"""Tool: text_stats — Compute statistics about text."""
import re
from collections import Counter
def text_stats(text: str):
    """Compute word count, char count, sentence count, avg word length, top words."""
    words = re.findall(r"\b\w+\b", text.lower())
    sentences = [s for s in re.split(r"[.!?]+", text) if s.strip()]
    word_lens = [len(w) for w in words]
    return {"word_count": len(words), "char_count": len(text),
            "sentence_count": len(sentences),
            "avg_word_length": sum(word_lens)/max(1,len(word_lens)),
            "top_words": Counter(words).most_common(5)}