from sqlalchemy import create_engine, Table, Column, Text, String, Integer, DateTime, JSON
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.settings import app_cfg

class Page(Base):
  """Table for storing references to pages"""
  __tablename__ = 'pages'
  id = Column(Integer, primary_key=True)
  graph_id = Column(Integer, ForeignKey('graph.id'), nullable=True)
  path = Column(String(64, convert_unicode=True), nullable=False)
  title = Column(String(64, convert_unicode=True), nullable=False)
  description = Column(Text(convert_unicode=True), nullable=False)
  settings = Column(JSON, default={}, nullable=True)
  created_at = Column(UtcDateTime(), default=utcnow())
  updated_at = Column(UtcDateTime(), default=utcnow())

  tiles = relationship("Tile", secondary="tiles", lazy='dynamic')

  def toJSON(self):
    return {
      'id': self.id,
      'graph_id': self.graph_id,
      'path': self.path,
      'title': self.title,
      'description': self.description,
      'settings': self.settings,
      'created_at': self.created_at,
      'updated_at': self.updated_at,
    }