from flask import render_template, url_for, flash, redirect, jsonify, request, session
from lernplattform import app
from lernplattform.models import User

from lernplattform import db
from lernplattform.classes import login

@app.route('/')
def index():
    """
    Renders the main page of the application.
    This function checks if a user is logged in by checking for a 'user_name' cookie.
    If the user is logged in, it retrieves the username from the database using the cookie value.
    If not, it defaults to 'Gast'. The main page is then rendered with the current username.
    
    Returns:
        A rendered HTML template with the current username.
    """
    login.check_logged_in()

    # Render the main page with the current username
    return render_template('index.html', page='index', user_name=session['username'])


@app.route('/login', methods=['GET', 'POST'])
def userlogin():
    if request.method == 'POST':
        #data = request.form
        if request.form.get('form_id') == 'login':
            if login.login(request.form):
            # get username, password, remember from form
                flash('Login erfolgreich!', 'login')
                return redirect(url_for('index'))
            else:
                flash('Ungültiger Benutzername, Passwort oder Registrierung noch nicht bestätigt.', 'login')

    # Render the main page with the current username
    return render_template('index.html', page='index', user_name=session['username'])


@app.route('/register', methods=['GET', 'POST'])
def register():
    if request.method == 'POST':
        if login.register(request):
            flash('''
                Du erhältst in den nächsten Minuten eine eMail mit einem Bestätigungslink. 
                Bitte klicke auf diesen Link, um deine Registrierung abzuschließen.
                ''', 'register')
        
            return redirect(url_for('index'))


    return render_template('index.html', page='register', user_name=session['username'])