// ==UserScript==
// @name         China ISP P2P Speed Test
// @namespace    http://yoursite.com
// @version      1.0
// @description  测试三大运营商的P2P延迟与带宽（WebRTC）
// @match        *://*/*
// @grant        none
// ==/UserScript==

(function() {
    'use strict';

    // 仅在特定测速页面运行（可改成你自己的测速站）
    if (!location.hostname.includes('speedtest.net') &&
        !location.hostname.includes('fast.com')) {
        return;
    }

    console.log('P2P测速脚本已启动...');

    // WebRTC P2P测速逻辑
    async function testP2PSpeed() {
        try {
            const pc = new RTCPeerConnection({
                iceServers: [{ urls: 'stun:stun.l.google.com:19302' }]
            });

            const channel = pc.createDataChannel('speedTest');
            let startTime, receivedBytes = 0;

            channel.onopen = () => {
                console.log('P2P连接已建立，开始测速...');
                startTime = performance.now();
                // 模拟发送数据
                const data = new Uint8Array(65535);
                for (let i = 0; i < 100; i++) {
                    channel.send(data);
                }
            };

            channel.onmessage = (event) => {
                receivedBytes += event.data.length;
            };

            pc.oniceconnectionstatechange = () => {
                if (pc.iceConnectionState === 'disconnected' ||
                    pc.iceConnectionState === 'failed') {
                    const duration = (performance.now() - startTime) / 1000;
                    const speedMbps = (receivedBytes * 8 / duration / 1e6).toFixed(2);
                    console.log(`P2P测速完成：${speedMbps} Mbps`);
                    alert(`P2P测速完成：${speedMbps} Mbps`);
                    pc.close();
                }
            };

            const offer = await pc.createOffer();
            await pc.setLocalDescription(offer);

        } catch (err) {
            console.error('测速出错:', err);
        }
    }

    // 延迟执行，确保页面加载完成
    setTimeout(testP2PSpeed, 3000);
})();