// ==UserScript==
// @name         昊誉网课全自动学习(全功能整合版)
// @namespace    http://tampermonkey.net/
// @version      45.0
// @description  面板显示、自动播放、弹窗关闭、达标跳转、快退补偿、暂停恢复、精准选课
// @author       助手
// @match        https://train.haoyuinfo.com/*/study/course/*
// @match        https://train.haoyuinfo.com/study/course/*
// @match        https://train.haoyuinfo.com/userCenter*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    function log(msg) {
        console.log('[昊誉助手] ' + msg);
    }

    // ========== 学时面板 ==========
    let studyPanel = null;
    let hasReachedRequired = false;
    let lastRequired = 0;
    let lastViewed = 0;

    function createStudyPanel() {
        if (studyPanel) return;
        studyPanel = document.createElement('div');
        studyPanel.id = 'haoyu-study-panel';
        studyPanel.innerHTML = `
            <div style="position:fixed;top:10px;right:10px;background:rgba(0,0,0,0.85);color:#fff;padding:10px 16px;border-radius:8px;font-size:14px;z-index:999999;box-shadow:0 4px 12px rgba(0,0,0,0.4);font-family:Arial,sans-serif;min-width:200px;">
                <div style="font-weight:bold;margin-bottom:4px;">📊 学习进度</div>
                <div>要求观看: <strong id="haoyu-required" style="color:#ff9800;">--</strong> 分钟</div>
                <div>已观看: <strong id="haoyu-viewed" style="color:#4caf50;">--</strong> 分钟</div>
                <div id="haoyu-status" style="margin-top:4px;font-size:12px;"></div>
            </div>
        `;
        document.body.appendChild(studyPanel);
    }

    function getStudyData() {
        const viewSpan = document.getElementById('viewTimeTxt');
        let viewedText = '--';
        let requiredText = '--';
        let requiredNum = 0;
        let viewedNum = 0;
        if (viewSpan) {
            viewedText = viewSpan.textContent.trim();
            viewedNum = parseInt(viewedText) || 0;
            const timeParagraph = viewSpan.closest('p');
            if (timeParagraph) {
                const spans = timeParagraph.querySelectorAll('span');
                if (spans.length > 0) {
                    requiredText = spans[0].textContent.trim();
                    requiredNum = parseInt(requiredText) || 0;
                }
            }
        }
        lastRequired = requiredNum;
        lastViewed = viewedNum;
        return { viewedText, requiredText, viewedNum: viewedNum, requiredNum: requiredNum };
    }

    function updateStudyPanel() {
        if (!document.getElementById('haoyu-study-panel')) {
            studyPanel = null;
            createStudyPanel();
        }
        const data = getStudyData();
        const reqElem = document.getElementById('haoyu-required');
        const viewElem = document.getElementById('haoyu-viewed');
        const statusElem = document.getElementById('haoyu-status');
        if (reqElem) reqElem.textContent = data.requiredText;
        if (viewElem) viewElem.textContent = data.viewedText;
        if (statusElem) {
            if (data.requiredNum > 0 && data.viewedNum >= data.requiredNum) {
                statusElem.textContent = '✅ 学时已达标';
                statusElem.style.color = '#4caf50';
            } else if (data.requiredNum > 0 && data.viewedNum < data.requiredNum) {
                statusElem.textContent = '⏳ 还需观看 ' + (data.requiredNum - data.viewedNum) + ' 分钟';
                statusElem.style.color = '#ff9800';
            } else {
                statusElem.textContent = '📹 正在播放...';
                statusElem.style.color = '#2196f3';
            }
        }
    }

    function checkCompletedLabel() {
        const completedIns = document.querySelector('ins.tip');
        return completedIns && completedIns.textContent.trim() === '已完成' && completedIns.offsetParent;
    }

    function checkNumberReached() {
        const data = getStudyData();
        return data.requiredNum > 0 && data.viewedNum >= data.requiredNum;
    }

    // ========== 用户中心 ==========
    function findUnfinishedCourse() {
        const allIns = document.querySelectorAll('ins');
        for (let ins of allIns) {
            if (ins.textContent.trim() !== '去学习' || !ins.offsetParent) continue;
            const li = ins.closest('li');
            if (!li) continue;
            if (li.querySelector('img[src*="ico-sxtpass"]')) continue;
            log('找到未完成课程');
            return ins.closest('a') || ins;
        }
        return null;
    }

    function autoEnterCourse() {
        const entry = findUnfinishedCourse();
        if (entry) entry.click();
    }

    // ========== 课程页面：弹窗处理 ==========
    function closePopup() {
        // 继续学习弹窗
        const continueBtn = document.querySelector('button.mylayer-btn.mylayer-btn3.type0');
        if (continueBtn && continueBtn.offsetParent && continueBtn.textContent.includes('继续学习')) {
            log('点击继续学习');
            continueBtn.click();
            return true;
        }
        // 完成弹窗确定按钮
        const confirmBtn = document.querySelector('button.mylayer-btn.type1');
        if (confirmBtn && confirmBtn.offsetParent && !/观看|学时|分钟|已观看/i.test(confirmBtn.textContent.trim())) {
            log('关闭完成弹窗');
            confirmBtn.click();
            return true;
        }
        // 关闭图标
        const closeIcon = document.querySelector('.mylayer-close, .mylayer-close-btn, [class*="close"]');
        if (closeIcon && closeIcon.offsetParent) {
            closeIcon.click();
            return true;
        }
        // 通用文字按钮
        const all = document.querySelectorAll('button, a, span, div');
        for (let el of all) {
            if (el.offsetParent && /确定|知道了|关闭|ok|close|完成/i.test(el.textContent.trim()) && !/观看|学时|分钟|已观看/i.test(el.textContent.trim())) {
                el.click();
                return true;
            }
        }
        return false;
    }

