# All comments in English.

from docx import Document
from odf.opendocument import load
from odf.text import P
from bs4 import BeautifulSoup
import markdown

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_docx(path):
    doc = Document(path)
    lines = []
    for p in doc.paragraphs:
        lines.append(normalize_newlines(p.text))
    return "\n".join(lines)

def convert_doc(path):
    # DOC (binary) requires LibreOffice headless conversion
    import subprocess, tempfile, os
    tmp = tempfile.mktemp(suffix=".docx")
    subprocess.run(["soffice", "--headless", "--convert-to", "docx", "--outdir", "/tmp", path])
    return convert_docx(tmp)

def convert_odt(path):
    doc = load(path)
    lines = []
    for p in doc.getElementsByType(P):
        text = p.firstChild.data if p.firstChild else ""
        lines.append(normalize_newlines(text))
    return "\n".join(lines)

def convert_txt(path):
    with open(path, "r", encoding="utf-8", errors="ignore") as f:
        return normalize_newlines(f.read())

def convert_md(path):
    with open(path, "r", encoding="utf-8", errors="ignore") as f:
        raw = f.read()
    html = markdown.markdown(raw)
    soup = BeautifulSoup(html, "html.parser")
    return normalize_newlines(soup.get_text())

def convert_html(path):
    with open(path, "r", encoding="utf-8", errors="ignore") as f:
        raw = f.read()
    soup = BeautifulSoup(raw, "html.parser")
    return normalize_newlines(soup.get_text())

def convert_document(path):
    if path.endswith(".docx"):
        return convert_docx(path)
    if path.endswith(".doc"):
        return convert_doc(path)
    if path.endswith(".odt"):
        return convert_odt(path)
    if path.endswith(".txt"):
        return convert_txt(path)
    if path.endswith(".md"):
        return convert_md(path)
    if path.endswith(".html") or path.endswith(".htm"):
        return convert_html(path)
    raise ValueError("Unsupported document format")