/*

 Copyright (C) 2016 Apple Inc. All Rights Reserved.

 See LICENSE.txt for this sample’s licensing information

 Abstract:

 Defaults is a nice wrapper around NSUserDefaults and declares our global user defaults (useDarkMode)

 */

import Cocoa

struct PreferenceKey<Value> : RawRepresentable {

    typealias RawValue = String 

    let rawValue: RawValue

    init (_ key: String) {

        rawValue = key

    }

    // Appease the protocol.

    init (rawValue: RawValue) {

        self.rawValue = rawValue

    }

}

extension Notification.Name {

    static let appearanceChanged = Notification.Name(rawValue: "AppearanceChangedNotification")

}

extension UserDefaults {

    subscript(key: PreferenceKey<Bool>) -> Bool {

        set { set(newValue, forKey: key.rawValue) }

        get { return bool(forKey: key.rawValue) }

    }

    subscript(key: PreferenceKey<Float>) -> Float {

        set { set(newValue, forKey: key.rawValue) }

        get { return float(forKey: key.rawValue) }

    }

    subscript(key: PreferenceKey<Double>) -> Double {

        set { set(newValue, forKey: key.rawValue) }

        get { return double(forKey: key.rawValue) }

    }

    subscript(key: PreferenceKey<Int>) -> Int {

        set { set(newValue, forKey: key.rawValue) }

        get { return integer(forKey: key.rawValue) }

    }

}

// User defaults for our application

extension UserDefaults {

    static let useDarkModeKey = PreferenceKey<Bool>("UseDarkMode")

    static var useDarkMode: Bool {

        get {

            return UserDefaults.standard[useDarkModeKey]

        }

    }

}