import secrets
from typing import Any, Dict, List, Optional, Union
from pydantic import AnyHttpUrl, EmailStr, HttpUrl, validator
from pydantic_settings import BaseSettings


class Settings(BaseSettings):
    PROJECT_NAME: str = "User Authentication Flow Service"
    DESCRIPTION: str = "A service for user authentication flow"
    VERSION: str = "0.1.0"
    API_V1_STR: str = "/api/v1"
    
    # Secret key for JWT
    SECRET_KEY: str = secrets.token_urlsafe(32)
    # 60 minutes * 24 hours * 8 days = 8 days
    ACCESS_TOKEN_EXPIRE_MINUTES: int = 60 * 24 * 8
    
    # CORS settings
    BACKEND_CORS_ORIGINS: List[AnyHttpUrl] = []

    @validator("BACKEND_CORS_ORIGINS", pre=True)
    def assemble_cors_origins(cls, v: Union[str, List[str]]) -> Union[List[str], str]:
        if isinstance(v, str) and not v.startswith("["):
            return [i.strip() for i in v.split(",")]
        elif isinstance(v, (list, str)):
            return v
        raise ValueError(v)
    
    # Debug mode
    DEBUG: bool = True

    # Database settings
    DB_PATH: str = "/projects/userauthenticationflowservice-fvu111/storage/db/db.sqlite"
    SQLALCHEMY_DATABASE_URL: str = f"sqlite:///{DB_PATH}"
    
    # First superuser
    FIRST_SUPERUSER: EmailStr = "admin@example.com"
    FIRST_SUPERUSER_PASSWORD: str = "admin"

    class Config:
        case_sensitive = True


settings = Settings()