from flask import Blueprint, request, jsonify
import qrcode
import io
import base64
from util.logger import logger
from auth.token import verify_token

qrcode_blueprint = Blueprint('qrcode_tool', __name__)


@qrcode_blueprint.route('/api/qrcode/generate', methods=['POST'])
def generate_qrcode():
    user = verify_token()
    if not user:
        return jsonify({"message": "Nicht autorisiert"}), 401
    try:
        data = request.get_json(silent=True) or {}
        text = data.get("text", "").strip()
        if not text:
            return jsonify({"message": "Text darf nicht leer sein"}), 400

        qr = qrcode.QRCode(box_size=10, border=4)
        qr.add_data(text)
        qr.make(fit=True)
        img = qr.make_image(fill_color="black", back_color="white")

        buffer = io.BytesIO()
        img.save(buffer, format="PNG")
        b64 = base64.b64encode(buffer.getvalue()).decode()

        logger.info(f"QR-Code generiert von {user['username']}")
        return jsonify({"image": f"data:image/png;base64,{b64}"})
    except Exception as e:
        logger.error(f"Fehler QR-Code: {e}")
        return jsonify({"message": "Fehler beim Generieren"}), 500