// ==UserScript==
// @name         江西水利职业学院-成教-柠檬文才-全自动刷课助手（site.wencaischool.net）
// @version      1.0.0
// @description   wencaischool.net 全自动刷视频+自动切换章节，支持倍速/静音
// @author       晓晓
// @match        *://learning.wencaischool.net/*
// @match        *://site.wencaischool.net/*
// @match        *://*.wencaischool.net/*
// @grant        GM_getValue
// @grant        GM_setValue
// ==/UserScript==

(function () {
    'use strict';

    if (window.__jxslHelper) {
        console.log('已有脚本在运行，跳过');
        return;
    }

    var STATUS_KEY = 'jxsl_running';
    function getRunning() { return GM_getValue(STATUS_KEY, false); }
    function setRunning(v) { GM_setValue(STATUS_KEY, v); }

    var config = {
        speed: parseFloat(localStorage.getItem('jxsl_speed')) || 1.0,
        autoPlay: true,
        autoNext: true,
        debug: true
    };

    function log(msg, type) {
        type = type || 'info';
        if (!config.debug && type === 'info') return;
        var prefix = { error: '❌', success: '✅', warning: '⚠️' }[type] || '🔍';
        console.log(prefix, msg);
    }

    function $1(s) { return document.querySelector(s); }

    // ==================== UI面板 ====================
    function createPanel() {
        var existing = $1('#jxsl-panel');
        if (existing) existing.remove();
        var isRunning = getRunning();

        var el = document.createElement('div');
        el.id = 'jxsl-panel';
        el.innerHTML =
            '<div id="jxsl-drag" style="background:linear-gradient(135deg,#1a1a2e,#16213e);color:#fff;padding:14px;border-radius:12px;position:fixed;top:20px;right:20px;z-index:99999999;min-width:280px;box-shadow:0 8px 32px rgba(0,0,0,0.5);font-family:Microsoft YaHei,Arial;border:1px solid rgba(255,255,255,0.08);cursor:move;">' +

            '<div style="display:flex;align-items:center;gap:8px;margin-bottom:10px;padding-bottom:8px;border-bottom:1px solid rgba(255,255,255,0.1);">' +
            '<span style="font-size:20px;">🎓</span>' +
            '<div style="font-weight:700;font-size:14px;color:#fff;">江西水利职业学院刷课助手</div>' +
            '<div id="jxsl-badge" style="margin-left:auto;background:' + (isRunning ? '#10b981' : '#6b7280') + ';color:#fff;padding:2px 10px;border-radius:20px;font-size:11px;font-weight:600;">' + (isRunning ? '● 运行中' : '○ 已暂停') + '</div>' +
            '</div>' +

            '<div style="font-size:12px;color:#aaa;margin-bottom:6px;">播放速度 (最高16x)：</div>' +
            '<select id="jxsl-speed" style="width:100%;padding:6px 8px;background:rgba(255,255,255,0.08);color:#fff;border:1px solid rgba(255,255,255,0.15);border-radius:6px;font-size:13px;margin-bottom:8px;cursor:pointer;">' +
            '<option value="1">1x 正常</option>' +
            '<option value="1.5">1.5x 快速</option>' +
            '<option value="2">2x 倍速</option>' +
            '<option value="3">3x 极速</option>' +
            '<option value="4">4x 狂飙</option>' +
            '<option value="6">6x</option>' +
            '<option value="8">8x</option>' +
            '<option value="12">12x</option>' +
            '<option value="16">16x 极限</option>' +
            '</select>' +

            '<div style="margin-bottom:8px;">' +
            '<label style="display:flex;align-items:center;gap:8px;cursor:pointer;margin-bottom:4px;">' +
            '<input type="checkbox" id="jxsl-autoplay" ' + (config.autoPlay ? 'checked' : '') + ' style="width:16px;height:16px;cursor:pointer;">' +
            '<span style="font-size:13px;">自动播放</span>' +
            '</label>' +
            '<label style="display:flex;align-items:center;gap:8px;cursor:pointer;">' +
            '<input type="checkbox" id="jxsl-autonext" ' + (config.autoNext ? 'checked' : '') + ' style="width:16px;height:16px;cursor:pointer;">' +
            '<span style="font-size:13px;">自动切换下一章</span>' +
            '</label>' +
            '</div>' +

