# Zeiterfassung
# UI Definitionen

import tkinter as tk
import locale
locale.setlocale(locale.LC_ALL, '')

from time import strftime
from definitions import app_title, app_version

# Pinpad

class win_pinpad(tk.Toplevel):
    def __init__(self, parent):
        super().__init__(parent)

        def update_time():
            string_time = strftime('%A, der %d.%m.%Y - %H:%M:%S')
            nonlocal digital_clock
            digital_clock.config(text=string_time)
            digital_clock.after(1000, update_time)

        self.title(app_title + " " + app_version)

        # Digital clock label configuration
        digital_clock = tk.Label(self)
        digital_clock.grid(row=0, column=0, columnspan=3, padx=10, pady=10)
        # Initial call to update_time function
        update_time()

        # Benutzernummer
        def usernr_changed(UserNr):
            nonlocal usernr
            if len(str(usernr.get())) > 0:
                buttons["OK"].configure(state="active")
            else:
                buttons["OK"].configure(state="disabled")


        tk.Label(self, text="Benutzernummer:").grid(row=1, column=0)
        UserNr = tk.StringVar()
        UserNr.trace("w", lambda name, index, mode, UserNr=UserNr: usernr_changed(UserNr))
        usernr = tk.Entry(self, width=10, textvariable=UserNr)
        usernr.grid(row=1,column=1)

       # Pinpad

        def buttonPress(key):

            nonlocal usernr
            if type(key) is int:
                if key < 10:
                    usernr.insert('end', str(key))
            if key =="OK":
              print("OK pressed")
            if key == "<-":
                usernr.delete(usernr.index("end") - 1 )
            if len(usernr.get()) > 0:
                buttons["OK"].configure(state="active")
            else:
                buttons["OK"].configure(state="disabled")

        # Buttons definieren
        button_width = 7
        button_height = 3
        pinframe = tk.Frame(self)
        pinframe.grid(row=2, column=0, columnspan=3, padx=10, pady=10)
        buttons = { }

        keys = [
            [ 1, 2, 3],
            [ 4, 5, 6],
            [ 7, 8, 9],
            [ "<-", 0, "OK"]
        ]

        for y, row in enumerate(keys, 1):
            for x, key in enumerate(row):
                button = tk.Button(pinframe, width=button_width, height=button_height, text=key, command=lambda key=key: buttonPress(key))
                button.grid(row=y, column=x)
                buttons[key] = button

        buttons["OK"].configure(state="disabled")

        usernr.focus_set()

class mainwindow(tk.Tk):
    def __init__(self):
        super().__init__()

        self.geometry('300x200')
        self.title('Main Window')

        # place a button on the root window
        tk.Button(self,
                   text='Login Window',
                   command=self.open_window).pack(expand=True)

    def open_window(self):
        window = win_pinpad(self)
        window.grab_set()


if __name__ == "__main__":
    app = mainwindow()
    app.mainloop()