import tkinter as tk

from my_package.App_window import AppWindow

label_names = ["a:","b:","m:","seed:"]
entries = []
labels = []

class LehmerAlg (AppWindow):
    def __init__(self):
        super().__init__(300,500)
        self.button = tk.Button(self.root, text="calculate", command=self.on_click)
        self.c_button = tk.Button(self.root, text="close", command=self.close)
        self.list = tk.Listbox(self.root)

    def init_widgets(self):
        r = 0
        for _ in range(4):
            entry = tk.Entry(self.root, width=20)
            entry.grid(row=r, column=1)
            entries.append(entry)
            label = tk.Label(self.root, text=f"{label_names[r]}")
            label.grid(row=r, column=0)
            labels.append(label)
            r +=1
        self.button.grid(column=2, row=0)
        self.c_button.grid(column=2, row=1)
        self.list.grid(column=1, row=5)

    def on_click(self):
        val = 0
        for _ in range(4):
           label_names[val] = entries[val].get()
           entries[val].delete(0, tk.END)
           val +=1

        result = (int(label_names[0])*int(label_names[3])+int(label_names[1])) %int(label_names[2])
        #v_k = (a * v_k + b) % m
        self.list.insert(tk.END, result)

    def close(self):
        self.root.destroy()

def main ():
    app = LehmerAlg()
    app.run()

main()