def test_basic_order():
    PRODUCTS_TO_SEND = 10
    product = get_default_product()
    supplier = get_default_supplier()
    order = create_order_with_product(
        product,
        supplier=supplier,
        quantity=PRODUCTS_TO_SEND,
        taxless_base_unit_price=10,
        tax_rate=Decimal("0.5")
    )
    assert order.shop.prices_include_tax is False
    price = order.shop.create_price
    currency = order.currency

    discount_order_line = OrderLine(order=order, quantity=1, type=OrderLineType.OTHER)
    discount_order_line.discount_amount = price(30)
    assert discount_order_line.price == price(-30)
    discount_order_line.save()

    order.cache_prices()
    order.check_all_verified()
    order.save()
    assert order.taxful_total_price == TaxfulPrice(PRODUCTS_TO_SEND * (10 + 5) - 30, currency)
    shipment = order.create_shipment_of_all_products(supplier=supplier)
    assert shipment.total_products == PRODUCTS_TO_SEND, "All products were shipped"
    assert shipment.weight == product.gross_weight * PRODUCTS_TO_SEND / 1000, "Gravity works"
    assert not order.get_unshipped_products(), "Nothing was left in the warehouse"
    order.shipping_status = ShippingStatus.FULLY_SHIPPED
    order.create_payment(order.taxful_total_price)
    assert order.payments.exists(), "A payment was created"
    with pytest.raises(NoPaymentToCreateException):
        order.create_payment(Money(6, currency))
    assert order.is_paid(), "Order got paid"
    assert order.can_set_complete(), "Finalization is possible"
    order.status = OrderStatus.objects.get_default_complete()
    assert order.is_complete(), "Finalization done"

    summary = order.get_tax_summary()
    assert len(summary) == 2
    assert summary[0].tax_rate * 100 == 50
    assert summary[0].based_on == Money(100, currency)
    assert summary[0].tax_amount == Money(50, currency)
    assert summary[0].taxful == summary[0].based_on + summary[0].tax_amount
    assert summary[1].tax_id is None
    assert summary[1].tax_code == ''
    assert summary[1].tax_amount == Money(0, currency)
    assert summary[1].tax_rate == 0
    assert order.get_total_tax_amount() == Money(50, currency)

def add_product_to_order(order, supplier, product, quantity, taxless_base_unit_price, tax_rate=0, pricing_context=None):
    if not pricing_context:
        pricing_context = _get_pricing_context(order.shop, order.customer)
    product_order_line = OrderLine(order=order)
    update_order_line_from_product(pricing_context,
                                   order_line=product_order_line,
                                   product=product, quantity=quantity,
                                   supplier=supplier)
    product_order_line.base_unit_price = order.shop.create_price(taxless_base_unit_price)
    product_order_line.save()
    product_order_line.taxes.add(OrderLineTax.from_tax(
        get_test_tax(tax_rate),
        product_order_line.taxless_price.amount,
        order_line=product_order_line,
    ))

def add_product_to_order(order, supplier, product, quantity, taxless_base_unit_price, tax_rate=0, pricing_context=None):
    if not pricing_context:
        pricing_context = _get_pricing_context(order.shop, order.customer)
    product_order_line = OrderLine(order=order)
    update_order_line_from_product(pricing_context,
                                   order_line=product_order_line,
                                   product=product, quantity=quantity,
                                   supplier=supplier)
    base_unit_price = order.shop.create_price(taxless_base_unit_price)
    if order.prices_include_tax:
        base_unit_price *= (1 + tax_rate)
    product_order_line.base_unit_price = order.shop.create_price(base_unit_price)
    product_order_line.save()
    product_order_line.taxes.add(OrderLineTax.from_tax(
        get_test_tax(tax_rate),
        Money(quantity * taxless_base_unit_price, order.currency),
        order_line=product_order_line,
    ))

