const express = require('express');
const path = require('path');
const app = express();
const port = 8898;
const wsPort = 8899;
const WebSocket = require('ws')
const socket = new WebSocket.Server({port:8899})
const chokidar = require('chokidar');

// 要监视的根目录
const rootDir = '.';
// 要忽略的目录数组
const ignoredDirs = ['.vscode', '.idea', 'node_modules', '.git','*.zip'];
// 保存所有连接的客户端
const clients = [];
socket.on('connection',function connection(ws,req){
    clients.push(ws);
    // 当客户端断开连接时，移除客户端
    ws.on('close', () => {
        console.log('Client disconnected');
        const index = clients.indexOf(ws);
        if (index !== -1) clients.splice(index, 1);
    });
    const ip = req.socket.remoteAddress
    const port = req.socket.remotePort
    const clientName = ip + port;
    console.log('%s is connected ',clientName)
})

chokidar.watch(rootDir, {
    ignored: ignoredDirs.concat('**/*.js', '**/*.html'),
    ignoreInitial: true
}).on('all', (event, path) => {
    switch (event) {
        case "change":
        case "add":
            clients.forEach((client) => {
                if (client.readyState === WebSocket.OPEN) {
                    client.send(JSON.stringify(true));
                }
            });
            break;
    }
});

app.use(express.static(path.join(__dirname, '/')));

app.listen(port, () => {
    console.log(`server node start ${port}!`,);
})
console.log(`正在监视${rootDir}目录...`);
console.log('WebSocket服务启动在端口：'+wsPort);