"""Model manager — delegates to gpu_generate."""

import logging
from typing import Optional
import config

logger = logging.getLogger(__name__)


class ModelManager:
    _instance: Optional["ModelManager"] = None

    def __new__(cls):
        if cls._instance is None:
            cls._instance = super().__new__(cls)
            cls._instance._initialized = False
        return cls._instance

    def __init__(self):
        if self._initialized:
            return
        self._initialized = True

    @property
    def generate_fn(self) -> callable:
        """Get the generate function — prefers GPU version from app.py."""
        import core.gpu_generate as gpg
        # app.py registers the @spaces.GPU version on the module
        return getattr(gpg, 'gpu_generate', gpg.gpu_generate)

    def parse_image(self, image_path: str, prompt: str = None) -> str:
        return "[Vision not available]"