//
//  Injected.swift
//
//  Copyright 2026 Brendan Szymanski <hello@bscubed.dev>
//
//  This program is free software: you can redistribute it and/or modify
//  it under the terms of the GNU General Public License as published by
//  the Free Software Foundation, either version 3 of the License, or
//  (at your option) any later version.
//
//  This program is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU General Public License for more details.
//
//  You should have received a copy of the GNU General Public License
//  along with this program.  If not, see <https://www.gnu.org/licenses/>.
//
//  SPDX-License-Identifier: GPL-3.0-or-later
//

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(
            id: DIContainer.shared.addObserver(for: keyPath) {
                StateManager.updateViews()
            }
        )
    }
}

private final class ObserverRef {
    let id: UUID
    init(id: UUID) { self.id = id }
    deinit { DIContainer.shared.removeObserver(id) }
}