import json
import os
from pathlib import Path
from typing import Dict, Any, Optional
from dotenv import load_dotenv
# Load environment variables from .env file if present
load_dotenv()
# Define base paths
BASE_DIR = Path(__file__).resolve().parent.parent.parent
CONFIG_FILE = BASE_DIR / 'config.json'
def load_config_file() -> Dict[str, Any]:
"""Loads the configuration from config.json if it exists."""
if CONFIG_FILE.exists():
try:
with open(CONFIG_FILE, 'r', encoding='utf-8') as f:
return json.load(f)
except json.JSONDecodeError:
return {}
return {}
def get_api_key() -> str:
"""
Retrieves the API key with the following precedence:
1. Environment variable 'SCOPUS_API_KEY'
2. config.json 'api_key' field
"""
# 1. Check Environment Variable
api_key = os.getenv('SCOPUS_API_KEY')
if api_key:
return api_key
# 2. Check config.json
config = load_config_file()
api_key = config.get('api_key')
if not api_key:
raise ValueError(
"Scopus API Key not found. Please set the 'SCOPUS_API_KEY' environment variable "
"or add 'api_key' to config.json."
)
return api_key
def get_cache_config() -> Dict[str, int]:
"""
Retrieves cache expiration settings from env vars or config.json.
Defaults:
- Search: 1 hour (3600s)
- Abstract: 30 days (2592000s)
- Author: 7 days (604800s)
- Default: 24 hours (86400s)
"""
config = load_config_file()
return {
'search': int(os.getenv('CACHE_TTL_SEARCH', config.get('cache_ttl_search', 3600))),
'abstract': int(os.getenv('CACHE_TTL_ABSTRACT', config.get('cache_ttl_abstract', 2592000))),
'author': int(os.getenv('CACHE_TTL_AUTHOR', config.get('cache_ttl_author', 604800))),
'default': int(os.getenv('CACHE_TTL_DEFAULT', config.get('cache_ttl_default', 86400)))
}
