//
//  RadioButton.swift
//  VDS
//
//  Created by Matt Bruce on 6/5/23.
//

import Foundation
import UIKit
import Combine
import VDSColorTokens
import VDSFormControlsTokens

@objc(VDSRadioButton)
open class RadioButton: SelectorBase {
    
    open var selectedSize = CGSize(width: 10, height: 10) { didSet { setNeedsUpdate() }}
    
    open override func setup() {
        super.setup()
        
        backgroundColorConfig.setSurfaceColors(VDSColor.feedbackErrorBackgroundOnlight, VDSColor.feedbackErrorBackgroundOndark, forState: .error)
        
        borderColorConfig.setSurfaceColors(VDSColor.elementsPrimaryOnlight, VDSColor.elementsPrimaryOndark, forState: .selected)
        borderColorConfig.setSurfaceColors(VDSColor.elementsPrimaryOnlight, VDSColor.elementsPrimaryOndark, forState: .highlighted)
        borderColorConfig.setSurfaceColors(VDSFormControlsColor.borderOnlight, VDSFormControlsColor.borderOndark, forState: .normal)
        borderColorConfig.setSurfaceColors(VDSColor.interactiveDisabledOnlight, VDSColor.interactiveDisabledOndark, forState: .disabled)
        borderColorConfig.setSurfaceColors(VDSColor.feedbackErrorOnlight, VDSColor.feedbackErrorOndark, forState: .error)
        
        selectorColorConfig.setSurfaceColors(VDSColor.elementsPrimaryOnlight, VDSColor.elementsPrimaryOndark, forState: .selected)
        selectorColorConfig.setSurfaceColors(VDSColor.interactiveDisabledOnlight, VDSColor.interactiveDisabledOndark, forState: [.selected, .disabled])
        
    }
    
    open override func layoutSubviews() {
        super.layoutSubviews()
        
        //get the colors
        let backgroundColor = backgroundColorConfig.getColor(self)
        let borderColor = borderColorConfig.getColor(self)
        let selectorColor = selectorColorConfig.getColor(self)

        if let shapeLayer = shapeLayer, let sublayers = layer.sublayers, sublayers.contains(shapeLayer) {
            shapeLayer.removeFromSuperlayer()
            self.shapeLayer = nil
        }
        
        let bounds = bounds
        
        self.backgroundColor = backgroundColor
        layer.borderColor = borderColor.cgColor
        layer.cornerRadius = bounds.width * 0.5
        layer.borderWidth = VDSFormControls.widthBorder
        
        if shapeLayer == nil {
            let selectedBounds = selectedSize
            let bezierPath = UIBezierPath(ovalIn: CGRect(x: (bounds.width - selectedBounds.width) / 2,
                                                         y: (bounds.height - selectedBounds.height) / 2,
                                                         width: selectedSize.width,
                                                         height: selectedSize.height))
            let shapeLayer = CAShapeLayer()
            self.shapeLayer = shapeLayer
            shapeLayer.frame = bounds
            layer.addSublayer(shapeLayer)
            shapeLayer.fillColor = selectorColor.cgColor
            shapeLayer.path = bezierPath.cgPath
        }
    }
}