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

regex_blueprint = Blueprint('regex_tool', __name__)

_FLAG_MAP = {"i": re.IGNORECASE, "m": re.MULTILINE, "s": re.DOTALL}


@regex_blueprint.route('/api/regex/test', methods=['POST'])
def test_regex():
    user = verify_token()
    if not user:
        return jsonify({"message": "Nicht autorisiert"}), 401
    try:
        data = request.get_json(silent=True) or {}
        pattern = data.get("pattern", "")
        text = data.get("text", "")
        flags_list = data.get("flags", [])

        combined = 0
        for f in flags_list:
            if f in _FLAG_MAP:
                combined |= _FLAG_MAP[f]

        try:
            compiled = re.compile(pattern, combined)
        except re.error as e:
            return jsonify({"matches": [], "count": 0, "error": str(e)})

        matches = [
            {"match": m.group(), "start": m.start(), "end": m.end(), "groups": list(m.groups())}
            for m in compiled.finditer(text)
        ]

        logger.info(f"Regex getestet von {user['username']}")
        return jsonify({"matches": matches, "count": len(matches), "error": None})
    except Exception as e:
        logger.error(f"Fehler Regex-Tester: {e}")
        return jsonify({"message": "Fehler beim Testen"}), 500