// ==UserScript==

// @name         视频拖拽快进后退（终极防干扰版）

// @namespace    http://tampermonkey.net/

// @version      3.0

// @description  鼠标左右拖拽视频快进后退，拖拽后绝不改变播放状态，保留单击/双击

// @author       豆包

// @match        *://*/*

// @grant        none

// @license MIT

// @downloadURL https://update.greasyfork.icu/scripts/571779/%E8%A7%86%E9%A2%91%E6%8B%96%E6%8B%BD%E5%BF%AB%E8%BF%9B%E5%90%8E%E9%80%80%EF%BC%88%E7%BB%88%E6%9E%81%E9%98%B2%E5%B9%B2%E6%89%B0%E7%89%88%EF%BC%89.user.js
// @updateURL https://update.greasyfork.icu/scripts/571779/%E8%A7%86%E9%A2%91%E6%8B%96%E6%8B%BD%E5%BF%AB%E8%BF%9B%E5%90%8E%E9%80%80%EF%BC%88%E7%BB%88%E6%9E%81%E9%98%B2%E5%B9%B2%E6%89%B0%E7%89%88%EF%BC%89.meta.js
// ==/UserScript==

(function() {

    'use strict';

    const DRAG_SPEED = 0.1;

    const MIN_DRAG = 6;

    let isDrag = false;

    let startX = 0;

    let origTime = 0;

    let wasPlaying = false;

    let curVideo = null;

    let justDragged = false; // 标记刚拖拽过，屏蔽本次点击

    // 拖拽结束后屏蔽一次点击，防止网站触发暂停

    function blockClickOnce() {

        justDragged = true;

        setTimeout(() => { justDragged = false; }, 100);

    }

    function init(video) {

        if (video.dataset.dragInited) return;

        video.dataset.dragInited = '1';

        // 拦截点击：如果刚拖拽过，阻止本次点击（核心修复）

        video.addEventListener('click', e => {

            if (justDragged) {

                e.preventDefault();

                e.stopPropagation();

                return;

            }

        }, true); // 捕获模式优先执行

        // 鼠标按下

        video.addEventListener('mousedown', e => {

            if (e.button !== 0) return;

            isDrag = false;

            startX = e.clientX;

            curVideo = video;

            origTime = video.currentTime;

            wasPlaying = !video.paused;

        });

        // 拖拽移动

        video.addEventListener('mousemove', e => {

            if (!curVideo || e.button !== 0) return;

            const dx = e.clientX - startX;

            if (Math.abs(dx) < MIN_DRAG) return;

            isDrag = true;

            e.preventDefault();

            e.stopPropagation();

            const t = origTime + dx * DRAG_SPEED;

            curVideo.currentTime = Math.max(0, Math.min(t, curVideo.duration || 0));

        });

        // 结束拖拽

        function end() {

            if (!curVideo) return;

            if (isDrag) {

                blockClickOnce(); // 屏蔽本次点击

                // 强制恢复状态，延迟执行确保覆盖网站逻辑

                setTimeout(() => {

                    wasPlaying ? curVideo.play().catch(()=>{}) : curVideo.pause();

                }, 0);

            }

            isDrag = false;

            curVideo = null;

        }

        video.addEventListener('mouseup', end);

        video.addEventListener('mouseleave', end);

    }

    // 初始化所有视频

    document.querySelectorAll('video').forEach(init);

    // 监听动态视频

    new MutationObserver(muts => {

        muts.forEach(m => {

            m.addedNodes.forEach(n => {

                if (n.tagName === 'VIDEO') init(n);

                n.querySelectorAll?.('video').forEach(init);

            });

        });

    }).observe(document.body, { childList: true, subtree: true });

})();