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

import Foundation
import UIKit
import VDS
import VDSColorTokens

class ButtonGroupViewController: BaseViewController {
    var collectionView: UICollectionView!
    
    public enum RowQuantity: String, CaseIterable {
        case none, one, two, three, four
        
        init(quantity: Int){
            
            if quantity == 1 {
                self = .one
            } else if quantity == 2 {
                self = .two
            } else if quantity == 3 {
                self = .three
            } else if quantity == 4 {
                self = .four
            } else {
                self = .none
            }
            
        }
        var intValue: Int {
            switch self {
            case .none:
                return 0
            case .one:
                return 1
            case .two:
                return 2
            case .three:
                return 3
            case .four:
                return 4
            }
        }
    }
    
    lazy var buttonPositionSelectorView = {
        PickerSelectorView<ButtonGroup.ButtonPosition>(title: "",
                                                       picker: self.picker,
                                                       items: ButtonGroup.ButtonPosition.allCases)
    }()
    
    lazy var rowQuantitySelectorView = {
        PickerSelectorView<RowQuantity>(title: "",
                                        picker: self.picker,
                                        items: RowQuantity.allCases)
    }()
    
    var label = Label()
    var disabledSwitch = Toggle()
    var widthTextField = NumericField()
    var percentageTextField = NumericField()

    let largeButtonGroup = ButtonGroup()
    let smallButtonGroup = ButtonGroup()
    let largeLabel = Label().with{ $0.text = "Large Button Group"; $0.textStyle = .BoldTitleSmall }
    let smallLabel = Label().with{ $0.text = "Small Button Group"; $0.textStyle = .BoldTitleSmall }

    override func allTextFields() -> [TextField]? { [widthTextField, percentageTextField] }

    override func viewDidLoad() {
        super.viewDidLoad()
        
        let stackView = UIStackView(arrangedSubviews: [largeLabel, largeButtonGroup, smallLabel, smallButtonGroup])
        stackView.setCustomSpacing(50, after: largeButtonGroup)
        stackView.axis = .vertical
        stackView.spacing = 30
        
        largeButtonGroup.buttons = [
            makeButton("Secondary", label: label).with{ $0.use = .secondary },
            makeButton("Primary", label: label),
            makeTextLink("Large Text Link", label: label),
            makeButton("Widge Label Button", label: label),
            makeTextLinkCaret("Text Link Caret", label: label),
        ]
        
        smallButtonGroup.buttons = [
            makeTextLink("Small Text Link", label: label).with{ $0.size = .small },
            makeButton("Small Button", label: label).with{$0.size = .small; $0.use = .secondary },
            makeTextLink("Text Link 1", label: label).with{ $0.size = .small },
            makeTextLink("Text Link 2", label: label).with{ $0.size = .small },
            makeButton("Small Button 2", label: label).with{$0.size = .small; $0.use = .secondary }
        ]
        
        addContentTopView(view: stackView)
        percentageTextField.isEnabled = false
        percentageTextField.placeholder = "Active RowQty != none"
        widthTextField.placeholder = "Active RowQty == none"
        setupForm()
        setupPicker()
        setupModel()
    }
    
    func setupForm(){
        addFormRow(label: "Button Action", view: label)
        addFormRow(label: "Surface", view: surfacePickerSelectorView)
        addFormRow(label: "Disabled", view: .makeWrapper(for: disabledSwitch))
        addFormRow(label: "Position", view: buttonPositionSelectorView)
        addFormRow(label: "Width", view: widthTextField)
        addFormRow(label: "Row Quantity", view: rowQuantitySelectorView)
        addFormRow(label: "Percentage (1-100)", view: percentageTextField)

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

        widthTextField
            .textPublisher
            .sink { [weak self] text in
                if let n = NumberFormatter().number(from: text) {
                    self?.largeButtonGroup.buttonWidth = CGFloat(truncating: n)
                    self?.smallButtonGroup.buttonWidth = CGFloat(truncating: n)
                    self?.percentageTextField.text = ""
                } else {
                    self?.largeButtonGroup.buttonWidth = nil
                }
            }.store(in: &subscribers)
        
        percentageTextField
            .textPublisher
            .sink { [weak self] text in
                let rowQty = self?.largeButtonGroup.rowQuantity ?? 0
                if let n = NumberFormatter().number(from: text), n.intValue <= 100, rowQty > 0 {
                    self?.largeButtonGroup.buttonPercentage = CGFloat(truncating: n)
                    self?.smallButtonGroup.buttonPercentage = CGFloat(truncating: n)
                    self?.widthTextField.text = ""
                } else {
                    self?.largeButtonGroup.buttonPercentage = nil
                    self?.smallButtonGroup.buttonPercentage = nil
                }
            }.store(in: &subscribers)

    }
        
    func setupModel() {
        //setup UI
        surfacePickerSelectorView.text = largeButtonGroup.surface.rawValue
        buttonPositionSelectorView.text = largeButtonGroup.buttonPosition.rawValue
        disabledSwitch.isOn = largeButtonGroup.disabled
        rowQuantitySelectorView.text = RowQuantity(quantity: largeButtonGroup.rowQuantity).rawValue
        widthTextField.text = ""
    }
      
    func setupPicker(){
        
        surfacePickerSelectorView.onPickerDidSelect = {  [weak self] item in
            self?.largeLabel.surface = item
            self?.smallLabel.surface = item
            self?.largeButtonGroup.surface = item
            self?.smallButtonGroup.surface = item
            self?.contentTopView.backgroundColor = item.color
        }
        
        buttonPositionSelectorView.onPickerDidSelect = {  [weak self] item in
            self?.largeButtonGroup.buttonPosition = item
            self?.smallButtonGroup.buttonPosition = item
        }
        
        rowQuantitySelectorView.onPickerDidSelect = {  [weak self] item in
            self?.percentageTextField.isEnabled = item.intValue > 0
            self?.widthTextField.isEnabled = item.intValue == 0
                        
            if item == .none {
                self?.percentageTextField.text = ""
            } else {
                self?.widthTextField.text = ""
                self?.largeButtonGroup.buttonWidth = nil
                self?.smallButtonGroup.buttonWidth = nil
            }
            
            if UIDevice.isIPad {
                self?.largeButtonGroup.rowQuantityTablet = item.intValue
                self?.smallButtonGroup.rowQuantityTablet = item.intValue
            } else {
                self?.largeButtonGroup.rowQuantityPhone = item.intValue
                self?.smallButtonGroup.rowQuantityPhone = item.intValue
            }
        }
    }
}