import html
import re
from html.parser import HTMLParser


class _HTMLTextExtractor(HTMLParser):
    def __init__(self):
        super().__init__()
        self._chunks = []

    def handle_data(self, data):
        self._chunks.append(data)

    def get_text(self):
        return "".join(self._chunks)


def html_to_text(text: str) -> str:
    parser = _HTMLTextExtractor()
    parser.feed(text)
    parser.close()
    raw = parser.get_text()
    return html.escape(re.sub(r"\s+", " ", raw).strip())


def markdown_to_text(text: str) -> str:
    result = text
    result = re.sub(r"```.*?```", " ", result, flags=re.DOTALL)
    result = re.sub(r"`([^`]*)`", r"\1", result)
    result = re.sub(r"!\[([^\]]*)\]\([^)]*\)", r"\1", result)
    result = re.sub(r"\[([^\]]*)\]\([^)]*\)", r"\1", result)
    result = re.sub(r"^\s{0,3}#{1,6}\s*", "", result, flags=re.MULTILINE)
    result = re.sub(r"(\*\*\*|___)(.+?)\1", r"\2", result)
    result = re.sub(r"(\*\*|__)(.+?)\1", r"\2", result)
    result = re.sub(r"(\*|_)(.+?)\1", r"\2", result)
    result = re.sub(r"^\s*([-*+]|\d+\.)\s+", "", result, flags=re.MULTILINE)
    result = re.sub(r"^\s*>\s*", "", result, flags=re.MULTILINE)
    result = re.sub(r"\s+", " ", result).strip()
    return html.escape(result)