from flask import Flask, render_template, jsonify
import json
import os

app = Flask(__name__, static_folder='static')

DATEN_DATEI = "session_daten.json"

def lade_daten():
    if os.path.exists(DATEN_DATEI):
        with open(DATEN_DATEI, "r", encoding="utf-8") as f:
            return json.load(f)
    return {"status": "wartend", "sessions": []}

@app.route("/")
def index():
    daten = lade_daten()
    return render_template("dashboard.html", daten=daten)

@app.route("/api/daten")
def api_daten():
    return jsonify(lade_daten())

if __name__ == "__main__":
    app.run(host="0.0.0.0", port=5000, debug=True)