//
//  PollVoteButton.swift
//  Tusker
//
//  Created by Shadowfacts on 5/1/22.
//  Copyright © 2022 Shadowfacts. All rights reserved.
//

import UIKit

/// Wraps a UILabel and UIButton to allow setting disabled titles on Catalyst, where `setTitle(_:for:)` only works for the normal state.
class PollVoteButton: UIView {

    var disabledTitle: String = "" {
        didSet {
            update()
        }
    }
    var isEnabled = true {
        didSet {
            update()
        }
    }
    
    private var button = UIButton(type: .system)
    #if targetEnvironment(macCatalyst)
    private var label = UILabel()
    #endif
    
    override init(frame: CGRect) {
        super.init(frame: frame)
        
        button.translatesAutoresizingMaskIntoConstraints = false
        button.setTitleColor(.secondaryLabel, for: .disabled)
        button.contentHorizontalAlignment = .trailing
        embedSubview(button)
        #if targetEnvironment(macCatalyst)
        label.textColor = .secondaryLabel
        label.translatesAutoresizingMaskIntoConstraints = false
        label.textAlignment = .right
        embedSubview(label)
        #endif
        
        update()
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    func addTarget(_ target: Any, action: Selector) {
        button.addTarget(target, action: action, for: .touchUpInside)
    }
    
    func setFont(_ font: UIFont) {
        button.titleLabel!.font = font
        #if targetEnvironment(macCatalyst)
        label.font = font
        #endif
    }
    
    private func update() {
        button.isEnabled = isEnabled
        if isEnabled {
            #if targetEnvironment(macCatalyst)
            label.isHidden = true
            button.isHidden = false
            #endif
            button.setTitle("Vote", for: .normal)
        } else {
            #if targetEnvironment(macCatalyst)
            label.text = disabledTitle
            label.isHidden = false
            button.isHidden = true
            #else
            button.setTitle(disabledTitle, for: .disabled)
            #endif
        }
    }

}