wristcode/watch/WristCode/WristCodeApp.swift

// App entry. Notification setup and APNs registration go through the WatchKit app delegate.

import SwiftUI
import WatchKit

@main
struct WristCodeApp: App {
    @WKApplicationDelegateAdaptor(AppDelegate.self) private var delegate
    @State private var model = AppModel.shared

    var body: some Scene {
        WindowGroup {
            RootView()
                .environment(model)
        }
    }
}

struct RootView: View {
    @Environment(AppModel.self) private var model

    var body: some View {
        @Bindable var model = model
        Group {
            if model.mode == .unpaired {
                PairView()
            } else {
                NavigationStack(path: $model.path) {
                    FeedView()
                        .navigationDestination(for: Route.self) { route in
                            switch route {
                            case let .thread(hostId, threadId):
                                ThreadView(hostId: hostId, threadId: threadId)
                            case .newThread:
                                NewThreadView()
                            }
                        }
                }
            }
        }
        .fontDesign(.rounded)
        .tint(Theme.work)
        .onOpenURL { model.open(url: $0) }
    }
}

final class AppDelegate: NSObject, WKApplicationDelegate {
    func applicationDidFinishLaunching() {
        NotificationHandler.shared.install()
        Task { await AppModel.shared.enableNotifications() }
    }

    func didRegisterForRemoteNotifications(withDeviceToken deviceToken: Data) {
        AppModel.shared.didRegister(apnsToken: deviceToken)
    }

    func didFailToRegisterForRemoteNotificationsWithError(_ error: any Error) {
        print("APNs registration failed: \(error.localizedDescription)")
    }
}