//
//  TestToggleVM.swift
//  JSONCreator
//
//  Created by Matt Bruce on 10/12/22.
//  Copyright © 2022 Verizon Wireless. All rights reserved.
//

import Foundation
import MVMCore
import MVMCoreUI
import VDS


/// This is a mixed model of Atomic + VDS.ToggleModel that will be used with the Control
/// There is no requirement for syncing since it is 1 model
public class TestToggleModel3: MoleculeModelProtocol, FormFieldProtocol, VDS.ToggleModel {
    //ToggleModel
    public var id = UUID()
    public var showText: Bool = true
    public var on: Bool = false
    public var offText: String = "Off"
    public var onText: String = "On"
    public var textWeight: VDS.ToggleTextWeight = .bold
    public var textSize: VDS.ToggleTextSize = .small
    public var textPosition: VDS.ToggleTextPosition = .left
    public var inputId: String?
    public var value: AnyHashable?
    public var dataAnalyticsTrack: String?
    public var dataClickStream: String?
    public var dataTrack: String?
    public var accessibilityHintEnabled: String?
    public var accessibilityHintDisabled: String?
    public var accessibilityValueEnabled: String?
    public var accessibilityValueDisabled: String?
    public var accessibilityLabelEnabled: String?
    public var accessibilityLabelDisabled: String?
    public var surface: VDS.Surface = .light
    public var disabled: Bool = false
    public required init() {}
    
    //--------------------------------------------------
    // MARK: - Properties
    //--------------------------------------------------
    
    public static var identifier: String = "testToggle3"
    public var backgroundColor: Color? //not used
    
    public var selected: Bool = false
    public var enabled: Bool = true
    public var readOnly: Bool = false
    public var action: ActionModelProtocol?
    public var alternateAction: ActionModelProtocol?
    public var accessibilityText: String?
    public var fieldKey: String?
    public var groupName: String = FormValidator.defaultGroupName
    public var baseValue: AnyHashable?

    //--------------------------------------------------
    // MARK: - Keys
    //--------------------------------------------------
    
    private enum CodingKeys: String, CodingKey {
        case moleculeName
        case state
        case enabled
        case readOnly
        case action
        case accessibilityIdentifier
        case alternateAction
        case accessibilityText
        case fieldKey
        case groupName
    }
    
    //--------------------------------------------------
    // MARK: - Form Valdiation
    //--------------------------------------------------
    
    public func formFieldValue() -> AnyHashable? {
        guard enabled else { return nil }
        return on
    }
    
    //--------------------------------------------------
    // MARK: - Server Value
    //--------------------------------------------------
    open func formFieldServerValue() -> AnyHashable? {
        return formFieldValue()
    }
    
    //--------------------------------------------------
    // MARK: - Initializer
    //--------------------------------------------------
    
    public init(_ state: Bool) {
        selected = state
        baseValue = state
    }
    
    //--------------------------------------------------
    // MARK: - Codec
    //--------------------------------------------------
    
    required public init(from decoder: Decoder) throws {
        let typeContainer = try decoder.container(keyedBy: CodingKeys.self)
        
        if let state = try typeContainer.decodeIfPresent(Bool.self, forKey: .state) {
            selected = state
            on = state
        }
        action = try typeContainer.decodeModelIfPresent(codingKey: .action)
        alternateAction = try typeContainer.decodeModelIfPresent(codingKey: .alternateAction)
        accessibilityText = try typeContainer.decodeIfPresent(String.self, forKey: .accessibilityText)
        baseValue = selected
        fieldKey = try typeContainer.decodeIfPresent(String.self, forKey: .fieldKey)
        if let gName = try typeContainer.decodeIfPresent(String.self, forKey: .groupName) {
            groupName = gName
        }
        enabled = try typeContainer.decodeIfPresent(Bool.self, forKey: .enabled) ?? true
        disabled = !enabled
        
        readOnly = try typeContainer.decodeIfPresent(Bool.self, forKey: .readOnly) ?? false
        
