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/104.0.0.0 Safari/537.36'
            },
            timeout: 30000,
            onload: function(r) {
                log('HTTP状态: ' + r.status, r.status === 200 ? 'ok' : 'err');
                if (r.status === 200) {
                    try { 
                        var json = JSON.parse(r.responseText);
                        cb(null, json); 
                    }
                    catch(e) { 
                        log('JSON解析失败', 'err');
                        cb(null, { hr: -1, message: '解析失败' }); 
                    }
                } else {
                    log('HTTP错误: ' + r.status, 'err');
                    cb(null, { hr: -1, message: 'HTTP ' + r.status });
                }
            },
            onerror: function(e) { 
                log('网络错误', 'err');
                cb(e || new Error('error')); 
            },
            ontimeout: function() { 
                log('请求超时', 'err');
                cb(new Error('timeout')); 
            }
        };

        if (data instanceof FormData) {
            opts.data = data;
            delete opts.headers['Content-Type'];
        } else {
            opts.data = JSON.stringify(data);
        }

        GM_xmlhttpRequest(opts);
    }

    // 自动检测学校API - 从当前页面URL推断
    function detectSchoolApi(cb) {
        var path = window.location.pathname;
        log('当前路径: ' + path, 'i');

        // 从路径中提取学校代码，例如 /tykj/Student/Course/CourseStudy -> /tykj/Student
        var match = path.match(/^(\/[^\/]+\/[^\/]+)\//);
        if (match && match[1]) {
            var apiPath = match[1];
            log('API路径: ' + apiPath, 'ok');

            // 构造API地址
            var apiBase = location.origin + apiPath;
            log('API地址: ' + apiBase, 'ok');

            document.getElementById('qs-api').value = apiBase;
            cb(apiBase);
        } else {
            log('无法从路径推断API地址', 'w');
            log('使用当前域名: ' + location.origin, 'i');
            document.getElementById('qs-api').value = location.origin;
            cb(location.origin);
        }
    }

    // 测试API路径
    function testApiPath(base, path, cb) {
        var url = base + path;
        log('测试: ' + url, 'i');
        
        // 使用实际参数测试
        var testParams = {
            contentId: 'test',
            contentType: 11,
            courseId: '959',
            teachPlanId: '558',
            periodId: '25',
            classId: '558'
        };
        
        httpPost(url, testParams, function(err, data) {
            if (err) {
                log('失败: ' + (err.message || '网络错误'), 'err');
                cb(false);
            } else {
                log('响应: ' + JSON.stringify(data), 'i');
                cb(true, data);
            }
        });
    }

    // 测试多个API路径
    function findWorkingApiPath(base, cb) {
        var paths = [
            '/Course/UploadStudyRecordBegin',
            '/Student/Course/UploadStudyRecordBegin',
            '/Course/CourseData',
            '/Student/Course/CourseData',
        ];
        
        var index = 0;
        
        function testNext() {
            if (index >= paths.length) {
                log('所有路径都失败', 'err');
                cb(null);
                return;
            }
            
            var path = paths[index];
            index++;
            
            testApiPath(base, path, function(success, data) {
                if (success && data && data.hr === 0) {
                    log('找到可用API: ' + base + path, 'ok');
                    cb(base + path);
                } else {
                    testNext();
                }
            });
        }
        
        testNext();
    }

    // 检测课程
    function detectCourse() {
        if (!window.location.pathname.includes('CourseStudy')) return null;

        var u = new URL(window.location.href);
        var params = {
            courseId: u.searchParams.get('courseId') || '',
            teachPlanId: u.searchParams.get('teachPlanId') || '',
            periodId: u.searchParams.get('periodId') || '',
            classId: u.searchParams.get('classId') || ''
        };

        if (!params.courseId) return null;

        var nodes = [];
        var links = document.querySelectorAll('.left_part .level-1 a[id]');
        for (var i = 0; i < links.length; i++) {
            var href = links[i].getAttribute('href');
            var m = href ? href.match(/.*\('([^']+)'.*/) : null;
            if (m && m[1]) {
                // 检查是否已学习（有mark标记表示已学习）
                var isLearned = !!links[i].querySelector('span.mark');
                nodes.push({
                    contentId: m[1],
                    contentType: 11,
                    courseId: params.courseId,
                    teachPlanId: params.teachPlanId,
                    periodId: params.periodId,
                    classId: params.teachPlanId,
                    learned: isLearned
                });
            }
        }

