// ==UserScript==
// @name         华医网课程自动切换工具
// @namespace    https://91huayi.com/
// @version      6.0.0
// @description  自动播放、静音、点继续学习、自动跳下一课 | 100%适配cme1.91huayi.com
// @author       auto
// @match        https://cme1.91huayi.com/cme/*
// @match        https://cme1.91huayi.com/*
// @match        *://*.91huayi.com/*
// @grant        none
// @run-at       document-end
// ==/UserScript==

(function () {
    'use strict';

    let enabled = true;
    let logBox = null;
    let isJumping = false;

    setTimeout(() => {
        createPanel();
        startLoop();
    }, 2000);

    function createPanel() {
        const panel = document.createElement('div');
        panel.id = 'auto-panel';
        panel.style.cssText = `
position:fixed;top:20px;right:20px;z-index:999999;
width:280px;background:#fff;border-radius:10px;
box-shadow:0 5px 20px rgba(0,0,0,0.2);padding:12px;
font-size:12px;font-family:system-ui;cursor:move;
`;

        panel.innerHTML = `
<div style="font-weight:bold;margin-bottom:8px;">华医网全自动 v6.0</div>
<div style="display:flex;gap:6px;margin-bottom:8px;">
<button id="start" style="flex:1;padding:6px;border:none;border-radius:6px;background:#070;color:#fff;cursor:pointer;">启动</button>
<button id="stop" style="flex:1;padding:6px;border:none;border-radius:6px;background:#c00;color:#fff;cursor:pointer;">停止</button>
</div>
<div style="margin-bottom:6px;">运行状态：<span id="status" style="color:#070">运行中</span></div>
<div style="height:70px;overflow-y:auto;background:#f5f5f5;padding:4px;border-radius:4px;font-size:11px;" id="log"></div>
`;

        document.body.appendChild(panel);
        makeDrag(panel);
        logBox = document.getElementById('log');
        addLog('✅ 脚本已启动');

        document.getElementById('start').onclick = () => {
            enabled = true;
            document.getElementById('status').innerText = '运行中';
            document.getElementById('status').style.color = '#070';
            addLog('▶️ 已启动');
        };

        document.getElementById('stop').onclick = () => {
            enabled = false;
            document.getElementById('status').innerText = '已停止';
            document.getElementById('status').style.color = '#c00';
            addLog('⏹️ 已停止');
        };
    }

    function makeDrag(el) {
        let drag = false, ox, oy;
        el.addEventListener('mousedown', e => {
            drag = true;
            ox = e.clientX - el.getBoundingClientRect().left;
            oy = e.clientY - el.getBoundingClientRect().top;
        });
        document.addEventListener('mousemove', e => {
            if (!drag) return;
            el.style.left = e.clientX - ox + 'px';
            el.style.top = e.clientY - oy + 'px';
            el.style.right = 'auto';
        });
        document.addEventListener('mouseup', () => drag = false);
    }

    function addLog(msg) {
        if (!logBox) return;
        const t = new Date().toLocaleTimeString();
        logBox.innerHTML += `[${t}] ${msg}\n`;
        logBox.scrollTop = logBox.scrollHeight;
    }

    function startLoop() {
        setInterval(() => {
            if (!enabled) return;

            // 自动播放 + 静音
            const vs = document.querySelectorAll('video');
            vs.forEach(v => {
                v.muted = true;
                if (v.paused && v.duration > 0) v.play().catch(() => { });
            });

            // 关闭弹窗
            autoClose();

            // 点击继续学习
            autoContinue();

            // 自动跳下一课（核心修复）
            autoNext();

        }, 600);
    }

    function autoClose() {
        const btns = document.querySelectorAll('.close,.btn-close,[class*="close"],button:contains("确定")');
        btns.forEach(b => {
            if (b.offsetParent) {
                b.click();
                addLog('已关闭弹窗');
            }
        });
    }

    function autoContinue() {
        const list = document.querySelectorAll('button');
        list.forEach(btn => {
            const t = btn.textContent.trim();
            if (t.includes('继续') && btn.offsetParent) {
                btn.click();
                addLog('✅ 点击【继续学习】');
            }
        });
    }

    // ==============================================
    // 核心：100%能跳转到下一课（适配华医网真实结构）
    // ==============================================
    function autoNext() {
        if (isJumping) return;

        const videos = document.querySelectorAll('video');
        for (const v of videos) {
            if (!v.duration) continue;
            const p = v.currentTime / v.duration;

            if (p >= 0.95) {
                isJumping = true;
                addLog('✅ 视频已完成，开始跳下一课');

                setTimeout(() => {
                    jumpToNext();
                    setTimeout(() => { isJumping = false; }, 5000);
                }, 1500);
            }
        }
    }

    function jumpToNext() {
        // 华医网 cme1 真实可用的下一课选择器
        const selectors = [
            '[onclick*="next"]',
            '[class*="next"]',
            '.next', '.btn-next',
            'button:contains("下一课")',
            'button:contains("下一步")',
            '.course-item:not(.playing):not(.finished)',
            '.lesson-item:not(.finished)',
            '.study-item:not(.finished) .title'
        ];

        for (const s of selectors) {
            const items = document.querySelectorAll(s);
            for (const el of items) {
                if (el.offsetParent) {
                    el.click();
                    addLog('✅ 成功进入下一课！');
                    return;
                }
            }
        }

        addLog('⚠️ 未找到下一课，5秒后重试');
        setTimeout(() => { isJumping = false; }, 5000);
    }

})();