//
//  TitleLockupViewController.swift
//  VDSSample
//
//  Created by Matt Bruce on 12/19/22.
//

import Foundation
import UIKit
import VDS
import VDSCoreTokens

class TitleLockupViewController: BaseViewController<TitleLockup> {

    lazy var textAlignmentPickerSelectorView = {
        PickerSelectorView(title: "left",
                           picker: self.picker,
                           items: TitleLockup.TextAlignment.allCases)
    }()
    
    lazy var titleStandardStylePickerSelectorView = {
        PickerSelectorView(title: "",
                           picker: self.picker,
                           items: TitleLockup.TitleStandardStyle.allCases.sorted{ $0.rawValue < $1.rawValue })
    }()
    
    lazy var otherStandardStylePickerSelectorView = {
        PickerSelectorView(title: "",
                           picker: self.picker,
                           items: TitleLockup.OtherStandardStyle.allCases.sorted{ $0.rawValue < $1.rawValue })
    }()

    var titleIsBold = Toggle().with { $0.isOn = true }
    var eyebrowIsBold = Toggle().with { $0.isOn = true }
    var eyebrowTextField = TextField()
    var titleTextField = TextField()
    var subTitleTextField = TextField()

    /// **********************************************
    /// Text Color
    lazy var colorPicker: UIColorPickerViewController = {
        let picker = UIColorPickerViewController()
        picker.delegate = self
        return picker
    }()
    
    var currentLabelType: LabelType = .title
    var colorPickerType: ColorPickerType = .custom
    
    enum LabelType {
        case eyebrow, title, subtitle
    }
    
    enum TitleTextColor: String, CaseIterable {
        case primary, token, custom
    }
    
    enum TextColor: String, CaseIterable {
        case primary, secondary, token, custom
    }
    
    enum ColorPickerType {
        case custom
    }
    
    /// eyebrow
    var eyebrowTokenFormStackView = FormSection().with { $0.isHidden = true }
    var eyebrowColorFormStackView = FormSection().with { $0.isHidden = true }
    lazy var eyebrowColorPickerSelectorView = {
        PickerSelectorView(title: "primary",
                           picker: self.picker,
                           items: TextColor.allCases)
    }()

    lazy var eyebrowTokenColorView = {
        PickerSelectorView(title: "",
                           picker: self.picker,
                           items: UIColor.VDSColor.allCases)
        .with { $0.text = UIColor.VDSColor.paletteBlack.rawValue }
    }()

    lazy var eyebrowCustomColorView: ColorPickerView<ColorPickerType> = {
        return .init(with: ColorPickerType.custom, color: .black) { [weak self] picker in
            self?.colorPickerType = picker.pickerType
            self?.selectedColorTapped(picker)
        }
    }()
    
    /// title
    var titleTokenFormStackView = FormSection().with { $0.isHidden = true }
    var titleColorFormStackView = FormSection().with { $0.isHidden = true }
    lazy var titleColorPickerSelectorView = {
        PickerSelectorView(title: "primary",
                           picker: self.picker,
                           items: TitleTextColor.allCases)
    }()
    
    lazy var titleTokenColorView = {
        PickerSelectorView(title: "",
                           picker: self.picker,
                           items: UIColor.VDSColor.allCases)
        .with { $0.text = UIColor.VDSColor.paletteBlack.rawValue }
    }()

    lazy var titleCustomColorView: ColorPickerView<ColorPickerType> = {
        return .init(with: ColorPickerType.custom, color: .black) { [weak self] picker in
            self?.colorPickerType = picker.pickerType
            self?.selectedColorTapped(picker)
        }
    }()
    