            '<div id="jxsl-status" style="font-size:13px;color:#4ade80;padding:8px;background:rgba(0,0,0,0.3);border-radius:6px;margin-bottom:4px;">运行中</div>' +
            '<div id="jxsl-info" style="font-size:11px;color:#aaa;padding:2px 8px;min-height:16px;"></div>' +
            '<div id="jxsl-chapter" style="font-size:11px;color:#ff9800;padding:2px 8px;min-height:16px;word-break:break-all;"></div>' +

            '<button id="jxsl-btn-toggle" style="width:100%;margin-top:10px;background:#1890ff;color:#fff;border:none;padding:9px 12px;border-radius:6px;cursor:pointer;font-weight:700;font-size:13px;">▶ 开始刷课</button>' +

            '<div style="margin-top:10px;padding:6px 10px;background:rgba(24,144,255,0.1);border:1px solid rgba(24,144,255,0.3);border-radius:6px;text-align:center;">' +
            '<span style="font-size:13px;">💬</span> ' +
            '<span style="font-size:14px;font-weight:700;color:#60a5fa;">wkds995</span>' +
            '<span style="font-size:10px;color:#94a3b8;"> 客服微信</span>' +
            '</div>' +
            '</div>';

        document.body.appendChild(el);

        // 拖拽
        var dragEl = $1('#jxsl-drag');
        var isDragging = false, startX, startY, origX, origY;
        dragEl.addEventListener('mousedown', function (e) {
            isDragging = true;
            startX = e.clientX; startY = e.clientY;
            origX = dragEl.offsetLeft; origY = dragEl.offsetTop;
        });
        document.addEventListener('mousemove', function (e) {
            if (!isDragging) return;
            var dx = e.clientX - startX, dy = e.clientY - startY;
            var newX = Math.max(0, Math.min(origX + dx, window.innerWidth - dragEl.offsetWidth));
            var newY = Math.max(0, Math.min(origY + dy, window.innerHeight - dragEl.offsetHeight));
            dragEl.style.left = newX + 'px';
            dragEl.style.top = newY + 'px';
            dragEl.style.right = 'auto';
        });
        document.addEventListener('mouseup', function () { isDragging = false; });

        // 速度选择
        $1('#jxsl-speed').value = config.speed;
        $1('#jxsl-speed').addEventListener('change', function () {
            config.speed = parseFloat(this.value);
            localStorage.setItem('jxsl_speed', config.speed);
            applySpeed();
            updateStatus('\u901f\u5ea6: ' + config.speed + 'x', 'success');
        });

        $1('#jxsl-autoplay').addEventListener('change', function () {
            config.autoPlay = this.checked;
        });
        $1('#jxsl-autonext').addEventListener('change', function () {
            config.autoNext = this.checked;
        });

        // 启动/暂停按钮
        $1('#jxsl-btn-toggle').addEventListener('click', function () {
            if (getRunning()) {
                setRunning(false);
                var badge = $1('#jxsl-badge');
                if (badge) { badge.textContent = '\u25cb \u5df2\u6697\u505c'; badge.style.background = '#6b7280'; }
                this.textContent = '\u25b6 \u5f00\u59cb\u5237\u8bfe';
                this.style.background = '#1890ff';
                updateStatus('\u5df2\u6697\u505c', 'warning');
            } else {
                setRunning(true);
                var badge = $1('#jxsl-badge');
                if (badge) { badge.textContent = '\u25cf \u8fd0\u884c\u4e2d'; badge.style.background = '#10b981'; }
                this.textContent = '\u23f8 \u6682\u505c\u5237\u8bfe';
                this.style.background = '#ef4444';
                updateStatus('\u6b63\u5728\u5237\u8bfe...', 'success');
            }
        });
    }

