import SwiftUI

struct CheckoutForm: View {
    @State private var cardNumber = ""
    @State private var cardExpiryDate = ""
    @State private var cardCVV = ""
    @State private var cardName = ""
    @State private var shippingAddress = ""
    @State private var billingAddress = ""
    @State private var isFormValid = false

    var body: some View {
        VStack {
            HStack {
                Text("Credit Card Number")
                Spacer()
            }
            TextField("Enter credit card number", text: $cardNumber)
                .autocapitalization(.none)
                .keyboardType(.numberPad)
                .padding()
                .background(Color.gray.opacity(0.2))
                .cornerRadius(8)
                .padding(.horizontal)
                .onChange(of: cardNumber) { newValue in
                    validateForm()
                }

            HStack {
                Text("Expiry Date")
                Spacer()
            }
            TextField("MM/YY", text: $cardExpiryDate)
                .autocapitalization(.none)
                .keyboardType(.numberPad)
                .padding()
                .background(Color.gray.opacity(0.2))
                .cornerRadius(8)
                .padding(.horizontal)
                .onChange(of: cardExpiryDate) { newValue in
                    validateForm()
                }

            HStack {
                Text("CVV")
                Spacer()
            }
            TextField("Enter CVV", text: $cardCVV)
                .autocapitalization(.none)
                .keyboardType(.numberPad)
                .padding()
                .background(Color.gray.opacity(0.2))
                .cornerRadius(8)
                .padding(.horizontal)
                .onChange(of: cardCVV) { newValue in
                    validateForm()
                }

            HStack {
                Text("Name on Card")
                Spacer()
            }
            TextField("Enter name on card", text: $cardName)
                .autocapitalization(.words)
                .padding()
                .background(Color.gray.opacity(0.2))
                .cornerRadius(8)
                .padding(.horizontal)
                .onChange(of: cardName) { newValue in
                    validateForm()
                }

            HStack {
                Text("Shipping Address")
                Spacer()
            }
            TextField("Enter shipping address", text: $shippingAddress)
                .padding()
                .background(Color.gray.opacity(0.2))
                .cornerRadius(8)
                .padding(.horizontal)

            HStack {
                Text("Billing Address")
                Spacer()
            }
            TextField("Enter billing address", text: $billingAddress)
                .padding()
                .background(Color.gray.opacity(0.2))
                .cornerRadius(8)
                .padding(.horizontal)

            Button(action: {
                // process payment
            }, label: {
                Text("Place Order")
                    .foregroundColor(.white)
                    .frame(maxWidth: .infinity)
                    .padding()
            })
            .disabled(!isFormValid)
            .background(isFormValid ? Color.blue : Color.gray)
            .cornerRadius(8)
            .padding()
        }
        .navigationTitle("Checkout Form")
        .padding()
    }

    func validateForm() {
        isFormValid = !cardNumber.isEmpty && cardExpiryDate.count == 5 && !cardCVV.isEmpty && !cardName.isEmpty
    }
}

struct CheckoutForm_Previews: PreviewProvider {
    static var previews: some View {
        NavigationView {
            CheckoutForm()
        }
    }
}

This code creates a basic checkout form with fields for credit card information and addresses.
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