import os

from apiflask import APIBlueprint, abort
from flask import jsonify

from db import db
from helper_functions import get_user_id_from_username, get_username_or_abort_401
from auth import auth
from scheme import KeywordResponseSchema, KeywordSchema, DeleteSuccessfulSchema
from models import Keyword

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


@keyword_blueprint.route('/keyword', methods=['POST'])
@keyword_blueprint.output(KeywordResponseSchema(many=True), 200)
@keyword_blueprint.input(schema=KeywordSchema)
@keyword_blueprint.auth_required(auth)
@keyword_blueprint.doc(summary="Add new keyword", description="Adds new keyword for current user")
def add_keyword(data):
    username = get_username_or_abort_401()

    check_if_keyword_data_exists(data)

    key = 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:
        abort(500, message="Keyword already exist for this user")


@keyword_blueprint.route('/keyword', methods=['DELETE'])
@keyword_blueprint.output(DeleteSuccessfulSchema, 200)
@keyword_blueprint.input(schema=KeywordSchema)
@keyword_blueprint.auth_required(auth)
@keyword_blueprint.doc(summary="Removes existing keyword", description="Removes existing keyword for current user")
def remove_keyword(data):
    username = get_username_or_abort_401()

    check_if_keyword_data_exists(data)

    key = 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", "data": {}})


@keyword_blueprint.route('/keywords', methods=['GET'])
@keyword_blueprint.output(KeywordResponseSchema(many=True), 200)
@keyword_blueprint.auth_required(auth)
@keyword_blueprint.doc(summary="Returns all keywords", description="Returns all keywords for current user")
def get_keywords():
    username = get_username_or_abort_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})


def check_if_keyword_data_exists(data):
    if "keyword" not in data:
        abort(400, message="Keyword missing")

    if data['keyword'] == "" or data['keyword'] is None:
        abort(400, message="Keyword missing")