// The MIT License (MIT)
//
// Copyright (c) 2017 Alexander Grebenyuk (github.com/kean).

import Foundation
import Alamofire
import RxSwift
import RxCocoa


final class Reachability {
    static var shared: Reachability {
        return AppContainer.shared.reachability
    }

    /// Monitors general network reachability.
    let reachability = NetworkReachabilityManager()

    var didBecomeReachable: Signal<Void> { return _didBecomeReachable.asSignal() }
    private let _didBecomeReachable = PublishRelay<Void>()

    init() {
        self.isReachable = _isReachable.asDriver()

        if let reachability = self.reachability {
            reachability.listener = { [weak self] in
                self?.update($0)
            }
            reachability.startListening()
        }
    }

    private func update(_ status: NetworkReachabilityManager.NetworkReachabilityStatus) {
        if case .reachable = status {
            _didBecomeReachable.accept(())
        }
    }
}