"""Парсинг HTML: темы, посты, теги."""

import re
from bs4 import BeautifulSoup


def parse_topics(soup: BeautifulSoup) -> list:
    """Список тем со страницы раздела."""
    items = []
    for div in soup.select("div.structItem"):
        a = div.select_one("div.structItem-title a")
        if not a:
            continue
        m = re.search(r"/topic/(\d+)/", a.get("href", ""))
        if not m:
            continue
        items.append({
            "id": int(m.group(1)),
            "title": a.text.strip(),
            "url": f"https://vwts.ru/forum/topic/{m.group(1)}/"
        })
    return items


def parse_posts(soup: BeautifulSoup) -> list:
    """Посты с одной страницы темы."""
    out = []
    for art in soup.select("article.message"):
        aname = art.select_one("h4.message-name")
        author = aname.get_text(strip=True) if aname else "?"
        t = art.select_one("time.u-dt")
        date = t.get("datetime", "") if t else ""
        n = art.select_one("ul.message-attribution-opposite a")
        num = n.text.strip() if n else ""
        content = art.select_one("div.message-content")
        text = ""
        if content:
            for h in content.select("div[style*='none'], span[style*='none'], details"):
                h.decompose()
            text = content.get_text("\n", strip=True)
        out.append({"author": author, "date": date, "num": num, "text": text})
    return out


def parse_tags(soup: BeautifulSoup) -> list:
    """Теги из шапки темы."""
    return [t.text.strip() for t in soup.select("li.tagItem a")]