//
//  RadioButtonGroup.swift
//  VDS
//
//  Created by Matt Bruce on 8/11/22.
//

import Foundation
import UIKit

@objc(VDSRadioButtonGroup)
public class RadioButtonGroup: SelectorGroupSelectedHandlerBase<RadioButton> {
    
    //--------------------------------------------------
    // MARK: - Public Properties
    //--------------------------------------------------
    public override var selectorViews: [RadioButton] {
        didSet {
            for selector in selectorViews {
                if !mainStackView.arrangedSubviews.contains(selector) {
                    selector.onClick = { [weak self] handler in
                        self?.didSelect(handler)
                    }
                    mainStackView.addArrangedSubview(selector)
                }
            }
        }
    }

    private var _showError: Bool = false
    public var showError: Bool {
        get { _showError }
        set {
            var newShowError = newValue
            if selectedHandler != nil, newShowError {
                newShowError = false
            }
            selectorViews.forEach { handler in
                handler.showError = newShowError
            }
            _showError = newShowError
        }
    }
    
    //--------------------------------------------------
    // MARK: - Private Properties
    //--------------------------------------------------
    private var mainStackView: UIStackView = {
        return UIStackView().with {
            $0.translatesAutoresizingMaskIntoConstraints = false
            $0.alignment = .fill
            $0.distribution = .fill
            $0.axis = .vertical
            $0.spacing = 10
        }
    }()
    
    //--------------------------------------------------
    // MARK: - Overrides
    //--------------------------------------------------
    open override func setup() {
        super.setup()
        
        isAccessibilityElement = true
        accessibilityTraits = .button
        addSubview(mainStackView)
        
        mainStackView.pinToSuperView()
    }
    
    public override func didSelect(_ selectedControl: RadioButton) {
        if let selectedHandler {
            updateToggle(selectedHandler)
        }
        updateToggle(selectedControl)
        if showError {
            showError = false
        }
        valueChanged()
    }
    
    private func updateToggle(_ radioButton: RadioButton) {
        if radioButton.showError && radioButton.isSelected == false {
            radioButton.showError.toggle()
        }
        radioButton.isSelected.toggle()
    }
}