"""
Global singleton for NV-CLIP embedder to break circular dependencies.
"""
import sys
import os
from typing import Optional
# Add project root to path for imports
PROJECT_ROOT = os.path.abspath(os.path.join(os.path.dirname(__file__), '../..'))
if PROJECT_ROOT not in sys.path:
sys.path.insert(0, PROJECT_ROOT)
# Lazy import to avoid initialization issues
_embedder = None
def get_embedder():
"""
Get or initialize the global NV-CLIP embedder using configuration.
This singleton breaks the circular dependency between search services,
caching modules, and the MCP server.
"""
global _embedder
if _embedder is None:
try:
# Local imports to avoid circular issues
from src.embeddings.nvclip_embeddings import NVCLIPEmbeddings
from src.search.base import BaseSearchService
# Load config via base service
base_service = BaseSearchService()
config = base_service.config
nvclip_config = config.get('nvclip', {})
base_url = nvclip_config.get('base_url')
if base_url:
print(f"Initializing NV-CLIP Singleton with base_url: {base_url}", file=sys.stderr)
_embedder = NVCLIPEmbeddings(base_url=base_url)
else:
_embedder = NVCLIPEmbeddings()
except ImportError as e:
print(f"Warning: Could not import NVCLIPEmbeddings: {e}", file=sys.stderr)
except Exception as e:
print(f"Warning: Failed to initialize NV-CLIP Singleton: {e}", file=sys.stderr)
return _embedder
