from pydantic import (
    PostgresDsn
)
from pydantic_settings import BaseSettings, SettingsConfigDict


class Settings(BaseSettings):
    """
    Application settings loaded from environment variables.
    """
    database_uri: PostgresDsn
    environment: str
    project_name: str
    
    # JWT settings
    secret_key: str = "your-secret-key-change-this-in-production"
    algorithm: str = "HS256"
    
    # Role-based expiration times (in minutes)
    admin_token_expire_minutes: int = 60 * 24 * 7  # 7 days (default)
    write_token_expire_minutes: int = 60 * 24 * 3  # 3 days (default)
    read_only_token_expire_minutes: int = 60 * 8   # 8 hours (default)

    model_config = SettingsConfigDict(
        # One level above ./backend
        env_file='../.env',
        env_ignore_empty=True,
        extra='ignore'
    )
    api_v1_str: str = "/api/v1"

settings = Settings() # type: ignore