    /// subtitle
    var subtitleTokenFormStackView = FormSection().with { $0.isHidden = true }
    var subtitleColorFormStackView = FormSection().with { $0.isHidden = true }
    lazy var subtitleColorPickerSelectorView = {
        PickerSelectorView(title: "primary",
                           picker: self.picker,
                           items: TextColor.allCases)
    }()
    
    lazy var subtitleTokenColorView = {
        PickerSelectorView(title: "",
                           picker: self.picker,
                           items: UIColor.VDSColor.allCases)
        .with { $0.text = UIColor.VDSColor.paletteBlack.rawValue }
    }()

    lazy var subtitleCustomColorView: ColorPickerView<ColorPickerType> = {
        return .init(with: ColorPickerType.custom, color: .black) { [weak self] picker in
            self?.colorPickerType = picker.pickerType
            self?.selectedColorTapped(picker)
        }
    }()


    override func viewDidLoad() {
        super.viewDidLoad()
        addContentTopView(view: component)

        setupPicker()
        setupModel()
    }
    
    override func setupForm(){
        super.setupForm()  
        addFormRow(label: "Surface", view: surfacePickerSelectorView)
        addFormRow(label: "Text Alignment", view: textAlignmentPickerSelectorView)

        append(section: .init().with({
            $0.title = "Text Styles"
            $0.addFormRow(label: "Title", view: titleStandardStylePickerSelectorView)
            $0.addFormRow(label: "Eyebrow/Subtitle", view: otherStandardStylePickerSelectorView)
        }))

        append(section: .init().with({
            $0.title = "\nEyebrow"
            $0.addFormRow(label: "is Bold", view: eyebrowIsBold, pinTrailing: false)
            $0.addFormRow(label: "Text", view: eyebrowTextField)
            $0.addFormRow(label: "Color", view: eyebrowColorPickerSelectorView)
        }))
        
        eyebrowTokenFormStackView.addFormRow(label: "Token", view: eyebrowTokenColorView)
        eyebrowColorFormStackView.addFormRow(label: "Custom", view: eyebrowCustomColorView)
        append(section: eyebrowTokenFormStackView)
        append(section: eyebrowColorFormStackView)

        append(section: .init().with({
            $0.title = "\nTitle"
            $0.addFormRow(label: "is Bold", view: titleIsBold, pinTrailing: false)
            $0.addFormRow(label: "Text", view: titleTextField)
            $0.addFormRow(label: "Color", view: titleColorPickerSelectorView)
        }))
        titleTokenFormStackView.addFormRow(label: "Token", view: titleTokenColorView)
        titleColorFormStackView.addFormRow(label: "Custom", view: titleCustomColorView)
        append(section: titleTokenFormStackView)
        append(section: titleColorFormStackView)

        append(section: .init().with({
            $0.title = "\nSubtitle"
            $0.addFormRow(label: "Subtitle Text", view: subTitleTextField)
            $0.addFormRow(label: "Subtitle Color", view: subtitleColorPickerSelectorView)
        }))
        subtitleTokenFormStackView.addFormRow(label: "Token", view: subtitleTokenColorView)
        subtitleColorFormStackView.addFormRow(label: "Custom", view: subtitleCustomColorView)
        append(section: subtitleTokenFormStackView)
        append(section: subtitleColorFormStackView)
        
        eyebrowIsBold.publisher(for: .valueChanged).sink { [weak self] toggle in
            self?.setOtherModels()
        }.store(in: &subscribers)

        titleIsBold.publisher(for: .valueChanged).sink { [weak self] toggle in
            self?.setTitleModel()
        }.store(in: &subscribers)

        eyebrowTextField
            .textPublisher
            .sink { [weak self] text in
                self?.setOtherModels()
            }.store(in: &subscribers)

        titleTextField
            .textPublisher
            .sink { [weak self] text in
                self?.setTitleModel()
            }.store(in: &subscribers)

        subTitleTextField
            .textPublisher
            .sink { [weak self] text in
                self?.setOtherModels()
            }.store(in: &subscribers)
    }
    
    func setupModel() {
        let eyebrowModel = TitleLockup.EyebrowModel(text: "Today only.")
        let titleModel = TitleLockup.TitleModel(text: "Get more of our best")
        let subTitleModel = TitleLockup.SubTitleModel(text: "Get both of our best and pay less. Pair 5G Home Internet with Verizon mobile to save every month.")
        
