# file_utils
import os
import utils.constants as constants
import shutil
from pathlib import Path

def cleanup_temp_files():
    for file_path in constants.temp_files:
        try:
            os.remove(file_path)
        except Exception as e:
            print(f"Failed to delete temp file {file_path}: {e}")

def rename_file_to_lowercase_extension(image_path: str) -> str:
    """
    Renames only the file extension to lowercase by copying it to the temporary folder.

    Parameters:
        image_path (str): The original file path.

    Returns:
        str: The new file path in the temporary folder with the lowercase extension.

    Raises:
        Exception: If there is an error copying the file.
    """
    path = Path(image_path)
    new_suffix = path.suffix.lower()
    new_path = path.with_suffix(new_suffix)

    # Make a copy in the temporary folder with the lowercase extension
    if path.suffix != new_suffix:
        try:
            shutil.copy(path, new_path)
            constants.temp_files.append(str(new_path))
            return str(new_path)
        except FileExistsError:
            raise Exception(f"Cannot copy {path} to {new_path}: target file already exists.")
        except Exception as e:
            raise Exception(f"Error copying file: {e}")
    else:
        return str(path)