import sqlalchemy as sa
import datetime #<- will be used to set default dates on models

from sqlalchemy import or_
from ..models.blog_record import BlogRecord, Topics, Tags


class BlogRecordService(object):

    @classmethod
    def by_topic(cls, request, topic, tag):
        # get posts by topic
        query = request.dbsession.query(BlogRecord).filter(BlogRecord.topic_id == topic)
        if tag != '':
            query = query.filter(BlogRecord.tag == tag)
        query = query.order_by(BlogRecord.tag, BlogRecord.title).all()
        return query

    @classmethod
    def by_criteria(cls, request, criteria):
        search = "%{}%".format(criteria)
        query = request.dbsession.query(BlogRecord).filter(or_(BlogRecord.title.like(search),
                                                                BlogRecord.body.like(search))).all()
        return query

    @classmethod
    def by_id(cls, request, _id):
        query = request.dbsession.query(BlogRecord).filter(BlogRecord.id == _id).first()
        return query

    @classmethod
    def get_last_created(cls, request):
        # gest the last created posts
        query = request.dbsession.query(BlogRecord).filter(BlogRecord.topic_id != 'ADM')
        query = query.order_by(sa.desc(BlogRecord.created)).limit(5).all()
        return query

    @classmethod
    def get_activities(cls, request):
        # gest the Activities section
        query = request.dbsession.query(BlogRecord).filter(BlogRecord.topic_id != 'ADM' and BlogRecord.tag != 'Activities')
        query = query.order_by(sa.desc(BlogRecord.created)).first()
        return query

    @classmethod
    def get_tags_byTopic(cls, request, topic):
        # gest the last 5 items modified
        query = request.dbsession.query(Tags).filter(Tags.topic == topic)
        query = query.order_by(Tags.tag_name).all()
        return query

    @classmethod
    def get_tags_byId(cls, request, id):
        # gest the last 5 items modified
        query = request.dbsession.query(Tags).filter(Tags.id == id).first()
        return query

    @classmethod
    def get_topic_byTopic(cls, request, id):
        # get the name of a given topic
        query = request.dbsession.query(Topics).filter(Topics.topic == id).first()
        return query

    @classmethod
    def get_topics(cls, request):
        # get all topics
        query = request.dbsession.query(Topics).order_by(Topics.topic).all()
        return query

    @classmethod
    def delete(cls, request, id):
        request.dbsession.query(BlogRecord).filter(BlogRecord.id == id).delete(synchronize_session=False)
        return 

    @classmethod
    def tag_delete(cls, request, id):
        request.dbsession.query(Tags).filter(Tags.id == id).delete(synchronize_session=False)
        return 

    @classmethod
    def topic_delete(cls, request, id):
        request.dbsession.query(Topics).filter(Topics.topic == id).delete(synchronize_session=False)
        return