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

from sqlalchemy import or_
from paginate_sqlalchemy import SqlalchemyOrmPage #<- provides pagination
from ..models.blog_record import BlogRecord, Topics, Tags
from markdown2 import Markdown


class BlogRecordService(object):

    @classmethod
    def by_topic(cls, request, topic):
        query = """SELECT entries.*, entries.slug, topics.topic_name, tags.tag_name FROM entries 
        JOIN topics ON topics.topic = entries.topic_id
        JOIN tags ON tags.topic = entries.topic_id AND tags.tag = entries.tag
        WHERE entries.topic_id = :topic ORDER BY tags.tag, entries.title
        """
        results = request.dbsession.execute(query, {'topic': topic}).fetchall()
        return results

    @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)
        return query.get(_id)

    @classmethod
    def get_last_five(cls, request):
        # gest the last 5 items modified
        query = request.dbsession.query(BlogRecord.id, BlogRecord.title, BlogRecord.edited, Topics.topic_name).join(Topics, Topics.topic == BlogRecord.topic_id)
        query = query.order_by(sa.desc(BlogRecord.edited)).limit(5).all()
        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).all()
        return query

    @classmethod
    def get_topic_name(cls, request, id):
        # gest the last 5 items modified
        query = request.dbsession.query(Topics).filter(Topics.topic == id).first()
        return query.topic_name.upper()

    @classmethod
    def proc_after_create(cls, request, _id):
        entry = request.dbsession.query(BlogRecord).get(_id)
        # convertir mardown en HTML
        markdowner = Markdown()
        entry.body_html = markdowner.convert(entry.body)
        return 

    @classmethod
    def proc_after_update(cls, request, _id):
        entry = request.dbsession.query(BlogRecord).get(_id)
        entry.edited = datetime.datetime.now()
        entry.title_url = entry.slug
        # convertir mardown en HTML
        markdowner = Markdown()
        entry.body_html = markdowner.convert(entry.body)
        return