from flask import Flask, render_template
import uuid
import csv
import os

app = Flask(__name__)
app.jinja_env.trim_blocks = True
app.jinja_env.lstrip_blocks = True

datafile = "data.csv"

@app.route('/')
def index():
    return render_template('index.html', title='Test', text='Hallo, Fooboar') 

@app.route('/form')
def form():
    id = generate_id()
    return render_template('form.html', title='Test', text='Hallo, Fooboar', your_id=id) 

@app.route('/result')
def result():
    return render_template('result.html', hausname='Knuth', haustext='Mitglieder dieses Hauses mögen LaTeX-Anzüge und Eisbären.', id=123) 

@app.route('/admin')
def admin():
    return render_template('admin.html', title='Test', text='Hallo, Admin Fooboar') 

@app.route('/answers')
def answers():
    return render_template('answers.html', title='Test', text='Hallo, Admin Fooboar') 

@app.route('/solution')
def solution():
    return render_template('solution.html', title='Test', text='Hallo, Lösung') 

def generate_id():
    data = list()

    if not os.path.exists(datafile):
        open(datafile, "a").close()

    with open(datafile, "r") as f:
        reader = csv.reader(f)
        for line in reader:
            data.append(line[0])

    # best loop ever
    while True:
        new_id = str(uuid.uuid1()).split("-")[0]

        if new_id in data:
            break
        else:
            return new_id