        
    }
    
    public func encode(to encoder: Encoder) throws {
        var container = encoder.container(keyedBy: CodingKeys.self)
        try container.encodeIfPresent(accessibilityIdentifier, forKey: .accessibilityIdentifier)
        try container.encodeModelIfPresent(action, forKey: .action)
        try container.encodeModelIfPresent(alternateAction, forKey: .alternateAction)
        try container.encode(moleculeName, forKey: .moleculeName)
        try container.encode(selected, forKey: .state)
        try container.encode(enabled, forKey: .enabled)
        try container.encodeIfPresent(fieldKey, forKey: .fieldKey)
        try container.encodeIfPresent(groupName, forKey: .groupName)
        try container.encode(readOnly, forKey: .readOnly)
    }
    
    public static func == (lhs: TestToggleModel3, rhs: TestToggleModel3) -> Bool {
        return lhs.id == rhs.id
        && lhs.on == rhs.on
        && lhs.showText == rhs.showText
        && lhs.offText == rhs.offText
        && lhs.onText == rhs.onText
        && lhs.textWeight == rhs.textWeight
        && lhs.textSize == rhs.textSize
        && lhs.inputId == rhs.inputId
        && lhs.value == rhs.value
        && lhs.dataAnalyticsTrack == rhs.dataAnalyticsTrack
        && lhs.dataClickStream == rhs.dataClickStream
        && lhs.dataTrack == rhs.dataTrack
        && lhs.accessibilityHintEnabled == rhs.accessibilityHintEnabled
        && lhs.accessibilityHintDisabled == rhs.accessibilityHintDisabled
        && lhs.accessibilityValueEnabled == rhs.accessibilityValueEnabled
        && lhs.accessibilityValueDisabled == rhs.accessibilityValueDisabled
        && lhs.accessibilityLabelEnabled == rhs.accessibilityLabelEnabled
        && lhs.accessibilityLabelEnabled == rhs.accessibilityLabelEnabled
        && lhs.surface == rhs.surface
        && lhs.disabled == rhs.disabled
    }
}

/// The is a Sample of using the ViewModelHandler which is a an intermediate class between the View and the model
/// Since we are using a viewModel there is more legwork upfront, however you can use classes or structs as the model
open class TestToggle3: ToggleViewModelHandlerBase<ToggleViewModelBase<TestToggleModel3>>, VDSVMMoleculeViewProtocol {
    
    //--------------------------------------------------
    // MARK: - Properties
    //--------------------------------------------------
    public var delegateObject: MVMCoreUIDelegateObject?
    public var additionalData: [AnyHashable: Any]?

    //--------------------------------------------------
    // MARK: - Initializers
    //--------------------------------------------------
    public override func initialSetup() {
        super.initialSetup()

        publisher(for: .touchUpInside)
            .sink {[weak self] toggle in
                guard let self = self else { return }
                self.toggle()
            }.store(in: &subscribers)
        
        publisher(for: .valueChanged)
            .sink {[weak self] toggle in
                guard let self = self else { return }
                self.valueChanged(isOn: toggle.isOn)
            }.store(in: &subscribers)
    }
    
    // MARK:- MVMCoreViewProtocol
    open func updateView(_ size: CGFloat) {}
    
    open func viewModelDidSet() {
        FormValidator.setupValidation(for: viewModel.model, delegate: delegateObject?.formHolderDelegate)
        additionalData = additionalData.dictionaryAdding(key: KeySourceModel, value: viewModel)
    }
    
    private func valueChanged(isOn: Bool){
        //tell the form you changed
        _ = FormValidator.validate(delegate: self.delegateObject?.formHolderDelegate)

        if viewModel.model.action != nil || viewModel.model.alternateAction != nil {
            var action: ActionModelProtocol?
            if isOn {
                action = viewModel.model.action
            } else {
                action = viewModel.model.alternateAction ?? viewModel.model.action
            }
            if let action {
                MVMCoreUIActionHandler.performActionUnstructured(with: action,
                                                                 sourceModel: viewModel.model,
                                                                 additionalData: additionalData,
                                                                 delegateObject: delegateObject)
            }
        }
        
        print("toggle value changed to: \(isOn)")
        print("viewModel server value: \(viewModel.model.formFieldServerValue()!)")
    }
    
    public static func estimatedHeight(with model: MoleculeModelProtocol, _ delegateObject: MVMCoreUIDelegateObject?) -> CGFloat? {
        return 44
    }
    
    private typealias ActionDefinition = (model: ActionModelProtocol,
                                          sourceModel: MoleculeModelProtocol?)
    
    private func performActionUnstructured(definition: ActionDefinition) {
        MVMCoreUIActionHandler.performActionUnstructured(with: definition.model,
                                                         sourceModel: definition.sourceModel,
                                                         additionalData: additionalData,
                                                         delegateObject: delegateObject)
    }
}