// ==UserScript==
// @name         网页加载分析(改)
// @version      1.11
// @description  测试网页加载速度并显示加载最慢的三个网址的域名，二改添加了对Via浏览器toast的调用。
// @description:en Test the webpage loading speed and display the domain names of the three slowest loading URLs.
// @match        *://*/*
// @run-at       document-start
// @author       yzcjd & nobody
// @author2      Lama AI 辅助
// @namespace    https://scriptcat.org/zh-CN/users/157252
// @exclude      *://*.cloudflare.com/*
// @exclude      *://*.recaptcha.net/*
// @license      MIT
// @grant        GM_setValue
// @grant        GM_getValue
// @grant        GM_registerMenuCommand
// @downloadURL none
// ==/UserScript==

(function() {
    'use strict';

    if (typeof GM_registerMenuCommand === 'function') {
        // 记录网站是否开启测试
        const currentDomain = location.hostname || 'unknown';
        const domainSettings = GM_getValue('domainSettings', {});
        const isEnabled = domainSettings[currentDomain] !== false;
        GM_registerMenuCommand(`${isEnabled ? '禁用' : '启用'} 网页加载测试（${currentDomain}）`, () => {
            domainSettings[currentDomain] = !isEnabled;
            GM_setValue('domainSettings', domainSettings);
            alert(`网页加载测试已${!isEnabled ? '启用' : '禁用'}（${currentDomain}），刷新页面生效。`);
        });
        if (!isEnabled) {
            return;
        }
    }

    const loadTimeElement = document.createElement('div');
    loadTimeElement.id = 'loadTimeDisplay';
    loadTimeElement.style.cssText = `
        position: fixed;
        top: 90%;
        left: 50%;
        transform: translate(-50%, -50%);
        background: rgba(255, 255, 255, 0.3); /* 半透明毛玻璃背景 */
        backdrop-filter: blur(16px); /* 高斯模糊 */
        -webkit-backdrop-filter: blur(16px); /* 兼容 Safari */
        padding: 12px 20px; /* 舒适内边距 */
        border-radius: 22px; /* iOS 风格圆角 */
        box-shadow: 0 6px 24px rgba(0, 0, 0, 0.15); /* 柔和阴影 */
        white-space: nowrap;
        width: auto; /* 自适应宽度 */
        max-width: 90%; /* 防止溢出 */
        z-index: 9999;
        color: #1C2526; /* 深色文字，确保可读 */
        font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; /* iOS 字体 */
        font-size: 15px; /* 优雅字体大小 */
        font-weight: 500; /* 适中字重 */
        text-align: center; /* 文字居中 */
        border: 1px solid rgba(255, 255, 255, 0.25); /* 微弱边框增加质感 */
        opacity: 0; /* 初始透明 */
        transition: opacity 0.3s ease-in-out; /* 淡入动画 */
    `;

    // 降级兼容：如果不支持 backdrop-filter，使用纯色背景
    if (!CSS.supports('backdrop-filter', 'blur(12px)')) {
        loadTimeElement.style.background = 'rgba(240, 240, 240, 0.85)';
    }

    const startTime = performance.now();
    let slowestRequests = [];

    const networkObserver = new PerformanceObserver((list, observer) => {
        const entries = list.getEntries();
        entries.forEach(entry => {
            slowestRequests.push({
                name: entry.name,
                duration: entry.duration
            });
            slowestRequests.sort((a, b) => b.duration - a.duration);
            slowestRequests = slowestRequests.slice(0, 3);
        });
    });

    networkObserver.observe({
        entryTypes: ['resource']
    });

    window.addEventListener('load', () => {
        const endTime = performance.now();
        const timeElapsed = endTime - startTime;

        let networkInfo = '';
        let networkInfoHTML = '';
        if (slowestRequests.length > 0) {
            networkInfo = slowestRequests.map(req => {
                try {
                    const url = new URL(req.name);
                    return `Slow: ${url.hostname} (${req.duration.toFixed(2)}ms)`;
                } catch (error) {
                    return `Slow: Invalid URL (${req.duration.toFixed(2)}ms)`;
                }
            }).join('\n');
            networkInfoHTML = slowestRequests.map(req => {
                try {
                    const url = new URL(req.name);
                    return `slow: ${url.hostname} (${req.duration.toFixed(2)}ms)<br>`;
                } catch (error) {
                    return `slow: Invalid URL (${req.duration.toFixed(2)}ms)<br>`;
                }
            }).join('');
        } else {
            networkInfo = '[none]';
            networkInfoHTML = '[none]';
        }

        if (window.via && typeof window.via.toast === 'function') {
            const message = `Time: ${timeElapsed.toFixed(2)}ms\n${networkInfo}`;
            window.via.toast(message);
        } else {
            loadTimeElement.innerHTML = `
                <h2 style="margin: 0; font-size: 16px; font-weight: 600;">Time: ${timeElapsed.toFixed(2)}ms</h2>
                ${networkInfoHTML}
            `;
            document.body.appendChild(loadTimeElement);
            setTimeout(() => {
                loadTimeElement.style.opacity = '1';
            }, 100);
            setTimeout(() => {
                loadTimeElement.style.opacity = '0';
                setTimeout(() => {
                    loadTimeElement.remove();
                }, 300);
            }, 2600);
        }
    });
})();