//
//  TextField.swift
//  Malinka
//
//  Created by NUT.Tech on 08.02.2023.
//  Copyright © 2023 NUT.Tech. All rights reserved.
//

import SwiftUI
import Combine

/// Struct can be replaced to SwiftUI's native TextField after iOS 15.0.
/// It was created for access to firstResponder logic which has no analogue
/// until iOS 15.0 with @FocusState wrapper type and isFocused property of TextField.

public struct TextField: UIViewRepresentable {
    
    @ObservedObject
    public var viewModel: TextFieldViewModel
    public let font: UIFont
    public let textColor: UIColor

    // MARK: - Init
    
    public init(viewModel: TextFieldViewModel, font: UIFont, textColor: UIColor) {
        self.viewModel = viewModel
        self.font = font
        self.textColor = textColor
    }
    
    // MARK: - UIViewRepresentable
    
    public func makeCoordinator() -> UITextFieldDelegate {
        TextFieldCoordinator(viewModel: self.viewModel)
    }
    
    public func makeUIView(context: Context) -> UITextField {
        let view = UITextField()
        view.autocapitalizationType = .none
        view.autocorrectionType = .no
        view.clearButtonMode = .never
        view.font = font
        view.textColor = self.textColor
        view.keyboardType = self.viewModel.keyboardType
        view.placeholder = self.viewModel.placeholder
        view.addTarget(context.coordinator,
                       action: #selector(TextFieldCoordinator.textViewDidChange),
                       for: .editingChanged)
        view.delegate = context.coordinator
        return view
    }
    
    public func updateUIView(_ uiView: UITextField, context: Context) {
        uiView.text = self.viewModel.text
        self.viewModel.isFirstResponder
            ? uiView.becomeFirstResponder()
            : uiView.resignFirstResponder()
    }
}