from flask import Flask,render_template,request
from fib_gen import fib_generator
import logging

logging.basicConfig( format='%(asctime)-15s [%(levelname)s] %(funcName)s: %(message)s', level=logging.DEBUG)
app = Flask(__name__)

@app.route('/')
def index():
  return render_template('index.html')

@app.route('/fib',methods=['GET','POST'])
def fib():
  fibg = fib_generator()
  result = ''
  logging.debug(f'request.method={request.method}')
  if request.method == 'POST':
     element = request.form['element']
     
     logging.debug(f'berechne Element:{element}')

     n= int(element)
     #formel= str(n-2) + '+' + str(n-1)
     formel = '' # Berechnungsformel initialisieren.
     if element != None:
       for i in range(n+1):
         fib = next(fibg)
         if i == n-2: # fib(n-2) zur Berechnungsformel dazu

           formel += str(fib)
         if i == n-1: # fib(n-1) mit + Zeichen zur Berechnungsformel dazu
           formel += '+' + str(fib)
         
       logging.debug(f'Fibonacci-Zahl: {fib}')
       logging.debug(f'formel={formel}')
       result=str(fib)
  elif request.method == 'GET':
    logging.debug('GET-Request')
  return render_template('index.html', result=result,formel=formel)

if __name__ == '__main__':
  app.run(host='0.0.0.0',port=8085, debug=True)