//
// Copyright Amazon.com Inc. or its affiliates.
// All Rights Reserved.
//
// SPDX-License-Identifier: Apache-2.0
//

import Foundation

/// Defines a factory to return a NetworkReachabilityProviding instance
public protocol NetworkReachabilityProvidingFactory {
    /// Abstracting the only of Reachability's initializers that we care about into a factory method. Since Reachability
    /// isn't final, we'd have to add a lot of code to conform its initializers otherwise.
#if os(watchOS)
    static func make() -> NetworkReachabilityProviding?
#else
    static func make(for hostname: String) -> NetworkReachabilityProviding?
#endif
}

/// Wraps methods and properties of Reachability
public protocol NetworkReachabilityProviding: AnyObject {
    /// If `true`, device can attempt to reach the host using a cellular connection (WAN). If `false`, host is only
    /// considered reachable if it can be accessed via WiFi
    var allowsCellularConnection: Bool { get set }

    var connection: AmplifyReachability.Connection { get }

    /// The notification center on which "reachability changed" events are being posted
    var notificationCenter: NotificationCenter { get set }

    /// Starts notifications for reachability changes
    func startNotifier() throws

    /// Pauses notifications for reachability changes
    func stopNotifier()
}