from sqlalchemy import Column, Integer, String, Numeric, Date, UniqueConstraint, func

from commons.models.mixin.calculator import CalculatorMixin
from commons.models.model import Model
from core.extensions import db


class AsphaltImported(db.Model, Model, CalculatorMixin):
    __tablename__ = 'ASPHALT_IMPORTED'
    id = Column('ID', Integer, primary_key=True)
    name = Column('NAME', String(128), default='', comment='名称')
    price = Column('PRICE', Numeric(16, 4), default=0, comment='价格')
    date = Column('DATE', Date, comment='日期')

    __table_args__ = (
        UniqueConstraint(name, date, name='Idx_key'),
        {'comment': '进口沥青'},
    )

    @classmethod
    def get_items(cls, year, month, name_in):
        query = cls.query
        query = cls.query_by_month(query, year, month)
        query = query.filter(cls.name.in_(name_in))
        query = query.with_entities(cls.name, func.avg(cls.price))
        query = query.group_by(cls.name)
        result = query.all()
        return result

    @classmethod
    def get_by_key(cls, name, date):
        query = cls.query
        query = query.filter(
            cls.name == name,
            cls.date == date,
        )
        return query.one_or_none()

    def upsert(self):
        result = self.get_by_key(self.name, self.date)
        if not result:
            session = db.session
            session.add(self)
            session.commit()
        else:
            session = db.session
            self.id = result.id
            session.add(result)
            session.commit()