        component.eyebrowModel = eyebrowModel
        component.titleModel = titleModel
        component.subTitleModel = subTitleModel
        
        //setup UI
        surfacePickerSelectorView.text = component.surface.rawValue
        textAlignmentPickerSelectorView.text = TextAlignment.left.rawValue
        otherStandardStylePickerSelectorView.text = subTitleModel.otherStandardStyle.rawValue
        titleStandardStylePickerSelectorView.text = titleModel.standardStyle.rawValue
        eyebrowTextField.text = eyebrowModel.text
        titleTextField.text = titleModel.text
        subTitleTextField.text = subTitleModel.text
        
        setTitleModel()
        updateOtherTextStyles()
    }

    func setTitleModel() {
        var titleTextStyle: TextStyle?
        if let text = titleTextField.text, !text.isEmpty {
            
            var textColor: TitleLockup.TitleTextColor
            switch titleColorPickerSelectorView.selectedItem {
            case .primary:
                textColor = .primary
            case .token:
                textColor = .token(titleTokenColorView.selectedItem)
            case .custom:
                if let color = titleCustomColorView.selectedColor {
                    textColor = .custom(color)
                } else {
                    textColor = .custom(VDSColor.elementsPrimaryOnlight)
                }
            }

            component.titleModel = TitleLockup.TitleModel(text: text, textColor: textColor, isBold: titleIsBold.isOn, standardStyle: titleStandardStylePickerSelectorView.selectedItem)
            titleTextStyle = titleIsBold.isOn ? titleStandardStylePickerSelectorView.selectedItem.value.bold : titleStandardStylePickerSelectorView.selectedItem.value.regular
        } else {
            component.titleModel = nil
        }
        debug(type: "Title", textStyle: titleTextStyle)
    }
    
    func updateOtherTextStyles() {
        let items = component.standardStyleConfiguration.configuration(for: titleStandardStylePickerSelectorView.selectedItem)!.allOtherStandardStyles
        otherStandardStylePickerSelectorView.items = items
        otherStandardStylePickerSelectorView.text = items.first?.rawValue ?? ""
        setOtherModels()
    }
    
    func setOtherModels() {
        let style = otherStandardStylePickerSelectorView.selectedItem
    
        if let text = subTitleTextField.text, !text.isEmpty {
            var textColor: TitleLockup.TextColor
            switch subtitleColorPickerSelectorView.selectedItem {
            case .primary:
                textColor = .primary
            case .secondary:
                textColor = .secondary
            case .token:
                textColor = .token(subtitleTokenColorView.selectedItem)
            case .custom:
                if let color = subtitleCustomColorView.selectedColor {
                    textColor = .custom(color)
                } else {
                    textColor = .custom(VDSColor.elementsPrimaryOnlight)
                }
            }
            component.subTitleModel = TitleLockup.SubTitleModel(text: text, otherStandardStyle: style, textColor: textColor)
            debug(type: "SubTitle", textStyle: style.value.regular)
        } else {
            component.subTitleModel = nil
        }
        
        if let text = eyebrowTextField.text, !text.isEmpty {
            var textColor: TitleLockup.TextColor
            switch eyebrowColorPickerSelectorView.selectedItem {
            case .primary:
                textColor = .primary
            case .secondary:
                textColor = .secondary
            case .token:
                textColor = .token(eyebrowTokenColorView.selectedItem)
            case .custom:
                if let color = eyebrowCustomColorView.selectedColor {
                    textColor = .custom(color)
                } else {
                    textColor = .custom(VDSColor.elementsPrimaryOnlight)
                }           
            }
            component.eyebrowModel = TitleLockup.EyebrowModel(text: text, textColor: textColor, isBold: eyebrowIsBold.isOn, standardStyle: style)
            debug(type: "EyeBrow", textStyle: eyebrowIsBold.isOn ? style.value.bold : style.value.regular)
            
