//
//  ButtonViewController.swift
//  VDSSample
//
//  Created by Jarrod Courtney on 9/16/22.
//

import Foundation
import UIKit
import VDS
import VDSColorTokens

class ButtonViewController: ModelScrollViewController<DefaultButtonModel> {

    enum PickerType {
        case surface, use, buttonSize
    }
    var surfacePickerSelectorView = PickerSelectorView(title: "")
    var usePickerSelectorView = PickerSelectorView(title: "")
    var buttonSizePickerSelectorView = PickerSelectorView(title: "")

    var disabledSwitch = UISwitch()
    var textField = TextField()
    var widthTextField = TextField()

    let button = Button()

    override func viewDidLoad() {
        super.viewDidLoad()
        let view = UIView()
        view.translatesAutoresizingMaskIntoConstraints = false
        view.addSubview(button)
        button.topAnchor.constraint(equalTo: view.topAnchor).isActive = true
        button.bottomAnchor.constraint(equalTo: view.bottomAnchor).isActive = true
        button.leadingAnchor.constraint(equalTo: view.leadingAnchor).isActive = true
        addContentTopView(view: view)

        setupForm()
        setupPicker()
        setupModel()
    }
    
    func setupForm(){
        addFormRow(label: "Surface", view: surfacePickerSelectorView)
        addFormRow(label: "Use", view: usePickerSelectorView)
        addFormRow(label: "Disabled", view: disabledSwitch)
        addFormRow(label: "Label", view: textField)
        addFormRow(label: "Width", view: widthTextField)
        addFormRow(label: "Size", view: buttonSizePickerSelectorView)


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

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

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

        textField
            .textPublisher
            .sink { [weak self] text in
                self?.button.setTitle(text, for: .normal)
            }.store(in: &subscribers)
        
        widthTextField
            .textPublisher
            .sink { [weak self] text in
                if let n = NumberFormatter().number(from: text) {
                    self?.button.buttonWidth = CGFloat(truncating: n)
                }
            }.store(in: &subscribers)
        
        buttonSizePickerSelectorView.button
            .publisher(for: .touchUpInside)
            .sink { [weak self] _ in
                self?.pickerType = .buttonSize
            }.store(in: &subscribers)

    }
    
    func setupModel() {
        var defaultModel = DefaultButtonModel()
        defaultModel.text = "Button"
        set(with: defaultModel)

        button
            .handlerPublisher()
            .sink { [weak self] viewModel in
                self?.model = viewModel
            }.store(in: &subscribers)
        
        //setup UI
        surfacePickerSelectorView.text = model.surface.rawValue
        disabledSwitch.isOn = model.disabled
        textField.text = model.text
        usePickerSelectorView.text = model.use.rawValue
        widthTextField.text = "200"
        buttonSizePickerSelectorView.text = Use.Size.large.rawValue
    }
    
    override func updateView(viewModel: DefaultButtonModel) {
        button.set(with: viewModel)
    }
      
    //Picker
    var surfacePicker = SurfacePicker()
    var usePicker = UsePicker()
    var buttonSizePicker = ButtonSizePicker()
    
    var pickerType: PickerType = .surface {
        didSet {
            func update(object: UIPickerViewDelegate & UIPickerViewDataSource){
                picker.delegate = object
                picker.dataSource = object
            }

            switch pickerType{
            case .surface:
                update(object: surfacePicker)
            case .use:
                update(object: usePicker)
            case .buttonSize:
                update(object: buttonSizePicker)
            }
            picker.reloadAllComponents()
            picker.selectRow(0, inComponent: 0, animated: false)
            picker.isHidden = false
        }
    }
        
    func setupPicker(){
        surfacePicker.onPickerDidSelect = {  [weak self] item in
            self?.button.surface = item
            self?.contentTopView.backgroundColor = item.color
            self?.surfacePickerSelectorView.text = item.rawValue
        }
        
        usePicker.onPickerDidSelect = {  [weak self] item in
            self?.button.use = item
            self?.button.backgroundColor = item.color
            self?.usePickerSelectorView.text = item.rawValue
        }
        
        buttonSizePicker.onPickerDidSelect = { [weak self] item in
            self?.button.buttonSize = item
            self?.buttonSizePickerSelectorView.text = item.rawValue
        }
    }
}