from decimal import Decimal

from django.contrib.auth import get_user_model
from django.test import Client, TestCase
from django.urls import reverse

from shipping.models import Shipment
from shipping.services import buy_label, create_shipment_for_order, pirate_ship_csv, quote_rates
from shop.models import Order


class ShippingServiceTests(TestCase):
    def setUp(self):
        self.order = Order.objects.create(
            number="ORD-20260101-001",
            email="buyer@example.com",
            customer_name="Pat Lee",
            status=Order.Status.PAID,
            amount=Decimal("18.00"),
            shipping_address={
                "line1": "123 Main",
                "city": "Aurora",
                "state": "IL",
                "zip": "60506",
                "country": "US",
            },
        )

    def test_quote_and_buy_stub_label(self):
        shipment = create_shipment_for_order(self.order)
        rates = quote_rates(shipment)
        self.assertGreaterEqual(len(rates), 1)
        shipment.refresh_from_db()
        self.assertEqual(shipment.status, Shipment.Status.RATED)
        buy_label(shipment, rate_id=rates[0]["id"])
        shipment.refresh_from_db()
        self.assertEqual(shipment.status, Shipment.Status.LABELED)
        self.assertTrue(shipment.tracking_number)

    def test_pirate_ship_csv_includes_unshipped(self):
        csv_body = pirate_ship_csv()
        self.assertIn("ORD-20260101-001", csv_body)
        self.assertIn("123 Main", csv_body)
        self.assertIn("buyer@example.com", csv_body)

    def test_csv_omits_labeled_orders(self):
        shipment = create_shipment_for_order(self.order)
        quote_rates(shipment)
        buy_label(shipment)
        self.assertNotIn(self.order.number, pirate_ship_csv())


class ShippingPortalTests(TestCase):
    def setUp(self):
        User = get_user_model()
        self.user = User.objects.create_user("shipper", password="test-pass-123")
        self.client = Client()
        self.client.login(username="shipper", password="test-pass-123")
        self.order = Order.objects.create(
            number="ORD-20260101-002",
            email="a@example.com",
            status=Order.Status.PAID,
            amount=Decimal("9.00"),
            shipping_address={"line1": "9 Oak", "city": "Town", "state": "IL", "zip": "60189"},
        )

    def test_list_requires_login(self):
        self.assertEqual(Client().get(reverse("shipping:shipment_list")).status_code, 302)

    def test_create_shipment_from_portal(self):
        response = self.client.post(
            reverse("shipping:shipment_create"),
            {"order": str(self.order.pk), "weight_oz": "8"},
        )
        self.assertEqual(response.status_code, 302)
        shipment = Shipment.objects.get()
        self.assertEqual(shipment.weight_oz, 8)
        self.assertEqual(shipment.status, Shipment.Status.RATED)

    def test_csv_export(self):
        response = self.client.get(reverse("shipping:pirate_ship_export"))
        self.assertEqual(response.status_code, 200)
        self.assertEqual(response["Content-Type"], "text/csv")
        self.assertIn(b"ORD-20260101-002", response.content)