import os
import xml.etree.ElementTree as ET

def make_absolute_path(path, base_path):
    if not os.path.isabs(path) and os.path.isdir(base_path):
        try:
            return os.path.abspath(os.path.join(base_path, path))
        except Exception:
            pass  # На случай сбоя в os.path.join или abspath
    elif os.path.isabs(path):
        return os.path.abspath(path)
    else:
        return path


def make_relative_path(abs_path, base_path):
    abs_path = os.path.abspath(abs_path)
    base_path = os.path.abspath(base_path)

    # Разбиваем на списки директорий
    abs_parts = abs_path.split(os.sep)
    base_parts = base_path.split(os.sep)

    # Проверяем, является ли base_path настоящим префиксом пути (по папкам)
    if abs_parts[:len(base_parts)] == base_parts:
        rel_parts = abs_parts[len(base_parts):]
        return "/".join(rel_parts)

    # Иначе пробуем relpath
    try:
        return os.path.relpath(abs_path, base_path).replace("\\", "/")
    except Exception:
        return abs_path.replace("\\", "/")

def indent_xml(elem, level=0):
    indent = "  "
    i = "\n" + level * indent
    if len(elem):
        if not elem.text or not elem.text.strip():
            elem.text = i + indent
        for child in elem:
            indent_xml(child, level + 1)
        if not elem.tail or not elem.tail.strip():
            elem.tail = i
    else:
        if level and (not elem.tail or not elem.tail.strip()):
            elem.tail = i


def fwrite(root, xml_full_path):
    indent_xml(root)
    ET.ElementTree(root).write(xml_full_path, encoding="utf-8", xml_declaration=True)

    
def safe_parse_xml(xml_path):
    """
    Безопасно парсит XML-файл.

    Возвращает кортеж (root, tree) или (None, None) при ошибках.
    """
    if not xml_path or not os.path.isfile(xml_path):
        print(f"Файл '{xml_path}' не найден или путь пустой")
        return None, None

    try:
        if os.path.getsize(xml_path) == 0:
            return None, None

        tree = ET.parse(xml_path)
        root = tree.getroot()
        return root, tree

    except ET.ParseError as e:
        print(f"Ошибка парсинга XML файла '{xml_path}': {e}")
        return None, None
    except Exception as e:
        print(f"Неожиданная ошибка при чтении XML файла '{xml_path}': {e}")
        return None, None