# All comments in English.

import pypandoc
from bs4 import BeautifulSoup

def normalize_newlines(value):
    if value is None:
        return ""
    return (
        str(value)
        .replace("\r\n", "\\n")
        .replace("\n\r", "\\n")
        .replace("\r", "\\n")
        .replace("\n", "\\n")
    )

def convert_document(path):
    """
    Converts any supported document to plain text using Pandoc.
    Supported formats:
    - doc
    - docx
    - odt
    - txt
    - md
    - html
    """

    try:
        # Pandoc converts everything to plain text
        text = pypandoc.convert_file(path, "plain")
    except Exception as e:
        raise RuntimeError(f"Pandoc conversion failed: {str(e)}")

    # Clean HTML artifacts if any
    soup = BeautifulSoup(text, "html.parser")
    cleaned = soup.get_text()

    return normalize_newlines(cleaned)