import Foundation
import WatchConnectivity

@MainActor
final class WatchConnectivityService: NSObject, WCSessionDelegate {
    static let shared = WatchConnectivityService()

    private override init() {
        super.init()
        activateIfSupported()
    }

    private func activateIfSupported() {
        guard WCSession.isSupported() else { return }
        let session = WCSession.default
        session.delegate = self
        session.activate()
    }

    func session(
        _ session: WCSession,
        activationDidCompleteWith activationState: WCSessionActivationState,
        error: Error?
    ) {
        // Intentionally empty: activation state is handled by WCSession.
    }

    func sessionDidBecomeInactive(_ session: WCSession) {
        // No-op; required for iOS WCSessionDelegate.
    }

    func sessionDidDeactivate(_ session: WCSession) {
        session.activate()
    }
}