from pydantic_settings import BaseSettings, SettingsConfigDict
from typing import List


class Settings(BaseSettings):
    """Application settings loaded from environment variables."""

    # Database
    DATABASE_URL: str

    # Security
    SECRET_KEY: str
    ALGORITHM: str = "HS256"
    ACCESS_TOKEN_EXPIRE_MINUTES: int = 30
    REFRESH_TOKEN_EXPIRE_DAYS: int = 7

    # Registration
    ALLOW_REGISTRATION: bool = False

    # CORS
    ALLOWED_ORIGINS: str = "http://localhost:8000"

    # Environment
    ENVIRONMENT: str = "development"

    model_config = SettingsConfigDict(
        env_file=".env",
        env_file_encoding="utf-8",
        case_sensitive=True
    )

    @property
    def cors_origins(self) -> List[str]:
        """Parse comma-separated CORS origins into a list."""
        return [origin.strip() for origin in self.ALLOWED_ORIGINS.split(",")]


# Global settings instance
settings = Settings()