import logging
from fastapi import APIRouter, Depends, HTTPException

from ..models import ExternalConvRequestDTO, DetectIntentResponseDTO
from ..services import ConversationManagerService
from ..dependencies import get_conversation_manager


logger = logging.getLogger(__name__)

router = APIRouter(prefix="/api/v1/dialogflow", tags=["conversation"])


@router.post("/detect-intent", response_model=DetectIntentResponseDTO)
async def detect_intent(
    request: ExternalConvRequestDTO,
    conversation_manager: ConversationManagerService = Depends(
        get_conversation_manager
    ),
) -> DetectIntentResponseDTO:
    """
    Detect user intent and manage conversation.

    Args:
        request: External conversation request from client

    Returns:
        Dialogflow detect intent response
    """
    try:
        logger.info("Received detect-intent request")
        response = await conversation_manager.manage_conversation(request)
        logger.info("Successfully processed detect-intent request")
        return response

    except ValueError as e:
        logger.error(f"Validation error: {str(e)}", exc_info=True)
        raise HTTPException(status_code=400, detail=str(e))

    except Exception as e:
        logger.error(f"Error processing detect-intent: {str(e)}", exc_info=True)
        raise HTTPException(status_code=500, detail="Internal server error")