import Foundation

public protocol SettingsProtocol {
    
    var user: User { get set }
    var recognizeAlternativeOrder: Bool { get set }
    var recognizeShortenedNumbers: Bool { get set }
    var defaultRegion: String { get set }
    var recordBeep: Bool { get set }
    var showDebugInfo: Bool { get set }
    
}

public class Settings: ObservableObject, SettingsProtocol {
    private let defaults: UserDefaults
    public static var shared: SettingsProtocol = Testing.isUITesting ? TestSettings() : Settings()
    
    public var user: User {
        didSet {
            if let json = try? JSONEncoder().encode(self.user) {
                self.defaults.set(json, forKey: "user")
                self.defaults.synchronize()
            }
        }
    }
    
    public var recognizeAlternativeOrder: Bool = false {
        didSet {
            self.defaults.set(self.recognizeAlternativeOrder, forKey: "recognizeAlternativeOrder")
            self.defaults.synchronize()
        }
    }
    
    public var recognizeShortenedNumbers: Bool = false {
        didSet {
            self.defaults.set(self.recognizeShortenedNumbers, forKey: "recognizeShortenedNumbers")
            self.defaults.synchronize()
        }
    }
    
    public var defaultRegion: String = "" {
        didSet {
            self.defaults.set(self.defaultRegion, forKey: "defaultRegion")
            self.defaults.synchronize()
        }
    }
    
    public var recordBeep: Bool = false {
        didSet {
            self.defaults.set(self.recordBeep, forKey: "recordBeep")
            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: [
            "recognizeAlternativeOrder": false,
            "recognizeShortenedNumbers": false,
            "defaultRegion": "161",
            "recordBeep": false,
            "showDebugInfo": false
        ])
        
        self.recognizeAlternativeOrder = self.defaults.bool(forKey: "recognizeAlternativeOrder")
        self.recognizeShortenedNumbers = self.defaults.bool(forKey: "recognizeShortenedNumbers")
        self.defaultRegion = self.defaults.string(forKey: "defaultRegion") ?? "161"
        self.recordBeep = self.defaults.bool(forKey: "recordBeep")
        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()
        }
    }
}