---

import tkinter as tk
from tkinter import messagebox

FILE_NAME = "quotes.txt"


def read_file():
    try:
        with open(FILE_NAME, "r", encoding="utf-8") as file:
            return file.read()
    except FileNotFoundError:
        return ""


def add_quote():
    quote = quote_entry.get().strip()
    author = author_entry.get().strip()

    if not quote or not author:
        messagebox.showwarning(
            "Ошибка", "Введите цитату и автора!"
        )
        return

    with open(FILE_NAME, "a", encoding="utf-8") as file:
        file.write(quote + "\n")
        file.write("(" + author + ")\n\n")

    quote_entry.delete(0, tk.END)
    author_entry.delete(0, tk.END)
    update_text()
    messagebox.showinfo("Готово", "Цитата добавлена!")


def update_text():
    text_area.delete("1.0", tk.END)
    text_area.insert(tk.END, read_file())


def show_authors():
    authors = []

    for line in read_file().splitlines():
        line = line.strip()
        if line.startswith("(") and line.endswith(")"):
            authors.append(line)

    messagebox.showinfo(
        "Список авторов",
        "\n".join(authors) if authors else "Авторов пока нет"
    )


root = tk.Tk()
root.title("Цитаты и авторы")
root.geometry("600x550")

tk.Label(
    root, text="Содержимое файла quotes.txt",
    font=("Arial", 14, "bold")
).pack(pady=5)

text_area = tk.Text(root, height=12, width=65)
text_area.pack(padx=10, pady=5)

tk.Label(root, text="Введите цитату:").pack()
quote_entry = tk.Entry(root, width=65)
quote_entry.pack(padx=10, pady=5)

tk.Label(root, text="Введите автора:").pack()
author_entry = tk.Entry(root, width=65)
author_entry.pack(padx=10, pady=5)

tk.Button(
    root, text="Добавить цитату",
    command=add_quote
).pack(pady=8)

tk.Button(
    root, text="Показать всех авторов",
    command=show_authors
).pack(pady=5)

tk.Button(
    root, text="Обновить файл",
    command=update_text
).pack(pady=5)

update_text()
root.mainloop()