main.py

import tkinter as tk
import json
import datetime
import bcrypt
import os

# ToDo: Ausloggen, Passwort encrpyten

user_file = "users.json"

def loadUsers():
    if os.path.exists(user_file):
        with open(user_file, "r") as f:
            return json.load(f)
    else:
        return []

class BankApp:
    def __init__(self, root):
        self.root = root
        self.users = loadUsers()

        self.eingabefeld_color = "#d4a831"

        self.currentUser = None
        self.balance = 0
        self.cash = 0

        self.name_wert = tk.StringVar()
        self.password_wert = tk.StringVar()
        self.action_wert = tk.IntVar()
        
        self.root.title("My First App")
        self.root.geometry("800x700")
        self.root.config(bg="#e8c461")
        self.root.attributes('-topmost', True)

        self.create_widgets()

    def create_widgets(self):
        self.header = tk.Label(self.root, text = "BANK", font=("Arial", 32, "bold"), fg="white", bg=self.root.cget('bg'), relief="solid", bd=3, pady=20, padx=100)
        self.header.pack(pady=(50, 20))
        self.underheader = tk.Label(self.root, text="", font=("Arial", 14), bg=self.root.cget('bg'))

        self.login_frame = tk.Frame(self.root, bg=self.root.cget("bg"), relief="solid", bd=1, pady= 50, padx=100) # Erstellt einen Neuen Frame

        self.name_input = tk.Entry(self.login_frame, font=("Arial", 14), fg="white", bg=self.eingabefeld_color, relief="solid", bd=2, textvariable=self.name_wert) # Erstellt das eingabefeld im neuen Frame
        self.user_hint = tk.Label(self.login_frame, text="Benutzername: ", font=("Arial", 14), bg=self.root.cget('bg')) # Erstellt denn text vor dem Eingabefeld
        self.user_hint.grid(row=0, column=0, sticky="e", pady=5)
        self.name_input.grid(row=0, column=1, pady=5)

        self.password_input = tk.Entry(self.login_frame, font=("Arial", 14), fg="white", bg=self.eingabefeld_color, relief="solid", bd=2, show="*", textvariable=self.password_wert)
        self.password_hint = tk.Label(self.login_frame, text="Passwort: ", font=("Arial", 14), bg=self.root.cget("bg"))
        self.password_hint.grid(row=1, column=0, sticky="e", pady=10)
        self.password_input.grid(row=1, column=1, pady=10)

        self.lf_info_label = tk.Label(self.login_frame, text = "Benutzername oder Passwort ist falsch!", font=("Arial", 12, "bold"), fg="red", bg=self.root.cget('bg'), pady= 5)
        self.lf_button = tk.Button(self.login_frame, text="Login", command=self.login_logic, font=("Arial", 16), fg="white", bg=self.root.cget("bg"), relief="raised", bd=3, padx= 75, pady=5)
        self.lf_button.grid(row=2, column=0, columnspan=2, pady=20)

        self.login_button = tk.Button(self.root, text="Login", command=self.show_login, font=("Arial", 20), fg="white", bg=self.root.cget("bg"), relief="raised", bd=3)
        self.login_button.pack(pady=50, ipady=20, ipadx=140)

        self.dashboard_frame = tk.Frame(self.root, bg=self.root.cget("bg"), relief="solid", bd=1, pady=50, padx=100)

        self.balance_label = tk.Label(self.dashboard_frame, text=f"Kontostand: {self.balance}", font=("Arial", 14), fg="black", bg=self.root.cget("bg"), padx=25, pady=5)
        self.balance_label.grid(row=1, column=0)
        self.cash_label = tk.Label(self.dashboard_frame, text=f"Bargeld: {self.cash}", font=("Arial", 14), fg="black", bg=self.root.cget("bg"), padx=25, pady=5)
        self.cash_label.grid(row=1, column=1)

        self.withdraw_button = tk.Button(self.dashboard_frame, text="Auszahlen", command=lambda: self.show_action_frame("auszahlen"), font=("Arial", 16), fg="white", bg=self.root.cget("bg"), relief="raised", bd=3, padx= 75, pady=5)
        self.withdraw_button.grid(row=2, column=0)
        self.deposit_button = tk.Button(self.dashboard_frame, text="Einzahlen", command=lambda: self.show_action_frame("einzahlen"), font=("Arial", 16), fg="white", bg=self.root.cget("bg"), relief="raised", bd=3, padx= 75, pady=5)
        self.deposit_button.grid(row=2, column=1)

