//
//   CheckboxViewController.swift
//  VDSSample
//
//  Created by Matt Bruce on 8/1/22.
//

import Foundation
import UIKit
import VDS
import VDSColorTokens
import Combine

class  CheckboxViewController: UIViewController, StoryboardInitable {
    deinit {
        print("\(Self.self) deinit")
    }
    
    enum PickerType {
        case surface
    }
    static var storyboardId: String = "checkbox"
    static var storyboardName: String = "Components"
    
    @IBOutlet weak var checkboxContainerView: UIView!
    @IBOutlet weak var picker: UIPickerView!
    @IBOutlet weak var surfaceLabel: UILabel!
    
    @IBOutlet weak var disabledSwitch: UISwitch!
    @IBOutlet weak var labelTextField: UITextField!
    @IBOutlet weak var childTextField: UITextField!
    @IBOutlet weak var showErrorSwitch: UISwitch!
    @IBOutlet weak var errorTextField: UITextField!
    
    var model = DefaultCheckboxModel()
    var checkbox = Checkbox()
    var subscribers = Set<AnyCancellable>()
    
    override func viewDidLoad() {
        super.viewDidLoad()
        checkboxContainerView.addSubview(checkbox)
        checkbox.leadingAnchor.constraint(equalTo: checkboxContainerView.leadingAnchor, constant: 10).isActive = true
        checkbox.bottomAnchor.constraint(equalTo: checkboxContainerView.bottomAnchor, constant: -20).isActive = true
        checkbox.topAnchor.constraint(equalTo: checkboxContainerView.topAnchor, constant: 20).isActive = true
        checkbox.trailingAnchor.constraint(equalTo: checkboxContainerView.trailingAnchor, constant: 10).isActive = true
        view.addGestureRecognizer(UITapGestureRecognizer(target: self.view, action: #selector(UIView.endEditing(_:))))
        setupPicker()
        createModel()
        setupBinding()
    }
    
    func createModel() {
        model.labelText = "Terms and conditions"
        model.childText = "I agree to Verizon's terms and conditions click here"
        model.childTextAttributes = [
            LabelAttributeUnderline(location: 11, length: 10),
            LabelAttributeStrikeThrough(location: 22, length: 5),
            LabelAttributeColor(location: 31, length: 10, color: UIColor.blue.hexString!),
            LabelAttributeActionModel(location: 31, length: 10){ print("clicked on the word 'conditions'") },
            LabelAttributeFont(location: 2, length: 5, style: .BoldTitleLarge, color: UIColor.red.hexString!)
        ]
        model.errorText = "Error Text"
        
        checkbox.set(with: model)
        
        //setup UI
        surfaceLabel.text = model.surface.rawValue
        disabledSwitch.isOn = model.selected
        labelTextField.text = model.labelText
        childTextField.text = model.childText
        showErrorSwitch.isOn = model.hasError
        errorTextField.text = model.errorText
        
    }
    
    func setupBinding() {
        //create the subject
        let modelSubject = CurrentValueSubject<DefaultCheckboxModel, Never>(model)
        
        //bind
        checkbox.createBinding(with: modelSubject, storeIn: &subscribers)
        
        //update the model
        //print out on subject changes
        modelSubject
            .debounce(for: .seconds(Constants.ModelStateDebounce), scheduler: RunLoop.main)
            .sink { [weak self] updatedModel in
                self?.model = updatedModel
                self?.showErrorSwitch.isOn = updatedModel.hasError
                print("CheckboxViewController hasError: \(updatedModel.hasError)")
                print("CheckboxViewController selected: \(updatedModel.selected)")
            }.store(in: &subscribers)
    }
    
    
    @IBAction func disabledChanged(_ sender: UISwitch) {
        checkbox.disabled = sender.isOn
    }
    
    @IBAction func onLabelTextDidEnd(_ sender: UITextField) {
        checkbox.labelText = sender.text
        sender.resignFirstResponder()
    }
    
    @IBAction func onChildTextDidEnd(_ sender: UITextField) {
        checkbox.childText = sender.text
        sender.resignFirstResponder()
    }
    
    @IBAction func showErrorChanged(_ sender: UISwitch) {
        checkbox.hasError = sender.isOn
    }
    
    @IBAction func onErrorTextDidEnd(_ sender: UITextField) {
        checkbox.errorText = sender.text
        sender.resignFirstResponder()
    }
    
    @IBAction func surfaceClick(_ sender: Any) {
        pickerType = .surface
    }
    
    //Picker
    var surfacePicker = SurfacePicker()
    
    var pickerType: PickerType = .surface {
        didSet {
            func update(object: UIPickerViewDelegate & UIPickerViewDataSource){
                picker.delegate = object
                picker.dataSource = object
            }
            
            switch pickerType{
            case .surface:
                update(object: surfacePicker)
            }
            picker.reloadAllComponents()
            picker.selectRow(0, inComponent: 0, animated: false)
            picker.isHidden = false
        }
    }
    
    func setupPicker(){
        picker.isHidden = true
        surfacePicker.onPickerDidSelect = {  [weak self] item in
            self?.checkbox.surface = item
            self?.checkboxContainerView.backgroundColor = item.color
            self?.surfaceLabel.text = item.rawValue
        }
    }
}