        // 统计未学习的课件
        var unlearned = nodes.filter(function(n) { return !n.learned; });
        log('总课件: ' + nodes.length + ', 未学习: ' + unlearned.length, 'i');

        return { params: params, nodes: unlearned, title: document.title };
    }

    // 任务类
    function Task(base, params, onUpdate) {
        this.base = base;
        this.params = params;
        this.onUpdate = onUpdate;
        this.recordId = -1;
        this.pos = 0;
        this.retry = 0;
        this.timer = null;
        this.done = false;
    }

    Task.prototype.begin = function() {
        if (this.done) return;
        this.retry++;
        if (this.retry > MAX_RETRY) {
            this.onUpdate('fail', '重试次数用尽');
            return;
        }

        var self = this;
        var url = this.base + '/Course/UploadStudyRecordBegin';
        log('POST ' + url, 'i');
        log('参数: ' + JSON.stringify(this.params), 'i');

        this.onUpdate('begin', '第' + this.retry + '次获取...');

        httpPost(url, this.params, function(err, data) {
            if (self.done) return;
            if (err) {
                log('请求失败: ' + (err.message || ''), 'err');
                setTimeout(function() { self.begin(); }, 5000);
                return;
            }

            log('响应: ' + JSON.stringify(data), 'i');

            if (data.hr === 0) {
                self.recordId = data.data;
                log('recordId=' + self.recordId, 'ok');
                self.onUpdate('ready');
                // 随机延迟60-120秒后开始上报
                var delay = Math.floor(Math.random() * 60000) + 60000;
                log('等待 ' + Math.round(delay/1000) + ' 秒后开始上报', 'i');
                setTimeout(function() { self.run(); }, delay);
            } else {
                log('失败: hr=' + data.hr + ' msg=' + (data.message || ''), 'err');
                setTimeout(function() { self.begin(); }, 5000);
            }
        });
    };

    Task.prototype.run = function() {
        if (this.done) return;
        this.onUpdate('run');
        this.report();
    };

    Task.prototype.report = function() {
        if (this.done) return;
        var self = this;

        this.pos += Math.floor(Math.random() * 41) + 60;

        if (this.pos >= MAX_POSITION) {
            log('进度完成', 'ok');
            this.end();
            return;
        }

        var url = this.base + '/Course/UploadStudyRecordContinue?_t=' + Date.now();
        log('上报: recordId=' + this.recordId + ' pos=' + this.pos, 'i');

        // 使用FormData格式，与原始代码一致
        var fd = new FormData();
        fd.append('recordId', this.recordId);
        fd.append('end', 'false');
        fd.append('position', this.pos);
        fd.append('timeOutConfirm', 'false');

        httpPost(url, fd, function(err, resp) {
            if (self.done) return;
            if (err) {
                log('上报错误: ' + (err.message || ''), 'err');
            } else {
                log('上报响应: ' + JSON.stringify(resp), 'i');
                if (resp.hr === 0) {
                    log('进度 ' + self.pos + '/' + MAX_POSITION, 'ok');
                } else {
                    log('上报失败: ' + (resp.message || 'hr=' + resp.hr), 'err');
                }
            }
            self.onUpdate('run', self.pos);
            if (!self.done) {
                // 等待2分钟后再次上报
                log('等待 ' + (REPORT_INTERVAL/1000) + ' 秒后再次上报', 'i');
                self.timer = setTimeout(function() { self.report(); }, REPORT_INTERVAL);
            }
        });
    };

    Task.prototype.end = function() {
        var self = this;
        var url = this.base + '/Course/UploadStudyRecordContinue?_t=' + Date.now();
        
        // 使用FormData格式
        var fd = new FormData();
        fd.append('recordId', this.recordId);
        fd.append('end', 'true');
        fd.append('position', this.pos);
        fd.append('timeOutConfirm', 'false');

        httpPost(url, fd, function(err, resp) {
            self.done = true;
            if (err) {
                log('结束请求失败', 'err');
            } else {
                log('结束响应: ' + JSON.stringify(resp), 'i');
            }
            self.onUpdate('done');
            log('任务完成！', 'ok');
        });
    };

