mirror of
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100 lines
2.7 KiB
Python
100 lines
2.7 KiB
Python
import os
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import secrets
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from functools import lru_cache
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from pathlib import Path
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from pydantic import AnyHttpUrl, PostgresDsn, field_validator, model_validator
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from pydantic_settings import BaseSettings, SettingsConfigDict
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ROOT = Path(__file__).resolve().parent.parent.parent
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ENV_FILE = ROOT / ".env"
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class Settings(BaseSettings):
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# Project
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PROJECT_NAME: str = "Chat Hub"
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VERSION: str = "0.1.0"
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API_V1_STR: str = "/api/v1"
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SECRET_KEY: str = secrets.token_urlsafe(32)
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ACCESS_TOKEN_EXPIRE_MINUTES: int = 60 * 24 * 8 # 8 days
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# Security
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ALGORITHM: str = "HS256"
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# Backend Server
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BACKEND_CORS_ORIGINS: list[str | AnyHttpUrl] = []
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@field_validator("BACKEND_CORS_ORIGINS", mode="before")
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def assemble_cors_origins(self, v: str | list[str]) -> list[str] | str:
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if isinstance(v, str) and not v.startswith("["):
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return [i.strip() for i in v.split(",")]
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if isinstance(v, (list, str)):
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return v
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raise ValueError(v)
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# Database
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POSTGRES_SERVER: str = "localhost"
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POSTGRES_USER: str = "postgres"
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POSTGRES_PASSWORD: str = ""
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POSTGRES_DB: str = "chat_hub"
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POSTGRES_PORT: str = "5432"
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DATABASE_URI: PostgresDsn | None = None
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@model_validator(mode="after")
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def assemble_db_connection(self) -> "Settings":
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if self.DATABASE_URI is None:
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self.DATABASE_URI = PostgresDsn.build(
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scheme="postgresql+asyncpg",
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username=self.POSTGRES_USER,
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password=self.POSTGRES_PASSWORD,
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host=self.POSTGRES_SERVER,
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port=int(self.POSTGRES_PORT),
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path=f"/{self.POSTGRES_DB or ''}",
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)
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return self
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# LLM Configuration
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OPENAI_API_KEY: str | None = None
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ANTHROPIC_API_KEY: str | None = None
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# Vector Store
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VECTOR_STORE_TYPE: str = "pgvector" # or "chroma", "faiss", etc.
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EMBEDDING_MODEL: str = "sentence-transformers/all-mpnet-base-v2"
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# Logging
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LOG_LEVEL: str = "INFO"
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# Environment
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ENVIRONMENT: str = "development"
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DEBUG: bool = False
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TESTING: bool = False
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# Rate Limiting
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RATE_LIMIT: str = "100/minute"
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# Caching
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CACHE_TTL: int = 300 # 5 minutes
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model_config = SettingsConfigDict(
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env_file=ENV_FILE,
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env_file_encoding="utf-8",
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case_sensitive=True,
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extra="ignore",
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)
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@lru_cache
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def get_settings() -> Settings:
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"""
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Get cached settings instance.
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This function uses lru_cache to prevent re-reading the environment on each call.
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"""
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return Settings()
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# Create settings instance
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settings = get_settings()
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# Set environment variables for third-party libraries
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os.environ["TOKENIZERS_PARALLELISM"] = "false"
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