from decimal import Decimal

from django.test import TestCase

from oscar.apps.address.models import Country
from oscar.apps.basket.models import Basket
from oscar.apps.order.models import ShippingAddress, Order, Line, ShippingEvent, ShippingEventType, ShippingEventQuantity

ORDER_PLACED = 'order_placed'


class ShippingAddressTest(TestCase):
    
    def test_titleless_salutation_is_stripped(self):
        country = Country.objects.get(iso_3166_1_a2='GB')
        a = ShippingAddress.objects.create(last_name='Barrington', line1="75 Smith Road", postcode="N4 8TY", country=country)
        self.assertEquals("Barrington", a.salutation())
    

class OrderTest(TestCase):
    fixtures = ['sample-order.json']

    def setUp(self):
        self.order = Order.objects.get(number='100002')
        
    def event(self, type):
        """
        Creates an order-level shipping event
        """
        type = ShippingEventType.objects.get(code=type)
        event = ShippingEvent.objects.create(order=self.order, event_type=type)
        for line in self.order.lines.all():
            ShippingEventQuantity.objects.create(event=event, line=line)  
        
    def test_shipping_status_is_empty_with_no_events(self):
        self.assertEquals("", self.order.shipping_status)

    def test_shipping_status_after_one_order_level_events(self):
        self.event(ORDER_PLACED)
        self.assertEquals("Order placed", self.order.shipping_status)

        
class LineTest(TestCase):
    fixtures = ['sample-order.json']

    def setUp(self):
        self.order = Order.objects.get(number='100002')
        self.line = self.order.lines.get(id=1)

    def event(self, type, quantity=None):
        """
        Creates a shipping event for the test line
        """
        event = ShippingEvent.objects.create(order=self.order, event_type=type)
        if quantity == None:
            quantity = self.line.quantity
        event_quantity = ShippingEventQuantity.objects.create(event=event, line=self.line, quantity=quantity)

    def test_shipping_status_is_empty_to_start_with(self):
        self.assertEquals('', self.line.shipping_status)
        
    def test_shipping_status_after_full_line_event(self):
        type = ShippingEventType.objects.get(code='order_placed')
        self.event(type)
        self.assertEquals(type.name, self.line.shipping_status)    
        
    def test_shipping_status_after_two_full_line_events(self):
        type1 = ShippingEventType.objects.get(code='order_placed')
        self.event(type1)
        type2 = ShippingEventType.objects.get(code='dispatched')
        self.event(type2)
        self.assertEquals(type2.name, self.line.shipping_status) 
        
    def test_shipping_status_after_partial_line_event(self):
        type = ShippingEventType.objects.get(code='order_placed')
        self.event(type, 3)
        expected = "%s (%d/%d items)" % (type.name, 3, self.line.quantity)
        self.assertEquals(expected, self.line.shipping_status) 
        
    def test_has_passed_shipping_status_after_full_line_event(self):
        type = ShippingEventType.objects.get(code='order_placed')
        self.event(type)
        self.assertTrue(self.line.has_shipping_event_occurred(type)) 
        
    def test_has_passed_shipping_status_after_partial_line_event(self):
        type = ShippingEventType.objects.get(code='order_placed')
        self.event(type, self.line.quantity - 1)
        self.assertFalse(self.line.has_shipping_event_occurred(type)) 
        
    def test_has_passed_shipping_status_after_multiple_line_event(self):
        event_types = [ShippingEventType.objects.get(code='order_placed'),
                        ShippingEventType.objects.get(code='dispatched')]
        for type in event_types:
            self.event(type)
        for type in event_types:
            self.assertTrue(self.line.has_shipping_event_occurred(type))
            
    def test_inconsistent_shipping_status_setting(self):
        type = ShippingEventType.objects.get(code='order_placed')
        self.event(type, self.line.quantity - 1)
        
        with self.assertRaises(ValueError):
            # Quantity is higher for second event than first
            type = ShippingEventType.objects.get(code='dispatched')
            self.event(type, self.line.quantity)
        
    def test_inconsistent_shipping_quantities(self):
        type = ShippingEventType.objects.get(code='order_placed')
        self.event(type, self.line.quantity - 1)
        
        with self.assertRaises(ValueError):
            # Total quantity is too high
            self.event(type, 2)
        
        
class ShippingEventQuantityTest(TestCase):
    fixtures = ['sample-order.json']

    def setUp(self):
        self.order = Order.objects.get(number='100002')
        self.line = self.order.lines.get(id=1)

    def test_quantity_defaults_to_all(self):
        type = ShippingEventType.objects.get(code='order_placed')
        event = ShippingEvent.objects.create(order=self.order, event_type=type)
        event_quantity = ShippingEventQuantity.objects.create(event=event, line=self.line)
        self.assertEquals(self.line.quantity, event_quantity.quantity)