// ==UserScript==
// @name         华为人才在线课程助手 (Huawei Talent Helper) - Log+Safe
// @namespace    http://tampermonkey.net/
// @version      0.7
// @description  【日志增强版】支持 Alt+Shift+L 导出运行日志，默认 1.0x 安全倍速及随机延迟跳转。
// @author       Antigravity
// @match        *://e.huawei.com/cn/talent/*
// @match        *://talent.shixizhi.huawei.com/*
// @grant        none
// @run-at       document-start
// ==/UserScript==

(function() {
    'use strict';

    /**
     * v0.7 日志增强版更新日志：
     * 1. 日志本地保存：按 Alt + Shift + L 可将当前运行日志下载为 txt 文件。
     * 2. 依然保持 v0.6 的“极稳模式”：1.0x 倍速 + 随机延迟，防止系统报错。
     */

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

    // 日志系统
    const logger = {
        buffer: [],
        log: function(msg, type = "INFO") {
            const time = new Date().toLocaleTimeString();
            const logMsg = `[${time}] [${type}] ${msg}`;
            this.buffer.push(logMsg);
            
            // 同时也输出到控制台
            if (type === "SUCCESS") {
                console.log(`%c${logMsg}`, "color: #28a745; font-weight: bold;");
            } else if (type === "WARN") {
                console.warn(logMsg);
            } else {
                console.log(logMsg);
            }

            // 保持缓冲区在合理范围
            if (this.buffer.length > 1000) this.buffer.shift();
        },
        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("日志已成功导出并触发下载。", "SUCCESS");
        }
    };

    logger.log("华为助手 v0.7 已启动。按 Alt + Shift + L 可下载日志。");

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

    function safeRun() {
        const videos = document.querySelectorAll('video');
        
        if (videos.length === 0) {
            // 仅在控制台静默显示巡检，不存入 buffer 减少干扰
            // console.debug("[HuaweiSafe] 正在巡检：未发现视频元素...");
        }

        videos.forEach((video, index) => {
            const status = video.paused ? "已暂停" : "播放中";
            const progress = ((video.currentTime / video.duration) * 100).toFixed(1);
            
            // 周期性记录进度
            if (Math.floor(video.currentTime) % 30 === 0) {
                logger.log(`视频[${index}] 状态: ${status}, 进度: ${progress}%, 倍速: ${video.playbackRate}x`);
            }

            // 确保播放速度正常
            if (video.playbackRate !== CONFIG.playbackSpeed) {
                logger.log(`修正倍速: ${video.playbackRate}x -> ${CONFIG.playbackSpeed}x`, "WARN");
                video.playbackRate = CONFIG.playbackSpeed;
            }

            // 自动播放
            if (video.paused && !video.ended && video.readyState >= 2) {
                logger.log("检测到暂停，尝试恢复播放...");
                video.play().catch(() => {});
            }

            // 自动连播 (带随机延迟)
            if (video.ended && CONFIG.autoNext && !video.dataset.safeJumped) {
                video.dataset.safeJumped = "true";
                const delay = Math.floor(Math.random() * (CONFIG.maxDelay - CONFIG.minDelay) + CONFIG.minDelay);
                logger.log(`视频播放完毕！将在 ${Math.round(delay/1000)} 秒后触发自动跳转...`, "SUCCESS");
                
                setTimeout(doJump, delay);
            }
        });

        setTimeout(safeRun, 5000 + Math.random() * 2000);
    }

    function doJump() {
        const selectors = [
            '.course-next-item', 
            '.kltCourse-btn-next', 
            '.vjs-next-button',
            'div.next-chapter-btn'
        ];

        let clicked = false;
        for (const selector of selectors) {
            const btn = document.querySelector(selector);
            if (btn && btn.offsetParent !== null) {
                btn.click();
                clicked = true;
                break;
            }
        }

        if (!clicked) {
            const elements = document.querySelectorAll('span, button, div');
            for (const el of elements) {
                if ((el.innerText.includes('下一讲') || el.innerText.includes('下一节')) && el.offsetParent !== null) {
                    el.click();
                    clicked = true;
                    break;
                }
            }
        }

        if (clicked) {
            logger.log("已点击跳转按钮。", "SUCCESS");
        } else {
            logger.log("未找到跳转按钮，请手动操作。", "WARN");
        }
    }

    // 5秒后启动主逻辑
    setTimeout(safeRun, 5000);

})();