from typing import Optional, Dict, Any
from uuid import UUID
from sqlalchemy.orm import Session
from models.grocery_item import GroceryItem
from fastapi import HTTPException

def get_grocery_item_id_by_name(db: Session, name: str) -> Optional[UUID]:
    """
    Retrieves the ID of a grocery item based on its name.

    Args:
        db (Session): The database session.
        name (str): The name of the grocery item to search for.

    Returns:
        Optional[UUID]: The ID of the grocery item if found, None otherwise.

    Raises:
        HTTPException: If the name is empty or None.
    """
    if not name or not name.strip():
        raise HTTPException(status_code=400, detail="Grocery item name cannot be empty")
    
    grocery_item = db.query(GroceryItem).filter(GroceryItem.name == name.strip()).first()
    return grocery_item.id if grocery_item else None

def validate_grocery_item_name(name: str) -> bool:
    """
    Validates the grocery item name.

    Args:
        name (str): The name to validate.

    Returns:
        bool: True if the name is valid, False otherwise.
    """
    if not name or not isinstance(name, str):
        return False
    
    # Remove leading/trailing whitespace and check length
    cleaned_name = name.strip()
    if len(cleaned_name) < 1 or len(cleaned_name) > 100:  # Assuming reasonable length limits
        return False
    
    return True

def format_grocery_item_response(item_id: UUID, name: str) -> Dict[str, Any]:
    """
    Formats the grocery item response data.

    Args:
        item_id (UUID): The ID of the grocery item.
        name (str): The name of the grocery item.

    Returns:
        Dict[str, Any]: Formatted response dictionary.
    """
    return {
        "id": str(item_id),
        "name": name
    }