import yaml


class OrderItem:
    def __init__(self, name, code=None):
        self.name = name
        self.code = code
        self.number = 0

    def set_quantity(self, number):
        self.number = number

    def add_item(self):
        self.number += 1

    def __eq__(self, other):
        return self.name == other.name

    def __repr__(self):
        return f'<OrderItem {self.name} x{self.number}>'

    def __add__(self, other):
        self.number += other


class Order:
    items = list()
    menu = dict()

    @staticmethod
    def load_menu():
        with open("../data/menu.yml", "r") as stream:
            Order.menu = yaml.safe_load(stream)['items']

    @staticmethod
    def list_options():
        return [option['name']for option in Order.menu]

    @staticmethod
    def add_item(item_name):
        item = OrderItem(item_name)
        if item in Order.items:
            previous_item = Order.items[Order.items.index(item)]
            previous_item += 1
        else:
            Order.items.append(item)
            item += 1

    @staticmethod
    def get_string():
        menu_as_dict = {x['name']: x for x in Order.menu}

        price = 0
        output = []
        for item in Order.items:
            item_str = (
                f"""**{item.number}x - {menu_as_dict[item.name]['name']}**\n"""
                f"""{menu_as_dict[item.name]['description']}"""
            )
            price += item.number * menu_as_dict[item.name]['price_wpp']
            output.append(item_str)
        output = '\n'.join(output)
        output += f'\n**Total Price**: R${price}'

        return output

    @staticmethod
    def remove_latest_item():
        Order.items = Order.items[:-1]

    @staticmethod
    def clear_all_items():
        Order.items = list()