//
//  DeviceProtocol.swift
//  XIONControlPanel
//
//  Created by James Magahern on 3/13/20.
//  Copyright © 2020 XION. All rights reserved.
//

import Foundation

enum DeviceState : String, Codable
{
    case off
    case on
}

enum DeviceType : String, Codable
{
    case `switch`
    case light
}

protocol Device
{
    // Read-only properties
    var name:   String { get }
    var serial: String { get }
    var type:   DeviceType { get }
    
    // Writable properties
    var state:  DeviceState { get set }
}

extension Device where Self: Hashable
{
    func hash(into hasher: inout Hasher)
    {
        hasher.combine(self.serial)
    }
    
    static func == (lhs: Self, rhs: Self) -> Bool
    {
        return lhs.serial == rhs.serial
    }
}

class AnyDevice : Device
{
    private var device: Device
    
    public var name: String
        { return device.name }
    
    public var serial: String
        { return device.serial }
    
    public var type: DeviceType
        { return device.type }
    
    public var state: DeviceState {
        get { return device.state }
        set { device.state = newValue }
    }
    
    init(_ device: Device)
    {
        self.device = device
    }
}

extension AnyDevice : Hashable {}

extension Device {
    func eraseToAnyDevice() -> AnyDevice {
        AnyDevice(self)
    }
}