from .coupon import ItemCouponModel
from orm import fields, model


class ItemModel(model.Model):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        self.item_id = fields.FixedValue(value=1)
        self.item_type = fields.FixedValue(value='product')
        self.item_code = fields.ThisModelValue(db_column='ProductCode')
        self.description = fields.ThisModelValue(db_column='OrdLineDescription')
        self.quantity = fields.ThisModelValue(db_column='Quantity')
        self.cost = fields.ThisModelDecimalValue(
            db_column='IFC', decimal_places=4
        )
        self.unit_price = fields.ThisModelDecimalValue(
            db_column='Price/Quantity', db_alias='unit_price', decimal_places=4
        )
        self.net_price = fields.ThisModelDecimalValue(
            db_column='Price', decimal_places=4
        )
        self.total_price = fields.ThisModelDecimalValue(
            db_column='OrdLineFinalPrice', decimal_places=4
        )
        self.taxes = fields.ThisModelValueCustomSerializer(
            db_column='OrdLineTaxAmt',
            value_serialized=lambda v: [{"code": 1, "amount": round(float(v), 4)}]
        )
        self.discounts = ItemCouponModel(
            ['Location_Code', 'Order_Date', 'Order_Number', 'Line_Number'],
            raise_not_found_error=False
        )

    class Conf:
        db_table = 'POS.dbo.Order_Lines'
        filters = ('Location_Code', 'Order_Date', 'Order_Number')