"""
Script description: This script imports the main module of this library
and also provides unit testing commands for development. 

Libraries imported:
-------------------
- yaml: Module implementing the data serialization used for human readable documents.
- streamlit: Framework used to build pure Python web applications.
"""

import yaml
import streamlit as st
import streamlit.components.v1 as components
from yaml.loader import SafeLoader

from .views import Authenticate
from .utilities import *

_RELEASE = True

if not _RELEASE:
    # Loading config file
    with open('../config.yaml', 'r', encoding='utf-8') as file:
        config = yaml.load(file, Loader=SafeLoader)

    # Pre-hashing all plain text passwords once
    # Hasher.hash_passwords(config['credentials'])

    # Creating the authenticator object
    authenticator = Authenticate(
        config['credentials'],
        config['cookie']['name'],
        config['cookie']['key'],
        config['cookie']['expiry_days'],
        api_key='ajdmgj2v4hx57py9fdmzikjpm6cj0hhs'
    )

    # authenticator = Authenticate(
    #     '../config.yaml'
    # )

    # Creating a login widget
    try:
        authenticator.login()
    except LoginError as e:
        st.error(e)

    # Creating a guest login button
    try:
        authenticator.experimental_guest_login('Login with Google', provider='google',
                                               oauth2=config['oauth2'])
        authenticator.experimental_guest_login('Login with Microsoft', provider='microsoft',
                                               oauth2=config['oauth2'])
    except LoginError as e:
        st.error(e)

    # Authenticating user
    if st.session_state.get('authentication_status'):
        authenticator.logout()
        st.write(f'Welcome *{st.session_state["name"]}*')
        st.title('Some content')
    elif st.session_state.get('authentication_status') is False:
        st.error('Username/password is incorrect')
    elif st.session_state.get('authentication_status') is None:
        st.warning('Please enter your username and password')

    # Creating a password reset widget
    if st.session_state.get('authentication_status'):
        try:
            if authenticator.reset_password(st.session_state['username']):
                st.success('Password modified successfully')
        except (CredentialsError, ResetError) as e:
            st.error(e)

    # Creating a new user registration widget
    try:
        (email_of_registered_user,
         username_of_registered_user,
         name_of_registered_user) = authenticator.register_user()
        if email_of_registered_user:
            st.success('User registered successfully')
    except (CloudError, RegisterError) as e:
        st.error(e)
    
    # Creating a forgot password widget
    try:
        (username_of_forgotten_password,
         email_of_forgotten_password,
         new_random_password) = authenticator.forgot_password(two_factor_auth=True, send_email=True)
        if username_of_forgotten_password:
            st.success('New password sent securely')
            # Random password to be transferred to the user securely
        elif not username_of_forgotten_password:
            st.error('Username not found')
    except (CloudError, ForgotError) as e:
        st.error(e)

    # Creating a forgot username widget
    try:
        (username_of_forgotten_username,
         email_of_forgotten_username) = authenticator.forgot_username(two_factor_auth=True, send_email=True)
        if username_of_forgotten_username:
            st.success('Username sent securely')
            # Username to be transferred to the user securely
        elif not username_of_forgotten_username:
            st.error('Email not found')
    except (CloudError, ForgotError) as e:
        st.error(e)

    # Creating an update user details widget
    if st.session_state.get('authentication_status'):
        try:
            if authenticator.update_user_details(st.session_state['username']):
                st.success('Entry updated successfully')
        except UpdateError as e:
            st.error(e)

    # Saving config file
    with open('../config.yaml', 'w', encoding='utf-8') as file:
        yaml.dump(config, file, default_flow_style=False, allow_unicode=True)