//
//  BreadcrumbItem.swift
//  VDS
//
//  Created by Kanamarlapudi, Vasavi on 05/03/24.
//

import Foundation
import UIKit
import VDSTokens
import Combine

/// A Breadcrumb Item contains href(link) and selected flag.
/// Breadcrumb links to its respective page if it is not disabled.
/// Breadcrumb contains text with a separator by default, highlights text in bold without a separator if selected.
@objc (VDSBreadcrumbItem)
open class BreadcrumbItem: ButtonBase {
   
    //--------------------------------------------------
    // MARK: - Initializers
    //--------------------------------------------------
    required public init() {
        super.init(frame: .zero)
    }
    
    public override init(frame: CGRect) {
        super.init(frame: .zero)
    }
    
    public required init?(coder: NSCoder) {
        super.init(coder: coder)
    }
    
    //--------------------------------------------------
    // MARK: - Public Properties
    //--------------------------------------------------
    /// TextStyle used on the titleLabel.
    open override var textStyle: TextStyle { isSelected ? TextStyle.boldBodySmall : TextStyle.bodySmall }
            
    /// UIColor used on the titleLabel text.
    open override var textColor: UIColor {
        textColorConfiguration.getColor(self)
    }
        
    /// The natural size for the receiving view, considering only properties of the view itself.
    open override var intrinsicContentSize: CGSize {
        guard let titleLabel else { return super.intrinsicContentSize }
        // Calculate the titleLabel's intrinsic content size
        let labelSize = titleLabel.sizeThatFits(CGSize(width: self.frame.width, height: CGFloat.greatestFiniteMagnitude))
        // Adjust the size if needed (add any additional padding if your design requires)
        let adjustedSize = CGSize(width: labelSize.width + contentEdgeInsets.left + contentEdgeInsets.right,
                                  height: labelSize.height + contentEdgeInsets.top + contentEdgeInsets.bottom)
        return adjustedSize
    }

    //--------------------------------------------------
    // MARK: - Private Properties
    //--------------------------------------------------
    private var textColorConfiguration = ControlColorConfiguration().with {
        $0.setSurfaceColors(VDSColor.elementsPrimaryOnlight, VDSColor.elementsPrimaryOndark, forState: .normal)
        $0.setSurfaceColors(VDSColor.interactiveActiveOnlight, VDSColor.interactiveActiveOndark, forState: .disabled)
        $0.setSurfaceColors(VDSColor.interactiveActiveOnlight, VDSColor.interactiveActiveOndark, forState: .highlighted)
        $0.setSurfaceColors(VDSColor.elementsPrimaryOnlight, VDSColor.elementsPrimaryOndark, forState: .selected)
    }
          
    //--------------------------------------------------
    // MARK: - Overrides
    //--------------------------------------------------
    /// Called once when a view is initialized and is used to Setup additional UI or other constants and configurations.
    open override func setup() {
        super.setup()
        isAccessibilityElement = true
        accessibilityTraits = .link
        contentHorizontalAlignment = .leading
    }

    /// Used to make changes to the View based off a change events or from local properties.
    open override func updateView() {
        //always call last so the label is rendered
        super.updateView()

    }

    /// Resets to default settings.
    open override func reset() {
        super.reset()
        shouldUpdateView = false
        text = nil
        accessibilityCustomActions = []
        isAccessibilityElement = true
        accessibilityTraits = .button
        shouldUpdateView = true
        setNeedsUpdate()
    }
    
    /// Used to update any Accessibility properties.
    open override func updateAccessibility() {
        super.updateAccessibility()
        accessibilityLabel = text
    }
    
}