"""
Question intent tracker for semantic question deduplication.
"""

from typing import Optional, List, Dict, Any

from app.services.contextual_normalizer import detect_previous_question_intent


def get_last_ai_intent(conversation_history: List[Dict[str, Any]]) -> Optional[str]:
    """
    Returns the intent code of the last AI message in conversation history.
    """
    if not conversation_history:
        return None

    last_ai_msg = None
    for turn in reversed(conversation_history):
        if turn.get("role") in ["assistant", "ai"]:
            last_ai_msg = turn.get("message") or turn.get("content")
            break

    if last_ai_msg:
        return detect_previous_question_intent(last_ai_msg)

    return None