from sqlalchemy import create_engine, Table, Column, Text, String, Integer, Float, DateTime, JSON, ForeignKey
from sqlalchemy.orm import relationship
import sqlalchemy.sql.functions as func
from sqlalchemy_utc import UtcDateTime, utcnow
from wtforms_alchemy import ModelForm

from app.sql.common import db, Base, Session
# from app.sql.models.page import Page

from app.settings import app_cfg

class Annotation(Base):
  """Table for storing references to annotations"""
  __tablename__ = 'annotation'
  id = Column(Integer, primary_key=True)
  episode_id = Column(Integer)
  type = Column(String(16, convert_unicode=True), nullable=False)
  paragraph_id = Column(Integer, nullable=True)
  start_ts = Column(Float, nullable=False)
  end_ts = Column(Float, nullable=True)
  text = Column(Text(convert_unicode=True), nullable=True)
  settings = Column(JSON, default={}, nullable=True)

  def toJSON(self):
    return {
      'id': self.id,
      'episode_id': self.episode_id,
      'paragraph_id': self.paragraph_id,
      'type': self.type,
      'start_ts': self.start_ts,
      'end_ts': self.end_ts,
      'text': self.text,
      'settings': self.settings,
    }

class AnnotationForm(ModelForm):
  class Meta:
    model = Annotation
    exclude = ['start_ts', 'settings']
  def get_session():
    return Session()