Food_Delivery_System.py

class Restaurant:
    # List to keep track of all restaurants
    restaurants = []
    
    def __init__(self, name, menu):
        """
        Initializes the Restaurant with a name and a menu.
        The menu is a dictionary with item names as keys and prices as values.
        """
        self.name = name
        self.menu = menu
        Restaurant.restaurants.append(self)  

    @classmethod
    def show_restaurants(cls):
        """Displays all available restaurants."""
        if not cls.restaurants:
            print("No restaurants available yet.")
            return None
        print("\nAvailable Restaurants:")
        for idx, restaurant in enumerate(cls.restaurants, start=1):
            print(f"{idx}. {restaurant.name}")
        return cls.restaurants

    def show_menu(self):
        """Displays the menu of the restaurant."""
        print(f"\nMenu for {self.name}:")
        for idx, (item, price) in enumerate(self.menu.items(), start=1):
            print(f"{idx}. {item} - ${price}")


class Order:
    order_count = 0
    
    def __init__(self, restaurant, items):
        """
        Initializes an order with a restaurant and a list of ordered items.
        """
        Order.order_count += 1
        self.order_id = Order.order_count
        self.restaurant = restaurant
        self.items = items
        self.status = "Preparing"  # Initial status
        
    def track_order(self):
        """Displays the status of the order."""
        print(f"Order #{self.order_id} from {self.restaurant.name}: Status - {self.status}")
        
    # def update_status(self, status):
    #     """Updates the status of the order."""
    #     self.status = status
    #     print(f"Order #{self.order_id} status updated to {self.status}")


class Customer:
    def __init__(self, name):
        self.name = name
        self.cart = {}
        self.orders = []

    def browse_restaurants(self):
        """Lets the customer browse through available restaurants."""
        restaurants = Restaurant.show_restaurants()
        if restaurants:
            res_choice = int(input("\nSelect a restaurant (number): ")) - 1
            if 0 <= res_choice < len(restaurants):
                restaurant = restaurants[res_choice]
                restaurant.show_menu()
                self.add_to_cart(restaurant)
            else:
                print("Invalid restaurant selection!")

    def add_to_cart(self, restaurant):
        """Adds items to the cart."""
        while True:
            item = input("\nEnter item to add (or type 'done' to finish): ").strip()
            if item.lower() == 'done':
                break
            if item in restaurant.menu:
                quantity = int(input(f"Enter quantity for {item}: "))
                if restaurant not in self.cart:
                    self.cart[restaurant] = {}
                self.cart[restaurant][item] = self.cart[restaurant].get(item, 0) + quantity
            else:
                print("Item not available in this restaurant's menu.")

    def view_cart(self):
        """Displays items in the cart."""
        if not self.cart:
            print("\nCart is empty.")
            return
        print("\nYour Cart:")
        for restaurant, items in self.cart.items():
            print(f"\nRestaurant: {restaurant.name}")
            for item, qty in items.items():
                print(f"{item} - Quantity: {qty}")
                
    def place_order(self):
        """Places the order."""
        if not self.cart:
            print("\nCart is empty. Please add items first!")
            return
        for restaurant, items in self.cart.items():
            order = Order(restaurant, items)
            self.orders.append(order)
        print("\nOrder placed successfully!")
        self.cart.clear()  # Clear the cart after placing the order

    def track_orders(self):
        """Tracks and displays all orders."""
        if not self.orders:
            print("\nNo orders placed yet.")
            return
        print("\nYour Orders:")
        for order in self.orders:
            order.track_order()

class FoodDeliverySystem:
    def __init__(self):
        self.customers = []

    def start(self):
        """Starts the food delivery system."""
        print("Welcome to the Food Delivery System!")
        
        # Create some sample restaurants and their menus
        Restaurant("Dominos", {"Onion": 8.99, "Golden Corn": 9.99, "FarmHouse": 10.99})
        Restaurant("McDonalds", {"Cheese Burger": 6.99, "Veggie Burger": 5.99, "Double Cheese Burger": 7.99})
        
        customer_name = input("Enter your name: ")
        customer = Customer(customer_name)
        self.customers.append(customer)
        
        while True:
            print("\n1. Browse Restaurants\n2. View Cart\n3. Place Order\n4. Track Orders\n5. Exit")
            choice = input("Choose an option: ")
            if choice == "1":
                customer.browse_restaurants()
            elif choice == "2":
                customer.view_cart()
            elif choice == "3":
                customer.place_order()
            elif choice == "4":
                customer.track_orders()
            elif choice == "5":
                print("Thank you for using the Food Delivery System! Goodbye!")
                break
            else:
                print("Invalid choice! Please try again.")

# Start the system
if __name__ == "__main__":
    app = FoodDeliverySystem()
    app.start()