// SPDX-License-Identifier: MIT
// Copyright © 2018 WireGuard LLC. All Rights Reserved.

import UIKit

class TunnelEditReadOnlyKeyValueCell: CopyableLabelTableViewCell {
    var key: String {
        get { return keyLabel.text ?? "" }
        set(value) { keyLabel.text = value }
    }
    var value: String {
        get { return valueLabel.text }
        set(value) { valueLabel.text = value }
    }
    
    override var textToCopy: String? {
        return valueLabel.text
    }
    
    let keyLabel: UILabel = {
        let keyLabel = UILabel()
        keyLabel.font = UIFont.preferredFont(forTextStyle: .body)
        keyLabel.adjustsFontForContentSizeCategory = true
        keyLabel.textColor = .gray
        return keyLabel
    }()
    
    let valueLabel: ScrollableLabel = {
        let valueLabel = ScrollableLabel()
        valueLabel.label.font = UIFont.preferredFont(forTextStyle: .body)
        valueLabel.label.adjustsFontForContentSizeCategory = true
        valueLabel.textColor = .gray
        return valueLabel
    }()
    
    override init(style: UITableViewCell.CellStyle, reuseIdentifier: String?) {
        super.init(style: style, reuseIdentifier: reuseIdentifier)
        
        contentView.addSubview(keyLabel)
        keyLabel.translatesAutoresizingMaskIntoConstraints = false
        keyLabel.textAlignment = .right
        let widthRatioConstraint = NSLayoutConstraint(item: keyLabel, attribute: .width,
                                                      relatedBy: .equal,
                                                      toItem: self, attribute: .width,
                                                      multiplier: 0.4, constant: 0)
        // In case the key doesn't fit into 0.4 * width,
        // so set a CR priority > the 0.4-constraint's priority.
        widthRatioConstraint.priority = .defaultHigh + 1
        keyLabel.setContentCompressionResistancePriority(.defaultHigh + 2, for: .horizontal)
        NSLayoutConstraint.activate([
            keyLabel.centerYAnchor.constraint(equalTo: contentView.centerYAnchor),
            keyLabel.leftAnchor.constraint(equalTo: contentView.layoutMarginsGuide.leftAnchor),
            widthRatioConstraint
        ])
        
        contentView.addSubview(valueLabel)
        valueLabel.translatesAutoresizingMaskIntoConstraints = false
        NSLayoutConstraint.activate([
            valueLabel.centerYAnchor.constraint(equalTo: contentView.centerYAnchor),
            valueLabel.leftAnchor.constraint(equalToSystemSpacingAfter: keyLabel.rightAnchor, multiplier: 1),
            valueLabel.rightAnchor.constraint(equalTo: contentView.layoutMarginsGuide.rightAnchor)
        ])
    }
    
    required init?(coder aDecoder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    override func prepareForReuse() {
        super.prepareForReuse()
        key = ""
        value = ""
    }
}