import SwiftUI

/// Lifts SwiftUI's window actions out of the environment and into `AppModel`, from whatever scene
/// happens to be on screen.
///
/// `openWindow` and `dismissWindow` are only readable from a view, and the two places that most need
/// them are not views: `AppDelegate` (a Dock click with no windows must bring up welcome — 02
/// § Launch and window lifecycle) and the close flush (which dismisses a board's card windows before
/// anything else happens). Both are reached from AppKit, with no environment in sight.
///
/// **The captured actions outlive the view that supplied them.** They are values addressed to the
/// app, not to a window, so the last scene to appear leaves behind actions that still work after
/// every window is gone — which is exactly the windowless reactivation case. That is why this is
/// applied to *every* scene root: whichever one exists, the app has its actions.
///
/// Both are captured together despite the name: they are one capability with two halves, and a
/// second modifier for the second half would be ceremony.
struct CaptureOpenWindow: ViewModifier {

    let appModel: AppModel

    @Environment(\.openWindow) private var openWindow
    @Environment(\.dismissWindow) private var dismissWindow

    func body(content: Content) -> some View {
        content.onAppear {
            appModel.captureWindowActions(open: openWindow, dismiss: dismissWindow)
        }
    }
}

extension View {
    func captureWindowActions(into appModel: AppModel) -> some View {
        modifier(CaptureOpenWindow(appModel: appModel))
    }
}