//  TableViewTestController.swift
//  VDSSample
//
//  Created by Matt Bruce on 5/3/23.
//

import Foundation
import UIKit
import VDS
import VDSColorTokens

public typealias ComponentSampleView = UIView & Surfaceable

public struct ComponentSample {
    public var component: ComponentSampleView
    public enum GreaterThanPinningType: String {
        case none, equalTo, greaterThanOrEqual
    }
    
    public enum LessThanPinningType: String {
        case none, equalTo, lessThanOrEqual
    }
    
    public var top: GreaterThanPinningType = .equalTo
    public var leading: GreaterThanPinningType = .equalTo
    public var trailing: LessThanPinningType = .equalTo
    public var bottom: LessThanPinningType = .equalTo
    
    public init(component: ComponentSampleView,
                topPinningType: GreaterThanPinningType = .equalTo,
                leadingPinningType: GreaterThanPinningType = .equalTo,
                trailingPinningType: LessThanPinningType = .equalTo,
                bottomPinningType: LessThanPinningType = .equalTo) {
        
        self.component = component
        self.top = topPinningType
        self.leading = leadingPinningType
        self.trailing = trailingPinningType
        self.bottom = bottomPinningType
    }
    
    public func pin(edgeInset: UIEdgeInsets = .zero) {
        
        guard let superview = component.superview else { return }
        switch top {
        case .equalTo:
            component.pinTop(anchor: superview.topAnchor, constant: edgeInset.top)
            
        case .greaterThanOrEqual:
            component.pinTopGreaterThanOrEqualTo(anchor: superview.topAnchor, constant: edgeInset.top)
            
        case .none: break
        }
        
        switch leading {
        case .equalTo:
            component.pinLeading(anchor: superview.leadingAnchor, constant: edgeInset.left)
            
        case .greaterThanOrEqual:
            component.pinLeadingGreaterThanOrEqualTo(anchor: superview.leadingAnchor, constant: edgeInset.left)
            
        case .none: break

        }
        
        switch trailing {
        case .equalTo:
            component.pinTrailing(anchor: superview.trailingAnchor, constant: edgeInset.right)
            
        case .lessThanOrEqual:
            component.pinTrailingLessThanOrEqualTo(anchor: superview.trailingAnchor, constant: edgeInset.right)
            
        case .none: break
        }
        
        switch bottom {
        case .equalTo:
            component.pinBottom(anchor: superview.bottomAnchor, constant: edgeInset.bottom)
            
        case .lessThanOrEqual:
            component.pinBottomLessThanOrEqualTo(anchor: superview.bottomAnchor, constant: edgeInset.bottom)
            
        case .none: break
        }
        
    }
}

protocol ComponentSampleable {
    static func makeSample() -> ComponentSample
}

public class TableViewTestController: UIViewController, Initable, Surfaceable {
    
    var components:[ComponentSample] = []
    lazy var tableView = UITableView().with {
        $0.translatesAutoresizingMaskIntoConstraints = false
    }
    
    public var surface: Surface = .light {
        didSet {
            tableView.reloadData()
        }
    }
    //--------------------------------------------------
    // MARK: - Initializers
    //--------------------------------------------------
    required public init() {
        super.init(nibName: nil, bundle: nil)
    }
    
    required init?(coder: NSCoder) {
        fatalError("init(coder:) has not been implemented")
    }
    
    public override func viewDidLoad() {
        super.viewDidLoad()
        
        let toggle = Toggle().with {
            $0.showText = true
            //$0.textPosition = .right
            $0.offText = "Light"
            $0.onText = "Dark"
            $0.onChange = { [weak self] toggle in
                self?.surface = toggle.isOn ? .dark : .light
            }
        }

        let toggleSample = ComponentSample(component: toggle, leadingPinningType: .none)
        let wrapper = UIView().with { $0.translatesAutoresizingMaskIntoConstraints = false }
        wrapper.addSubview(toggle)
        toggleSample.pin(edgeInset: .init(top: 5, left: 0, bottom: 5, right: 16))
        
        let stackView = UIStackView(arrangedSubviews: [wrapper, tableView]).with {
            $0.translatesAutoresizingMaskIntoConstraints = false
            $0.axis = .vertical
            $0.spacing = 4
            $0.distribution = .fill
        }
        view.backgroundColor = Surface.light.color
        view.addSubview(stackView)
        
        NSLayoutConstraint.activate([
            stackView.topAnchor.constraint(equalTo: view.safeAreaLayoutGuide.topAnchor),
            stackView.leadingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.leadingAnchor),
            stackView.trailingAnchor.constraint(equalTo: view.safeAreaLayoutGuide.trailingAnchor),
            stackView.bottomAnchor.constraint(equalTo: view.safeAreaLayoutGuide.bottomAnchor)
        ])
        
        //var items = MenuViewController.items
        let items = [
            MenuComponent(title: "Badge", completed: true, viewController: BadgeViewController.self),
            MenuComponent(title: "Button", completed: true, viewController: ButtonViewController.self),
            MenuComponent(title: "ButtonGroup", completed: true, viewController: ButtonGroupViewController.self),
            MenuComponent(title: "Icon", completed: true, viewController: IconViewController.self),
            MenuComponent(title: "Line", completed: true, viewController: LineViewController.self),
            MenuComponent(title: "Loader", completed: true, viewController: LoaderViewController.self),
            MenuComponent(title: "Tabs", completed: true, viewController: TabsViewController.self),
            MenuComponent(title: "TextLink", completed: true, viewController: TextLinkViewController.self),
            MenuComponent(title: "TextLinkCaret", completed: true, viewController: TextLinkCaretViewController.self),
            MenuComponent(title: "TitleLockup", completed: true, viewController: TitleLockupViewController.self),
            MenuComponent(title: "Tooltip", completed: true, viewController: TooltipViewController.self),
        ]
        
        items.forEach { menuItem in
            if let componentable = menuItem.viewController as? ComponentSampleable.Type {
                components.append(componentable.makeSample())
            }
        }
        
        tableView.allowsSelection = false
        tableView.estimatedRowHeight = 20
        tableView.rowHeight = UITableView.automaticDimension
        tableView.separatorStyle = .singleLine
        tableView.delegate = self
        tableView.dataSource = self
    }
    
    public func refresh() {
        DispatchQueue.main.async { [self] in
            tableView.beginUpdates()
            tableView.endUpdates()
        }
    }
}

extension TableViewTestController : UITableViewDelegate, UITableViewDataSource {
    
    public func numberOfSections(in tableView: UITableView) -> Int {
        1
    }
    
    public func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
        components.count
    }

    public func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
        let cell = UITableViewCell()
        let sample = components[indexPath.row]
        var component = sample.component
        component.surface = surface
        cell.contentView.addSubview(component)
        sample.pin(edgeInset: .init(top: 16, left: 16, bottom: 16, right: 16))
        cell.backgroundColor = surface.color
        return cell
    }

}