def test_line_discount():
    order = create_empty_order(prices_include_tax=False)
    order.save()
    currency = order.shop.currency
    ol = OrderLine(
        order=order,
        type=OrderLineType.OTHER,
        quantity=5,
        text="Thing"
    )
    ol.discount_amount = order.shop.create_price(50)
    ol.base_unit_price = order.shop.create_price(40)
    ol.save()
    ol.taxes.add(OrderLineTax.from_tax(
        get_default_tax(), ol.taxless_price.amount, order_line=ol))
    assert ol.taxless_discount_amount == order.shop.create_price(50)
    assert ol.taxful_discount_amount == TaxfulPrice(75, currency)
    assert ol.taxless_price == order.shop.create_price(150)
    assert ol.taxful_price == TaxfulPrice(150 + 75, currency)
    assert ol.taxless_base_unit_price == order.shop.create_price(40)
    assert ol.taxful_base_unit_price == TaxfulPrice(60, currency)
    assert "Thing" in six.text_type(ol)

def test_refunds_for_discounted_order_lines():
    shop = get_default_shop()
    supplier = get_default_supplier()
    product = create_product(
        "test-sku",
        shop=get_default_shop(),
        default_price=10,
        stock_behavior=StockBehavior.STOCKED
    )

    order = create_order_with_product(product, supplier, 2, 200, shop=shop)
    discount_line = OrderLine(
        order_id=order.id, type=OrderLineType.DISCOUNT, quantity=1, discount_amount_value=Decimal("0.54321"))
    discount_line.save()
    order.lines.add(discount_line)

    product_line = order.lines.filter(type=OrderLineType.PRODUCT).first()
    product_line.discount_amount = TaxfulPrice(100, order.currency)
    product_line.save()
    taxful_price_with_discount = product_line.taxful_price
    order.cache_prices()
    order.save()

    assert product_line.base_price == TaxfulPrice(400, order.currency)
    assert taxful_price_with_discount == TaxfulPrice(300, order.currency)

    # try to refund only the product line - should fail since this would result in a negative total
    with pytest.raises(RefundExceedsAmountException):
        order.create_refund([{"line": product_line, "quantity": 2, "amount": taxful_price_with_discount.amount}])

    # try to refund the product line with a negative amount
    with pytest.raises(InvalidRefundAmountException):
        order.create_refund([{"line": product_line, "quantity": 1, "amount": -taxful_price_with_discount.amount}])
    # try to refund the discount line with a positive amount
    with pytest.raises(InvalidRefundAmountException):
        order.create_refund([{"line": discount_line, "quantity": 1, "amount": -discount_line.taxful_price.amount}])

    order.create_refund([
        {"line": discount_line, "quantity": 1, "amount": discount_line.taxful_price.amount},
        {"line": product_line, "quantity": 2, "amount": taxful_price_with_discount.amount}
    ])
    assert product_line.max_refundable_amount.value == 0
    assert discount_line.max_refundable_amount.value == 0
    assert order.taxful_total_price.value == 0

    order = create_order_with_product(product, supplier, 2, 200, shop=shop)
    discount_line = OrderLine(
        order_id=order.id, type=OrderLineType.DISCOUNT, quantity=1, discount_amount_value=Decimal("0.54321"))
    discount_line.save()
    order.lines.add(discount_line)
    product_line = order.lines.filter(type=OrderLineType.PRODUCT).first()
    product_line.discount_amount = TaxfulPrice(100, order.currency)
    product_line.save()
    order.cache_prices()
    order.save()

    order.create_full_refund(restock_products=False)
    assert order.taxful_total_price.value == 0

    def create_package_children(self, order_line):
        order = order_line.order
        parent_product = order_line.product
        # :type parent_product: shuup.core.models.Product
        if not (parent_product and parent_product.is_package_parent()):
            return

        child_to_quantity = parent_product.get_package_child_to_quantity_map()
        for (child_product, child_quantity) in child_to_quantity.items():
            child_order_line = OrderLine(order=order, parent_line=order_line)
            update_order_line_from_product(
                pricing_context=None,  # Will use zero price
                order_line=child_order_line,
                product=child_product,
                quantity=(order_line.quantity * child_quantity),
            )
            # Package children are free
            assert child_order_line.base_unit_price.value == 0
            child_order_line.source_line = None
            child_order_line.parent_source_line = order_line.source_line
            child_order_line.supplier = order_line.supplier
            self._check_orderability(child_order_line)
            yield child_order_line

def test_rounding(prices):
    expected = 0
    for p in prices:
        expected += bankers_round(p, 2)

    order = create_empty_order(prices_include_tax=False)
    order.save()
    for x, price in enumerate(prices):
        ol = OrderLine(
            order=order,
            type=OrderLineType.OTHER,
            quantity=1,
            text="Thing",
            ordering=x,
            base_unit_price=order.shop.create_price(price)
        )
        ol.save()
    order.cache_prices()
    for x, order_line in enumerate(order.lines.all().order_by("ordering")):
        price = Decimal(prices[x]).quantize(Decimal(".1") ** 9)

