//
//  PaginationButton.swift
//  VDS
//
//  Created by Bandaru, Krishna Kishore on 05/03/24.
//

import UIKit
import VDSColorTokens

open class PaginationButton: ButtonBase {
    
    private let buttonTintColorConfiguration = SurfaceColorConfiguration(VDSColor.paletteBlack, VDSColor.paletteWhite)
    private let buttonTextColorConfiguration = SurfaceColorConfiguration(VDSColor.paletteBlack, VDSColor.paletteWhite)

    @available(iOS 15.0, *)
    var buttonConfiguration: Button.Configuration {
        var configuration = ButtonBase.Configuration.plain()
        configuration.imagePadding = VDSLayout.Spacing.space2X.value
        configuration.imagePlacement = type == .next ? .trailing : .leading
        configuration.titleAlignment =  type == .next ? .trailing : .leading
        configuration.contentInsets = .zero
        return configuration
    }
    
    open override var textStyle: TextStyle { TextStyle.boldBodySmall }
    
    open override var textColor: UIColor { buttonTextColorConfiguration.getColor(surface) }
    
    private var type: Type = .next
    
    init(type: Type) {
        self.type = type
        super.init()
    }
    
    required public init() {
        super.init()
    }
    
    public required init?(coder: NSCoder) {
        super.init(coder: coder)
    }
    
    open override func initialSetup() {
        super.initialSetup()
        if #available(iOS 15.0, *) {
            configuration = buttonConfiguration
        } else {
            semanticContentAttribute = type == .next ? .forceRightToLeft : .forceLeftToRight
            imageEdgeInsets = .init(top: 0, left: 0, bottom: 0, right: VDSLayout.Spacing.space2X.value)
        }
        contentHorizontalAlignment = type == .next ? .trailing : .leading
    }
    
    open override func updateView() {
        text = type.title
        setImage(type.image, for: .normal)
        tintColor = buttonTintColorConfiguration.getColor(surface)
        super.updateView()
    }
}

extension PaginationButton {
    
    enum `Type` {
        case previous, next
        
        var title: String {
            switch self {
            case .next:
                "Next"
            case .previous:
                "Previous"
            }
        }
        
        var image: UIImage? {
            switch self {
            case .previous:
                BundleManager.shared.image(for: "pagination-arrow-left")?.withRenderingMode(.alwaysTemplate)
            case .next:
                BundleManager.shared.image(for: "pagination-arrow-right")?.withRenderingMode(.alwaysTemplate)
            }
        }
    }
}