//
//  Device.swift
//  bytes
//
//  Created by Cornelius Horstmann on 04.01.17.
//  Copyright © 2017 TBO INTERACTIVE GmbH & Co. KG. All rights reserved.
//

import UIKit
import Foundation

/// The Device Struct holds important information about a Device.
public struct Device {
    
    /// The platform name of the device i.e. "iPhone1,1" or "iPad3,6"
    public let platform: String
    
    /// The version number of the OS as String i.e. "1.2" or "9.4"
    public let osVersion: String
    
    public init(platform: String, osVersion: String) {
        self.platform = platform
        self.osVersion = osVersion
    }
    
    /// The current device.
    static public let current = Device.currentDevice()
    
    static private func currentDevice() -> Device {
        var size = 0
        sysctlbyname("hw.machine", nil, &size, nil, 0)
        var machine = [CChar](repeating: 0,  count: Int(size))
        sysctlbyname("hw.machine", &machine, &size, nil, 0)
        let platform = String(cString: machine)
        let osVersion = UIDevice.current.systemVersion
        return Device(platform: platform, osVersion: osVersion)
    }
    
    /// A human readable version of the platform name i.e. "iPhone 6 Plus" or "iPad Air 2 (WiFi)"
    /// Or nil in case no human readable name was found.
    public var humanReadablePlatform: String? {
        get {
            switch platform {
            // iPhone
            case "iPhone1,1":    return "iPhone 1G"
            case "iPhone1,2":    return "iPhone 3G"
            case "iPhone2,1":    return "iPhone 3GS"
            case "iPhone3,1":    return "iPhone 4"
            case "iPhone3,2":    return "iPhone 4 (Revision A)"
            case "iPhone3,3":    return "Verizon iPhone 4"
            case "iPhone4,1":    return "iPhone 4S"
            case "iPhone5,1":    return "iPhone 5 (GSM)"
            case "iPhone5,2":    return "iPhone 5 (GSM+CDMA)"
            case "iPhone5,3":    return "iPhone 5c (GSM)"
            case "iPhone5,4":    return "iPhone 5c (Global)"
            case "iPhone6,1":    return "iPhone 5s (GSM)"
            case "iPhone6,2":    return "iPhone 5s (Global)"
            case "iPhone7,1":    return "iPhone 6 Plus"
            case "iPhone7,2":    return "iPhone 6"
            case "iPhone8,1":    return "iPhone 6s"
            case "iPhone8,2":    return "iPhone 6s Plus"
            case "iPhone8,4":    return "iPhone SE"
            case "iPhone9,1":    return "iPhone 7 (GSM+CDMA)"
            case "iPhone9,2":    return "iPhone 7 Plus (GSM+CDMA)"
            case "iPhone9,3":    return "iPhone 7 (Global)"
            case "iPhone9,4":    return "iPhone 7 Plus (Global)"
                
            // iPod
            case "iPod1,1":      return "iPod Touch 1G"
            case "iPod2,1":      return "iPod Touch 2G"
            case "iPod3,1":      return "iPod Touch 3G"
            case "iPod4,1":      return "iPod Touch 4G"
            case "iPod5,1":      return "iPod Touch 5G"
            case "iPod6,1":      return "iPod Touch 6G"
                
            // iPad
            case "iPad1,1":      return "iPad 1"
            case "iPad2,1":      return "iPad 2 (WiFi)"
            case "iPad2,2":      return "iPad 2 (GSM)"
            case "iPad2,3":      return "iPad 2 (CDMA)"
            case "iPad2,4":      return "iPad 2 (WiFi)"
            case "iPad2,5":      return "iPad Mini 1 (WiFi)"
            case "iPad2,6":      return "iPad Mini 1 (GSM)"
            case "iPad2,7":      return "iPad Mini 1 (GSM+CDMA)"
            case "iPad3,1":      return "iPad 3 (WiFi)"
            case "iPad3,2":      return "iPad 3 (GSM+CDMA)"
            case "iPad3,3":      return "iPad 3 (GSM)"
            case "iPad3,4":      return "iPad 4 (WiFi)"
            case "iPad3,5":      return "iPad 4 (GSM)"
            case "iPad3,6":      return "iPad 4 (GSM+CDMA)"
            case "iPad4,1":      return "iPad Air 1 (WiFi)"
            case "iPad4,2":      return "iPad Air 1 (Cellular)"
            case "iPad4,3":      return "iPad Air"
            case "iPad4,4":      return "iPad Mini 2 (WiFi)"
            case "iPad4,5":      return "iPad Mini 2 (Cellular)"
            case "iPad4,6":      return "iPad Mini 2 (Rev)"
            case "iPad4,7":      return "iPad Mini 3 (WiFi)"
            case "iPad4,8":      return "iPad Mini 3 (A1600)"
            case "iPad4,9":      return "iPad Mini 3 (A1601)"
            case "iPad5,1":      return "iPad Mini 4 (WiFi)"
            case "iPad5,2":      return "iPad Mini 4 (Cellular)"
            case "iPad5,3":      return "iPad Air 2 (WiFi)"
            case "iPad5,4":      return "iPad Air 2 (Cellular)"
            case "iPad6,3":      return "iPad Pro 9.7 (WiFi)"
            case "iPad6,4":      return "iPad Pro 9.7 (Cellular)"
            case "iPad6,7":      return "iPad Pro 12.9 (WiFi)"
            case "iPad6,8":      return "iPad Pro 12.9 (Cellular)"
                
            case "i386":         return "Simulator"
            case "x86_64":       return "Simulator"
                
            default: return nil
            }
        }
    }
}