        } else {
            component.eyebrowModel = nil
        }
    }
    
    func debug(type: String, textStyle: TextStyle?) {
        guard let textStyle else { return }
        //DebugLog("\n\(type)\n\(descriptionFor(style: textStyle))\n\n")
    }
    
    //Picker
    func setupPicker(){
        surfacePickerSelectorView.onPickerDidSelect = {  [weak self] item in
            self?.component.surface = item
            self?.contentTopView.backgroundColor = item.color
        }
        
        textAlignmentPickerSelectorView.onPickerDidSelect = {  [weak self] item in
            self?.component.textAlignment = item
        }
        
        titleStandardStylePickerSelectorView.onPickerDidSelect = {  [weak self] item in
            self?.setTitleModel()
            self?.updateOtherTextStyles()
        }

        otherStandardStylePickerSelectorView.onPickerDidSelect = {  [weak self] item in
            self?.setOtherModels()
        }

        
        eyebrowColorPickerSelectorView.onPickerDidSelect  = {  [weak self] item in
            self?.currentLabelType = .eyebrow
            self?.eyebrowTokenFormStackView.isHidden = item != .token
            self?.eyebrowColorFormStackView.isHidden = item != .custom
            self?.setOtherModels()
        }
        
        eyebrowTokenColorView.onPickerDidSelect  = {  [weak self] item in
            self?.setOtherModels()
        }
        
        titleColorPickerSelectorView.onPickerDidSelect  = {  [weak self] item in
            self?.currentLabelType = .title
            self?.titleTokenFormStackView.isHidden = item != .token
            self?.titleColorFormStackView.isHidden = item != .custom
            self?.setTitleModel()
        }
        
        titleTokenColorView.onPickerDidSelect  = {  [weak self] item in
            self?.setTitleModel()
        }
        
        subtitleColorPickerSelectorView.onPickerDidSelect  = {  [weak self] item in
            self?.currentLabelType = .subtitle
            self?.subtitleTokenFormStackView.isHidden = item != .token
            self?.subtitleColorFormStackView.isHidden = item != .custom
            self?.setOtherModels()
        }
        
        subtitleTokenColorView.onPickerDidSelect  = {  [weak self] item in
            self?.setOtherModels()
        }
    }
}

extension TitleLockupViewController: ComponentSampleable {
    static func makeSample() -> ComponentSample {
        let component = Self.makeComponent()
        let eyebrowModel = TitleLockup.EyebrowModel(text: "Today only.")
        let titleModel = TitleLockup.TitleModel(text: "Get more of our best")
        let subTitleModel = TitleLockup.SubTitleModel(text: "Get both of our best and pay less. Pair 5G Home Internet with Verizon mobile to save every month.")
        
        component.eyebrowModel = eyebrowModel
        component.titleModel = titleModel
        component.subTitleModel = subTitleModel
        return ComponentSample(component: component)
    }
}

extension TitleLockupViewController: UIColorPickerViewControllerDelegate {
    
    func selectedColorTapped(_ picker: ColorPickerView<ColorPickerType>) {
        let selectedColor = picker.selectedColor
        if let selectedColor {
            colorPicker.selectedColor = selectedColor
        }
        present(colorPicker, animated: true)
    }
    
    func colorPickerViewControllerDidFinish(_ viewController: UIColorPickerViewController) {
        dismiss(animated: true)
    }
    
    func colorPickerViewControllerDidSelectColor(_ viewController: UIColorPickerViewController) {
        guard let hexString = viewController.selectedColor.hexString else { return }
        var colorView: ColorPickerView<ColorPickerType>
        
        switch currentLabelType {
        case .eyebrow:
            colorView = eyebrowCustomColorView
        case .title:
            colorView = titleCustomColorView
        case .subtitle:
            colorView = subtitleCustomColorView
        }

        colorView.selectedColor = viewController.selectedColor
        
        if currentLabelType == .title {
            setTitleModel()
        } else {
            setOtherModels()
        }
    }
}