import SwiftUI
import AppKit

@main
struct NetworkCityApp: App {
    @NSApplicationDelegateAdaptor(AppDelegate.self) private var delegate
    @StateObject private var controller = TrafficController()

    var body: some Scene {
        WindowGroup("NetworkCity") {
            CityView(controller: controller)
                .frame(minWidth: 900, minHeight: 620)
                .background(.black)
        }
        .windowStyle(.hiddenTitleBar)
    }
}

/// Running as an SPM executable (no app bundle), so promote ourselves to a
/// regular foreground app and grab focus on launch.
final class AppDelegate: NSObject, NSApplicationDelegate {
    func applicationDidFinishLaunching(_ notification: Notification) {
        NSApp.setActivationPolicy(.regular)
        NSApp.activate(ignoringOtherApps: true)
    }
    func applicationShouldTerminateAfterLastWindowClosed(_ app: NSApplication) -> Bool { true }
}