        self.register_button = tk.Button(self.root, text="Registrieren", command=self.show_register, font=("Arial", 20), fg="white", bg=self.root.cget("bg"), relief="raised", bd=3)
        self.register_button.pack(pady=50, ipady=20, ipadx=120)

        self.register_frame = tk.Frame(self.root, bg=self.root.cget("bg"), relief="solid", bd=1, pady= 50, padx=100) # Erstellt einen Neuen Frame

        self.name_input = tk.Entry(self.register_frame, font=("Arial", 14), fg="white", bg=self.eingabefeld_color, relief="solid", bd=2, textvariable=self.name_wert) # Erstellt das eingabefeld im neuen Frame
        self.user_hint = tk.Label(self.register_frame, text="Benutzername: ", font=("Arial", 14), bg=self.root.cget('bg')) # Erstellt denn text vor dem Eingabefeld
        self.user_hint.grid(row=0, column=0, sticky="e", pady=5)
        self.name_input.grid(row=0, column=1, pady=5)

        self.password_input = tk.Entry(self.register_frame, font=("Arial", 14), fg="white", bg=self.eingabefeld_color, relief="solid", bd=2, show="*", textvariable=self.password_wert)
        self.password_hint = tk.Label(self.register_frame, text="Passwort: ", font=("Arial", 14), bg=self.root.cget("bg"))
        self.password_hint.grid(row=1, column=0, sticky="e", pady=10)
        self.password_input.grid(row=1, column=1, pady=10)

        self.rf_info_label = tk.Label(self.register_frame, text = " ", font=("Arial", 12, "bold"), fg="red", bg=self.root.cget('bg'), pady= 5)
        self.rf_button = tk.Button(self.register_frame, text="Registrieren", command=self.register_logic, font=("Arial", 16), fg="white", bg=self.root.cget("bg"), relief="raised", bd=3, padx= 75, pady=5)
        self.rf_button.grid(row=2, column=0, columnspan=2, pady=20)

        self.action_frame = tk.Frame(self.root, bg=self.root.cget("bg"), relief="solid", bd=1, pady=50, padx=100)

        self.af_input = tk.Entry(self.action_frame, font=("Arial", 14), fg="white", bg=self.eingabefeld_color, relief="solid", bd=2, textvariable=self.action_wert)
        self.af_button = tk.Button(self.action_frame, text="Bestätigen", command=self.handleAction, font=("Arial", 16), fg="white", bg=self.root.cget("bg"), relief="raised", bd=3, padx= 75, pady=5)
        self.af_cancel_button = tk.Button(self.action_frame, text="Abbrechen", command=self.cancelAction, font=("Arial", 16), fg="white", bg=self.root.cget("bg"), relief="raised", bd=3, padx= 75, pady=5)

        self.af_input.grid(row=1, column=0, columnspan=2, pady=20)
        self.af_button.grid(row=2, column=0, pady= 10)
        self.af_cancel_button.grid(row=2, column=1, pady=10)

    def set_header_text(self, new_text):
        self.header.config(text=new_text)

    def set_underheader_text(self, new_text):
        self.underheader.config(text=new_text)

    def reset_header(self):
        self.header.config(text = "BANK", font=("Arial", 32, "bold"), fg="white", bg=self.root.cget('bg'), relief="solid", bd=3, pady= 20, padx=100)
        self.header.pack(pady=(50, 20))

    def show_login(self):
        self.set_header_text("Bitte Einloggen: ")
        self.login_button.pack_forget()
        self.register_button.pack_forget()
        self.login_frame.pack()

    def login_logic(self):
        eingegebener_name = self.name_wert.get()
        eingegebenes_passwort = self.password_wert.get()

        user_found = None
        for user in self.users:
            if user["name"] == eingegebener_name:
                user_found = user
                break

