import datetime

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

from commons.models.mixin.base import BaseModelMixin
from commons.models.model import Model
from core.extensions import db


class DataNetwork(db.Model,  Model, BaseModelMixin):
    __tablename__ = 'DATA_NETWORK'

    id = Column('ID', Integer, primary_key=True)
    material_id = Column('MATERIAL_ID', String(128), comment='')
    spec = Column('SPEC', String(128), comment='')
    unit = Column('UNIT', String(128), comment='')
    brand = Column('BRAND', String(128), comment='')
    name = Column('NAME', String(128), comment='')
    price = Column('PRICE', Numeric(16, 4), comment='')
    source = Column('SOURCE', String(128), comment='')
    remark = Column('REMARK', Text, comment='')
    date = Column('DATE', Date, comment='')
    region = Column('REGION', String(64), comment='')

    __table_args__ = (
        UniqueConstraint(name, spec, region, date, name='Idx_key'),
        {'comment': '网络数据'},
    )

    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)

    def find_by_key(self):
        query = DataNetwork.query
        query = query.filter(DataNetwork.name == self.name)
        query = query.filter(DataNetwork.spec == self.spec)
        query = query.filter(DataNetwork.region == self.region)
        query = query.filter(DataNetwork.date == self.date)
        result = query.one_or_none()
        return result

    @classmethod
    def get_query(cls, year, month, name, spec, region="福州"):
        start_date = datetime.date(year, month, 1)
        end_date = start_date + relativedelta(months=1)
        query = cls.query
        query = query.filter(cls.date >= start_date)
        query = query.filter(cls.date < end_date)
        if name:
            query = query.filter(cls.name == name)
        if spec:
            query = query.filter(cls.spec.like(f'%{spec}%'))
        if region:
            query = query.filter(cls.region.like(f'%{region}%'))
        return query