//
//  TrailingTooltipLabel.swift
//  VDS
//
//  Created by Matt Bruce on 4/14/23.
//

import Foundation
import UIKit
import Combine

/// A trailing tooltip is view that contains a label that has a tooltip overlay
/// applied at the last character of the text.
@objc(VDSTrailingTooltipLabel)
open class TrailingTooltipLabel: View, TooltipLaunchable {
    
    //--------------------------------------------------
    // 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
    //--------------------------------------------------
    /// Label used to render the label text.
    open var label = Label()
    
    /// Text used to render the label.
    open var labelText: String? { didSet { setNeedsUpdate() } }
    
    /// Attributes used to render the label.
    open var labelAttributes: [any LabelAttributeModel]? { didSet { setNeedsUpdate() } }
    
    /// Text style used to render the label.
    open var labelTextStyle: TextStyle = .defaultStyle { didSet { setNeedsUpdate() } }
    
    /// Text position used to render the label.
    open var labelTextAlignment: TextAlignment = .left { didSet { setNeedsUpdate() } }
    
    /// Color configuration set for the label.
    public lazy var textColorConfiguration: AnyColorable = {
        label.textColorConfiguration
    }() { didSet { setNeedsUpdate() } }
    
    /// Will render the text for Close button for tooltip dialog when on mobile devices
    open var tooltipModel: Tooltip.TooltipModel? { didSet { setNeedsUpdate() } }

    //--------------------------------------------------
    // 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()
        
        addSubview(label)
        label.pinToSuperView()
        
    }
    
    /// Used to make changes to the View based off a change events or from local properties.
    open override func updateView() {
        super.updateView()

        label.text = labelText
        label.textStyle = labelTextStyle
        label.textAlignment = labelTextAlignment.value
        label.attributes = labelAttributes
        label.surface = surface
        label.isEnabled = isEnabled

        //add tooltip
        if let labelText, let tooltipModel, !labelText.isEmpty {
            label.addTooltip(model: tooltipModel)
        }
    }
    
    /// Resets to default settings.
    open override func reset() {
        super.reset()
        shouldUpdateView = false
        labelText = nil
        labelAttributes = nil
        labelTextStyle = .defaultStyle
        labelTextAlignment = .left
        tooltipModel = nil
        shouldUpdateView = true
        setNeedsUpdate()
    }
}


extension Label {
    
    /// Helper to add a tool tip attribute to an existing label.
    public func addTooltip(model: Tooltip.TooltipModel) {
        
        var newAttributes: [any LabelAttributeModel] = []
        if let attributes {
            attributes.forEach { attribute in
                if type(of: attribute) != TooltipLabelAttribute.self {
                    newAttributes.append(attribute)
                }
            }
        }
        
        if let text = text, !text.isEmpty {
            let tooltip = TooltipLabelAttribute(surface: surface, model: model, presenter: self)
            newAttributes.append(tooltip)
        }
        
        if !newAttributes.isEmpty {
            attributes = newAttributes
        }
    }
}