from tkinter import *
import tkinter as tk
from tkinter import messagebox

class Nodo:
    def __init__(self, dato):
        self.info = dato
        self.liga = None


class Pila:
    def __init__(self):
        self.primero = None
        self.ultimo = None

    def ultimo_dato(self):
        ultimo_n = self.primero
        while (ultimo_n.liga != None):
            ultimo_n = ultimo_n.liga
        return ultimo_n

    def anterior(self, dato):
        p = self.primero
        y = None

        while (p != dato):
            y = p
            p = p.liga
        return y

    def desconectar(self, x, y):
        self.ultimo = self.ultimo_dato()
        if (x != self.primero):
            y.liga = x.liga
            if (x == self.ultimo):
                self.ultimo = y
        else:
            self.primero = self.primero.liga
            if (self.primero == None):
                self.ultimo = None

    def Apilar(self, nuevo_nodo):
        if self.primero:

            ultimo_nodo = self.primero

            while ultimo_nodo.liga != None:
                ultimo_nodo = ultimo_nodo.liga
            ultimo_nodo.liga = nuevo_nodo

        else:
            self.primero = nuevo_nodo

    def DesApilar(self):
        if (self.primero == None):
            messagebox.showinfo(title="☠Advertencia☠", message="Subdesbordamiento - No hay contenedores")
        else:
            self.desconectar(self.ultimo_dato(), self.anterior(self.ultimo_dato()))

    def MostrarPila(self):
        temp = self.primero

        if self.primero == None:
            messagebox.showinfo(title="☠Advertencia☠", message="No hay contenedores")
        while temp != None:
            panel_resultado.insert(0, (temp.info))
            temp = temp.liga

        panel_resultado.insert(0, ("Contenedores: "))
        panel_resultado.insert(0, (" "))


pila = Pila()

# ---------------- Functions ----------------------------------------------
def menuSalir():
    op = messagebox.askquestion("Salir","¿Desea finalizar el programa?")

    if op == "yes":
        raiz.destroy()

def getNum():
    if panel_entrada.get() == "":
        messagebox.showinfo(title="☠Advertencia☠", message="Ingrese la descripción del contenedor")
    else:
        num = str(panel_entrada.get())
        pila.Apilar(Nodo(num))
    panel_entrada.delete(0,END)

def erase():
    pila.DesApilar()

def show():
    pila.MostrarPila()

def limpiar():
    panel_resultado.delete(0,END)


# --------------- Raiz ----------------------------------------------------
raiz = tk.Tk()
raiz.title("Pilas")
raiz.resizable(False,False)
raiz.geometry("400x460")
raiz.iconbitmap("Icono_Remington.ico")
raiz.config(relief="groove", bd=10, background="#BFB377")
numeroPantalla = StringVar()

barraMenu = Menu(raiz)
raiz.config(menu=barraMenu)

opcionesMenu = Menu(barraMenu, tearoff=0)
opcionesMenu.add_command(label="Salir", command=menuSalir)

barraMenu.add_cascade(label="Opciones", menu=opcionesMenu)

# ------------------ Frames -----------------------------------------------
frame1 = Frame(raiz)
frame1.place(x=50, y=310)
frame1.config(width=300, height=100, bg="white", relief="groove", bd=5)


# ------------------ widgets ----------------------------------------------
Label(raiz, text=" ❃Contenedores❃ ", fg="white", bg="#BFB377", font=("Impact", 30)).place(x=25, y=10)
Label(raiz, text=" ➤ Ingreso: ", fg="white", bg="#BFB377", font=("Impact", 20)).place(x=10, y=250)

panel_entrada = Entry(raiz)
panel_entrada.place(x=145, y=260)
panel_entrada.config(relief="sunken", bd=5)

panel_resultado = Listbox(raiz)
panel_resultado.config(width=35, height=10, borderwidth=5, relief="sunken", bd=5)
panel_resultado.place(x=80, y=72)

barra = Scrollbar(raiz)
barra.pack()
barra.place(x=310, y=72, relheight=0.4)

panel_resultado.config(yscrollcommand=barra.set)
barra.config(command=panel_resultado.yview)

buttonApilar = Button(raiz, text="Apilar", justify="center", command=getNum)
buttonApilar.place(x=285, y=258)
buttonApilar.config(
    state="normal",
    font=("Impact", 10),
    anchor="center",
    cursor="hand2",
    relief="raised", bd=5,
    activebackground="#4AB6EB"
)

buttonDesapilar = Button(frame1, text="Desapilar", justify="center", command=erase)
buttonDesapilar.place(x=20, y=20)
buttonDesapilar.config(
    state="normal",
    font=("Impact", 15),
    anchor="center",
    cursor="hand2",
    relief="raised", bd=5,
    activebackground="#4AB6EB"
)

buttonMostrar = Button(frame1, text="Mostrar", justify="center", command=show)
buttonMostrar.place(x=170, y=20)
buttonMostrar.config(
    state="normal",
    font=("Impact", 15),
    anchor="center",
    cursor="hand2",
    relief="raised", bd=5,
    activebackground="#4AB6EB"
)

buttonLimpiar = Button(raiz, text="Limpiar", justify="center", command=limpiar)
buttonLimpiar.place(x=10, y=100)
buttonLimpiar.config(
    state="normal",
    font=("Impact", 10),
    anchor="center",
    cursor="hand2",
    relief="raised", bd=5,
    activebackground="#4AB6EB"
)

raiz.mainloop()