//
//  ConnectionHelper.swift
//  Sirani
//
//  Created by Anhar Solehudin on 31/03/19.
//  Copyright © 2019 Anhar Solehudin. All rights reserved.
//

import SystemConfiguration
import Foundation
import UIKit

class ConnectionHelper {

    class func isConnectedToNetwork() -> Bool {
        
        var zeroAddress = sockaddr_in(sin_len: 0, sin_family: 0, sin_port: 0, sin_addr: in_addr(s_addr: 0), sin_zero: (0, 0, 0, 0, 0, 0, 0, 0))
        zeroAddress.sin_len = UInt8(MemoryLayout.size(ofValue: zeroAddress))
        zeroAddress.sin_family = sa_family_t(AF_INET)
        
        let defaultRouteReachability = withUnsafePointer(to: &zeroAddress) {
            $0.withMemoryRebound(to: sockaddr.self, capacity: 1) {zeroSockAddress in
                SCNetworkReachabilityCreateWithAddress(nil, zeroSockAddress)
            }
        }
        
        var flags: SCNetworkReachabilityFlags = SCNetworkReachabilityFlags(rawValue: 0)
        if SCNetworkReachabilityGetFlags(defaultRouteReachability!, &flags) == false {
            return false
        }
        
        /* Only Working for WIFI
         let isReachable = flags == .reachable
         let needsConnection = flags == .connectionRequired
         
         return isReachable && !needsConnection
         */
        
        // Working for Cellular and WIFI
        let isReachable = (flags.rawValue & UInt32(kSCNetworkFlagsReachable)) != 0
        let needsConnection = (flags.rawValue & UInt32(kSCNetworkFlagsConnectionRequired)) != 0
        let isConnect = (isReachable && !needsConnection)
        
        return isConnect
    }
    
    class func checkIpAddress(completion: @escaping (Bool) -> Void) {
        if let url = URL(string: "https://ipinfo.io/json") {
            let task = URLSession.shared.dataTask(with: url) { (data, response, error) in
                if let error = error {
                    print("Error when checking location: \(error.localizedDescription)")
                    completion(false)
                    return
                }

                if let data = data {
                    do {
                        let json = try JSONSerialization.jsonObject(with: data, options: [])
                        if let dict = json as? [String: Any], let country = dict["country"] as? String {
                            print("IP Country: \(country)")
                            if country != "ID" {
                                completion(false)
                            } else {
                                completion(true)
                            }
                        } else {
                            completion(false)
                        }
                    } catch {
                        print("Error when checking location: \(error.localizedDescription)")
                        completion(false)
                    }
                } else {
                    completion(false)
                }
            }
            task.resume()
        } else {
            completion(false)
        }
    }
}