from urllib.parse import urlencode, parse_qs

import flask
from flask import Blueprint, redirect
from flask import current_app, session
from flask.templating import render_template
from flask_babel import gettext

from flask import request, url_for, jsonify
from flask_login import login_required, login_user, logout_user, current_user
import logging
from urllib.parse import urlparse
from base64 import b64decode, b64encode
import http
import crypt
import ory_hydra_client
from datetime import datetime
import logging
import json

from ..model import db, User, SecurityUser, UserSignUp
from ..form.auth import ConsentForm, LoginForm, RegistrationForm
from ..auth_providers import AUTH_PROVIDER_LIST


logger = logging.getLogger(__name__)

auth_views = Blueprint('auth', __name__, url_prefix='/auth')


@auth_views.route('/consent', methods=['GET', 'POST'])
def consent():
    """Always grant consent."""
    # DUMMPY ONLY

    form = ConsentForm()
    remember_for = 60*60*24*30  # remember for 30 days

    try:
        consent_request = current_app.hydra_api.get_consent_request(
                                    request.args['consent_challenge'])
    except ory_hydra_client.exceptions.ApiValueError:
        logger.info('ory exception - could not fetch user data ApiValueError')
        return redirect(url_for('frontend.index'))
    except ory_hydra_client.exceptions.ApiException:
        logger.exception('ory exception - could not fetch user data')
        return redirect(url_for('frontend.index'))

    requested_scope = consent_request.requested_scope["value"]
    requested_audiences = consent_request.requested_access_token_audience["value"]

    if form.validate_on_submit() or consent_request.skip:
        user = User.query.get(consent_request.subject)
        token_data = {
            'name': str(user.username),
            'preferred_username': str(user.username),
            'email': str(user.email),
            'email_verified': True,
            'groups': [group.name for group in user.groups]
        }
        id_token_data = {}
        if 'openid' in requested_scope:
            id_token_data = token_data
        resp = current_app.hydra_api.accept_consent_request(
            consent_request.challenge, body={
                'grant_scope': requested_scope,
                'grant_access_token_audience': requested_audiences,
                'remember': form.data['remember'],
                'remember_for': remember_for,
                'session': {
                    'access_token': token_data,
                    'id_token': id_token_data
                }
            })
        return redirect(resp.redirect_to)
    return render_template(
            'auth/consent.html.j2',
            form=form,
            client=consent_request.client,
            requested_scope=requested_scope,
            requested_audiences=requested_audiences)


@auth_views.route('/login', methods=['GET', 'POST'])
def login():
    login_challenge = request.args.get('login_challenge')
    try:
        login_request = current_app.hydra_api.get_login_request(login_challenge)
    except ory_hydra_client.exceptions.ApiException as e:
        logger.exception("could not fetch login request")
        return redirect(url_for('frontend.index'))

    if login_request.skip:
        resp = current_app.hydra_api.accept_login_request(
            login_challenge,
            body={'subject': login_request.subject})
        return redirect(resp.redirect_to)
    form = LoginForm()
    if form.validate_on_submit():
        user = User.query_().by_username(form.data['name'])
        if user:
            session['username'] = str(user.username)
        else:
            session['user'] = None
        session['auth_providers'] = []
        return redirect(
                url_for('auth.login_auth', login_challenge=login_challenge))
    return render_template('auth/login.html.j2', form=form)


@auth_views.route('/login/auth', methods=['GET', 'POST'])
def login_auth():
    login_challenge = request.args.get('login_challenge')
    try:
        login_request = current_app.hydra_api.get_login_request(login_challenge)
    except ory_hydra_client.exceptions.ApiValueError:
        return redirect(url_for('frontend.index'))

    if 'username' not in session:
        return redirect(url_for('auth.login'))
    auth_forms = {}
    user = User.query_().by_username(session['username'])
    for auth_provider in AUTH_PROVIDER_LIST:
        form = auth_provider.get_form()
        if auth_provider.get_name() not in session['auth_providers'] and\
           auth_provider.check_auth(user, form):
            session['auth_providers'].append(auth_provider.get_name())

        if auth_provider.get_name() not in session['auth_providers']:
            auth_forms[auth_provider.get_name()]=form

    if len(session['auth_providers']) >= 2:
        remember_me = True
#       if db_user is None:
#           db_user = User(username=session['username'])
#           db.session.add(db_user)
#           db.session.commit()

        subject = user.id
        user.last_login = datetime.now()
        db.session.commit()
        resp = current_app.hydra_api.accept_login_request(
            login_challenge, body={
                'subject': subject,
                'remember': remember_me,
            })
        return redirect(resp.redirect_to)
    return render_template('auth/login_auth.html.j2', forms=auth_forms)


@auth_views.route("/logout")
def logout():
    logout_challenge = request.args.get('logout_challenge')
    # TODO confirm
    resp = current_app.hydra_api.accept_logout_request(logout_challenge)
    return redirect(resp.redirect_to)


@auth_views.route("/error", methods=["GET"])
def auth_error():
    error = request.args.get('error')
    error_description = request.args.get('error_description')

    return render_template('auth/error.html.j2', error=error, error_description=error_description)


@auth_views.route("/sign_up", methods=["GET"])
def sign_up():
    form = RegistrationForm()
    return render_template('auth/sign_up.html.j2', form=form)

@auth_views.route("/sign_up", methods=["POST"])
def sign_up_submit():
    form = RegistrationForm()
    if form.validate_on_submit():
        user = UserSignUp()
        user.username = form.data['username']
        user.password = crypt.crypt(form.data['password'])
        user.alternative_email = form.data['alternative_email']
        db.session.add(user)
        db.session.commit()
        return jsonify({})
    return jsonify({
            'status': 'error',
            'errors': form.errors
        })