"""Application configuration loaded from environment variables."""

from functools import lru_cache

from pydantic_settings import BaseSettings


class Settings(BaseSettings):
    """Chrysopedia API settings.

    Values are loaded from environment variables (or .env file via
    pydantic-settings' dotenv support).
    """

    # Database
    database_url: str = "postgresql+asyncpg://chrysopedia:changeme@localhost:5433/chrysopedia"

    # Redis
    redis_url: str = "redis://localhost:6379/0"

    # Application
    app_env: str = "development"
    app_log_level: str = "info"
    app_secret_key: str = "changeme-generate-a-real-secret"

    # CORS
    cors_origins: list[str] = ["*"]

    # File storage
    transcript_storage_path: str = "/data/transcripts"
    video_metadata_path: str = "/data/video_meta"

    model_config = {
        "env_file": ".env",
        "env_file_encoding": "utf-8",
        "case_sensitive": False,
    }


@lru_cache
def get_settings() -> Settings:
    """Return cached application settings (singleton)."""
    return Settings()