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 = request.dbsession.query(BlogRecord).join(Tags, Tags.topic == BlogRecord.topic, Tags.tag == BlogRecord.tag)
        query = query.filter(BlogRecord.topic == topic)
        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)
        return query.get(_id)

    @classmethod
    def get_last_five(cls, request):
        # gest the last 5 items modified
        query = request.dbsession.query(BlogRecord)
        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 proc_after_create(cls, request, _id):
        entry = request.dbsession.query(BlogRecord).get(_id)
        # set default values
        if entry.tag == '':
            entry.tag = 'pyramid'
        if entry.topic == '':
            entry.topic = 'blog'
        # 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()
        # convertir mardown en HTML
        markdowner = Markdown()
        entry.body_html = markdowner.convert(entry.body)
        return