    Task.prototype.stop = function() {
        this.done = true;
        clearTimeout(this.timer);
    };

    // 主应用
    function App() {
        this.course = null;
        this.tasks = [];
        this.running = false;
        this.current = 0;
        this.apiBase = '';
        this.init();
    }

    App.prototype.init = function() {
        this.createUI();
        this.autoDetect();
        // 延迟检测课程，等待页面DOM加载完成
        var self = this;
        setTimeout(function() { self.detect(); }, 1000);
        // 再次延迟检测，确保动态内容加载完成
        setTimeout(function() { self.detect(); }, 3000);
    };

    App.prototype.createUI = function() {
        var div = document.createElement('div');
        div.id = 'qs-panel';
        div.innerHTML = '<div class="qs-hd">' +
            '<h3>青书学堂刷课助手   By：王杰</h3>' +
            '<button id="qs-min">─</button>' +
            '</div>' +
            '<div class="qs-bd">' +
            '<div class="qs-tip">自动检测学校API，进入课程页面后点击"开始刷课"。</div>' +
            '<div class="qs-gp">' +
            '<label>学校 <select id="qs-school" style="display:none;width:100%;margin-top:4px"></select></label>' +
            '<input id="qs-api" placeholder="学校API地址" />' +
            '</div>' +
            '<div class="qs-gp">' +
            '<label>AccessToken</label>' +
            '<div class="qs-row"><input id="qs-token" placeholder="点击获取" /><button class="qs-btn qs-btn-2" id="qs-gettk">获取</button></div>' +
            '</div>' +
            '<div class="qs-stat" id="qs-stat">未检测到课程</div>' +
            '<div class="qs-row">' +
            '<button class="qs-btn qs-btn-ok" id="qs-start" disabled>开始刷课</button>' +
            '<button class="qs-btn qs-btn-no" id="qs-stop" disabled>停止</button>' +
            '</div>' +
            '<div class="qs-row" style="margin-top:8px">' +
            '<button class="qs-btn qs-btn-2" id="qs-refresh">重新检测</button>' +
            '<button class="qs-btn qs-btn-2" id="qs-test">测试API</button>' +
            '<button class="qs-btn qs-btn-2" id="qs-save">保存配置</button>' +
            '</div>' +
            '<div id="qs-tasks"></div>' +
            '<div class="qs-log" id="qs-log"></div>' +
            '</div>';
        document.body.appendChild(div);

        // 拖拽
        var hd = div.querySelector('.qs-hd');
        var drag = false, sx, sy, sl, st;
        hd.onmousedown = function(e) {
            drag = true; sx = e.clientX; sy = e.clientY;
            var r = div.getBoundingClientRect(); sl = r.left; st = r.top;
            div.style.position = 'fixed'; div.style.left = sl + 'px'; div.style.top = st + 'px';
        };
        document.onmousemove = function(e) { if (drag) { div.style.left = (sl + e.clientX - sx) + 'px'; div.style.top = (st + e.clientY - sy) + 'px'; } };
        document.onmouseup = function() { drag = false; };

        var self = this;
        document.getElementById('qs-min').onclick = function() { div.style.display = 'none'; };
        document.getElementById('qs-start').onclick = function() { self.start(); };
        document.getElementById('qs-stop').onclick = function() { self.stop(); };
        document.getElementById('qs-refresh').onclick = function() { self.detect(); self.autoDetect(); };
        document.getElementById('qs-gettk').onclick = function() { self.getToken(); };
        document.getElementById('qs-save').onclick = function() { self.save(); };
        document.getElementById('qs-test').onclick = function() { self.testApi(); };

        // 加载配置
        var savedApi = GM_getValue('qs-api', '');
        if (savedApi && savedApi.startsWith('http')) {
            document.getElementById('qs-api').value = savedApi;
        }
        document.getElementById('qs-token').value = GM_getValue('qs-token', '');

        log('脚本已加载', 'ok');
    };

    App.prototype.autoDetect = function() {
        var self = this;
        detectSchoolApi(function(url) {
            self.apiBase = url;
            document.getElementById('qs-api').value = url;
            GM_setValue('qs-api', url);
        });
    };