        # make sure prices are in database with original precision
        assert order_line.base_unit_price == order.shop.create_price(price)

        # make sure the line taxless price is rounded
        assert order_line.taxless_price == order.shop.create_price(bankers_round(price, 2))

        # Check that total prices calculated from priceful parts still matches
        assert _get_taxless_price(order_line) == order_line.taxless_price
        assert _get_taxful_price(order_line) == order_line.taxful_price

        # make sure the line price is rounded
        assert order_line.price == order.shop.create_price(price)

    # make sure order total is rounded
    assert order.taxless_total_price == order.shop.create_price(bankers_round(expected, 2))

def add_product_to_order(order, supplier, product, quantity, taxless_base_unit_price, tax_rate=0, pricing_context=None):
    if not pricing_context:
        pricing_context = _get_pricing_context(order.shop, order.customer)
    product_order_line = OrderLine(order=order)
    update_order_line_from_product(pricing_context,
                                   order_line=product_order_line,
                                   product=product, quantity=quantity,
                                   supplier=supplier)
    base_unit_price = order.shop.create_price(taxless_base_unit_price)
    if order.prices_include_tax:
        base_unit_price *= (1 + tax_rate)
    product_order_line.base_unit_price = order.shop.create_price(base_unit_price)
    product_order_line.save()

    taxes = [get_test_tax(tax_rate)]
    price = quantity * base_unit_price
    taxed_price = stacked_value_added_taxes(price, taxes)
    order_line_tax = OrderLineTax.from_tax(
        taxes[0],
        taxed_price.taxless.amount,
        order_line=product_order_line,
    )
    order_line_tax.save()  # Save order line tax before linking to order_line.taxes
    product_order_line.taxes.add(order_line_tax)

def test_line_discount_more():
    order = create_empty_order()
    order.save()
    ol = OrderLine(order=order, type=OrderLineType.OTHER)
    ol.quantity = 5
    ol.base_unit_price = order.shop.create_price(30)
    ol.discount_amount = order.shop.create_price(50)
    ol.save()
    currency = order.shop.currency
    assert ol.taxless_base_unit_price == TaxlessPrice(30, currency)
    assert ol.taxless_discount_amount == TaxlessPrice(50, currency)
    assert ol.taxless_price == TaxlessPrice(5 * 30 - 50, currency)
    ol.taxes.add(OrderLineTax.from_tax(
        get_default_tax(), ol.taxless_price.amount, order_line=ol))
    assert ol.taxless_discount_amount == TaxlessPrice(50, currency)
    assert ol.taxful_discount_amount == TaxfulPrice(75, currency)
    assert ol.taxless_price == TaxlessPrice(100, currency)
    assert ol.taxful_price == TaxfulPrice(150, currency)
    assert ol.taxless_base_unit_price == TaxlessPrice(30, currency)
    assert ol.taxful_base_unit_price == TaxfulPrice(45, currency)

def create_order(request, creator, customer, product):
    billing_address = get_address().to_immutable()
    shipping_address = get_address(name="Shippy Doge").to_immutable()
    shipping_address.save()
    default_pm = get_default_payment_method()
    default_sm = get_default_shipping_method()
    shop = request.shop
    order = Order(
        creator=creator,
        customer=customer,
        shop=shop,
        payment_method=default_pm,
        shipping_method=default_sm,
        billing_address=billing_address,
        shipping_address=shipping_address,
        order_date=now(),
        status=get_initial_order_status(),
        currency=shop.currency,
        prices_include_tax=shop.prices_include_tax,
    )
    order.full_clean()
    order.save()
    supplier = get_default_supplier()
    product_order_line = OrderLine(order=order)
    update_order_line_from_product(
        pricing_context=request,
        order_line=product_order_line,
        product=product,
        quantity=5,
        supplier=supplier)

