import SwiftUI

struct ContentView: View {
    @State private var showingLoginSheet = false
    @State private var login = ""
    @State private var password = ""
    @State private var showingPassword = false
    @State private var showingLoginFailedAlert = false
    @State private var loginFailedMessage = ""
    @State private var isUserLoggedIn = false

    var body: some View {
        NavigationView {
            if isUserLoggedIn {
                UserPhotoGridView(isUserLoggedIn: $isUserLoggedIn)
            } else {
                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: {
                            showingLoginSheet = true
                        }) {
                            Text("Zaloguj się")
                                .font(.headline)
                                .frame(minWidth: 0, maxWidth: .infinity)
                                .padding()
                                .background(Color.green)
                                .foregroundColor(.white)
                                .cornerRadius(10)
                        }
                        .sheet(isPresented: $showingLoginSheet) {
                            VStack {
                                Text("Logowanie")
                                    .font(.headline)
                                    .padding()

                                TextField("Login", text: $login)
                                    .autocapitalization(.none)  // Zapobiega automatycznej kapitalizacji
                                    .textFieldStyle(RoundedBorderTextFieldStyle())
                                    .padding()

                                if showingPassword {
                                    TextField("Hasło", text: $password)
                                        .textFieldStyle(RoundedBorderTextFieldStyle())
                                        .padding()
                                } else {
                                    SecureField("Hasło", text: $password)
                                        .textFieldStyle(RoundedBorderTextFieldStyle())
                                        .padding()
                                }

                                Button(action: {
                                    showingPassword.toggle()
                                }) {
                                    HStack {
                                        Image(systemName: showingPassword ? "eye.slash.fill" : "eye.fill")
                                        Text(showingPassword ? "Ukryj hasło" : "Pokaż hasło")
                                    }
                                    .font(.subheadline)
                                    .foregroundColor(.blue)
                                }
                                .padding(.bottom, 20)

                                if showingLoginFailedAlert {
                                    Text(loginFailedMessage)
                                        .foregroundColor(.red)
                                        .padding()
                                }

                                HStack {
                                    Button("Anuluj") {
                                        showingLoginSheet = false
                                    }
                                    .padding()

                                    Button("OK") {
                                        if login == "TestUser" && password == "TestPassword" {
                                            showingLoginFailedAlert = false
                                            login = ""
                                            password = ""
                                            showingLoginSheet = false
                                            isUserLoggedIn = true
                                        } else {
                                            loginFailedMessage = "Nieprawidłowy login lub hasło"
                                            showingLoginFailedAlert = true
                                        }
                                    }
                                    .padding()
                                }
                            }
                            .padding()
                        }
                    }
                    .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 {
    @Binding var isUserLoggedIn: Bool

    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)
            }
            .padding()

            Button(action: {
                isUserLoggedIn = false
            }) {
                Text("Wyloguj się")
                    .font(.headline)
                    .padding()
                    .background(Color.red)
                    .foregroundColor(.white)
                    .cornerRadius(10)
            }
            .padding()
        }
    }
}

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