//
//  TextViewModel.swift
//  MVMCoreUI
//
//  Created by Kevin Christiano on 5/7/20.
//  Copyright © 2020 Verizon Wireless. All rights reserved.
//

import UIKit


open class TextViewModel: MoleculeModelProtocol {//, FormFieldProtocol, FormRuleWatcherFieldProtocol {
    //--------------------------------------------------
    // MARK: - Properties
    //--------------------------------------------------
    
    public class var identifier: String {
        return ""
    }
    
    public var baseValue: AnyHashable?
    public var backgroundColor: Color?
//    public var fieldKey: String?
    public var fontStyle: Styler.Font = Styler.Font.RegularBodySmall
    public var text: String?
    public var placeholder: String?
    public var textAlignment: NSTextAlignment = .left
//    public var groupName: String
    public var editable: Bool = true
    public var showsPlaceholder: Bool = false
    public var placeholderTextColor: Color = Color(uiColor: .mvmCoolGray3)
    public var placeholderFontStyle: Styler.Font = Styler.Font.RegularMicro
    
    public var isValid: Bool? {
        didSet { updateUI?() }
    }
    
    /// Temporary binding mechanism for the view to update on enable changes.
    public var updateUI: ActionBlock?
    
    //--------------------------------------------------
    // MARK: - Validation Methods
    //--------------------------------------------------
    
    public func formFieldValue() -> AnyHashable? {
        return text
    }
    
    public func setValidity(_ valid: Bool, rule: RulesProtocol) {
        self.isValid = valid
    }
    
    //--------------------------------------------------
    // MARK: - Keys
    //--------------------------------------------------
    
    private enum CodingKeys: String, CodingKey {
        case moleculeName
        case backgroundColor
        case editable
//        case groupName
        case textAlignment
    }
    
    //--------------------------------------------------
    // MARK: - Codec
    //--------------------------------------------------
    
    required public init(from decoder: Decoder) throws {
        let typeContainer = try decoder.container(keyedBy: CodingKeys.self)
        
        if let editable = try typeContainer.decodeIfPresent(Bool.self, forKey: .editable) {
            self.editable = editable
        }
        
//        if let groupName = try typeContainer.decodeIfPresent(String.self, forKey: .groupName) {
//            self.groupName = groupName
//        }
        
        if let textAlignment = try typeContainer.decodeIfPresent(NSTextAlignment.self, forKey: .textAlignment) {
            self.textAlignment = textAlignment
        }
        
    }
    
    public func encode(to encoder: Encoder) throws {
        var container = encoder.container(keyedBy: CodingKeys.self)
//        try container.encode(groupName, forKey: .groupName)
        try container.encode(editable, forKey: .editable)
        try container.encode(textAlignment, forKey: .textAlignment)
    }
}