// ==UserScript==
// @name         Global Slash Search & Vim Scroll (Pro Max)
// @namespace    http://quic.search/
// @version      6.0
// @description  '/'搜索, '?'清空, 'Esc'退出, 'j/k'滚动, 'c'评论区, 'd'发弹幕
// @author       Min9yu3
// @match        *://*/*
// @grant        none
// @license MIT
// @downloadURL https://update.greasyfork.icu/scripts/566545/Global%20Slash%20Search%20%20Vim%20Scroll%20%28Pro%20Max%29.user.js
// @updateURL https://update.greasyfork.icu/scripts/566545/Global%20Slash%20Search%20%20Vim%20Scroll%20%28Pro%20Max%29.meta.js
// ==/UserScript==

(function() {
    'use strict';

    // ==========================================
    // 【核心架构】：站点精准定位策略配置
    // ==========================================
    const siteStrategies = {
        'bilibili.com': {
            wrapper: 'bili-comments', 
            getCommentInput: () => {
                const commentsEl = document.querySelector('bili-comments');
                if (commentsEl && commentsEl.shadowRoot) {
                    const sendEl = commentsEl.shadowRoot.querySelector('bili-comment-send');
                    if (sendEl && sendEl.shadowRoot) {
                        return sendEl.shadowRoot.querySelector('textarea');
                    }
                }
                return document.querySelector('.reply-box-textarea, .reply-box textarea');
            },
            // 新增：B 站专属的弹幕输入框获取策略
            getDanmakuInput: () => {
                // .bpx-player-dm-input 是点播视频的弹幕框
                // .chat-input 是 B 站直播间的弹幕/聊天框
                return document.querySelector('.bpx-player-dm-input, .chat-input');
            }
        },
        'youtube.com': {
            wrapper: '#comments',
            getCommentInput: () => document.querySelector('#contenteditable-root'),
            // YouTube 直播间的聊天框
            getDanmakuInput: () => document.querySelector('#chat-messages #input')
        },
        'default': {
            wrapper: '#comment, #comments, .comment-wrapper',
            getCommentInput: () => document.querySelector('textarea[placeholder*="评论"], textarea[placeholder*="comment" i]'),
            // 泛用型弹幕/聊天框匹配
            getDanmakuInput: () => document.querySelector('input[placeholder*="弹幕"], input[class*="danmaku" i], .chat-input')
        }
    };

    function getCurrentStrategy() {
        const host = window.location.hostname;
        for (const site in siteStrategies) {
            if (site !== 'default' && host.includes(site)) {
                return siteStrategies[site];
            }
        }
        return siteStrategies['default'];
    }

    document.addEventListener('keydown', function(e) {
        const active = document.activeElement;
        const isInputActive = active && (
            active.tagName === 'INPUT' || 
            active.tagName === 'TEXTAREA' || 
            active.isContentEditable
        );

        // 【功能 2】：按 Esc 键退出聚焦，并模拟点击关闭面板
        if (isInputActive && e.key === 'Escape') {
            setTimeout(() => {
                const mousedown = new MouseEvent('mousedown', { bubbles: true, cancelable: true, view: window });
                const mouseup = new MouseEvent('mouseup', { bubbles: true, cancelable: true, view: window });
                document.body.dispatchEvent(mousedown);
                document.body.dispatchEvent(mouseup);
                const click = new MouseEvent('click', { bubbles: true, cancelable: true, view: window });
                document.body.dispatchEvent(click);
                
                active.blur(); 
            }, 20);
            return; 
        }

        if (isInputActive) return;

        // 【功能 4】：j / k 网页上下顺滑滚动
        if (!e.metaKey && !e.ctrlKey && !e.altKey) {
            if (e.key === 'j') {
                e.preventDefault(); 
                window.scrollBy({ top: 150, left: 0, behavior: 'smooth' }); 
                return;
            }
            if (e.key === 'k') {
                e.preventDefault();
                window.scrollBy({ top: -150, left: 0, behavior: 'smooth' }); 
                return;
            }
        }

        // ==========================================
        // 【新增功能 6】：'d' 键直达弹幕输入框 (Danmaku)
        // ==========================================
        if (e.key === 'c' || e.key === 'C') {
            e.preventDefault();
            e.stopPropagation();

            const strategy = getCurrentStrategy();
            if (strategy.getDanmakuInput) {
                const danmakuInput = strategy.getDanmakuInput();
                
                if (danmakuInput) {
                    // 如果你当前正在看底部的评论，按 d 会先平滑滚回上方的播放器区域
//                     danmakuInput.scrollIntoView({ behavior: 'smooth', block: 'center' });
                    
                    // 延迟一点聚焦，等待滚动动画完成
                    setTimeout(() => {
                        danmakuInput.focus();
                    }, 3);
                } else {
                    console.log("[Global Slash Search] 当前页面未找到弹幕输入框。");
                }
            }
            return;
        }

        // 【功能 5】：'c' 键精准定位并聚焦评论区
       

        // 【功能 1 & 3】：'/' 聚焦全选，'?' 聚焦清空 
        if (e.key === '/' || e.key === '?') {
            e.preventDefault();
            e.stopPropagation();
            
            const searchSelectors = [
                'input[type="search"]', 'input[name="q"]', 'input[name="search"]',
                'input[placeholder*="Search" i]', 'input[placeholder*="搜索"]',
                '.nav-search-input'
            ];

            let searchInput = null;
            for (const selector of searchSelectors) {
                const candidates = document.querySelectorAll(selector);
                for (const input of candidates) {
                    if (input.offsetParent !== null && !input.disabled && input.type !== 'hidden') {
                        searchInput = input;
                        break;
                    }
                }
                if (searchInput) break;
            }

            if (searchInput) {
                searchInput.focus();
                if (e.key === '?') {
                    searchInput.value = '';
                } else {
                    searchInput.select();
                }
            }
        }
    }, true); 
})();