//
//  ContentView.swift
//  Cotharticren
//
//  Created by Justin Venable on 8/4/21.
//
import Foundation
import SwiftUI
import CoreData
import Combine



struct ContentView: View {
    @State var orbit: String = ""

    let formatter: NumberFormatter = {
            let formatter = NumberFormatter()
            formatter.numberStyle = .decimal
            return formatter
        }()

    var body: some View {
        VStack(alignment: .leading) {
        Image("orbit100")
            .clipShape(Circle())
            .shadow(radius: 3)
            .padding(.top, 10)
            .padding()
            .padding()
            Text("Orbit Radical Measurement")
                .font(.callout)
                .bold()
            TextField("#", value: self.$orbit, formatter: formatter)
            .onReceive(Just(self.orbit), perform: self.numericValidator)
                .textFieldStyle(RoundedBorderTextFieldStyle())
                .fixedSize(horizontal: true, vertical: /*@START_MENU_TOKEN@*/true/*@END_MENU_TOKEN@*/)
        }.padding()
    }


    func convertCelsiusToFarenheit(_ celsius) -> Int { celsius * 9 / 5 + 32 } //<--@reddit user helper i put //your code here


    func numericValidator(newValue: String) {
        if newValue.range(of: "^\\d+$", options: .regularExpression) != nil {
            self.orbit = newValue
        } else if !self.orbit.isEmpty {
            self.orbit = String(newValue.prefix(self.orbit.count - 1))
        }
    }
}
struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        Group {
            ContentView().environment(\.managedObjectContext, PersistenceController.preview.container.viewContext)
        }

    }
}