// ==UserScript==
// @name         一键生成直连短链 (快捷键 dd 版)
// @namespace    https://github.com/
// @version      4.0
// @description  连续按两次 'd' 触发生成 Is.gd 直连短链，自动跳过输入框
// @author       Gemini
// @match        *://*/*
// @grant        GM_xmlhttpRequest
// @grant        GM_setClipboard
// @connect      is.gd
// @downloadURL https://update.greasyfork.icu/scripts/564447/%E4%B8%80%E9%94%AE%E7%94%9F%E6%88%90%E7%9B%B4%E8%BF%9E%E7%9F%AD%E9%93%BE%20%28%E5%BF%AB%E6%8D%B7%E9%94%AE%20dd%20%E7%89%88%29.user.js
// @updateURL https://update.greasyfork.icu/scripts/564447/%E4%B8%80%E9%94%AE%E7%94%9F%E6%88%90%E7%9B%B4%E8%BF%9E%E7%9F%AD%E9%93%BE%20%28%E5%BF%AB%E6%8D%B7%E9%94%AE%20dd%20%E7%89%88%29.meta.js
// ==/UserScript==

(function() {
    'use strict';

    let isProcessing = false;
    let lastKeyTime = 0;
    const DOUBLE_PRESS_DELAY = 400; // 两次按键的最大间隔（毫秒）

    async function convertAndCopy() {
        if (isProcessing) return;
        isProcessing = true;
        
        showStatus('⌛ 正在生成...');

        const apiUrl = `https://is.gd/create.php?format=simple&url=${encodeURIComponent(window.location.href)}`;

        GM_xmlhttpRequest({
            method: 'GET',
            url: apiUrl,
            onload: function(response) {
                if (response.status === 200) {
                    const shortUrl = response.responseText.trim();
                    GM_setClipboard(shortUrl);
                    showStatus('✅ 短链已复制: ' + shortUrl);
                } else {
                    showStatus('❌ 失败: ' + response.status);
                }
                isProcessing = false;
            },
            onerror: () => { 
                showStatus('🌐 网络异常 (大陆部分地区受限)'); 
                isProcessing = false;
            }
        });
    }

    // 状态提示逻辑
    function showStatus(msg) {
        let tip = document.getElementById('isgd-status-tip');
        if (!tip) {
            tip = document.createElement('div');
            tip.id = 'isgd-status-tip';
            tip.style.cssText = 'position:fixed;top:20px;left:50%;transform:translateX(-50%);background:#333;color:white;padding:10px 20px;border-radius:20px;z-index:2147483647;font-size:13px;box-shadow:0 4px 12px rgba(0,0,0,0.3);transition: opacity 0.3s;';
            document.body.appendChild(tip);
        }
        tip.innerText = msg;
        tip.style.opacity = '1';
        
        // 自动隐藏逻辑
        clearTimeout(window.isgdTimer);
        window.isgdTimer = setTimeout(() => {
            tip.style.opacity = '0';
            setTimeout(() => tip.remove(), 300);
        }, 2500);
    }

    // 键盘监听逻辑
    window.addEventListener('keydown', function(e) {
        // 1. 冲突回避：如果焦点在输入框或可编辑区域，则不触发
        const activeElem = document.activeElement;
        const isInput = activeElem.tagName === 'INPUT' || 
                        activeElem.tagName === 'TEXTAREA' || 
                        activeElem.isContentEditable;
        
        if (isInput) return;

        // 2. 序列匹配：识别 "dd"
        if (e.key.toLowerCase() === 'd') {
            const currentTime = new Date().getTime();
            if (currentTime - lastKeyTime < DOUBLE_PRESS_DELAY) {
                // 成功触发
                convertAndCopy();
                lastKeyTime = 0; // 重置计数
            } else {
                lastKeyTime = currentTime;
            }
        } else {
            lastKeyTime = 0; // 按了其他键，重置序列
        }
    });

})();