//
//  RadioButtonGroup.swift
//  VDS
//
//  Created by Matt Bruce on 8/11/22.
//

import Foundation

public class RadioButtonGroup: RadioButtonGroupBase<DefaultRadioButtonGroupModel, RadioButton> {}

public class RadioButtonGroupBase<RadioButtonGroupModelType: RadioButtonGroupModel, RadioButtonType: RadioButtonBase<RadioButtonGroupModelType.SelectorType>>: SelectorGroupBase<RadioButtonGroupModelType.SelectorType, RadioButtonGroupModelType, RadioButtonType> {

    @Proxy(\.model.selectedModel)
    public var selectedModel: RadioButtonGroupModelType.SelectorType? {
        didSet{
            if hasError, selectedModel != nil {
                hasError = false
            }
        }
    }
    
    public var hasError: Bool {
        get { model.hasError }
        set {
            var newHasError = newValue
            if selectedModel != nil, newHasError {
                newHasError = false
            }
            let selectors = model.selectors.compactMap { existing in
                return updated(existing){
                    $0.hasError = newHasError
                }
            }
            model.hasError = newHasError
            model.selectors = selectors
        }
    }
    
    override public func shouldUpdateView(viewModel: SelectorGroupBase<RadioButtonGroupModelType.SelectorType, RadioButtonGroupModelType, RadioButtonType>.ModelType) -> Bool {
        let update = viewModel.selectedModel?.id != model.selectedModel?.id
        || super.shouldUpdateView(viewModel: viewModel)
        return update
    }
    
    public override func didSelect(selector: RadioButtonGroupModelType.SelectorType) {
        
        for selectorModel in model.selectors {
            print("Pre Cached Selector: \(selectorModel.id): \(selectorModel.selected)")
        }
        
        if var oldSelectedModel = selectedModel {
            oldSelectedModel.selected = false
            replace(viewModel: oldSelectedModel)
        }
        
        //only select is selected
        if selector.selected {
            var newSelectedModel = selector
            newSelectedModel.selected = true
            replace(viewModel: newSelectedModel)
            selectedModel = newSelectedModel
        } else {
            //ensure current value is removed
            selectedModel = nil
        }
        
        for selectorModel in model.selectors {
            print("Post Cached Selector: \(selectorModel.id): \(selectorModel.selected)")
        }

        print("\n")
    }
}