//
//  PreferencesEnvironmentKey.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 LuminateCore
import Portico

/// The environment slot that carries the preference coordinator down the view tree.
package enum PreferencesEnvironmentKey: EnvironmentKey {
    /// The process-wide coordinator.
    ///
    /// Portico caches this in a shared default box, so `@Preference` resolves with no injection.
    /// A subtree may still override it with `.environment(\.preferences, other)`.
    package static var defaultValue: Preferences { Preferences.shared }
}

extension EnvironmentValues {
    /// The preference coordinator visible to this subtree.
    package var preferences: Preferences {
        get { self[PreferencesEnvironmentKey.self] }
        set { self[PreferencesEnvironmentKey.self] = newValue }
    }
}