    function updateStatus(text, type) {
        var el = $1('#jxsl-status');
        if (!el) return;
        el.textContent = text;
        var colors = { success: '#4ade80', warning: '#fbbf24', error: '#ef4444', info: '#60a5fa' };
        el.style.color = colors[type] || '#4ade80';
        log(text, type);
    }
    function updateInfo(text) { var el = $1('#jxsl-info'); if (el) el.textContent = text; }
    function updateChapter(text) { var el = $1('#jxsl-chapter'); if (el) el.textContent = text; }

    // ==================== 视频检测 ====================
    function findVideo() {
        var frames = document.querySelectorAll('iframe');
        for (var i = 0; i < frames.length; i++) {
            try {
                var v = frames[i].contentDocument.querySelector('video');
                if (v) { log('\u5728iframe[' + i + ']\u4e2d\u627e\u5230\u89c6\u9891', 'success'); return v; }
            } catch (e) {}
        }
        var videos = document.querySelectorAll('video');
        if (videos.length > 0) {
            for (var j = 0; j < videos.length; j++) {
                if (videos[j].offsetParent !== null || videos[j].style.display !== 'none') return videos[j];
            }
            return videos[0];
        }
        return null;
    }

    function applySpeed() {
        var v = findVideo();
        if (v) v.playbackRate = config.speed;
    }

    // ==================== 章节检测 ====================
    function findChapters() {
        var allChapters = [];
        var frames = document.querySelectorAll('iframe');

        for (var fi = 0; fi < frames.length; fi++) {
            try {
                var doc = frames[fi].contentDocument;
                var sections = doc.querySelectorAll('.childSection');
                log('iframe[' + fi + '] \u627e\u5230 ' + sections.length + ' \u4e2a .childSection', 'info');

                for (var k = 0; k < sections.length; k++) {
                    var sec = sections[k];
                    var style = window.getComputedStyle(sec);
                    if (style.display === 'none' || style.visibility === 'hidden') continue;
                    var text = (sec.textContent || '').trim();
                    if (!text || text.length < 5) continue;
                    var numMatch = text.match(/(\d+\.\d+\.\d+)/);
                    if (!numMatch) continue;

                    var isActive = false;
                    if (location.href.includes(numMatch[1])) isActive = true;

                    var children = sec.querySelectorAll('*');
                    for (var c = 0; c < children.length; c++) {
                        var bg = (window.getComputedStyle(children[c]).backgroundColor || '').toLowerCase();
                        if (bg.includes('blue') || bg.includes('33, 150, 243') || bg.includes('30, 144')) { isActive = true; break; }
                    }

                    var cn = (sec.className || '').toLowerCase();
                    if (cn.includes('active') || cn.includes('current') || cn.includes('playing')) isActive = true;

                    allChapters.push({ element: sec, text: text.substring(0, 80), num: numMatch[1], isActive: isActive });
                }
            } catch (e) { log('iframe[' + fi + '] \u8bbf\u95ee\u5931\u8d25: ' + e.message, 'warning'); }
        }
        return allChapters;
    }

    function findNextChapter() {
        var chapters = findChapters();
        if (chapters.length === 0) { updateStatus('\u672a\u627e\u5230\u7ae0\u8282', 'error'); return null; }

        var currentIndex = -1;
        for (var i = 0; i < chapters.length; i++) {
            if (chapters[i].isActive) { currentIndex = i; break; }
        }

        if (currentIndex === -1) { updateStatus('\u672a\u8bc6\u522b\u5f53\u524d\u7ae0\u8282', 'warning'); return null; }
        if (currentIndex >= chapters.length - 1) { updateStatus('\u5df2\u5b8c\u6210\u6240\u6709\u7ae0\u8282', 'success'); return null; }

        var next = chapters[currentIndex + 1];
        updateChapter('\u5f53\u524d: ' + chapters[currentIndex].text.substring(0, 25) + '\n\u4e0b\u4e00\u7ae0: ' + next.text.substring(0, 25));
        return next.element;
    }

