import os
import shutil
from datetime import datetime
import re
# TODO: make it use color_text instead of fixed vals
# from .kivy_markup_helper import color_text


# utility functions
def write_crash(e: Exception):
    index = datetime.today()
    error = f"[b][color=#fa0000][ {index} ]:[/color][/b]\n(\n\n{e}\n\n)\n"
    try:
        with open("crashdump.txt", "a") as file:
            file.write(error)
    except Exception:
        with open("crashdump.txt", "w") as file:
            file.write(error)
    return index


def read_crash_file():
    crash_file_path = "./crashfile.txt"
    if not os.path.exists(crash_file_path):
        return None
    else:
        with open(crash_file_path, "r") as file:
            return file.read()


def move_file(source_path, dest_path):
    try:
        path = shutil.move(source_path, dest_path)
        return (1, path)
    except Exception as e:
        return (0, e)


def sanitize_filename(filename: str):
    """
    Sanitize a string to be safe for use as a file name.

    :param filename: The original filename string.
    :return: A sanitized filename string.
    """
    # List of characters not allowed in filenames on various operating systems
    invalid_chars = r'[<>:"/\\|?*\0]'
    reserved_names = {
        "CON",
        "PRN",
        "AUX",
        "NUL",
        "COM1",
        "COM2",
        "COM3",
        "COM4",
        "COM5",
        "COM6",
        "COM7",
        "COM8",
        "COM9",
        "LPT1",
        "LPT2",
        "LPT3",
        "LPT4",
        "LPT5",
        "LPT6",
        "LPT7",
        "LPT8",
        "LPT9",
    }

    # Replace invalid characters with an underscore
    sanitized = re.sub(invalid_chars, "_", filename)

    # Remove leading and trailing whitespace
    sanitized = sanitized.strip()

    # Check for reserved filenames
    name, ext = os.path.splitext(sanitized)
    if name.upper() in reserved_names:
        name += "_file"
        sanitized = name + ext

    # Ensure the filename is not empty
    if not sanitized:
        sanitized = "default_filename"

    return sanitized


# Example usage
unsafe_filename = "CON:example?file*name.txt"
safe_filename = sanitize_filename(unsafe_filename)
print(safe_filename)  # Output: 'CON_example_file_name.txt'