import datetime

from dateutil.relativedelta import relativedelta
from sqlalchemy import Column, Integer, String, Date, UniqueConstraint, Numeric

from core.extensions import db


class FujianSurvey(db.Model):
    __tablename__ = 'FUJIAN_SURVEY'
    id = Column('ID', Integer, primary_key=True)
    name = Column('NAME', String(128), default='', comment='名称')
    spec = Column('SPEC', String(128), default='', comment='规格')
    price = Column('PRICE', Numeric(16, 4), default=0, comment='价格')
    date = Column('DATE', Date, comment='日期')
    material_id = Column('MATERIAL_ID', String(128), comment='材料id')
    unit = Column('UNIT', String(128), comment='单位')
    brand = Column('BRAND', String(128), comment='品牌')
    tax = Column('TAX', Integer, comment='税率')

    __table_args__ = (
        UniqueConstraint(name, spec, date, name='Idx_key'),
        {'comment': '福建省交通工程材料调查表'},
    )

    @classmethod
    def get_query(cls, year=None, month=None, name=None, spec=None, name_in=None):
        query = cls.query
        if year and month:
            start_date = datetime.date(year, month, 1)
            end_date = start_date + relativedelta(months=1)
            query = query.filter(cls.date >= start_date)
            query = query.filter(cls.date < end_date)
        if name:
            query = query.filter(cls.name == name)
        if name_in:
            query = query.filter(cls.name.in_(name_in))
        if spec:
            query = query.filter(cls.spec == spec)
        return query