// ==UserScript==
// @name         华为人才在线课程助手 (Huawei Talent Helper) - Visual
// @namespace    http://tampermonkey.net/
// @version      0.81
// @description  【可视化回归版】恢复 GUI 界面，支持倍速调节与日志下载，采用 Shadow DOM 隔离检测。
// @author       Antigravity
// @match        *://e.huawei.com/cn/talent/*
// @match        *://talent.shixizhi.huawei.com/*
// @grant        none
// @run-at       document-end
// ==/UserScript==

(function() {
    'use strict';

    const CONFIG = {
        autoNext: true,
        playbackSpeed: 1.0,
        minDelay: 5000,
        maxDelay: 15000
    };

    // 增强型日志系统
    const logger = {
        buffer: JSON.parse(localStorage.getItem('huawei_helper_logs') || "[]"),
        log: function(msg, type = "INFO") {
            const time = new Date().toLocaleTimeString();
            const logMsg = `[${time}] [${type}] ${msg}`;
            this.buffer.push(logMsg);
            
            // 持久化到 localStorage (保留最近 500 条)
            if (this.buffer.length > 500) this.buffer.shift();
            localStorage.setItem('huawei_helper_logs', JSON.stringify(this.buffer));

            if (type === "SUCCESS") console.log(`%c${logMsg}`, "color: #28a745; font-weight: bold;");
            else if (type === "WARN") console.warn(logMsg);
            else console.log(logMsg);
            
            updateUIRunStatus(logMsg);
        },
        download: function() {
            if (this.buffer.length === 0) {
                alert("当前没有可导出的日志。");
                return;
            }
            const blob = new Blob([this.buffer.join("\n")], { type: "text/plain" });
            const url = URL.createObjectURL(blob);
            const a = document.createElement("a");
            a.href = url;
            a.download = `huawei_logs_${new Date().getTime()}.txt`;
            a.click();
            URL.revokeObjectURL(url);
            this.log("日志已成功导出到本地。", "SUCCESS");
        },
        clear: function() {
            this.buffer = [];
            localStorage.removeItem('huawei_helper_logs');
            this.log("日志已清空。");
        }
    };

    // UI 相关逻辑 (采用 Shadow DOM 提高安全性)
    let uiRoot = null;
    function createUI() {
        if (document.getElementById('huawei-helper-host')) return;

        const host = document.createElement('div');
        host.id = 'huawei-helper-host';
        host.style = "position: fixed; top: 50px; right: 20px; z-index: 2147483647;";
        document.body.appendChild(host);

        uiRoot = host.attachShadow({ mode: 'closed' }); // 使用 closed 模式进一步隐藏

        const panel = document.createElement('div');
        panel.style = `
            background: #fff;
            border: 2px solid #ee0000;
            padding: 12px;
            border-radius: 10px;
            box-shadow: 0 8px 24px rgba(0,0,0,0.2);
            font-family: system-ui, -apple-system, sans-serif;
            font-size: 13px;
            width: 200px;
            color: #333;
        `;

        panel.innerHTML = `
            <div style="font-weight: bold; color: #ee0000; border-bottom: 1px solid #eee; margin-bottom: 10px; padding-bottom: 5px; display: flex; justify-content: space-between;">
                <span>华为助手 v0.8</span>
                <span id="minimize-btn" style="cursor: pointer; font-family: monospace;">[_]</span>
            </div>
            <div id="controls">
                <div style="margin-bottom: 8px;">
                    <label style="cursor: pointer; display: flex; align-items: center;">
                        <input type="checkbox" id="auto-next-toggle" ${CONFIG.autoNext ? 'checked' : ''} style="margin-right: 8px;"> 自动连播
                    </label>
                </div>
                <div style="margin-bottom: 12px;">
                    倍速: <input type="number" id="speed-input" value="${CONFIG.playbackSpeed}" step="0.5" min="0.5" max="4.0" style="width: 50px; padding: 2px 5px; border: 1px solid #ddd; border-radius: 4px;"> 
                    <span style="font-size: 11px; color: #999;">(安全建议 1.0)</span>
                </div>
                <button id="dl-log-btn" style="width: 100%; padding: 6px; background: #fdfdfd; border: 1px solid #ddd; border-radius: 4px; cursor: pointer; margin-bottom: 8px; font-size: 12px;">导出日志 (Alt+Shift+L)</button>
                <div id="ui-current-status" style="font-size: 11px; color: #666; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; background: #f9f9f9; padding: 4px; border-radius: 2px;">就绪...</div>
            </div>
        `;

        uiRoot.appendChild(panel);

        // 事件绑定
        uiRoot.getElementById('auto-next-toggle').addEventListener('change', (e) => {
            CONFIG.autoNext = e.target.checked;
            logger.log("自动连播已" + (CONFIG.autoNext ? "开启" : "关闭"));
        });

        uiRoot.getElementById('speed-input').addEventListener('input', (e) => {
            CONFIG.playbackSpeed = parseFloat(e.target.value) || 1.0;
            logger.log(`期望倍速已设为: ${CONFIG.playbackSpeed}x`);
        });

        uiRoot.getElementById('dl-log-btn').addEventListener('click', () => logger.download());

        uiRoot.getElementById('minimize-btn').addEventListener('click', function() {
            const ctrl = uiRoot.getElementById('controls');
            if (ctrl.style.display === 'none') {
                ctrl.style.display = 'block';
                this.innerText = '[_]';
            } else {
                ctrl.style.display = 'none';
                this.innerText = '[+]';
            }
        });
    }

    function updateUIRunStatus(msg) {
        if (!uiRoot) return;
        const el = uiRoot.getElementById('ui-current-status');
        if (el) el.innerText = msg.replace(/\[.*?\] /g, "");
    }

    // 快捷键
    window.addEventListener('keydown', (e) => {
        if (e.altKey && e.shiftKey && e.code === 'KeyL') {
            e.preventDefault();
            logger.download();
        }
    });

    function runLoop() {
        const videos = document.querySelectorAll('video');
        
        videos.forEach(video => {
            if (video.playbackRate !== CONFIG.playbackSpeed) {
                video.playbackRate = CONFIG.playbackSpeed;
            }
            if (video.paused && !video.ended && video.readyState >= 2) {
                video.play().catch(() => {});
            }
            if (video.ended && CONFIG.autoNext && !video.dataset.v8Jumped) {
                video.dataset.v8Jumped = "true";
                const delay = Math.floor(Math.random() * (CONFIG.maxDelay - CONFIG.minDelay) + CONFIG.minDelay);
                logger.log(`视频完毕，${Math.round(delay/1000)}s 后跳转...`, "SUCCESS");
                setTimeout(doJump, delay);
            }
        });

        setTimeout(runLoop, 3000);
    }

    function doJump() {
        const sel = ['.course-next-item', '.kltCourse-btn-next', '.vjs-next-button', '.course-side-catalog-item.active + li'];
        let ok = false;
        for (let s of sel) {
            let b = document.querySelector(s);
            if (b && b.offsetParent) { b.click(); ok = true; break; }
        }
        if (!ok) {
            for (let el of document.querySelectorAll('span, button, div')) {
                if (el.innerText.includes('下一讲') && el.offsetParent) { el.click(); ok = true; break; }
            }
        }
        if (ok) logger.log("跳转成功", "SUCCESS");
    }

    // 初始化
    setInterval(createUI, 3000);
    setTimeout(runLoop, 5000);

})();