/*
Copyright 2019-2024 New Vector Ltd.

SPDX-License-Identifier: AGPL-3.0-only
Please see LICENSE in the repository root for full details.
 */

import UIKit

class ReactionsMenuButton: UIButton, Themable {

    // MARK: - Constants
    
    private enum Constants {
        static let borderWidthSelected: CGFloat = 1/UIScreen.main.scale
        static let borderColorAlpha: CGFloat = 0.15
    }
    
    // MARK: - Properties

    private var theme: Theme!

    // MARK: - Setup

    required init?(coder aDecoder: NSCoder) {
        super.init(coder: aDecoder)
        self.commonInit()
    }

    override init(frame: CGRect) {
        super.init(frame: frame)
        self.commonInit()
    }

    // MARK: - Life cycle

    override func layoutSubviews() {
        super.layoutSubviews()
        self.layer.cornerRadius = self.frame.size.height / 3
        self.layer.borderWidth = self.isSelected ? Constants.borderWidthSelected : 0
    }

    // MARK: - Private

    private func commonInit() {
        self.layer.masksToBounds = true

        self.update(theme: ThemeService.shared().theme)

        customizeViewRendering()
        updateView()
    }

    private func customizeViewRendering() {
        self.tintColor = UIColor.clear
    }

    func update(theme: Theme) {
        self.theme = theme
        
        self.setTitleColor(self.theme.textPrimaryColor, for: .normal)
        self.setTitleColor(self.theme.textPrimaryColor, for: .selected)

        self.layer.borderColor = self.theme.tintColor.withAlphaComponent(Constants.borderColorAlpha).cgColor
    }

    private func updateView() {
        backgroundColor = isSelected ? self.theme.tintBackgroundColor : UIColor.clear
    }

    override open var isSelected: Bool {
        didSet {
            self.updateView()
        }
    }
}