# -*- coding: utf-8 -*-
"""
Backend base module
"""

import jwt
from flask import Flask, jsonify
from flask_httpauth import HTTPTokenAuth, HTTPBasicAuth, MultiAuth
from flask_jwt_extended import JWTManager, decode_token
from flask_login import LoginManager
from flask_sqlalchemy import SQLAlchemy

app = Flask(__name__)
app.config.from_object('backend.config.Config')
db = SQLAlchemy(app)


login_manager = LoginManager()
login_manager.init_app(app)

# flask_jwt_extended: to be used usually by API
jwt_extended = JWTManager(app)
#
jwt_auth = HTTPTokenAuth('Bearer')


@jwt_auth.verify_token
def verify_token(token):
    """This function (and HTTPTokenAuth('Bearer')) has been defined to be used together with MultiAuth. For API calls
    solely using JWT authentication, jwt_required of flask_jwt_extended should be used directly."""
    app.logger.info(token)
    try:
        decoded = decode_token(token)
    except jwt.exceptions.DecodeError as e:
        app.logger.warn("Could not verify token: {}".format(str(e)))
        return False
    except jwt.exceptions.ExpiredSignatureError as e:
        app.logger.warn("Could not verify token: {}".format(str(e)))
        return False
    app.logger.info(decoded)
    return True
    

basic_auth = HTTPBasicAuth()
multi_auth = MultiAuth(basic_auth, jwt_auth)

from backend.auth import oidc_auth, auth_bp

oidc_auth.init_app(app)

# oidc_multi_auth = MultiAuth(oidc_auth, jwt_auth) <- can't work as OIDCAuthentication not implementing HTTPAuth

from .serve_frontend import fe_bp
from .api import auth_api_bp, api_v1, api_bp

app.register_blueprint(auth_bp)
app.register_blueprint(auth_api_bp)
app.register_blueprint(api_bp)
app.register_blueprint(fe_bp)

# Fix flask-restplus by duck typing error handlers
jwt_extended._set_error_handler_callbacks(api_v1)