import bcrypt
import jwt
from apiflask import abort
from app.db import database as db
from app.models import User
from flask import current_app
from flask import request, jsonify


def hash_password(password):
    return bcrypt.hashpw(password.encode("utf-8"), bcrypt.gensalt())


def check_password(hashed_password, user_password):
    return bcrypt.checkpw(user_password, hashed_password)


def get_email_from_token_data(token):
    if token is None or len(token) < 2:
        return None
    else:
        token = token[1]

    if token is not None:
        if ':' in token:  # Maybe bot token, check if token valid and return username after ":" then
            telegram_user_id = token.split(":")[1]
            token = token.split(":")[0]

            try:
                if jwt.decode(token, current_app.config['SECRET_KEY'], algorithms=["HS256"])['email'] == current_app.config['BOT_EMAIL']:
                    res = db.session.query(User).filter_by(telegram_user_id=telegram_user_id).first()

                    if res is not None:
                        return res.as_dict()['email']
                    else:
                        return None
                else:
                    return None
            except jwt.PyJWTError:
                return None

        else:  # "Normal" token, extract username from token
            try:
                return jwt.decode(token, current_app.config['SECRET_KEY'], algorithms=["HS256"])['email']
            except jwt.PyJWTError:
                return None


def get_token():
    if 'Authorization' in request.headers:
        return request.headers['Authorization'].split(" ")
    else:
        return None


def get_email_or_abort_401():
    # get username from jwt token
    email = get_email_from_token_data(get_token())

    if email is None:  # If token not provided or invalid -> return 401 code
        abort(401, message="Unable to login")

    return email


def abort_if_no_admin():
    if not is_user_admin():
        abort(401, message="Only admin users can access this")


def is_user_admin():
    email = get_email_or_abort_401()

    return db.session.query(User).filter_by(email=email).first().admin


def make_response(data, status=200, text=""):
    return jsonify({"status": status, "text": text, "data": data})


def get_user(email):
    query_user = db.session.query(User).filter_by(email=email).first()

    if query_user is None:  # Username doesn't exist
        abort(500, message="Can't find user")

    return query_user