import time
import pickle
import tkinter as tk
import easygui

class dependencyrequirement():
    def __init__(self, name: str,amount: list):
        self.name = name
        self.amount = amount
class product():
    def __init__(self, name: str,price: float,dependencies: list):
        self.name = name
        self.price = price
        self.dependencies = dependencies
class database():
    def __init__(self):
        self.dependencies = []
        self.products = {}
        self.stock = {}
        pass
    def adddep(self, name: str):
        self.dependencies.append(name)
        self.stock[name] = 0.0
    def addproduct(self, name: str, price: float, dependencies: list):
        self.products[name] = product(name,price,dependencies)
    def processproduct(self, name: str):
        product = self.products[name]
        # add changes to stock
        for i in product.dependencies:
            self.stock[i.name] -= i.amount

maindata = database()

def clear():
    for i in range(100):
        print()
def products_new(root):
    childwin = tk.Toplevel(root)
    childwin.title("New product")

    namevar = tk.StringVar(value="Name")
    nameinp = tk.Entry(childwin, textvariable=namevar)
    nameinp.grid(row=0,column=0)

    pricevar = tk.StringVar(value="Price")
    priceinp = tk.Entry(childwin, textvariable=pricevar)
    priceinp.grid(row=1,column=0)

    dependencies = tk.Listbox(childwin, selectmode=tk.SINGLE, height=len(maindata.dependencies), width=50)
    dependencies.grid(row=2,column=0)

    def close():
        childwin.destroy() # destroy so incase of an fail we still are finished.
        maindata.addproduct(namevar.get(), float(pricevar.get()), [])

    addbut = tk.Button(childwin, text="Create", command=close)
    addbut.grid(row=10,column=0)

    childwin.mainloop()

if __name__ == "__main__":
    easygui.msgbox("Welcome to CashierSystem PC edition!", "Welcome")
    root = tk.Tk() # root

    menubar = tk.Menu(root) # menubar
    root.config(menu=menubar)

    promenu = tk.Menu(menubar) # product menu
    promenu.add_command(
        label='new',
        command=lambda: products_new(root),
    )
    menubar.add_cascade(
        label="Products",
        menu=promenu,
        underline=0,
    )


    root.mainloop()