from tkinter import *

alphabetfor10 = ['0', '1', '2', '3', '4', '5', '6', '7', '8', '9']
alphabetfor5 = ['0', '1', '2', '3', '4']

max_10_num = 95367431640624
max_len_num = 20
max_5_num = 232023300444444444
def show_buttons():  # Показывает кнопки начальной вкладки

    btncalc.grid(padx = 10, pady = 10, row=0, column=0, sticky='w')
    entry.grid(pady = 10, row=0, column=1, sticky = 'w')
    entry2.grid(row=1, column=1, sticky = 'w')
    if choice.get() == 0:
        label_ten.place(x = 220, y = 10)
        label_five.place(x=220, y = 45)
    else:
        label_five.place(x=220, y=10)
        label_ten.place(x=220, y=45)
    from10to5.grid(row=2, column=1)
    from5to10.grid(row=3, column=1)
    btn7.grid(row=2, column=0, sticky='w', ipadx=10, ipady=10)
    btn8.grid(row=2, column=1, sticky='w', ipadx=10, ipady=10)
    btn9.grid(row=2, column=2, sticky='w', ipadx=10, ipady=10)
    btn4.grid(row=3, column=0, sticky='w', ipadx=10, ipady=10)
    btn5.grid(row=3, column=1, sticky='w', ipadx=10, ipady=10)
    btn6.grid(row=3, column=2, sticky='w', ipadx=10, ipady=10)
    btn1.grid(row=4, column=0, sticky='w', ipadx=10, ipady=10)
    btn2.grid(row=4, column=1, sticky='w', ipadx=10, ipady=10)
    btn3.grid(row=4, column=2, sticky='w', ipadx=10, ipady=10)
    btnm.grid(row=5, column=0, sticky='w', ipadx=10, ipady=10)
    btn0.grid(row=5, column=1, sticky='w', ipadx=10, ipady=10)
    btndot.grid(row=5, column=2, sticky='w', ipadx=11, ipady=10)

def swap():
    entry2.config(state = NORMAL)
    entry.delete(0, END)
    entry2.delete(0, END)
    entry2.config(state = DISABLED)
    if choice.get() == 0:
        label_ten.place(x = 220, y = 10)
        label_five.place(x=220, y = 45)
    else:
        label_five.place(x=220, y=10)
        label_ten.place(x=220, y=45)

def checkChoice(event):  # Проверяем в какую систему из какой переводить
    try:
        if len(entry.get()) > 20:
            entry.delete(0, END)
            entry.insert(0, 'number too long')
        else:
            if choice.get() == 0:
                if float(entry.get()) > max_10_num:
                    entry.delete(0, END)
                    entry.insert(0, 'number too big')
                else: f10to5()
            else:
                if float(entry.get()) > max_5_num:
                    entry.delete(0, END)
                    entry.insert(0, 'number too big')
                else: f5to10()
    except ValueError:
        entry.delete(0, END)
        entry.insert(0, 'Некорректный ввод')


def fieldRemove():  # Удаляем последний написанный символ
    field = entry.get()
    entry.delete(0, END)
    entry.insert(0, field[0:-1])


def checkEntry(event):  # Проверяем правильность введёного символа
    symbol = event.char
    print(entry.get())
    if (len(symbol) != 0 and ord(symbol) != 13):
        if (entry.get()[0:14] == 'number too big'): entry.delete(0, 14)
        elif (entry.get()[0:15] == 'number too long'): entry.delete(0, 15)
        elif (entry.get()[0:17] == 'Некорректный ввод'): entry.delete(0, 17)
    #print(ord(symbol))
    if symbol == '': pass
    elif len(symbol) != 0 and ord(symbol) == 13: pass
    elif (symbol == '-' and len(entry.get()) != 1): fieldRemove()
    elif len(entry.get()) == 1 and (symbol == '0' or symbol == '.'): fieldRemove()
    elif symbol == '.' and '.' in entry.get()[0: -1]: fieldRemove()
    elif (choice.get() == 0 and ((symbol not in (alphabetfor10))
        and symbol != '-' and symbol != '.')): fieldRemove()
    elif (choice.get() == 1 and ((symbol not in (alphabetfor5))
        and symbol != '-' and symbol != '.')): fieldRemove()



