import ContactsUI
import UIKit

class ViewController: UIViewController, CNContactPickerDelegate {
  override func viewDidLoad() {
        super.viewDidLoad()

       openAddressbook(vc: ViewController())
  }

  //MARK:- CNContactPickerDelegate Method

    var contactStore = CNContactStore()

    func requestForAccess(completionHandler: @escaping (_ accessGranted: Bool) -> Void) {
        let authorizationStatus = CNContactStore.authorizationStatus(for: CNEntityType.contacts)

        switch authorizationStatus {
        case .authorized:
            completionHandler(true)

        case .denied, .notDetermined:
            self.contactStore.requestAccess(for: CNEntityType.contacts, completionHandler: { (access, accessError) -> Void in
                if access {
                    completionHandler(access)
                }
                else {
                    if authorizationStatus == CNAuthorizationStatus.denied {
                        let message = "\(accessError!.localizedDescription)\n\nPlease allow the app to access your contacts through the Settings."
                        print(message);
                    }
                }
            })

        default:
            completionHandler(false)
        }
    }

    func openAddressbook(vc: UIViewController){
        requestForAccess { (accessGranted) in
            if accessGranted == true{
                let cnPicker = CNContactPickerViewController()
                cnPicker.delegate = self
                self.present(cnPicker, animated: true, completion: nil)
            }
        }
    }

    func contactPicker(_ picker: CNContactPickerViewController, didSelect contact: CNContact) {
        if contact.isKeyAvailable(CNContactPhoneNumbersKey){
            // handle the selected contact
           firstNameField.text = contact.givenName
           middleNameField.text = contact.middleName
           lastNameField.text = contact.familyName

            var numberArray = [String]()
            for number in contact.phoneNumbers {
                let phoneNumber = number.value
                numberArray.append(phoneNumber.stringValue)
            }
            if numberArray.count > 0 {
                cellPhoneField.text = numberArray[0]
                if numberArray.count > 1 {
                    officeNumberField.text = numberArray[1]
                    if numberArray.count > 2 {
                        homeNumberField.text = numberArray[2]
                    }
                }
            }
            // Set the contact's home email address.
            var homeEmailAddress: String!
            for emailAddress in contact.emailAddresses {
                if emailAddress.label == CNLabelHome {
                    homeEmailAddress = emailAddress.value as String
                    break
                }
            }

            if homeEmailAddress != nil {
                emailField.text = homeEmailAddress
            }

            if contact.isKeyAvailable(CNContactPostalAddressesKey) {
                if let postalAddress = contact.postalAddresses.first?.value {
//                    self.addressStreet.text = CNPostalAddressFormatter().string(from: postalAddress)
                    self.addressStreet.text = postalAddress.street
                    self.addressCity.text = postalAddress.city
                    self.addressZip.text = postalAddress.postalCode
                    self.addressState.text = postalAddress.state
                }
            }

           companyCategoryField.text = "PersonalContact"
           companycategory = 3

        }
    }

    func contactPickerDidCancel(picker: CNContactPickerViewController) {
        print("Cancelled picking a contact")
    }
}