Senko-san
84 lines
3.0 KiB
Python
84 lines
3.0 KiB
Python
"""Application settings — single source of truth, sourced from environment.
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Nothing is hardcoded. All knobs come from env vars (or a local ``.env`` during
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development). Access the cached singleton via :func:`get_settings`.
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"""
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from functools import lru_cache
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from pathlib import Path
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from typing import Literal
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from pydantic import Field, SecretStr, field_validator
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from pydantic_settings import BaseSettings, SettingsConfigDict
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class Settings(BaseSettings):
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model_config = SettingsConfigDict(
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env_file=".env",
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env_file_encoding="utf-8",
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extra="ignore",
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case_sensitive=False,
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)
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# -- runtime ----------------------------------------------------------
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environment: Literal["dev", "test", "prod"] = "dev"
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log_level: str = "INFO"
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log_json: bool = Field(
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default=False,
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description="Structured JSON logs (enable in prod).",
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)
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# -- database ---------------------------------------------------------
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# Async driver required (asyncpg). Example:
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# postgresql+asyncpg://mcma:mcma@db:5432/mcma
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database_url: str = "postgresql+asyncpg://mcma:mcma@localhost:5432/mcma"
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db_echo: bool = False
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db_pool_size: int = 5
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db_max_overflow: int = 10
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# -- redis (cache + arq broker) --------------------------------------
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redis_url: str = "redis://localhost:6379/0"
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# -- auth -------------------------------------------------------------
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jwt_secret: SecretStr = SecretStr("change-me-in-prod")
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jwt_algorithm: str = "HS256"
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access_token_ttl_seconds: int = 60 * 15 # 15 min
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refresh_token_ttl_seconds: int = 60 * 60 * 24 * 30 # 30 days (offline-first)
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# -- media / storage --------------------------------------------------
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media_path: Path = Path("/data/media")
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transcode_cache_path: Path = Path("/data/transcode-cache")
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max_parallel_downloads: int = 2
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storage_backend: Literal["local", "s3"] = "local"
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upload_tmp_dir: Path | None = None
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# -- S3 storage (deferred; set storage_backend="s3" to use) ----------
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s3_endpoint_url: str | None = None
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s3_bucket: str | None = None
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s3_region: str | None = None
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s3_access_key: SecretStr | None = None
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s3_secret_key: SecretStr | None = None
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# -- external services (all optional; graceful degradation) ----------
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ml_service_url: str | None = None
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acoustid_api_key: SecretStr | None = None
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musicbrainz_user_agent: str = "mcma-backend/0.1.0 ( https://github.com/your/repo )"
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youtube_cookies_path: Path | None = None
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@field_validator("database_url")
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@classmethod
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def _require_async_driver(cls, v: str) -> str:
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if "+asyncpg" not in v:
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raise ValueError("database_url must use the asyncpg driver: postgresql+asyncpg://")
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return v
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@property
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def is_prod(self) -> bool:
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return self.environment == "prod"
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@lru_cache
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def get_settings() -> Settings:
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"""Cached settings singleton. Patch the cache in tests via ``get_settings.cache_clear()``."""
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return Settings()
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