# In this file create unit tests such that there is 100% coverage

class ShoppingCart:
    """
    This class manages items in a shopping cart and provides
    various operations like adding items, calculating totals,
    and applying discounts.
    """

    def __init__(self):
        """Initialize an empty shopping cart."""
        self.items = []

    def add_item(self, name, price, quantity=1):
        """
        Add an item to the cart.

        Args:
            name (str): Name of the item
            price (float): Price per unit
            quantity (int): Number of items to add

        Raises:
            ValueError: If price is negative or quantity is not positive
        """
        if price < 0:
            raise ValueError("Price cannot be negative")
        if quantity <= 0:
            raise ValueError("Quantity must be positive")

        self.items.append({"name": name, "price": price, "quantity": quantity})

    def remove_item(self, name):
        """
        Remove the first occurrence of an item by name.

        Args:
            name (str): Name of the item to remove

        Returns:
            bool: True if item was removed, False if not found
        """
        for i, item in enumerate(self.items):
            if item["name"] == name:
                self.items.pop(i)
                return True
        return False

    def get_total(self):
        """
        Calculate the total price of all items in the cart.

        Returns:
            float: Total price
        """
        total = 0
        for item in self.items:
            total += item["price"] * item["quantity"]
        return round(total, 2)

    def get_item_count(self):
        """
        Get the total number of items in the cart.

        Returns:
            int: Total quantity of all items
        """
        return sum(item["quantity"] for item in self.items)

    def is_empty(self):
        """
        Check if the cart is empty.

        Returns:
            bool: True if cart is empty, False otherwise
        """
        return len(self.items) == 0

    def apply_discount(self, percentage):
        """
        Apply a percentage discount to all items in the cart.

        Args:
            percentage (float): Discount percentage (0-100)

        Raises:
            ValueError: If percentage is not between 0 and 100
        """
        if percentage < 0 or percentage > 100:
            raise ValueError("Discount percentage must be between 0 and 100")

        discount_multiplier = 1 - (percentage / 100)
        for item in self.items:
            item["price"] = round(item["price"] * discount_multiplier, 2)

    def clear_cart(self):
        """Remove all items from the cart."""
        self.items = []

    def get_items(self):
        """
        Get a copy of all items in the cart.

        Returns:
            list: List of item dictionaries
        """
        return self.items.copy()