import os

from flask import Blueprint, jsonify, request

from db import db
from helper_functions import get_username_from_token_data, extract_token_data, get_token, get_user_id_from_username, return_401
from models import Keyword

keyword_blueprint = Blueprint('keyword', __name__, url_prefix='/api')
__location__ = os.path.realpath(os.path.join(os.getcwd(), os.path.dirname(__file__)))


@keyword_blueprint.route('/keyword', methods=['POST'])
def add_keyword():
    # get username from jwt token
    username = get_username_from_token_data(extract_token_data(get_token()))
    if username is None:  # If token not provided or invalid -> return 401 code
        return return_401()

    request_data = request.get_json()
    key = request_data['keyword']

    check_keyword = db.session.query(Keyword).filter_by(keyword=key, user_id=get_user_id_from_username(username)).first()
    if check_keyword is None:
        # Keyword doesn't exist yet for this user
        new_keyword = Keyword(
            user_id=get_user_id_from_username(username),
            keyword=key
        )
        db.session.add(new_keyword)
        db.session.commit()

        return jsonify({"status": 200, "text": "Successfully added keyword", "data": new_keyword.as_dict()})
    else:
        return jsonify({"status": 500, "text": "Keyword already exist for this user"})


@keyword_blueprint.route('/keyword', methods=['DELETE'])
def remove_keyword():
    # get username from jwt token
    username = get_username_from_token_data(extract_token_data(get_token()))
    if username is None:  # If token not provided or invalid -> return 401 code
        return return_401()

    request_data = request.get_json()
    key = request_data['keyword']

    db.session.query(Keyword).filter_by(keyword=key, user_id=get_user_id_from_username(username)).delete()
    db.session.commit()

    return jsonify({"status": 200, "text": "Successfully removed keyword"})


@keyword_blueprint.route('/keywords', methods=['GET'])
def get_keywords():
    # get username from jwt token
    username = get_username_from_token_data(extract_token_data(get_token()))
    if username is None:  # If token not provided or invalid -> return 401 code
        return return_401()

    return_keywords = []
    keywords = db.session.query(Keyword).filter_by(user_id=get_user_id_from_username(username)).all()

    if keywords is not None:
        for row in keywords:
            return_keywords.append(row.as_dict())

    return jsonify({"status": 200, "text": "Successfully loaded keywords", "data": return_keywords})