class Screen2(tk.Frame):
    def __init__(self, master):
        tk.Frame.__init__(self, master, bg='#bcfef9')

        # Load users from users.json if it exists and is not empty
        self.users = self.get_users_from_file()

        # Label for instructions
        tk.Label(self, text="Start typing your public key to find yourself in the list", bg='#bcfef9').pack(anchor='nw')

        # Entry box for user search
        self.search_var = tk.StringVar()
        self.search_var.trace('w', self.update_users_list)
        self.search_entry = tk.Entry(self, textvariable=self.search_var, width=50)
        self.search_entry.pack(anchor='nw')

        # Refresh button
        refresh_button = tk.Button(self, text="Refresh List", command=self.refresh_users, height=3, width=30, bg='peach puff')
        refresh_button.place(relx=0.25, rely=0, anchor='nw')

        # The 'Done' button to navigate to next screen
        done_button = tk.Button(self, text="Done", command=lambda: master.switch_frame(Screen3), height=3, width=30, bg='peach puff')
        done_button.pack(pady=10)

        # Container for user list
        self.container = ttk.Frame(self)
        self.container.pack(fill='both', expand=True)

        # Display initial list of users
        self.update_users_list()

    def get_users_from_file(self):
        # Load users from users.json if it exists and is not empty
        if os.path.exists("users.json") and os.path.getsize("users.json") > 0:
            with open("users.json", 'r') as f:
                try:
                    users = json.load(f)
                except json.JSONDecodeError:
                    print("users.json is not valid JSON. Refreshing users...")
                    users = self.refresh_users()
        else:
            users = self.refresh_users()
        return users

    def refresh_users(self):
        # Update users list from Scuttlebutt and display it
        users = self.get_scuttlebutt_users()
        self.users = users
        self.update_users_list()

    def get_scuttlebutt_users(self):
        result = subprocess.run(['node', 'scuttlebot.js'], capture_output=True, text=True)
        if result.returncode == 0:
            users = json.loads(result.stdout)
            # Save the users list to a JSON file
            with open('users.json', 'w') as f:
                json.dump(users, f)
        else:
            print("Command failed: " + result.stderr)
            users = []
        return users

    def update_users_list(self, *args):
        search_text = self.search_var.get().lower()

        # Remove current users list
        for widget in self.container.winfo_children():
            widget.destroy()

        # Filtered list of users
        users = [user for user in self.users if search_text in user['id'].lower()]

        self.display_users(users)

    def display_users(self, users):
        # Scrollable list of users
        canvas = tk.Canvas(self.container)
        scrollbar = ttk.Scrollbar(self.container, orient='vertical', command=canvas.yview, width=60)
        scrollable_frame = ttk.Frame(canvas)

        scrollable_frame.bind(
            "<Configure>",
            lambda e: canvas.configure(
                scrollregion=canvas.bbox("all")
            )
        )

        canvas.create_window((0, 0), window=scrollable_frame, anchor="nw")
        canvas.configure(yscrollcommand