import UIKit

class DatePicker: UIViewController {

    lazy var contentView: UIView = {
        let view = UIView()
        return view
    }()

    lazy var txtDatePicker: UITextField = {
        let txt = UITextField()
        return txt
    }()

    let datePicker = UIDatePicker()

    override func viewDidLoad() {
        super.viewDidLoad()
        setupView()
        showDatePicker()

    }

    private func setupView(){
        view.backgroundColor = UIColor.white

        view.addSubview(contentView)
        view.addSubview(txtDatePicker)

        contentView.snp.makeConstraints { (maker) in
            maker.top.equalTo(view.safeAreaLayoutGuide.snp.top)
            maker.bottom.equalTo(view.safeAreaLayoutGuide.snp.bottom)
            maker.right.left.equalToSuperview()
        }

        txtDatePicker.snp.makeConstraints { (maker) in
            maker.top.equalTo(contentView).offset(20)
            maker.right.left.equalToSuperview()
        }

    }

    func showDatePicker(){

        //Formate Date
        datePicker.datePickerMode = .date

        //ToolBar
        let toolbar = UIToolbar();
        toolbar.sizeToFit()
        let doneButton = UIBarButtonItem(title: "Done", style: .plain, target: self, action: #selector(doneDatePicker));
        let spaceButton = UIBarButtonItem(barButtonSystemItem: UIBarButtonItem.SystemItem.flexibleSpace, target: nil, action: nil)
        let cancelButton = UIBarButtonItem(title: "Cancel", style: .plain, target: self, action: #selector(cancelDatePicker));

        toolbar.setItems([cancelButton,spaceButton,doneButton], animated: false)

        txtDatePicker.inputAccessoryView = toolbar
        txtDatePicker.inputView = datePicker

    }

    @objc func doneDatePicker(){

        let formatter = DateFormatter()
        formatter.dateFormat = "dd/MM/yyyy"
        txtDatePicker.text = formatter.string(from: datePicker.date)
        self.view.endEditing(true)
    }

    @objc func cancelDatePicker(){
        self.view.endEditing(true)
    }
}