def clear():  # Очищаем поле ввода
    entry.delete(0, END)
    entry2.delete(0, END)

def btnprint(value):  # Функция для печати кнопок с окна
    if (entry.get()[0:14] == 'number too big'):
        entry.delete(0, 14)
    elif (entry.get()[0:15] == 'number too long'):
        entry.delete(0, 15)
    elif (entry.get()[0:17] == 'Некорректный ввод'):
        entry.delete(0, 17)
    if (entry.get() == 'number too big' or
    entry.get() == 'number too long' or
    entry.get() == 'Некорректный ввод'): entry.delete(0, END)
    if ((value == '-' and len(entry.get()) != 0)
    or (len(entry.get()) == 0 and (value == '0' or value == '.'))
    or (value == '.' and '.' in entry.get())): pass
    else:
        entry.insert(END, str(value))

def prog():  # Переключение на начальный экран
    label_about.grid_forget()
    show_buttons()


def about():  # Переключение на экран "Информация"
    entry2.grid_forget()
    btncalc.grid_forget()
    entry.grid_forget()
    label_ten.place_forget()
    label_five.place_forget()
    from10to5.grid_forget()
    from5to10.grid_forget()
    btn7.grid_forget()
    btn8.grid_forget()
    btn9.grid_forget()
    btn4.grid_forget()
    btn5.grid_forget()
    btn6.grid_forget()
    btn1.grid_forget()
    btn2.grid_forget()
    btn3.grid_forget()
    btn0.grid_forget()
    btnm.grid_forget()
    btndot.grid_forget()

    label_about.grid(row = 0, column = 0, pady = 130, padx = 35)





def f10to5():  # Перевод из 10 в 5 с.с.
    num = entry.get()
    have_num = False
    if num == '': return
    #entry.delete(0, END)
    dot = False
    negative = False
    for i in range(len(num)):
        if num[i] not in alphabetfor10:
            if i == 0 and num[i] == '-' and len(num) != 1:
                negative = True
            elif dot == False and num[i] == '.' and i != 0 and len(num) != 1:
                dot = True
            else:
                entry.insert(0, 'Некорректный ввод')
                return
        else:
            if dot == True and have_num == False:
                entry.insert(0, 'Некорректный ввод')
                return
            else: have_num = True

    if negative and dot and len(num) == 2:
        entry.insert(0, 'Некорректный ввод')
        return
    num = num.split('.')
    if negative: num[0] = num[0][1:]
    intgr10 = int(num[0])  # Целая часть десятичная числа
    remainder10 = []  # Остатки от деления десятичного числа на 5
    while intgr10 > 5:
        remainder10.append(str(intgr10%5))
        intgr10 //= 5
    remainder10.append(str(intgr10))
    intpart = ''  # Целая часть пятиричного числа
    remainder10.reverse()  # Остатки записываем в обратном порядке !!!
    for i in remainder10:
        intpart += i

    if dot:
        fract10 = float('0.' + str(num[1]))  # Дробная часть 10 числа
        fract5 = []  # Целые части от умножения дробной части числа на 5
        for i in range(8):
            fract10 *= 5
            if fract10 > 0:
                fract5.append(str(int(fract10)))
                fract10 -= int(fract10)
            elif fract10 == 0:
                break
        fractpart = ''  # Дробая часть пятиричного числа
        for i in fract5:
            fractpart += i

        intpart += '.' + fractpart

    if negative: intpart = '-' + intpart

    entry2.config(state=NORMAL)
    entry2.delete(0, END)
    entry2.insert(0, intpart)
    entry2.config(state=DISABLED)



