from customtkinter import *
from tkinter.filedialog import askopenfilename, asksaveasfilename

class Notepad(CTk):
    def __init__(self):
        """Initialize the Notepad application."""
        super().__init__()
        self.title("Notepad")
        self.iconbitmap("images/notepad.ico")
        self.geometry("600x600")
        self.configure(padx=10, pady=10)

        # file path
        self.file = None

         # Create a Frame for the menu and textarea
        self.frame = CTkFrame(self)
        self.frame.pack(fill="both", expand=True, padx=10, pady=10)

        # file menu
        self.File_var = StringVar(value="File")
        self.filemenu = CTkOptionMenu(self.frame,values=["File", "New", "Open", "Save"],
                                         command=self.file_menu_callback,
                                         variable=self.File_var,button_color="black", fg_color="black")
        
        self.filemenu.grid(row=0, column=0, padx=10, pady=10, sticky="w")

        # Textbox to get text
        self.textarea = CTkTextbox(self.frame, font=("Consolas", 11))
        self.textarea.grid(row=1,column=0,columnspan=2, padx=10, pady=10, sticky="nsew")
        # create CTk scrollbar
        # It only appears in full screen mode
        ctk_textbox_scrollbar = CTkScrollbar(self.frame, command=self.textarea.yview)
        ctk_textbox_scrollbar.grid(row=1,column=1, sticky="ns")

        # connect textbox scroll event to CTk scrollbar
        self.textarea.configure(yscrollcommand=ctk_textbox_scrollbar.set)


        # Bind the <Configure> event to the resize_textarea function
        self.bind("<Configure>", self.resize_textarea)

    # event is needed to bind it to resize event
    def resize_textarea(self, event):
        """Adjust the size of the textarea based on the available space."""
        # Calculate the new width and height for the textarea based on the available space
        available_width = self.winfo_width() - 40  # Subtract the padding
        available_height = self.winfo_height() - 40  # Subtract the padding

        # Update the width and height of the textarea
        self.textarea.configure(width=available_width, height=available_height)

    def file_menu_callback(self,choice):
        """Handle the file menu commands."""
        if choice=='New':
            self.new()
        elif choice=='Open':
            self.open()
        elif choice=='Save':
            self.save()

    def new(self):
        """Create a new file."""
        self.file = None
        self.title("Notepad")
        self.textarea.focus_set()
        self.textarea.delete("0.0", 'end')

    def open(self):
        """Open an existing file."""
        self.file = askopenfilename(defaultextension=".txt",
                           filetypes=[("All Files", "*.*"),
                                     ("Text Documents", "*.txt")])
        if self.file == "":
            self.file = None
        else:
            self.title(os.path.basename(self.file))
            self.textarea.delete("0.0", 'end')
            with open(self.file, 'r') as f:
                self.textarea.insert("0.0", f.read())

    def save(self):
        """Save the current file."""
        if self.file == None:
            self.file = asksaveasfilename(initialfile = 'Untitled.txt', defaultextension=".txt",
                           filetypes=[("All Files", "*.*"),
                                     ("Text Documents", "*.txt")])
            if self.file =="":
                self.file = None
            else:
                with open(self.file, 'w') as f:
                    f.write(self.textarea.get("0.0", "end"))



if __name__ == '__main__':
    app = Notepad()
    app.mainloop()