import Foundation

public protocol SettingsProtocol: ObservableObject {
    
    var user: User { get set }
    var showDebugInfo: Bool { get set }
    
}

public class Settings: SettingsProtocol {
    private let defaults: UserDefaults
    public static var shared: any SettingsProtocol = Testing.isUITesting ? TestSettings() : Settings()
    
    @Published
    public var user: User {
        didSet {
            if let json = try? JSONEncoder().encode(self.user) {
                self.defaults.set(json, forKey: "user")
                self.defaults.synchronize()
            }
        }
    }

    public var showDebugInfo: Bool = false {
        didSet {
            self.defaults.set(self.showDebugInfo, forKey: "showDebugInfo")
            self.defaults.synchronize()
        }
    }
    
    public init(defaults: UserDefaults = .standard) {
        self.defaults = defaults
        
        self.defaults.register(defaults: [
            "showDebugInfo": false
        ])
        
        self.showDebugInfo = self.defaults.bool(forKey: "showDebugInfo")
        
        if let data = self.defaults.data(forKey: "user") {
            self.user = (try? JSONDecoder().decode(User.self, from: data)) ?? User()
        } else {
            self.user = User()
        }
    }
}