Txt read/write

from os import listdir
from tkinter import *
from tkinter.scrolledtext import ScrolledText

current_file = "test.txt"
files = listdir()

def on_select(event):
    """Handles the file selection from the listbox."""
    selected_index = files_list.curselection()  # Get the index of selected item
    if selected_index:
        selected_item = files_list.get(selected_index)
        file_entry.delete(0, END)
        file_entry.insert(1, selected_item[:-4])  # Remove '.txt' extension for display

def save_file():
    """Saves the content of the text field into the current file."""
    with open(current_file, "w+", encoding="utf-8") as f:
        f.write(text_field.get(1.0, END))

def reset_file():
    """Clears the text field."""
    text_field.delete(1.0, END)

def get_file():
    """Loads the content of the current file into the text field."""
    try:
        with open(current_file, "r+", encoding="utf-8") as f:
            text_field.insert(1.0, f.read())
    except FileNotFoundError:
        print(f"File {current_file} not found.")
        reset_file()

def open_file():
    """Opens the file entered by the user in the entry field."""
    global current_file
    new_file = file_entry.get().strip()

    if not new_file:
        print("No file name provided.")
        return

    current_file = new_file + ".txt"  # Open file with .txt extension

    try:
        with open(current_file, "r+", encoding="utf-8") as f:
            reset_file()
            text_field.insert(1.0, f.read())
        print(f"Текущий файл: {current_file}")
    except FileNotFoundError:
        print(f"File {current_file} not found.")
        reset_file()

root = Tk()  # Create main window

# Configure window parameters
root['bg'] = "#fff9ed"
root.geometry('800x600')
root.title("Окно Tkinter")

# Text field with scroll functionality
text_field = ScrolledText(root, wrap=WORD)
text_field.place(relx=0.5, rely=0.33, anchor=CENTER)

# List of files in the current directory
files_list = Listbox(root)
for file in files:
    if file.endswith(".txt"):  # Only include .txt files
        files_list.insert(END, file)

# Bind event to handle file selection
files_list.bind('<<ListboxSelect>>', on_select)

# Buttons for actions
save_button = Button(root, text="Сохранить", command=save_file)
reset_button = Button(root, text="Сброс", command=reset_file)
open_button = Button(root, text="Открыть файл", command=open_file)
file_entry = Entry(root)

# Place buttons and entry field
save_button.place(relx=0.15, rely=0.7)
reset_button.place(relx=0.25, rely=0.7)
open_button.place(relx=0.45, rely=0.7)
file_entry.place(relx=0.60, rely=0.7)
files_list.place(relx=0.60, rely=0.75)

# Initialize file reading (default file loading)
get_file()

# Start the Tkinter main loop
root.mainloop()