//
//  SDLContextSupervisor.swift
//  Tun
//
//  Created by 安礼成 on 2026/2/2.
//

import Foundation
import NetworkExtension

actor SDLContextSupervisor {
    private var context: SDLContextActor?
    private var tasks: [Task<Void, Never>] = []
    
    public func start(provider: NEPacketTunnelProvider, config: SDLConfiguration, rsaCipher: RSACipher, aesCipher: AESCipher, logger: SDLLogger) async {
        let context = SDLContextActor(provider: provider, config: config, rsaCipher: rsaCipher, aesCipher: aesCipher, logger: logger)
        self.context = context
        
        tasks.append(spawnLoop { try await context.startNoticeClient()})
        tasks.append(spawnLoop { try await context.startUDPHole()})
        tasks.append(spawnLoop { try await context.startDnsClient()})
        tasks.append(spawnLoop { try await context.startMonitor()})
    }
    
    func stop() {
        tasks.forEach {$0.cancel()}
        tasks.removeAll()
    }
    
    private func spawnLoop(_ body: @escaping () async throws -> Void) -> Task<Void, Never> {
        return Task.detached {
            while !Task.isCancelled {
                do {
                    try await body()
                } catch is CancellationError {
                    break
                } catch {
                    try? await Task.sleep(nanoseconds: 2_000_000_000)
                }
            }
        }
    }
    
}