    assert product_order_line.text == product.safe_translation_getter("name")
    product_order_line.base_unit_price = shop.create_price(100)
    assert product_order_line.price.value > 0
    product_order_line.save()

    line_tax = get_line_taxes_for(product_order_line)[0]

    order_line_tax = OrderLineTax.from_tax(
        tax=line_tax.tax,
        base_amount=line_tax.base_amount,
        order_line=product_order_line,
    )
    order_line_tax.save()  # Save order_line_tax before linking to order_line.tax
    product_order_line.taxes.add(order_line_tax)

    discount_order_line = OrderLine(order=order, quantity=1, type=OrderLineType.OTHER)
    discount_order_line.discount_amount = shop.create_price(30)
    assert discount_order_line.discount_amount.value == 30
    assert discount_order_line.price.value == -30
    assert discount_order_line.base_unit_price.value == 0
    discount_order_line.save()

    order.cache_prices()
    order.check_all_verified()
    order.save()

    assert not order.can_set_complete()

    base = 5 * shop.create_price(100).amount
    discount = shop.create_price(30).amount
    tax_value = line_tax.amount
    if not order.prices_include_tax:
        assert order.taxless_total_price.amount == base - discount
        assert order.taxful_total_price.amount == base + tax_value - discount
    else:
        assert_almost_equal(order.taxless_total_price.amount, base - tax_value - discount)
        assert_almost_equal(order.taxful_total_price.amount, base - discount)

    assert not order.is_fully_shipped()
    shipment = order.create_shipment_of_all_products(supplier=supplier)
    assert order.is_fully_shipped()

    assert shipment.total_products == 5, "All products were shipped"
    assert shipment.weight == product.gross_weight * 5 / 1000, "Gravity works"
    assert not order.get_unshipped_products(), "Nothing was left in the warehouse"

    assert order.can_set_complete()

    order.create_payment(order.taxful_total_price)
    assert order.is_paid()
    assert Order.objects.paid().filter(pk=order.pk).exists(), "It was paid! Honestly!"
    assert order.has_products()

    assert order.get_available_shipping_methods()
    assert order.get_available_payment_methods()

    assert default_sm in order.get_available_shipping_methods()
    assert default_pm in order.get_available_payment_methods()

    def source_line_to_order_lines(self, order, source_line):
        """
        Convert a source line into one or more order lines.

        Normally each source line will yield just one order line, but
        package products will yield a parent line and its child lines.

        :type order: shuup.core.models.Order
        :param order: The order
        :type source_line: shuup.core.order_creator.SourceLine
        :param source_line: The SourceLine
        :rtype: Iterable[OrderLine]
        """
        order_line = OrderLine(order=order)
        product = source_line.product
        quantity = Decimal(source_line.quantity)
        if product:
            order_line.product = product
            if product.sales_unit:
                quantized_quantity = bankers_round(quantity, product.sales_unit.decimals)
                if quantized_quantity != quantity:
                    raise ValueError("Sales unit decimal conversion causes precision loss!")
        else:
            order_line.product = None

        def text(value):
            return force_text(value) if value is not None else ""

        order_line.quantity = quantity
        order_line.supplier = source_line.supplier
        order_line.sku = text(source_line.sku)
        order_line.text = (text(source_line.text))[:192]
        if source_line.base_unit_price:
            order_line.base_unit_price = source_line.base_unit_price
        if source_line.discount_amount:
            order_line.discount_amount = source_line.discount_amount
        order_line.type = (source_line.type if source_line.type is not None
                           else OrderLineType.OTHER)
        order_line.accounting_identifier = text(source_line.accounting_identifier)
        order_line.require_verification = bool(source_line.require_verification)
        order_line.verified = (not order_line.require_verification)
        order_line.source_line = source_line
        order_line.parent_source_line = source_line.parent_line
        extra_data = source_line.data.get("extra", {}) if hasattr(source_line, "data") else {}
        extra_data.update({"source_line_id": source_line.line_id})

        order_line.extra_data = extra_data
        self._check_orderability(order_line)

        yield order_line

        for child_order_line in self.create_package_children(order_line):
            yield child_order_line