"""
Singleton Orchestrator Manager
Provides a single shared instance of PromptOrchestrator for all ComfyUI nodes
"""

from typing import Optional
from .orchestrator import PromptOrchestrator


# Global singleton instance
_orchestrator_instance: Optional[PromptOrchestrator] = None


def get_orchestrator() -> PromptOrchestrator:
    """
    Get or create the singleton orchestrator instance.
    
    This ensures only one PromptOrchestrator is created and shared
    across all nodes, improving performance and reducing memory usage.
    
    Returns:
        PromptOrchestrator: The singleton orchestrator instance
    """
    global _orchestrator_instance
    if _orchestrator_instance is None:
        _orchestrator_instance = PromptOrchestrator()
    return _orchestrator_instance


def reset_orchestrator() -> None:
    """
    Reset the singleton instance (mainly for testing purposes).
    Forces creation of a new orchestrator on next get_orchestrator() call.
    """
    global _orchestrator_instance
    _orchestrator_instance = None