vds_ios_sample/VDSSample/ViewControllers/ToggleViewController.swift

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

import Foundation
import UIKit
import VDS
import VDSColorTokens

class ToggleViewController: ModelScrollViewController<DefaultToggleModel> {
    
    enum PickerType {
        case surface, textSize, textPosition
    }

    var surfacePickerSelectorView = PickerSelectorView(title: "light")
    var disabledSwitch = UISwitch()
    var showTextSwitch = UISwitch()

    var textFormStackView: UIStackView = {
        return UIStackView().with {
            $0.translatesAutoresizingMaskIntoConstraints = false
            $0.alignment = .fill
            $0.distribution = .fillProportionally
            $0.axis = .vertical
            $0.spacing = 10
        }
    }()
    
    var boldSwitch = UISwitch()
    var textSizePickerSelectorView = PickerSelectorView(title: "Large")
    var textPositionPickerSelectorView = PickerSelectorView(title: "left")
    var onTextField = TextField()
    var offTextField = TextField()

    var toggle = Toggle()

    override func viewDidLoad() {
        super.viewDidLoad()
        addContentTopView(view: toggle)
                
        setupForm()
        setupPicker()
    }
    
    func setupForm() {
        
        addFormRow(label: "Show Text", view: showTextSwitch)
        addFormRow(label: "Surface", view: surfacePickerSelectorView)
        addFormRow(label: "Disabled", view: disabledSwitch)
        
        //add the hidden elements to textFormStackView
        addFormRow(label: "Bold", view: boldSwitch, stackView: textFormStackView)
        addFormRow(label: "Text Size", view: textSizePickerSelectorView, stackView: textFormStackView)
        addFormRow(label: "Text Position", view: textPositionPickerSelectorView, stackView: textFormStackView)
        addFormRow(label: "On Text", view: onTextField, stackView: textFormStackView)
        addFormRow(label: "Off Text", view: offTextField, stackView: textFormStackView)
        //add textFormStackView to main form
        formStackView.addArrangedSubview(textFormStackView)
        
        toggle.publisher(for: .valueChanged).sink { toggle in
            print("toggle changed: \(toggle.isOn)")
        }.store(in: &subscribers)

        showTextSwitch
            .publisher(for: .valueChanged)
            .sink { [weak self] sender in
                self?.toggle.showText = sender.isOn
                self?.textFormStackView.isHidden = !sender.isOn
            }.store(in: &subscribers)

        surfacePickerSelectorView.button
            .publisher(for: .touchUpInside)
            .sink { [weak self] _ in
                self?.pickerType = .surface
            }.store(in: &subscribers)

        textSizePickerSelectorView.button
            .publisher(for: .touchUpInside)
            .sink { [weak self] _ in
                self?.pickerType = .textSize
            }.store(in: &subscribers)

        textPositionPickerSelectorView.button
            .publisher(for: .touchUpInside)
            .sink { [weak self] _ in
                self?.pickerType = .textPosition
            }.store(in: &subscribers)

        disabledSwitch
            .publisher(for: .valueChanged)
            .sink { [weak self] sender in
                self?.toggle.disabled = sender.isOn
            }.store(in: &subscribers)
        
        boldSwitch
            .publisher(for: .valueChanged)
            .sink { [weak self] sender in
                self?.toggle.isBold = sender.isOn
            }.store(in: &subscribers)

        onTextField
            .textPublisher
            .sink { [weak self] text in
                self?.toggle.onText = text
            }.store(in: &subscribers)

        offTextField
            .textPublisher
            .sink { [weak self] text in
                self?.toggle.offText = text
            }.store(in: &subscribers)

        textFormStackView.isHidden = true
    }
    
    override func updateView(viewModel: DefaultToggleModel) {
        print("\(Self.self) updateView(viewModel)")
        toggle.set(with: viewModel)
    }

    //Picker
    var surfacePicker = SurfacePicker()
    var textSizePicker = TextSizePicker()
    var textPositionPicker = TextPositionPicker()
    
    var pickerType: PickerType = .surface {
        didSet {
            func update(object: UIPickerViewDelegate & UIPickerViewDataSource){
                picker.delegate = object
                picker.dataSource = object
            }

            switch pickerType{
            case .surface:
                update(object: surfacePicker)
            case .textSize:
                update(object: textSizePicker)
            case .textPosition:
                update(object: textPositionPicker)
            }
            picker.reloadAllComponents()
            picker.selectRow(0, inComponent: 0, animated: false)
            picker.isHidden = false
        }
    }
    
    func setupPicker(){

        surfacePicker.onPickerDidSelect = {  [weak self] item in
            self?.toggle.surface = item
            self?.contentTopView.backgroundColor = item.color
            self?.surfacePickerSelectorView.text = item.rawValue
        }
                
        textSizePicker.onPickerDidSelect = {  [weak self] item in
            self?.toggle.fontSize = item
            self?.textSizePickerSelectorView.text = item.rawValue
        }

        textPositionPicker.onPickerDidSelect = {  [weak self] item in
            self?.toggle.textPosition = item
            self?.textPositionPickerSelectorView.text = item.rawValue
        }
    }
}