def f5to10():  # Перевод из 5 в 10 с.с.
    num = entry.get()
    if num == '': return
    #entry.delete(0, END)
    dot = False
    negative = False
    for i in range(len(num)):
        if num[i] not in alphabetfor5:
            if i == 0 and num[i] == '-' and len(num) != 1:
                negative = True
            elif dot == False and num[i] == '.' and i != 0 and len(num) != 1:
                dot = True
            else:
                entry.delete(0, END)
                entry.insert(0, 'Некорректный ввод')
                return
    num = num.split('.')
    if negative and dot and len(num[0]) == 1:
        entry.insert(0, 'Некорректный ввод')
        return
    numeral = 0  # Демятичное число, которое должно получится
    intgr5 = str(num[0])  # Целая часть пятиричного числа
    if negative: intgr5 = intgr5[1:]
    intgr5 = list(intgr5)
    intgr5.reverse()
    coeff = 1  # Коэффициент, на который необходимо умножить разряд для перевода
    for i in intgr5:
        numeral += int(i)*coeff
        coeff *= 5
    if dot:
        remainder5 = str(num[1])  # Дробная часть 5 числа
        coeff = 0.2
        for i in remainder5:
            numeral += int(i)*coeff
            coeff /= 5

    if negative: numeral = -numeral
    numeral = str(numeral)

    entry2.config(state=NORMAL)
    entry2.delete(0, END)
    entry2.insert(0, numeral)
    entry2.config(state=DISABLED)




window = Tk()

window.title('Calculator')
window.geometry('320x350+0+0')
#window.grid_columnconfigure(0, weight=1)
frame = Frame(window)
frame2 = Frame(window)
mainMenu = Menu(window)
window.config(menu=mainMenu)
field = StringVar()
entry = Entry(frame, textvariable = field)#, command = checkEntry)
entry.bind("<Return>", checkChoice)
entry.bind("<Any-KeyRelease>", checkEntry)
entry2 = Entry(frame, state = 'readonly')

label_ten =  Label(text = 'Десятичная с.с.')
label_five =  Label(text = 'Пятиричная с.с.')
label_about = Label(window, text='Данная программа была создана усилиями\n '
    'Колосова Дениса Витальевича\n Студента кафедры ИУ-7 группы 22-Б\n МГТУ '
    'им. Н.Э. Баумана', padx = 0, pady = 0)

mainMenu.add_command(label = 'Программа', command = prog)
mainMenu.add_command(label = 'Очистка поля ввода', command = clear)
mainMenu.add_command(label = 'О программе', command = about)
choice = IntVar()
choice.set(0)
from10to5 = Radiobutton(frame, text = 'Из десятичной в пятиричную', variable = choice, value = 0, command = swap)
from5to10 = Radiobutton(frame, text = 'Из пятиричной в десятичную', variable = choice, value = 1, command = swap)



btncalc = Button(frame, text = 'Перевести', command = lambda: checkChoice(0))
btn1 = Button(frame2, text = '1', command = lambda: btnprint('1'))
btn2 = Button(frame2, text = '2', command = lambda: btnprint('2'))
btn3 = Button(frame2, text = '3', command = lambda: btnprint('3'))
btn4 = Button(frame2, text = '4', command = lambda: btnprint('4'))
btn5 = Button(frame2, text = '5', command = lambda: btnprint('5'))
btn6 = Button(frame2, text = '6', command = lambda: btnprint('6'))
btn7 = Button(frame2, text = '7', command = lambda: btnprint('7'))
btn8 = Button(frame2, text = '8', command = lambda: btnprint('8'))
btn9 = Button(frame2, text = '9', command = lambda: btnprint('9'))
btn0 = Button(frame2, text = '0', command = lambda: btnprint('0'))
btndot = Button(frame2, text = '.', command = lambda: btnprint('.'))
btnm = Button(frame2, text = '-', command = lambda: btnprint('-'))

show_buttons()

frame.grid(sticky = 'w')
frame2.grid(sticky = 'w', padx = 75)
window.mainloop()