    App.prototype.detect = function() {
        this.course = detectCourse();
        var stat = document.getElementById('qs-stat');
        var btn = document.getElementById('qs-start');

        if (this.course) {
            var total = this.course.nodes.length;
            stat.innerHTML = '<span class="qs-ok">✓ ' + this.course.title + '</span><br>待学习课件: ' + total + ' 个';
            btn.disabled = total === 0;
            if (total > 0) {
                log('检测到 ' + total + ' 个待学习课件', 'ok');
            } else {
                log('所有课件已学习完成！', 'ok');
            }
        } else {
            stat.innerHTML = '<span class="qs-err">✗ 未检测到课程页面</span>';
            btn.disabled = true;
        }
    };

    App.prototype.getToken = function() {
        var token = getCookie('AccessToken');
        if (token) {
            document.getElementById('qs-token').value = token;
            log('已获取Token', 'ok');
        } else {
            log('Cookie中无Token', 'w');
            log('F12执行: document.cookie', 'i');
        }
    };

    App.prototype.save = function() {
        var api = document.getElementById('qs-api').value.trim().replace(/\/+$/, '');
        document.getElementById('qs-api').value = api;
        GM_setValue('qs-api', api);
        GM_setValue('qs-token', document.getElementById('qs-token').value.trim());
        log('配置已保存', 'ok');
    };

    App.prototype.start = function() {
        if (!this.course || !this.course.nodes || !this.course.nodes.length) return;

        var base = document.getElementById('qs-api').value.trim().replace(/\/+$/, '');
        if (!base) { log('请填写API地址', 'err'); return; }

        this.save();
        this.running = true;
        this.current = 0;
        this.tasks = [];

        document.getElementById('qs-start').disabled = true;
        document.getElementById('qs-stop').disabled = false;
        document.getElementById('qs-tasks').innerHTML = '';

        log('开始刷课，共 ' + this.course.nodes.length + ' 个任务', 'ok');
        this.processNext(base);
    };

    App.prototype.processNext = function(base) {
        if (!this.running || this.current >= this.course.nodes.length) {
            if (this.running) {
                log('所有任务完成！', 'ok');
                this.running = false;
                document.getElementById('qs-start').disabled = false;
                document.getElementById('qs-stop').disabled = true;
                // 所有任务完成后刷新页面
                log('3秒后刷新页面...', 'i');
                setTimeout(function() { location.reload(); }, 3000);
            }
            return;
        }

        var node = this.course.nodes[this.current];
        var idx = this.current;
        var self = this;

        var div = document.createElement('div');
        div.className = 'qs-task qs-task-run';
        div.id = 'qs-t-' + idx;
        div.textContent = '任务' + (idx + 1) + ': ' + node.contentId;
        document.getElementById('qs-tasks').appendChild(div);

        var task = new Task(base, node, function(status, pos) {
            var el = document.getElementById('qs-t-' + idx);
            if (!el) return;

            if (status === 'done' || status === 'fail') {
                el.className = 'qs-task ' + (status === 'done' ? 'qs-task-ok' : 'qs-task-err');
                el.textContent = '任务' + (idx + 1) + ': ' + node.contentId + ' [' + (status === 'done' ? '完成' : '失败') + ']';
                self.current++;
                // 每个任务完成后刷新页面，然后继续下一个
                log('任务完成，刷新页面...', 'i');
                setTimeout(function() { location.reload(); }, 3000);
            } else {
                el.textContent = '任务' + (idx + 1) + ': ' + node.contentId + ' [' + status + (pos !== undefined ? ' ' + pos + '/1000' : '') + ']';
            }
        });

        this.tasks.push(task);
        task.begin();
    };

    App.prototype.stop = function() {
        this.running = false;
        this.tasks.forEach(function(t) { t.stop(); });
        document.getElementById('qs-start').disabled = false;
        document.getElementById('qs-stop').disabled = true;
        log('已停止', 'w');
    };

    App.prototype.testApi = function() {
        var base = document.getElementById('qs-api').value.trim().replace(/\/+$/, '');
        if (!base) {
            log('请填写API地址', 'err');
            return;
        }
        
        log('开始测试API路径...', 'i');
        findWorkingApiPath(base, function(url) {
            if (url) {
                log('找到可用API: ' + url, 'ok');
            } else {
                log('未找到可用API', 'err');
            }
        });
    };

    // 启动
    if (document.readyState === 'complete') {
        new App();
    } else {
        window.addEventListener('load', function() { new App(); });
    }
})();