//
//  SettingEnableTableViewCell.swift
//  Earthquake Network
//
//  Created by Busi Andrea on 25/08/2020.
//  Copyright © 2020 Earthquake Network. All rights reserved.
//

import UIKit

class SettingEnableTableViewCell: UITableViewCell {

    static let Identifier = "EnableCell"
    
    var valueChanged: ((Bool) -> Void)?
    var isDisabled: Bool = false {
        didSet {
            updateUI()
        }
    }
    
    // MARK: - Properties
    
    lazy var titleLabel: UILabel = {
        let label = UILabel()
        label.translatesAutoresizingMaskIntoConstraints = false
        label.numberOfLines = 0
        label.font = UIFont.preferredFont(forTextStyle: .body)
        return label
    }()
    
    lazy var descriptionLabel: UILabel = {
        let label = UILabel()
        label.translatesAutoresizingMaskIntoConstraints = false
        label.numberOfLines = 0
        label.font = UIFont.preferredFont(forTextStyle: .subheadline)
        return label
    }()
    
    lazy var toggleSwitch: UISwitch = {
        let toggle = UISwitch()
        toggle.setContentHuggingPriority(.required, for: .horizontal)
        toggle.setContentCompressionResistancePriority(.required, for: .horizontal)
        toggle.addTarget(self, action: #selector(toggleChanged(_:)), for: .valueChanged)
        return toggle
    }()
    
    lazy var errorLabel: UILabel = {
        let label = UILabel()
        label.translatesAutoresizingMaskIntoConstraints = false
        label.numberOfLines = 0
        label.font = UIFont.preferredFont(forTextStyle: .subheadline)
        label.textColor = AppTheme.Colors.red
        label.text = nil
        return label
    }()
    
    // MARK: - Init
    
    override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
        setupUI()
    }
    
    required init?(coder: NSCoder) {
        super.init(coder: coder)
        setupUI()
    }

    // MARK: - Private
    
    private func setupUI() {
        selectionStyle = .none

        let stackView = UIStackView()
        stackView.translatesAutoresizingMaskIntoConstraints = false
        stackView.axis = .horizontal
        stackView.distribution = .fill
        stackView.alignment = .center
        stackView.spacing = 8
        
        stackView.addArrangedSubview(titleLabel)
        stackView.addArrangedSubview(toggleSwitch)
        
        contentView.addSubview(stackView)
        contentView.addSubview(descriptionLabel)
        contentView.addSubview(errorLabel)
        
        stackView.topAnchor.constraint(equalTo: contentView.layoutMarginsGuide.topAnchor).isActive = true
        stackView.trailingAnchor.constraint(equalTo: contentView.layoutMarginsGuide.trailingAnchor).isActive = true
        stackView.leadingAnchor.constraint(equalTo: contentView.layoutMarginsGuide.leadingAnchor).isActive = true
        
        descriptionLabel.topAnchor.constraint(equalTo: stackView.bottomAnchor, constant: 8).isActive = true
        descriptionLabel.trailingAnchor.constraint(equalTo: stackView.trailingAnchor).isActive = true
        descriptionLabel.leadingAnchor.constraint(equalTo: stackView.leadingAnchor).isActive = true
        //descriptionLabel.bottomAnchor.constraint(equalTo: contentView.layoutMarginsGuide.bottomAnchor).isActive = true
        
        errorLabel.topAnchor.constraint(equalTo: descriptionLabel.bottomAnchor, constant: 8.0).isActive = true
        errorLabel.trailingAnchor.constraint(equalTo: descriptionLabel.trailingAnchor).isActive = true
        errorLabel.leadingAnchor.constraint(equalTo: descriptionLabel.leadingAnchor).isActive = true
        errorLabel.bottomAnchor.constraint(equalTo: contentView.layoutMarginsGuide.bottomAnchor).isActive = true
    }
    
    private func updateUI() {
        toggleSwitch.isEnabled = !isDisabled
        titleLabel.textColor = isDisabled ? .lightGray : .black
        descriptionLabel.textColor = isDisabled ? .lightGray : .black
    }
    
    // MARK: - Action
    
    @objc private func toggleChanged(_ sender: UISwitch) {
        valueChanged?(sender.isOn)
    }
}