import SwiftUI
 
struct ContentView: View {
    private var waluty: [String] = ["Euro", "Dolar", "Funt", "Frank"]
    @State var walutaDoKupienia: String = ""
    @State var walutaDoZaplacenia: String = ""
    @State private var inputText = ""
    @State private var response : String = ""
    var currencyDict = ["Euro":["Euro":1.0, "Dolar":1.09, "Funt":0.88, "Frank":0.99],
                        "Dolar":["Euro":0.91, "Dolar":1.0, "Funt":0.81, "Frank":0.91],
                        "Funt":["Euro":1.12, "Dolar":1.23, "Funt":1.0, "Frank":1.12],
                        "Frank":["Euro":1.00, "Dolar":1.09, "Funt":0.88, "Frank":1.0]]
 
    var body: some View {
        VStack{
            Text("Kantor").bold()
            Image("myImage").resizable()
                .frame(width: 300, height: 300, alignment: .bottom)
            Text("Waluta, którą chcesz kupić")
                Picker(selection: $walutaDoKupienia,
                       label:Text("Waluty")) {
                        ForEach(waluty, id: \.self) {
                            Text($0)
                        }
                }
            .pickerStyle(SegmentedPickerStyle())
            .padding()
                Text("Waluta, którą chcesz zapłacić")
            Picker(selection: $walutaDoZaplacenia,
                           label:Text("Firmy")) {
                            ForEach(waluty, id: \.self) {
                                Text($0)
                            }
                    }
                .pickerStyle(SegmentedPickerStyle())
                .padding()
            TextField("Podaj ilość waluty, którą chcesz kupić", text: $inputText,
                             onCommit: {
                                let toBuyCurrency = self.walutaDoKupienia
                                let toSellCurrency = self.walutaDoZaplacenia
                                let number = Double(self.inputText)
 
                                let ratio = ((self.currencyDict[toBuyCurrency]![toSellCurrency])!)
 
                                self.response = "Ilość waluty do zapłacenia: " + String(Double(round(number! * ratio*100)/100))
                }).padding()
            Text(verbatim: response)
         }
    }
}
 
struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}