import sqlite3

db_name = 'mydb.db'

class BaseModel:
    def __init__(self,id):
        self.__id = id

    @classmethod
    def get_by_id(cls,id):
        conn = sqlite3.connect(db_name)
        cursor = conn.cursor()
        property_list = ['id']+[f"{k}" for k, v in cls.__dict__.items() if isinstance(v, property)]
        property_string = ','.join(property_list)
        query = f"SELECT {property_string} FROM {cls.__name__} WHERE id = ?"
        cursor.execute(query,(id,))
        result = cursor.fetchone()
        property_dict = dict()
        for index in range(len(property_list)):
            property_dict[property_list[index]] = result[index]
        conn.close()
        return cls(**property_dict)

    def save(self):
        conn = sqlite3.connect(db_name)
        cursor = conn.cursor()
        property_list = [f"{k}" for k, v in self.__class__.__dict__.items() if isinstance(v, property)]
        
        if self.__id != None:
            update_string = ','.join([f'`{p_name}`= ? ' for p_name in property_list])
            update_values = [getattr(self,p) for p in property_list] + [self.__id]
            query = f"UPDATE {self.__class__.__name__} SET {update_string} WHERE id = ?"
            print(query,update_values)
            cursor.execute(query,update_values)
            conn.commit()
        else:
            property_count = ('?,'*len(property_list))[:-1]
            property_names = ','.join(property_list)
            property_values = [getattr(self,p) for p in property_list]
            query = f"INSERT INTO {self.__class__.__name__}({property_names}) VALUES({property_count})"
            cursor.execute(query,property_values)
            conn.commit()
            self.__id = cursor.lastrowid
        conn.close()

class User(BaseModel):
    def __init__(self,name,email,age,id = None):
        super().__init__(id)
        self.__name = name
        self.__email = email
        self.__age = age

    @property
    def name(self):
        return self.__name
    @name.setter
    def name(self,value):
        self.__name = value
        
    @property
    def email(self):
        return self.__email

    @email.setter
    def email(self,value):
        if '@' in value:
            self.__email = value
        else:
            raise ValueError('Не корректный адрес почты')
    @property
    def age(self):
        return self.__age
    @age.setter
    def age(self,value):
        if 0 <= value <= 120:
            self.__age = value
        else:
            raise ValueError('Неправильно указан возраст')

class Product(BaseModel):
    def __init__(self,name,category,price,id=None):
        super().__init__(id)
        self.__name = name
        self.__category = category
        self.__price = price
    @property
    def name(self):
        return self.__name
    @property
    def category(self):
        return self.__category
    @property
    def price(self):
        return self.__price

product1 = Product('Свинина, шея','Мясные продукты',250)
product1.save()
'''
user2 = User.get_by_id(9)
user2.name = 'Andrey'
user2.save()
user1 = User('Igor','igor@example.com',44)
user1.save()
user1.age = 55
user1.save()
'''