    // ==================== 主循环 ====================
    var counter = 0;
    var videoFinished = false;
    var switchCooldown = false;
    var retryCount = 0;
    var lastVideoSrc = '';

    function mainLoop() {
        counter++;
        if (!getRunning()) {
            if (counter % 120 === 0) updateStatus('\u5df2\u6697\u505c', 'warning');
            return;
        }

        var v = findVideo();
        if (!v) {
            if (counter % 60 === 0) { updateStatus('\u672a\u68c0\u6d4b\u5230\u89c6\u9891', 'warning'); updateInfo('\u8bf7\u8fdb\u5165\u89c6\u9891\u64ad\u653e\u9875\u9762'); }
            return;
        }

        if (v.src && v.src !== lastVideoSrc) {
            log('\u89c6\u9891\u5207\u6362: ' + (lastVideoSrc ? '\u65b0\u89c6\u9891' : '\u9996\u6b21\u68c0\u6d4b'), 'info');
            lastVideoSrc = v.src;
            videoFinished = false;
            retryCount = 0;
        }

        if (Math.abs(v.playbackRate - config.speed) > 0.01) applySpeed();

        if (config.autoPlay && v.paused && !v.ended && v.readyState >= 2) {
            v.play().catch(function (e) { log('\u64ad\u653e\u5931\u8d25: ' + e.message, 'error'); });
            updateStatus('\u6b63\u5728\u64ad\u653e', 'success');
            videoFinished = false;
        }

        if (v.duration && !isNaN(v.duration)) {
            var cur = Math.floor(v.currentTime);
            var total = Math.floor(v.duration);
            var pct = Math.floor((cur / total) * 100);
            var cm = Math.floor(cur / 60), cs = cur % 60, tm = Math.floor(total / 60), ts = total % 60;
            updateInfo('\u2705 ' + pct + '% | ' + cm + ':' + String(cs).padStart(2, '0') + ' / ' + tm + ':' + String(ts).padStart(2, '0') + ' | ' + config.speed + 'x');

            if (cur >= total - 2 && !videoFinished && config.autoNext && !switchCooldown) {
                videoFinished = true;
                updateStatus('\u89c6\u9891\u5373\u5c06\u5b8c\u6210\uff0c\u51c6\u5907\u5207\u6362...', 'warning');
                trySwitchNextChapter();
            }
        }
    }

    function trySwitchNextChapter() {
        var next = findNextChapter();
        if (next) {
            updateStatus('\u70b9\u51fb\u4e0b\u4e00\u7ae0', 'success');
            switchCooldown = true;
            retryCount = 0;
            try { next.click(); var evt = new MouseEvent('click', { bubbles: true, cancelable: true, view: window }); next.dispatchEvent(evt); } catch (e) {}
            setTimeout(function () { switchCooldown = false; }, 15000);
        } else {
            if (retryCount < 5) {
                retryCount++;
                log('\u7b2c ' + retryCount + ' \u6b21\u91cd\u8bd5...', 'warning');
                setTimeout(function () { if (videoFinished) trySwitchNextChapter(); }, 2000);
            } else {
                updateStatus('\u672a\u627e\u5230\u4e0b\u4e00\u7ae0', 'error');
                retryCount = 0;
            }
        }
    }

    function init() {
        log('\u521d\u59cb\u5316...', 'info');
        createPanel();
        setInterval(mainLoop, 500);
        updateStatus('\u811a\u672c\u5df2\u542f\u52a8', 'success');
    }

    if (document.readyState === 'complete') { init(); }
    else { window.addEventListener('load', init); }

    window.__jxslHelper = { config: config, version: '1.0.0' };

})();