import SwiftUI

struct ContentView: View {
    @State private var showingLoginAlert = false
    @State private var login = ""
    @State private var password = ""
    @State private var showingLoginFailedAlert = false

    var body: some View {
        NavigationView {
            VStack {
                Spacer()

                Text("Witamy w X")
                    .font(.largeTitle)
                    .padding(.bottom, 10)

                Text("Wybierz sposób logowania")
                    .font(.subheadline)
                    .padding(.bottom, 40)

                VStack(spacing: 20) {
                    NavigationLink(destination: GuestPhotoGridView()) {
                        Text("Jako gość")
                            .font(.headline)
                            .frame(minWidth: 0, maxWidth: .infinity)
                            .padding()
                            .background(Color.blue)
                            .foregroundColor(.white)
                            .cornerRadius(10)
                    }

                    Button(action: {
                        showingLoginAlert = true
                    }) {
                        Text("Zaloguj się")
                            .font(.headline)
                            .frame(minWidth: 0, maxWidth: .infinity)
                            .padding()
                            .background(Color.green)
                            .foregroundColor(.white)
                            .cornerRadius(10)
                    }
                    .alert(isPresented: $showingLoginAlert) {
                        Alert(title: Text("Logowanie"),
                              message: VStack {
                                TextField("Login", text: $login)
                                    .textFieldStyle(RoundedBorderTextFieldStyle())
                                    .padding(.bottom, 10)
                                SecureField("Hasło", text: $password)
                                    .textFieldStyle(RoundedBorderTextFieldStyle())
                              }.padding(),
                              primaryButton: .default(Text("OK"), action: {
                                if login == "TestUser" && password == "TestPassword" {
                                    showingLoginFailedAlert = false
                                    login = ""
                                    password = ""
                                    // Navigate to user photo grid view
                                    if let window = UIApplication.shared.windows.first {
                                        window.rootViewController = UIHostingController(rootView: UserPhotoGridView())
                                        window.makeKeyAndVisible()
                                    }
                                } else {
                                    showingLoginFailedAlert = true
                                }
                              }),
                              secondaryButton: .cancel(Text("Anuluj")))
                    }
                    .alert(isPresented: $showingLoginFailedAlert) {
                        Alert(title: Text("Błąd"),
                              message: Text("Nieprawidłowy login lub hasło"),
                              primaryButton: .default(Text("OK")),
                              secondaryButton: .default(Text("Zaloguj jako gość"), action: {
                                // Navigate to guest photo grid view
                                if let window = UIApplication.shared.windows.first {
                                    window.rootViewController = UIHostingController(rootView: GuestPhotoGridView())
                                    window.makeKeyAndVisible()
                                }
                              }))
                    }
                }
                .padding(.horizontal, 40)

                Spacer()
            }
            .navigationBarTitle("Ekran Logowania", displayMode: .inline)
        }
    }
}

struct GuestPhotoGridView: View {
    var body: some View {
        Text("Photo Grid View for Guest")
    }
}

struct UserPhotoGridView: View {
    var body: some View {
        VStack {
            Text("Photo Grid View for User")
            Button(action: {
                // Action to add a recipe (not implemented yet)
            }) {
                Text("Dodaj przepis")
                    .font(.headline)
                    .padding()
                    .background(Color.orange)
                    .foregroundColor(.white)
                    .cornerRadius(10)
            }
        }
    }
}

struct ContentView_Previews: PreviewProvider {
    static var previews: some View {
        ContentView()
    }
}