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"""Application configuration settings.
This module handles all configuration settings loaded from environment variables.
Settings are validated using Pydantic and cached for performance.
"""
from functools import lru_cache
from pydantic import Field
from pydantic_settings import BaseSettings, SettingsConfigDict
class Settings(BaseSettings):
"""Application settings loaded from environment variables."""
model_config = SettingsConfigDict(
env_file=".env",
env_file_encoding="utf-8",
extra="ignore",
case_sensitive=False,
)
# MongoDB Configuration
mongo_uri: str = Field(
...,
alias="MONGO_URI",
description="MongoDB connection URI",
)
mongo_db: str = Field(
"expense",
alias="MONGO_DB",
description="MongoDB database name",
)
mongo_collection: str = Field(
"headcategories",
alias="MONGO_COLLECTION",
description="MongoDB collection name for headcategories",
)
mongo_subcategory_collection: str = Field(
"categories",
alias="MONGO_SUBCATEGORY_COLLECTION",
description="MongoDB collection name for categories",
)
api_logs_collection: str = Field(
"api_logs",
alias="MONGO_API_LOGS_COLLECTION",
description="MongoDB collection name for API logs",
)
# OpenAI Configuration
openai_api_key: str = Field(
...,
alias="OPENAI_API_KEY",
description="OpenAI API key for LLM requests",
)
openai_model: str = Field(
"gpt-4o-mini",
alias="OPENAI_MODEL",
description="OpenAI model to use for categorization",
)
# Performance & Caching Configuration
category_cache_ttl_seconds: int = Field(
300,
alias="CATEGORY_CACHE_TTL",
description="Time-to-live for category cache in seconds (5 minutes default)",
ge=60, # Minimum 1 minute
)
db_query_timeout_seconds: float = Field(
5.0,
alias="DB_QUERY_TIMEOUT",
description="Timeout for database queries in seconds",
ge=1.0,
le=30.0,
)
openai_api_timeout_seconds: float = Field(
15.0,
alias="OPENAI_API_TIMEOUT",
description="Timeout for OpenAI API calls in seconds",
ge=5.0,
le=60.0,
)
@lru_cache
def get_settings() -> Settings:
"""Get cached settings instance.
Returns:
Settings: Application settings instance
"""
return Settings()
# Global settings instance
settings = get_settings()
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