import subprocess
import json
import time
from flask import Flask, request, jsonify, session
from I2C_Function import analyze_data, read_data
from flask_cors import CORS
from flask_session import Session

app = Flask(__name__)
app.config.from_pyfile('config.py')
Session(app)
CORS(app)

initialized = False

@app.route('/trng/randomNum/init', methods=['GET'])
def initialize_generator():
    #quantity = 1
    #bits = 1
    #startup = True  # Boolean-Wert für die Initialisierung
    global initialized  # Zugriff auf die globale Variable

    #result = analyze_data(int(quantity), int(bits), startup=true)
    result = analyze_data(int(1), int(1), startup=True)
    #session['initialized'] = True

    if result is True:
        initialized = True
        return jsonify({'error': 'successful operation; random number generator is ready and random numbers can be requested'}), 200
    else:
        return jsonify({'error': 'Unable to initialize the random number generator within a timeout of 60 seconds.'}), 555


@app.route('/trng/randomNum/getRandom', methods=['GET'])
def get_random_numbers():
    global initialized  # Zugriff auf die globale Variable
    quantity = request.args.get('quantity')
    bits = request.args.get('numBits')

    if not quantity.isdigit() or not bits.isdigit():
        return jsonify({'error': 'Invalid input. Quantity and bits must be numeric.'}), 400

    if int(quantity) <= 0 or int(bits) <= 0:
        return jsonify({'error': 'Invalid input. Quantity and bits must be positive integers.'}), 400
    
    # Überprüfe den Initialisierungsstatus
    if not initialized:
        return jsonify({'error': 'system not ready; try init'}), 432

    #if 'initialized' not in session or not session['initialized']:
        #return jsonify({'error': 'system not ready; try init'}), 432
    
    #if 'initialized' not in session or not session['initialized', 'false']:
        #return jsonify({'error': 'system not ready; try init'}), 432    

    filename = analyze_data(int(quantity), int(bits), startup=False)
    
    if filename is False:
        return jsonify({'error': 'Unable to generate random numbers.'}), 500
    if filename:
        return filename, 200
    else:
        return jsonify({'error': 'Unable to generate random numbers.'}), 500
    
@app.route('/trng/randomNum/shutdown', methods=['GET'])
def shutdown_generator(): 
    global initialized  # Zugriff auf die globale Variable

    initialized = False  # Setze den Initialisierungsstatus zurück
    #session['initialized'] = False

    # Beispielantwort
    return jsonify({'message': 'Generator shutdown successfully.'}), 200

if __name__ == '__main__':
    # Pfade zu den SSL-Zertifikat- und Schlüsseldateien
    #cert_path = '/etc/nginx/ssl/server.crt'
    #key_path = '/etc/nginx/ssl/server.key'
    cert_path = '/etc/nginx/ssl/cert-gmtrom.pem'
    key_path = '/etc/nginx/ssl/cert-gmtrom-key.pem'
    
    # Starte die Flask-Anwendung mit SSL-Konfiguration
    #app.run(host='172.16.78.57', port=5000, ssl_context=(cert_path, key_path))
    app.run(host='0.0.0.0', ssl_context=(cert_path, key_path))
    #app.run(host='0.0.0.0', ssl_context=adhoc)
    #app.run(ssl_context=(cert_path, key_path))