//
//  DNSDispatcher.swift
//  punchnet
//
//  Created by 安礼成 on 2026/4/10.
//
import Foundation

// MARK: - DNS 分流調度器
final class DNSDispatcher {
//    private let localClient: SDLLocalDNSClient
//    private let cloudClient: SDLDNSClient // 假設這是你原有的雲端 Client
//    private let logger: SDLLogger
//    private let internalDomain = "punchsky.com"
//    
//    init(localClient: SDLLocalDNSClient, cloudClient: SDLDNSClient, logger: SDLLogger) {
//        self.localClient = localClient
//        self.cloudClient = cloudClient
//        self.logger = logger
//    }
//    
//    /// 處理來自 TUN 的原始 IP 數據包
//    func dispatch(packet: IPPacket) {
//        // 1. 獲取 UDP 載荷 (假設 IPv4 20字節 + UDP 8字節)
//        let udpPayload = packet.data.suffix(from: 28)
//        
//        // 2. 解析 DNS 內容
//        let parser = DNSParser(data: udpPayload)
//        guard let dnsMsg = parser.parse(), let firstQuestion = dnsMsg.questions.first else {
//            return
//        }
//        
//        let domain = firstQuestion.name
//        
//        // 3. 根據域名分流
//        if domain.hasSuffix(internalDomain) {
//            logger.log("[Dispatcher] Cloud Route: \(domain)", level: .debug)
//            cloudClient.forward(ipPacket: packet) // 雲端通常需要完整包做隧道封裝
//        } else {
//            logger.log("[Dispatcher] Local Route: \(domain)", level: .debug)
//            localClient.query(dnsPayload: udpPayload) // 本地只需轉發載荷
//        }
//    }
}