// ==UserScript==
// @name         bw-learn-tool
// @namespace    http://tampermonkey.net/
// @version      1.1.5
// @description  自动静音、自动播放、自动下一节
// @author       jinxhcn
// @match        *://learn.baowugroup.com/*
// @grant        unsafeWindow
// @license      MIT
// @run-at       document-idle
// ==/UserScript==

(function() {
    'use strict';
    console.log('✅ 宝武学习助手 v1.1.5');
    const $max = 10;
    const $chk = 2000;
    let $st = {
        $hcn: false,
        $pa: 0,
        $lvs: '',
        $wfp: false,
        $tm: null,
        $uf: false
    };
    function $gv() {
        return document.querySelector('#xg-video video');
    }
    function $hns() {
        const current = document.querySelector('.el-tree-node.is-current');
        if (!current) return false;
        let node = current;
        while (node) {
            let next = node.nextElementSibling;
            while (next) {
                if (next.classList.contains('el-tree-node')) return true;
                next = next.nextElementSibling;
            }
            node = node.parentElement?.closest?.('.el-tree-node');
        }
        return false;
    }
    function $cns() {
        const candidates = ['播放下一节', '下一节'];
        for (const text of candidates) {
            const btns = document.querySelectorAll('button');
            for (const btn of btns) {
                if (btn.offsetParent !== null &&
                    (btn.innerText.trim() === text || btn.innerText.includes(text))) {
                    btn.click();
                    console.log('✅ 已点击“下一节”');
                    return true;
                }
            }
        }
        const hints = document.querySelectorAll('*');
        for (const el of hints) {
            if (el.offsetParent !== null &&
                el.innerText?.trim() === '本节播放结束, 是否继续播放？') {
                const container = el.closest('.play-chapter') || el.parentElement;
                if (container) {
                    const btn = container.querySelector('button');
                    if (btn && btn.offsetParent !== null) {
                        btn.click();
                        console.log('✅ 已点击“下一节”（通过结束提示）');
                        return true;
                    }
                }
                break;
            }
        }
        const primaryBtns = document.querySelectorAll('.el-button--primary');
        for (const btn of primaryBtns) {
            if (btn.offsetParent !== null && btn.innerText.includes('下一节')) {
                btn.click();
                console.log('✅ 已点击“下一节”(Primary 按钮)');
                return true;
            }
        }
        console.warn('⚠️ 未找到“下一节”按钮');
        return false;
    }
    function $pcv(video) {
        if (!video) return false;
        if (video.ended || !video.paused) return false;
        if ($st.$pa >= $max) {
            console.warn(`⏸️ 已尝试 ${$max} 次，暂停播放尝试`);
            return false;
        }
        $st.$pa++;
        if (!video.muted) {
            video.muted = true;
            console.log('🔇 已静音');
        }
        const playBtn = document.querySelector('.xgplayer-start');
        if (playBtn && playBtn.offsetParent !== null) {
            playBtn.click();
            console.log(`▶️ 点击中央播放按钮 (${$st.$pa}/${$max})`);
            return true;
        }
        const icon = document.querySelector('.xgplayer-play .xgplayer-icon');
        if (icon && icon.offsetParent !== null) {
            icon.click();
            console.log(`▶️ 点击控制栏播放图标 (${$st.$pa}/${$max})`);
            return true;
        }
        const container = document.querySelector('#xg-video, .xgplayer');
        if (container) {
            container.click();
            console.log(`▶️ 点击视频画面区域 (${$st.$pa}/${$max})`);
            return true;
        }
        video.play().catch(() => {});
        console.log(`▶️ 调用原生 video.play() (${$st.$pa}/${$max})`);
        return true;
    }
    function $rps() {
        clearTimeout($st.$tm);
        $st.$pa = 0;
        $st.$hcn = false;
        $st.$wfp = true;
        $st.$uf = false;
        $st.$tm = setTimeout(() => {
            $st.$wfp = false;
            if (!document.hidden) {
                const video = $gv();
                if (video) $pcv(video);
            }
        }, 300);
    }
    function $ml() {
        const video = $gv();
        if (video) {
            const currentSrc = video.currentSrc || video.src;
            if (currentSrc && currentSrc !== $st.$lvs) {
                $st.$lvs = currentSrc;
                $rps();
            }
        }
        if (video && !video.paused) {
            if ($st.$wfp) {
                clearTimeout($st.$tm);
                $st.$wfp = false;
            }
            if ($st.$pa > 0) {
                $st.$pa = 0;
            }
            if (!$st.$uf) {
                const startBtn = document.querySelector('.xgplayer-start');
                if (startBtn && startBtn.offsetParent !== null) {
                    startBtn.classList.add('hide');
                    console.log('🎯 隐藏中央按钮');
                }
                const overlay = document.querySelector('.video-overlay');
                if (overlay && overlay.offsetParent !== null) {
                    overlay.style.display = 'none';
                    console.log('🎯 隐藏视频覆盖层');
                }
                $st.$uf = true;
            }
            return;
        }
        if (video && video.ended) {
            if ($hns() && !$st.$hcn) {
                if ($cns()) {
                    $st.$hcn = true;
                }
            } else if (!$hns()) {
                console.log('🏁 所有课程已播放完毕');
            }
            return;
        }
        if (video && video.paused && !$st.$wfp) {
            const overlay = document.querySelector('.video-overlay');
            if (overlay) {
                overlay.style.display = '';
                console.log('🔄 恢复视频覆盖层显示 (暂停状态)');
            }
            $st.$uf = false;
            $pcv(video);
            return;
        }
        if (!$st.$hcn) {
            const hints = document.querySelectorAll('*');
            for (const el of hints) {
                if (el.offsetParent !== null &&
                    el.innerText?.trim() === '本节播放结束, 是否继续播放？') {
                    if ($hns()) {
                        if ($cns()) {
                            $st.$hcn = true;
                        }
                    }
                    break;
                }
            }
        }
    }
    setInterval($ml, $chk);
    document.addEventListener('visibilitychange', () => {
        if (!document.hidden) {
            if ($st.$wfp) {
                clearTimeout($st.$tm);
                $st.$wfp = false;
                const video = $gv();
                if (video) $pcv(video);
            }
            setTimeout($ml, 500);
        }
    });
})();