settings.py

import os
import string
from functools import lru_cache
from typing import List

from auth_lib.fastapi import UnionAuthSettings
from pydantic import ConfigDict, DirectoryPath, PostgresDsn, RedisDsn
from pydantic_settings import BaseSettings


class Settings(UnionAuthSettings, BaseSettings):
    """Application settings"""

    DB_DSN: PostgresDsn = 'postgresql://postgres@localhost:5432/postgres'
    REDIS_DSN: RedisDsn = 'redis://localhost:6379/0'
    ROOT_PATH: str = '/' + os.getenv('APP_NAME', '')

    CONTENT_TYPES: List[str] = ['application/pdf']
    MAX_SIZE: int = 26214400  # Максимальный размер файла в байтах
    MAX_PAGE_COUNT: int = 50
    STORAGE_TIME: int = 7 * 24  # Время хранения файла в часах
    STATIC_FOLDER: DirectoryPath | None = None

    ALLOW_STUDENT_NUMBER: bool = False

    PIN_SYMBOLS: str = string.ascii_uppercase + string.digits
    PIN_LENGTH: int = 6

    CORS_ALLOW_ORIGINS: list[str] = ['*']
    CORS_ALLOW_CREDENTIALS: bool = True
    CORS_ALLOW_METHODS: list[str] = ['*']
    CORS_ALLOW_HEADERS: list[str] = ['*']

    QR_TOKEN_PREFIX: str = ""
    QR_TOKEN_SYMBOLS: str = string.ascii_uppercase + string.digits
    QR_TOKEN_LENGTH: int = 6
    QR_TOKEN_TTL: int = 30  # Show time of QR code in seconds
    QR_TOKEN_DELAY: int = 5  # How long QR code valid after hide in seconds

    model_config = ConfigDict(env_file=".env", extra="allow")


@lru_cache()
def get_settings() -> Settings:
    return Settings()