"""Flask-Blueprint für WhatsApp-Webhook-Endpunkt."""

from flask import Blueprint, request, jsonify

from src.queue.webhook import verify_whatsapp_signature
from src.models.submission import Submission

whatsapp_bp = Blueprint("whatsapp", __name__)


@whatsapp_bp.route("/webhook/whatsapp", methods=["GET", "POST"])
def whatsapp_webhook() -> tuple:
    """WhatsApp Webhook-Endpunkt.

    GET = Verifikation (Hub Challenge)
    POST = Eingehende Nachricht mit Signaturprüfung
    """
    # GET = Verifikation (Hub Challenge)
    if request.method == "GET":
        mode = request.args.get("hub.mode")
        token = request.args.get("hub.verify_token")
        challenge = request.args.get("hub.challenge")
        if mode == "subscribe" and token == "bsn_verify_token":
            return challenge, 200
        return "Verification failed", 403

    # POST = Eingehende Nachricht
    signature = request.headers.get("X-Hub-Signature-256", "")
    payload = request.get_data()

    if not verify_whatsapp_signature(payload, signature):
        return jsonify({"error": "Invalid signature"}), 401

    # Hier würde die Submission in die Queue eingereiht werden
    # qh = current_app.queue_handler
    return jsonify({"status": "accepted"}), 200