//
//  Dropshadowable.swift
//  VDS
//
//  Created by Bandaru, Krishna Kishore on 16/02/24.
//

import Foundation
import UIKit

protocol Dropshadowable {
    
    var shadowColorConfiguration: AnyColorable { get set }
    var shadowOpacity: CGFloat { get set }
    var shadowOffset: CGSize { get set }
    var shadowRadius: CGFloat { get set }
}

extension ViewProtocol where Self: UIView {
    
    func addDropShadow(_ config: Dropshadowable) {
        removeDropShadows()
        layer.backgroundColor = backgroundColor?.cgColor
        layer.masksToBounds = false
        let shadowPath = UIBezierPath(roundedRect: bounds, cornerRadius: layer.cornerRadius)
        let shadowLayer = CALayer()
        shadowLayer.shadowPath = shadowPath.cgPath
        shadowLayer.frame = bounds
        shadowLayer.position = center
        shadowLayer.backgroundColor = UIColor.clear.cgColor
        shadowLayer.cornerRadius = layer.cornerRadius
        shadowLayer.shadowColor =  config.shadowColorConfiguration.getColor(self).cgColor
        shadowLayer.shadowOpacity = Float(config.shadowOpacity)
        shadowLayer.shadowOffset = .init(width: config.shadowOffset.width, height: config.shadowOffset.height)
        shadowLayer.shadowRadius = config.shadowRadius
        shadowLayer.name = "dropShadowLayer"
        shadowLayer.shouldRasterize = true
        shadowLayer.rasterizationScale = UIScreen.main.scale
        layer.insertSublayer(shadowLayer, at: 0)
    }
    
    func removeDropShadows() {
        layer.sublayers?.removeAll { $0.name == "dropShadowLayer" }
    }
    
    func addGradientLayer(with firstColor: UIColor, secondColor: UIColor) {
        removeGradientLayer()
        let gradientLayer = CAGradientLayer()
        gradientLayer.frame = bounds
        gradientLayer.startPoint = CGPoint(x: 0, y: 1)
        gradientLayer.endPoint = CGPoint(x: 1, y: 0)
        gradientLayer.position = center
        gradientLayer.shouldRasterize = true
        gradientLayer.rasterizationScale = UIScreen.main.scale
        gradientLayer.cornerRadius = layer.cornerRadius
        gradientLayer.colors = [firstColor.cgColor, secondColor.cgColor]
        gradientLayer.name = "gradientLayer"
        layer.insertSublayer(gradientLayer, at: 0)
    }
    
    func removeGradientLayer() {
        layer.sublayers?.removeAll { $0.name == "gradientLayer" }
    }
}