import Adwaita
import Foundation

@propertyWrapper
public struct Injected<T> {

    private let keyPath: KeyPath<InjectionValues, T?>
    private let observerRef: ObserverRef

    public var wrappedValue: T {
        DIContainer.shared.resolve(keyPath)
    }

    public init(_ keyPath: KeyPath<InjectionValues, T?>) {
        self.keyPath = keyPath
        self.observerRef = ObserverRef()
        observerRef.id = DIContainer.shared.addObserver(for: keyPath) {
            Task { @MainActor in
                StateManager.updateViews()
            }
        }
    }
}

private final class ObserverRef {
    var id: UUID?
    deinit {
        if let id {
            DIContainer.shared.removeObserver(id)
        }
    }
}