import Foundation
import Network
import Observation

@Observable
@MainActor
final class NetworkMonitor {
    var isOnline: Bool = true

    private let monitor = NWPathMonitor()
    private let queue = DispatchQueue(label: "NetworkMonitor")

    func start(onChange: @escaping @MainActor (Bool) -> Void) {
        monitor.pathUpdateHandler = { [weak self] path in
            let online = path.status == .satisfied
            Task { @MainActor [weak self] in
                guard let self else { return }
                let previous = self.isOnline
                self.isOnline = online
                if previous != online {
                    onChange(online)
                }
            }
        }
        monitor.start(queue: queue)
    }

    func stop() {
        monitor.cancel()
    }
}