from flask import Blueprint, request, jsonify
from collections import Counter
import re
from util.logger import logger
from auth.token import verify_token

stringutils_blueprint = Blueprint('stringutils_tool', __name__)


@stringutils_blueprint.route('/api/string/analyze', methods=['POST'])
def string_analyze():
    user = verify_token()
    if not user:
        return jsonify({"message": "Nicht autorisiert"}), 401
    try:
        data = request.get_json() or {}
        text = data.get("text", "")
        operation = data.get("operation", "stats")

        if operation == "stats":
            words = text.split() if text.strip() else []
            lines = text.split('\n')
            return jsonify({
                "operation": "stats",
                "chars": len(text),
                "chars_no_spaces": len(text.replace(' ', '')),
                "words": len(words),
                "lines": len(lines),
                "spaces": text.count(' '),
            })
        elif operation == "uppercase":
            return jsonify({"operation": "uppercase", "result": text.upper()})
        elif operation == "lowercase":
            return jsonify({"operation": "lowercase", "result": text.lower()})
        elif operation == "titlecase":
            return jsonify({"operation": "titlecase", "result": text.title()})
        elif operation == "reverse":
            return jsonify({"operation": "reverse", "result": text[::-1]})
        elif operation == "trim":
            return jsonify({"operation": "trim", "result": text.strip()})
        elif operation == "remove_spaces":
            return jsonify({"operation": "remove_spaces", "result": text.replace(' ', '')})
        elif operation == "count_words":
            words = re.findall(r'\b\w+\b', text.lower())
            counter = Counter(words)
            top10 = [{"word": w, "count": c} for w, c in counter.most_common(10)]
            return jsonify({"operation": "count_words", "words": top10})
        else:
            return jsonify({"message": "Unbekannte Operation"}), 400

    except Exception as e:
        logger.error(f"Fehler stringutils: {e}")
        return jsonify({"message": "Fehler bei der Verarbeitung"}), 500