from flask import Blueprint, redirect, url_for, request, flash, session
from flaskapp.lib.login import check_is_logged_in
from flaskapp.lib.toornament import get_toornament
from flaskapp.config import secret
import secrets
import urllib.parse

bp = Blueprint('login', __name__)


@bp.route('/login')
def login():
    # if the user is logged in, redirect him to the next-URL or to the index page
    if request.args.get('next'):
        session['next_url'] = request.args.get('next')
    if check_is_logged_in():
        if request.args.get('next'):
            return redirect(request.args.get('next'))
        return redirect(url_for('index.index'))
    state = secrets.token_hex(32)
    session['state'] = state
    params = {
        'response_type': 'code',
        'client_id': secret['oauth_client_id'],
        'redirect_uri': secret['oauth_redirect_uri'],
        'state': state,
        'scope': 'user:info participant:manage_participations'
    }
    url = urllib.parse.urlencode(params)
    url = 'https://account.toornament.com/oauth2/authorize?' + url
    return redirect(url)


@bp.route('/oauth/toornament')
def oauth_callback():
    state = request.args.get('state')
    if state != session.get('state'):
        flash('Login fehlgeschlagen! - Ungültiger OAuth2 State!', 'danger')
        return redirect(url_for('index.index'))
    code = request.args.get('code')
    if not code:
        flash('Login fehlgeschlagen!')
        return redirect(url_for('index.index'))
    toornament = get_toornament(code)
    user_data = toornament.get_user_data()
    session['is_logged_in'] = True
    session['username'] = user_data['name']
    session['user_id'] = user_data['id']
    next_url = session.get('next_url')
    if next_url:
        session.pop('next_url')
        return redirect(next_url)
    return redirect(url_for('index.index'))


@bp.route('/logout')
def logout():
    session.clear()
    flash('Logout erfolgreich!', 'success')
    return redirect(url_for('index.index'))