import os
import streamlit as st
import yaml
from yaml.loader import SafeLoader

config = None
def get_config():
    global config
    if config is None:
        with open(os.getcwd()+'/config/users.yml') as file:
            config = yaml.load(file, Loader=SafeLoader)
    return config

def authenticate():
    try:
        if st.session_state["authentication_status"]:
            pass
        else:
            print('Not authenticated')
            st.switch_page('main.py')
    except KeyError:
        print('No Key found')
        st.switch_page('main.py')

def make_logout_section():
    with st.sidebar:
        st.write("Hallo " + st.session_state['name'])
        st.page_link('pages/user.py', label='Benutzer')
        st.page_link('main.py', label='Hauptseite')
        st.session_state['authenticator'].logout()
        st.divider()


def get_config_groups():
    config = get_config()
    groups = config['groups']
    return groups

def get_config_dashboards():
    config = get_config()
    dashboards = config['dashboards']
    return dashboards

def get_groups():
    config = get_config()
    user = config['credentials']['usernames'][st.session_state['username']]
    groups = user['groups']
    return groups

def get_dashboards():
    config = get_config()
    groups = get_groups()
    dashboards = set()
    dash = config['dashboards']
    for d in dash:
        for dg in dash[d]['groups']:
            if dg in groups:
                dashboards.add(d)
    return dashboards

def make_dashboard_section():
    with st.sidebar:
        dashboards = get_config_dashboards()
        for d in get_dashboards():
            st.page_link(dashboards[d]['path'], label=d)