"""SQLite database with RAG support for chat history and embeddings.

Facade for the ``vibe_bot.db`` package; re-exports the public names so
imports of ``vibe_bot.database`` keep working unchanged.
"""

from __future__ import annotations

from vibe_bot.db.bots import CustomBotManager
from vibe_bot.db.messages import ChatDatabase
from vibe_bot.db.timing import IMAGE_GEN_TIME_LIMIT, IMAGE_GEN_TIME_WINDOW

__all__ = [
    "IMAGE_GEN_TIME_LIMIT",
    "IMAGE_GEN_TIME_WINDOW",
    "ChatDatabase",
    "CustomBotManager",
    "get_database",
]

# Global database instance
_chat_db: ChatDatabase | None = None


def get_database() -> ChatDatabase:
    """Get or create the global database instance."""
    global _chat_db
    if _chat_db is None:
        _chat_db = ChatDatabase()
    return _chat_db