from pydantic_settings import BaseSettings, SettingsConfigDict
from pydantic import PositiveInt, computed_field, MySQLDsn
from pydantic_core import Url


class Configs(BaseSettings):
    HOST: str
    PORT: PositiveInt
    DATABASE: str
    USERNAME: str
    PASSWORD: str

    @computed_field
    def DB_URI(self) -> MySQLDsn:
        return Url(
            f"mysql+aiomysql://{self.USERNAME}:{self.PASSWORD}@{self.HOST}:{self.PORT}/{self.DATABASE}?charset=utf8mb4"
            )
    
    model_config = SettingsConfigDict(env_file='.env', env_file_encoding='utf-8')

configs = Configs()