//
//  BreadcrumbCellItem.swift
//  VDS
//
//  Created by Kanamarlapudi, Vasavi on 11/03/24.
//

import UIKit
import VDSColorTokens

///This is customised view for Breadcrumb cell item
final class BreadcrumbCellItem: UICollectionViewCell {
    
    ///Identifier for the BreadcrumbCellItem
    static let identifier: String = String(describing: BreadcrumbCellItem.self)
    
    //--------------------------------------------------
    // MARK: - Private Properties
    //--------------------------------------------------
    internal var crumbWidthConstraint: NSLayoutConstraint?

    var crumb : BreadcrumbItem? {
        didSet {
            guard let crumb = crumb else { return }
            breadcrumb = crumb
            crumbWidthConstraint?.constant = crumb.intrinsicContentSize.width
            crumbWidthConstraint?.isActive = true
        }
    }
    
    internal var stackView: UIStackView = {
        return UIStackView().with {
            $0.translatesAutoresizingMaskIntoConstraints = false
            $0.axis = .horizontal
            $0.distribution = .fill
            $0.alignment = .top
            $0.spacing = VDSLayout.Spacing.space1X.value
        }
    }()
    
    internal var breadcrumb = BreadcrumbItem().with {
        $0.translatesAutoresizingMaskIntoConstraints = false
        $0.titleLabel?.numberOfLines = 0
    }
    
    ///separator label
    private var separator: Label = Label().with {
        $0.translatesAutoresizingMaskIntoConstraints = false
        $0.textAlignment = .left
        $0.numberOfLines = 0
        $0.text = "/"
    }
    
    private let textColorConfiguration = SurfaceColorConfiguration(VDSColor.elementsPrimaryOnlight, VDSColor.elementsPrimaryOndark)
   
    private var crumbTextColorConfiguration = ControlColorConfiguration().with {
        $0.setSurfaceColors(VDSColor.elementsPrimaryOnlight, VDSColor.elementsPrimaryOndark, forState: .normal)
        $0.setSurfaceColors(VDSColor.interactiveActiveOnlight, VDSColor.interactiveActiveOndark, forState: .highlighted)
        $0.setSurfaceColors(VDSColor.elementsPrimaryOnlight, VDSColor.elementsPrimaryOndark, forState: .selected)
    }
    
    //--------------------------------------------------
    // MARK: - Initializers
    //--------------------------------------------------
    override init(frame: CGRect) {
        super.init(frame: frame)
        setUp()
    }
    
    required init?(coder: NSCoder) {
        super.init(coder: coder)
        setUp()
    }
    
    ///Configuring the cell with default setup
    private func setUp() {
        //add stackview - this is the horizontal stack that contains breadcrumb and separator
        stackView.addArrangedSubview(breadcrumb)
        crumbWidthConstraint = breadcrumb.widthAnchor.constraint(greaterThanOrEqualToConstant: 0).activate()
        stackView.addArrangedSubview(separator)
        stackView.setCustomSpacing(VDSLayout.Spacing.space1X.value, after: breadcrumb)
        stackView.pinToSuperView()
        contentView.addSubview(stackView)
        separator.backgroundColor = .clear
    }
    
    ///Updating UI based on selected index, current index along with surface
    func update(surface: Surface, hideSlash: Bool, breadCrumbItem: BreadcrumbItem) {
        breadcrumb = breadCrumbItem
        breadcrumb.text = breadCrumbItem.text
        separator.textColor = textColorConfiguration.getColor(surface)
        separator.isHidden = hideSlash
        print("selected: \(breadcrumb.isSelected), hideSlash: \(hideSlash), text: \(String(describing: breadCrumbItem.text)))")
    }
}