    // ========== 视频处理 ==========
    function getActiveVideo() {
        const videos = document.querySelectorAll('video');
        for (let video of videos) {
            if (video.offsetParent && video.offsetWidth > 0 && video.offsetHeight > 0) return video;
        }
        const iframes = document.querySelectorAll('iframe');
        for (let iframe of iframes) {
            try {
                const doc = iframe.contentDocument || iframe.contentWindow.document;
                const video = doc.querySelector('video');
                if (video && video.offsetWidth > 0 && video.offsetHeight > 0) return video;
            } catch(e) {}
        }
        return document.querySelector('video');
    }

    function forceAutoPlay(video, attempt = 0) {
        if (!video || !video.paused || video.ended || attempt > 5 || hasReachedRequired) return;
        video.play().catch(() => {
            if (attempt === 2) video.muted = true;
            setTimeout(() => forceAutoPlay(video, attempt + 1), 1500);
        });
    }

    // ★ 快退补偿：视频快播完但学时不够，往回拉进度条
    function checkAndRewind(video) {
        if (!video || video.paused || video.ended) return;
        if (!isFinite(video.duration) || video.duration <= 0) return;
        const remaining = video.duration - video.currentTime;
        // 剩余不到60秒，且学时不够
        if (remaining < 60 && lastRequired > lastViewed) {
            const minutesNeeded = lastRequired - lastViewed;
            const rewindSeconds = Math.min(minutesNeeded * 60, video.duration * 0.8);
            const targetTime = Math.max(0, video.duration - rewindSeconds - 10);
            log('学时不足(' + lastViewed + '/' + lastRequired + ')，视频剩余' + Math.floor(remaining) + '秒，快退至' + Math.floor(targetTime) + '秒');
            video.currentTime = targetTime;
            if (video.paused) forceAutoPlay(video);
        }
    }

    function isNextButtonActive() {
        const btn = document.querySelector('a.btn.next');
        if (!btn || btn.classList.contains('disable')) return false;
        const s = getComputedStyle(btn);
        return !(s.cursor === 'not-allowed' || parseFloat(s.opacity) < 0.5);
    }

    function performGoToNext() {
        if (!isNextButtonActive()) { checkCourseFinished(); return; }
        if (typeof goNext === 'function') goNext();
        else { const btn = document.querySelector('a.btn.next'); if (btn) btn.click(); }
        hasReachedRequired = false;
    }

    function checkCourseFinished() {
        if (!isNextButtonActive()) {
            log('课程结束，返回用户中心');
            window.location.href = 'https://train.haoyuinfo.com/userCenter';
        } else {
            performGoToNext();
        }
    }

    // ========== 主循环 ==========
    function setupCoursePage() {
        // 弹窗监控
        new MutationObserver(closePopup).observe(document.body, { childList: true, subtree: true });
        setInterval(closePopup, 1500);

        // 创建面板
        createStudyPanel();

        // 核心守护循环
        setInterval(() => {
            updateStudyPanel();

            if (hasReachedRequired) return;

            // 跳转条件1：已完成标签
            if (checkCompletedLabel()) {
                hasReachedRequired = true;
                log('检测到已完成标签，跳转');
                const video = getActiveVideo();
                if (video && !video.paused) video.pause();
                closePopup();
                setTimeout(performGoToNext, 300);
                return;
            }

            // 跳转条件2：学时数字达标
            if (checkNumberReached()) {
                hasReachedRequired = true;
                log('学时数字达标，跳转');
                const video = getActiveVideo();
                if (video && !video.paused) video.pause();
                closePopup();
                setTimeout(performGoToNext, 300);
                return;
            }

            // 视频守护
            const video = getActiveVideo();
            if (!video) return;

            // 暂停恢复
            if (video.paused && !video.ended) {
                forceAutoPlay(video);
            }

            // 快退补偿
            if (!video.paused && !video.ended) {
                checkAndRewind(video);
            }
        }, 1000);

        // 初始视频
        const video = getActiveVideo();
        if (video) {
            if (video.readyState >= 2) forceAutoPlay(video);
            else video.addEventListener('canplay', () => forceAutoPlay(video), { once: true });
            video.addEventListener('ended', () => {
                log('视频播放结束');
                closePopup();
                setTimeout(performGoToNext, 2000);
            });
        }
    }

    // ========== 路由 ==========
    const url = window.location.href;
    if (url.includes('/userCenter')) {
        setTimeout(autoEnterCourse, 1500);
    } else if (url.includes('/study/course')) {
        setupCoursePage();
    }
})();