Attractor/App/Script Policy UI/ScriptPolicyControl.swift

//
//  ScriptPolicyControl.swift
//  SBrowser
//
//  Created by James Magahern on 7/24/20.
//

import UIKit

class ScriptPolicyControl: UIControl
{
    enum PolicyStatus {
        case allowed
        case blocked
    }
    
    var policyStatus: PolicyStatus = .blocked {
        didSet { setNeedsLayout() }
    }
    
    private let allowButton = ReliefButton()
    private let denyButton = ReliefButton()
    private let segmentContainer = SegmentedReliefButton(children: [])
    
    convenience init() {
        self.init(frame: .zero)
        
        segmentContainer.children = [ allowButton, denyButton ]
        addSubview(segmentContainer)
        
        allowButton.showsTouchWhenHighlighted = false
        allowButton.addAction(UIAction(handler: { [unowned self] _ in
            self.policyStatus = .allowed
            self.sendActions(for: .valueChanged)
        }), for: .touchUpInside)
        allowButton.imageView?.contentMode = .scaleAspectFit
        
        denyButton.showsTouchWhenHighlighted = false
        denyButton.addAction(UIAction(handler: { [unowned self] _ in
            self.policyStatus = .blocked
            self.sendActions(for: .valueChanged)
        }), for: .touchUpInside)
        denyButton.imageView?.contentMode = .scaleAspectFit
    }
    
    override var intrinsicContentSize: CGSize {
        CGSize(width: 100.0, height: UIView.noIntrinsicMetric)
    }
    
    override func layoutSubviews() {
        super.layoutSubviews()
        
        segmentContainer.frame = bounds
        
        if policyStatus == .allowed {
            allowButton.tintColor = .blue
            allowButton.remainsPressed = true
            allowButton.setImage(UIImage(systemName: "play.circle.fill"), for: .normal)
            
            denyButton.tintColor = nil
            denyButton.remainsPressed = false
            denyButton.setImage(UIImage(systemName: "stop.circle"), for: .normal)
        } else {
            allowButton.tintColor = nil
            allowButton.remainsPressed = false
            allowButton.setImage(UIImage(systemName: "play.circle"), for: .normal)
            
            denyButton.tintColor = .red
            denyButton.remainsPressed = true
            denyButton.setImage(UIImage(systemName: "stop.circle.fill"), for: .normal)
        }
    }
}