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"""Centralized application settings loaded from environment variables. |
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Uses pydantic-settings so both backend and frontend can share defaults and |
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override them through a `.env` file or process environment variables. |
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""" |
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from functools import lru_cache |
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from typing import Optional |
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from pydantic_settings import BaseSettings, SettingsConfigDict |
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class APISettings(BaseSettings): |
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"""Configuration for the FastAPI backend.""" |
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host: str = "0.0.0.0" |
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port: int = 8000 |
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log_level: str = "INFO" |
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model_config = SettingsConfigDict( |
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env_prefix="API_", |
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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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) |
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class LLMSettings(BaseSettings): |
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"""Configuration for the language model backend.""" |
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backend: str = "ollama" |
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host: str = "http://localhost:11434" |
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model: str = "llama3.2:latest" |
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timeout: int = 120 |
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max_retries: int = 3 |
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retry_delay: float = 1.0 |
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api_key: Optional[str] = None |
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site_url: Optional[str] = None |
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app_name: Optional[str] = None |
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model_config = SettingsConfigDict( |
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env_prefix="LLM_", |
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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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) |
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class FrontendSettings(BaseSettings): |
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"""Configuration for the Gradio frontend.""" |
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backend_base_url: str = "http://localhost:8000" |
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websocket_url: str = "ws://localhost:8000/ws/conversation" |
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model_config = SettingsConfigDict( |
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env_prefix="FRONTEND_", |
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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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) |
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class DBSettings(BaseSettings): |
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"""Configuration for persistent storage.""" |
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path: str = ".localdata/converta.db" |
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model_config = SettingsConfigDict( |
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env_prefix="DB_", |
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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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) |
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class AppSettings(BaseSettings): |
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"""Aggregate configuration exposed to the application.""" |
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api: APISettings = APISettings() |
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llm: LLMSettings = LLMSettings() |
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frontend: FrontendSettings = FrontendSettings() |
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db: DBSettings = DBSettings() |
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log_level: str = "INFO" |
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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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) |
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@lru_cache |
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def get_settings() -> AppSettings: |
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"""Return the singleton settings instance.""" |
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return AppSettings() |
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