// What the app tells the complication through the App Group's defaults: whether it is in demo mode,
// and the last summary it saw, which the complication shows when it cannot reach the gateway.

import Foundation

enum SharedState {
    private static var defaults: UserDefaults { UserDefaults(suiteName: DeviceStore.appGroup) ?? .standard }
    private static let demoKey = "demo"
    private static let summaryKey = "summary"

    /// True while the app is in demo mode, so the complication shows the demo counts too.
    static var demo: Bool {
        get { defaults.bool(forKey: demoKey) }
        set { defaults.set(newValue, forKey: demoKey) }
    }

    /// The last summary the app or the complication saw, or nil after signing out.
    static var lastSummary: Summary? {
        get { defaults.data(forKey: summaryKey).flatMap { try? JSON.decoder().decode(Summary.self, from: $0) } }
        set { defaults.set(newValue.flatMap { try? JSON.encoder().encode($0) }, forKey: summaryKey) }
    }
}