        if user_found:
            if self.verify_password(eingegebenes_passwort, user_found["password"]):
                self.currentUser = user_found
                print("Erfolgreich eingeloggt!")
                self.show_dashboard()
            else:
                print("[ERROR] Benutzername oder Passwort ist falsch!")
                self.lf_info_label.grid(row=3, column=0, columnspan=2, pady=20)
                self.password_wert.set("")
        else:
            print("[ERROR] Benutzername oder Passwort ist falsch!")
            self.lf_info_label.grid(row=3, column=0, columnspan=2, pady=20)
            self.password_wert.set("")

    def show_register(self):
        self.set_header_text("Registrieren:")
        self.login_button.pack_forget()
        self.register_button.pack_forget()
        self.register_frame.pack()
        
    def register_logic(self):
        if any(user["name"] == self.name_wert.get() for user in self.users):
            print("[ERROR] Dieser Name ist bereits vergeben!")
            self.rf_info_label.config(text="Dieser Name ist bereits vergeben!", fg="red")
            self.rf_info_label.grid(row=3, column=0, columnspan=2, pady=20)
            return
        
        if " " in self.password_wert.get():
            print("[ERROR] Du darfst keine Leerzeichen benutzen!")
            self.rf_info_label.config(text="Das Passwort das kein Leerzeichen beinhalten", fg="red")
            self.rf_info_label.grid(row=3, column=0, columnspan=2, pady=20)
            return

        newUser = {
            "name": self.name_wert.get(),
            "password":self.hash_password(self.password_wert.get()),
            "firstLogin": datetime.datetime.now().isoformat(),
            "balance": 1000,
            "cash": 0
        }

        self.users.append(newUser)
        self.currentUser = newUser
        with open(user_file, "w") as f:
            json.dump(self.users, f, indent=4, ensure_ascii=False)

        print("Du hast dich erfolgreich Registriert!")
        self.show_dashboard()

    def show_dashboard(self):
        self.login_frame.pack_forget()
        self.register_frame.pack_forget()
        self.reset_header()
        self.set_underheader_text(f"Willkommen {self.currentUser["name"]}!")
        self.underheader.pack()

        self.balance = self.currentUser["balance"]
        self.cash = self.currentUser["cash"]

        self.balance_label.config(text=f"Kontostand: {self.balance}")
        self.cash_label.config(text=f"Bargeld: {self.cash}")

        self.dashboard_frame.pack()

    def update_user(self, updates):
        self.users = loadUsers()

        for user in self.users:
            if user["name"] == self.currentUser["name"]:
                user.update(updates)
                break
        
        with open(user_file, "w") as f:
            json.dump(self.users, f, indent=4, ensure_ascii=False)

    def hash_password(self, password):
        # Verschlüsselt ein Passwort
        return bcrypt.hashpw(password.encode('utf-8'), bcrypt.gensalt()).decode('utf-8')

    def verify_password(self, password, hashed):
        # Vergleicht ein Passwort mit dem verschlüsselten
        return bcrypt.checkpw(password.encode('utf-8'), hashed.encode('utf-8'))

    def show_action_frame(self, action):
        if action == "einzahlen":
            self.set_header_text("Einzahlen: ")
            self.set_underheader_text("Wieviel willst du einzahlen?")
        elif action == "auszahlen":
            self.set_header_text("Auszahlen: ")
            self.set_underheader_text("Wieviel willst du auszahlen?")
        else:
            return
        self.dashboard_frame.pack_forget()
        self.action_frame.pack()

    def handleAction(self):
        action = self.header.cget("text").replace(": ", "")
        wert = self.action_wert.get()
        if action == "Auszahlen":
            if self.balance < wert:
                print("[ERROR] Ihr kontostand ist nicht ausreichend für diese Transaktion!")
            else:
                self.cash += wert
                self.balance -= wert
                print("Diese Transaktion war erfolgreich!")
        elif action == "Einzahlen":
            if self.cash < wert:
                print("[ERROR] Ihr kontostand ist nicht ausreichend für diese Transaktion!")
            else:
                self.cash -= wert
                self.balance += wert
                print("Diese Transaktion war erfolgreich!")
        self.update_user({"balance": self.balance, "cash": self.cash})
        self.dashboard_frame.pack()
        self.action_frame.pack_forget()

    def cancelAction(self):
        self.action_frame.pack_forget()
        self.show_dashboard()

root = tk.Tk()
app = BankApp(root)
root.mainloop()