import AppKit

enum HavenApplication {
  /// Boots the app. Returns a tiny tuple-style struct so callers (and
  /// tests) can introspect the activation policy the bootstrap installed
  /// without poking at NSApp.shared directly.
  @discardableResult
  static func start(
    delegate: AppDelegate, shouldRun: Bool,
    setDelegate: (AppDelegate) -> Void, run: () -> Void,
    /// Defaults to setting `NSApp.setActivationPolicy(.accessory)` so an
    /// unbundled `swift run` launch still behaves like a menu-bar app and
    /// doesn't grow a Dock icon. The bundled `Info.plist` keeps the same
    /// behaviour via `LSUIElement`, so both paths land on `.accessory`.
    setActivationPolicy: (NSApplication.ActivationPolicy) -> Void =
      { NSApp.setActivationPolicy($0) }
  ) -> ActivationChoice {
    // `.accessory` keeps Haven out of the Dock and out of the Cmd+Tab
    // switcher, matching the bundled `LSUIElement` Info.plist key. The
    // menu-bar status item still shows in both launch modes.
    setActivationPolicy(.accessory)
    setDelegate(delegate)
    if shouldRun { run() }
    return ActivationChoice(policy: .accessory)
  }

  /// Recorded activation policy chosen by `start`. Exposed so tests can
  /// assert that the bootstrap honours the menu-bar contract regardless
  /// of whether the executable was launched from a bundle.
  struct ActivationChoice: Equatable {
    let policy: NSApplication.ActivationPolicy
  }
}