"""
web/deps.py
===========

Shared bot reference for FastAPI dependency injection.

``set_bot()`` is called once from ``bot.py`` before starting Uvicorn.
FastAPI route handlers use ``get_bot()``, ``get_comfy()``, etc. as
Depends() callables.
"""

from __future__ import annotations

from typing import Optional

_bot = None


def set_bot(bot) -> None:
    """Store the discord.py bot instance for DI access."""
    global _bot
    _bot = bot


def get_bot():
    """FastAPI dependency: return the bot instance."""
    return _bot


def get_comfy():
    """FastAPI dependency: return the ComfyClient."""
    if _bot is None:
        return None
    return getattr(_bot, "comfy", None)


def get_config():
    """FastAPI dependency: return the BotConfig."""
    if _bot is None:
        return None
    return getattr(_bot, "config", None)


def get_state_manager():
    """FastAPI dependency: return the WorkflowStateManager."""
    comfy = get_comfy()
    if comfy is None:
        return None
    return getattr(comfy, "state_manager", None)


def get_workflow_manager():
    """FastAPI dependency: return the WorkflowManager."""
    comfy = get_comfy()
    if comfy is None:
        return None
    return getattr(comfy, "workflow_manager", None)


def get_inspector():
    """FastAPI dependency: return the WorkflowInspector."""
    comfy = get_comfy()
    if comfy is None:
        return None
    return getattr(comfy, "inspector", None)


def get_user_registry():
    """FastAPI dependency: return the UserStateRegistry."""
    if _bot is None:
        return None
    return getattr(_bot, "user_registry", None)