import os

from apiflask import APIBlueprint, abort

from db import db
from helper_functions import make_response, get_email_or_abort_401
from auth import auth
from schema 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):
    email = get_email_or_abort_401()

    check_if_keyword_data_exists(data)

    key = data['keyword']

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

        return make_response(new_keyword.as_dict(), 200, "Successfully added keyword")
    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):
    email = get_email_or_abort_401()

    check_if_keyword_data_exists(data)

    key = data['keyword']

    check_keyword = db.session.query(Keyword).filter_by(keyword=key, email=email).first()

    if check_keyword is None:
        return make_response({}, 500, "Keyword doesn't exist for this user")
    else:
        db.session.query(Keyword).filter_by(keyword=key, email=email).delete()
        db.session.commit()

        return make_response({}, 200, "Successfully removed keyword")


@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():
    email = get_email_or_abort_401()

    return_keywords = []
    keywords = db.session.query(Keyword).filter_by(email=email).all()

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

    return make_response(return_keywords, 200, "Successfully loaded 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")