/**
 * @file SSE流路由处理器
 * @author Yk <yk_9001@icloud.com>
 * @createdAt 2025-07-01
 * @lastModifiedAt 2025-07-01
 * @description 处理SSE连接建立和维持
 */

const express = require('express');
const { v4: uuidV4 } = require('uuid');
const { setupSSEHeaders } = require('../lib/sse');
const clients = require('../lib/clients');

const router = express.Router();

router.get('/', (req, res) => {
    const clientId = req.query.clientId || uuidV4();

    setupSSEHeaders(res);

    // 立即发送确认
    res.write(`data: ${JSON.stringify({
        status: 'connected',
        clientId,
        time: new Date().toISOString()
    })}\n\n`);

    clients.add(clientId, res);

    req.on('close', () => {
        clients.remove(clientId);
    });
});

module.exports = router;